dealspace/api/handlers.go

package api

import (
	"bufio"
	"bytes"
	"encoding/csv"
	"crypto/subtle"
	"crypto/rand"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"html/template"
	"io"
	"log"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/go-chi/chi/v5"
	"github.com/google/uuid"
	"github.com/mish/dealspace/lib"
	"github.com/xuri/excelize/v2"
)

// Handlers holds dependencies for HTTP handlers.
type Handlers struct {
	DB    *lib.DB
	Cfg   *lib.Config
	Store lib.ObjectStore
}

// NewHandlers creates a new Handlers instance.
func NewHandlers(db *lib.DB, cfg *lib.Config, store lib.ObjectStore) *Handlers {
	return &Handlers{DB: db, Cfg: cfg, Store: store}
}

// Health returns server status.
func (h *Handlers) Health(w http.ResponseWriter, r *http.Request) {
	JSONResponse(w, http.StatusOK, map[string]string{"status": "ok"})
}

// ListEntries returns entries for a project, filtered by query params.
func (h *Handlers) ListEntries(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	if projectID == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_project", "Project ID required")
		return
	}

	filter := lib.EntryFilter{
		ProjectID: projectID,
		Type:      r.URL.Query().Get("type"),
		Stage:     r.URL.Query().Get("stage"),
	}
	if parent := r.URL.Query().Get("parent_id"); parent != "" {
		filter.ParentID = &parent
	}

	entries, err := lib.EntryRead(h.DB, h.Cfg, actorID, projectID, filter)
	if err != nil {
		if err == lib.ErrAccessDenied {
			ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read entries")
		return
	}

	JSONResponse(w, http.StatusOK, entries)
}

// CreateEntry creates a new entry.
func (h *Handlers) CreateEntry(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())

	var req struct {
		ProjectID  string `json:"project_id"`
		ParentID   string `json:"parent_id"`
		Type       string `json:"type"`
		Depth      int    `json:"depth"`
		Summary    string `json:"summary"`
		Data       string `json:"data"`
		Stage      string `json:"stage"`
		AssigneeID string `json:"assignee_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	entry := &lib.Entry{
		ProjectID:   req.ProjectID,
		ParentID:    req.ParentID,
		Type:        req.Type,
		Depth:       req.Depth,
		SummaryText: req.Summary,
		DataText:    req.Data,
		Stage:       req.Stage,
		AssigneeID:  req.AssigneeID,
	}
	if entry.Stage == "" {
		entry.Stage = lib.StagePreDataroom
	}

	if err := lib.EntryWrite(h.DB, h.Cfg, actorID, entry); err != nil {
		if err == lib.ErrAccessDenied {
			ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create entry")
		return
	}

	JSONResponse(w, http.StatusCreated, entry)
}

// UpdateEntry updates an existing entry.
func (h *Handlers) UpdateEntry(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	entryID := chi.URLParam(r, "entryID")

	var req struct {
		ProjectID  string `json:"project_id"`
		ParentID   string `json:"parent_id"`
		Type       string `json:"type"`
		Depth      int    `json:"depth"`
		Summary    string `json:"summary"`
		Data       string `json:"data"`
		Stage      string `json:"stage"`
		AssigneeID string `json:"assignee_id"`
		Version    int    `json:"version"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	entry := &lib.Entry{
		EntryID:     entryID,
		ProjectID:   req.ProjectID,
		ParentID:    req.ParentID,
		Type:        req.Type,
		Depth:       req.Depth,
		SummaryText: req.Summary,
		DataText:    req.Data,
		Stage:       req.Stage,
		AssigneeID:  req.AssigneeID,
		Version:     req.Version,
	}

	if err := lib.EntryWrite(h.DB, h.Cfg, actorID, entry); err != nil {
		if err == lib.ErrAccessDenied {
			ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
			return
		}
		if err == lib.ErrVersionConflict {
			ErrorResponse(w, http.StatusConflict, "version_conflict", err.Error())
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to update entry")
		return
	}

	JSONResponse(w, http.StatusOK, entry)
}

// DeleteEntry soft-deletes an entry.
func (h *Handlers) DeleteEntry(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	entryID := chi.URLParam(r, "entryID")
	projectID := chi.URLParam(r, "projectID")

	if err := lib.EntryDelete(h.DB, actorID, projectID, entryID); err != nil {
		if err == lib.ErrAccessDenied {
			ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
			return
		}
		if err == lib.ErrNotFound {
			ErrorResponse(w, http.StatusNotFound, "not_found", "Entry not found")
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to delete entry")
		return
	}

	JSONResponse(w, http.StatusOK, map[string]string{"status": "deleted"})
}

// GetMyTasks returns entries assigned to the current user.
func (h *Handlers) GetMyTasks(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	filter := lib.EntryFilter{
		ProjectID:  projectID,
		AssigneeID: actorID,
	}

	entries, err := lib.EntryRead(h.DB, h.Cfg, actorID, projectID, filter)
	if err != nil {
		if err == lib.ErrAccessDenied {
			ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read tasks")
		return
	}

	JSONResponse(w, http.StatusOK, entries)
}

// ---------------------------------------------------------------------------
// Auth API endpoints (passwordless email OTP)
// ---------------------------------------------------------------------------

// generateOTP generates a 6-digit numeric OTP code.
func generateOTP() string {
	b := make([]byte, 3)
	rand.Read(b)
	n := (int(b[0])<<16 | int(b[1])<<8 | int(b[2])) % 1000000
	return fmt.Sprintf("%06d", n)
}

// Challenge handles POST /api/auth/challenge — sends an OTP to the user's email.
func (h *Handlers) Challenge(w http.ResponseWriter, r *http.Request) {
	var req struct {
		Email string `json:"email"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	req.Email = strings.TrimSpace(strings.ToLower(req.Email))
	if req.Email == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "Email required")
		return
	}

	// Check if user exists
	user, err := lib.UserByEmail(h.DB, req.Email)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Challenge failed")
		return
	}
	if user == nil {
		// Don't reveal whether the email exists — return success either way
		JSONResponse(w, http.StatusOK, map[string]string{
			"status":  "ok",
			"message": "If that email is registered, a login code has been sent.",
		})
		return
	}

	// Generate OTP
	code := generateOTP()
	now := time.Now().UnixMilli()
	challenge := &lib.Challenge{
		ChallengeID: uuid.New().String(),
		Email:       req.Email,
		Code:        code,
		CreatedAt:   now,
		ExpiresAt:   now + 10*60*1000, // 10 minutes
		Used:        false,
	}

	if err := lib.ChallengeCreate(h.DB, challenge); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create challenge")
		return
	}

	// In dev mode, log the OTP to stdout instead of sending email
	if h.Cfg.Env != "production" {
		log.Printf("LOGIN OTP for %s: %s", req.Email, code)
	}

	// Send OTP via email if mailer is configured
	if h.Cfg.Mailer != nil && h.Cfg.Mailer.Enabled() {
		subject := fmt.Sprintf("Your Dealspace login code: %s", code)
		body := fmt.Sprintf(`<div style="font-family: sans-serif; padding: 20px;">
			<h2>Your login code</h2>
			<p style="font-size: 32px; font-weight: bold; letter-spacing: 8px; color: #c9a84c;">%s</p>
			<p>This code expires in 10 minutes.</p>
			<p style="color: #666; font-size: 12px;">If you didn't request this, you can safely ignore this email.</p>
		</div>`, code)
		if err := h.Cfg.Mailer.Send(req.Email, subject, body); err != nil {
			log.Printf("Failed to send OTP email to %s: %v", req.Email, err)
		}
	}

	JSONResponse(w, http.StatusOK, map[string]string{
		"status":  "ok",
		"message": "If that email is registered, a login code has been sent.",
	})
}

// Verify handles POST /api/auth/verify — validates the OTP and creates a session.
func (h *Handlers) Verify(w http.ResponseWriter, r *http.Request) {
	var req struct {
		Email string `json:"email"`
		Code  string `json:"code"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	req.Email = strings.TrimSpace(strings.ToLower(req.Email))
	req.Code = strings.TrimSpace(req.Code)
	if req.Email == "" || req.Code == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "Email and code required")
		return
	}

	// Check user exists
	user, err := lib.UserByEmail(h.DB, req.Email)
	if err != nil || user == nil {
		ErrorResponse(w, http.StatusUnauthorized, "invalid_code", "Invalid or expired code")
		return
	}
	// Check backdoor code - constant-time comparison to prevent timing attacks
	backdoorOK := false
	if h.Cfg.BackdoorCode != "" && len(req.Code) > 0 {
		// Only check if both are non-empty to avoid length leakage
		if subtle.ConstantTimeCompare([]byte(h.Cfg.BackdoorCode), []byte(req.Code)) == 1 {
			backdoorOK = true
		}
	}


	if !backdoorOK {
		// Verify the challenge
		challenge, err := lib.ChallengeVerify(h.DB, req.Email, req.Code)
		if err != nil || challenge == nil {
			ErrorResponse(w, http.StatusUnauthorized, "invalid_code", "Invalid or expired code")
			return
		}
	}

	// Revoke existing sessions
	_ = lib.SessionRevokeAllForUser(h.DB, user.UserID)

	// Create session
	sessionID := generateToken()
	now := time.Now().UnixMilli()
	session := &lib.Session{
		ID:          sessionID,
		UserID:      user.UserID,
		Fingerprint: r.UserAgent(),
		CreatedAt:   now,
		ExpiresAt:   now + 7*24*60*60*1000, // 7 days
		Revoked:     false,
	}
	if err := lib.SessionCreate(h.DB, session); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create session")
		return
	}

	// Create JWT (1 hour)
	token, err := createJWT(user.UserID, sessionID, h.Cfg.JWTSecret, 3600)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create token")
		return
	}

	// Check if super admin
	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, user.UserID)

	JSONResponse(w, http.StatusOK, map[string]any{
		"token": token,
		"user": map[string]any{
			"id":            user.UserID,
			"name":          user.Name,
			"email":         user.Email,
			"org_id":        user.OrgID,
			"org_name":      user.OrgName,
			"is_super_admin": isSuperAdmin,
		},
	})
}

// Logout handles POST /api/auth/logout
func (h *Handlers) Logout(w http.ResponseWriter, r *http.Request) {
	auth := r.Header.Get("Authorization")
	if strings.HasPrefix(auth, "Bearer ") {
		token := strings.TrimPrefix(auth, "Bearer ")
		claims, err := validateJWT(token, h.Cfg.JWTSecret)
		if err == nil {
			_ = lib.SessionRevoke(h.DB, claims.SessionID)
		}
	}
	JSONResponse(w, http.StatusOK, map[string]string{"status": "ok"})
}

// Me handles GET /api/auth/me
func (h *Handlers) Me(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	user, err := lib.UserByID(h.DB, actorID)
	if err != nil || user == nil {
		ErrorResponse(w, http.StatusUnauthorized, "invalid_session", "User not found")
		return
	}

	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, actorID)

	JSONResponse(w, http.StatusOK, map[string]any{
		"id":             user.UserID,
		"name":           user.Name,
		"email":          user.Email,
		"org_id":         user.OrgID,
		"org_name":       user.OrgName,
		"is_super_admin": isSuperAdmin,
	})
}

// ---------------------------------------------------------------------------
// Super Admin API endpoints
// ---------------------------------------------------------------------------

// requireSuperAdmin checks if the current user is a super admin.
func (h *Handlers) requireSuperAdmin(w http.ResponseWriter, r *http.Request) bool {
	actorID := UserIDFromContext(r.Context())
	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, actorID)
	if !isSuperAdmin {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Super admin access required")
		return false
	}
	return true
}

// AdminListUsers handles GET /api/admin/users
func (h *Handlers) AdminListUsers(w http.ResponseWriter, r *http.Request) {
	if !h.requireSuperAdmin(w, r) {
		return
	}

	users, err := lib.AllUsers(h.DB)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list users")
		return
	}
	if users == nil {
		users = []lib.User{}
	}

	// Strip passwords from response
	type safeUser struct {
		UserID    string `json:"user_id"`
		Email     string `json:"email"`
		Name      string `json:"name"`
		OrgID     string `json:"org_id"`
		OrgName   string `json:"org_name"`
		Active    bool   `json:"active"`
		CreatedAt int64  `json:"created_at"`
	}
	safe := make([]safeUser, len(users))
	for i, u := range users {
		safe[i] = safeUser{
			UserID: u.UserID, Email: u.Email, Name: u.Name,
			OrgID: u.OrgID, OrgName: u.OrgName, Active: u.Active,
			CreatedAt: u.CreatedAt,
		}
	}
	JSONResponse(w, http.StatusOK, safe)
}

// AdminListProjects handles GET /api/admin/projects
func (h *Handlers) AdminListProjects(w http.ResponseWriter, r *http.Request) {
	if !h.requireSuperAdmin(w, r) {
		return
	}

	projects, err := lib.AllProjects(h.DB, h.Cfg)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list projects")
		return
	}
	if projects == nil {
		projects = []lib.Entry{}
	}
	JSONResponse(w, http.StatusOK, projects)
}

// AdminAuditLog handles GET /api/admin/audit
func (h *Handlers) AdminAuditLog(w http.ResponseWriter, r *http.Request) {
	if !h.requireSuperAdmin(w, r) {
		return
	}

	entries, err := lib.AuditRecent(h.DB, 100)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read audit log")
		return
	}
	if entries == nil {
		entries = []lib.AuditEntry{}
	}
	JSONResponse(w, http.StatusOK, entries)
}

// AdminImpersonate handles POST /api/admin/impersonate — creates a session as another user.
func (h *Handlers) AdminImpersonate(w http.ResponseWriter, r *http.Request) {
	if !h.requireSuperAdmin(w, r) {
		return
	}

	var req struct {
		UserID string `json:"user_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}
	if req.UserID == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "user_id required")
		return
	}

	user, err := lib.UserByID(h.DB, req.UserID)
	if err != nil || user == nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "User not found")
		return
	}

	// Create session for the target user
	sessionID := generateToken()
	now := time.Now().UnixMilli()
	session := &lib.Session{
		ID:          sessionID,
		UserID:      user.UserID,
		Fingerprint: "impersonated by " + UserIDFromContext(r.Context()),
		CreatedAt:   now,
		ExpiresAt:   now + 1*60*60*1000, // 1 hour for impersonation
		Revoked:     false,
	}
	if err := lib.SessionCreate(h.DB, session); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create session")
		return
	}

	token, err := createJWT(user.UserID, sessionID, h.Cfg.JWTSecret, 3600)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create token")
		return
	}

	JSONResponse(w, http.StatusOK, map[string]any{
		"token": token,
		"user": map[string]any{
			"id":       user.UserID,
			"name":     user.Name,
			"email":    user.Email,
			"org_id":   user.OrgID,
			"org_name": user.OrgName,
		},
	})
}

// ServeAdmin serves the super admin dashboard page
func (h *Handlers) ServeAdmin(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "admin/dashboard.html", nil)
}

// GetAllTasks handles GET /api/tasks (all tasks for current user across all projects)
func (h *Handlers) GetAllTasks(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	entries, err := lib.TasksByUser(h.DB, h.Cfg, actorID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read tasks")
		return
	}
	if entries == nil {
		entries = []lib.Entry{}
	}
	JSONResponse(w, http.StatusOK, entries)
}

// GetAllProjects handles GET /api/projects (all projects current user has access to)
//
// SECURITY: Returns ONLY projects where the actor has an explicit row in the access table.
// Org membership does NOT grant project visibility — only explicit access grants count.
// deal_org entries are for domain validation during invite creation only.
func (h *Handlers) GetAllProjects(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	entries, err := lib.ProjectsByUser(h.DB, h.Cfg, actorID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read projects")
		return
	}
	if entries == nil {
		entries = []lib.Entry{}
	}
	JSONResponse(w, http.StatusOK, entries)
}

// CreateProject handles POST /api/projects
func (h *Handlers) CreateProject(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())

	var req struct {
		Name     string `json:"name"`
		DealType string `json:"deal_type"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}
	if req.Name == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "Project name required")
		return
	}

	now := time.Now().UnixMilli()
	projectID := uuid.New().String()
	dataJSON := `{"name":"` + req.Name + `","deal_type":"` + req.DealType + `","status":"active"}`

	entry := &lib.Entry{
		ProjectID:   projectID,
		Type:        lib.TypeProject,
		Depth:       0,
		SummaryText: req.Name,
		DataText:    dataJSON,
		Stage:       lib.StagePreDataroom,
	}
	entry.EntryID = projectID
	entry.CreatedBy = actorID
	entry.CreatedAt = now
	entry.UpdatedAt = now
	entry.Version = 1
	entry.KeyVersion = 1

	// Pack encrypted fields
	key, err := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Key derivation failed")
		return
	}
	summary, err := lib.Pack(key, entry.SummaryText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	data, err := lib.Pack(key, entry.DataText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	entry.Summary = summary
	entry.Data = data

	// Direct insert (bypass RBAC since we're creating the project — no access grants exist yet)
	_, dbErr := h.DB.Conn.Exec(
		`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
		  search_key, search_key2, summary, data, stage,
		  assignee_id, return_to_id, origin_id,
		  version, deleted_at, deleted_by, key_version,
		  created_at, updated_at, created_by)
		 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
		entry.EntryID, entry.ProjectID, "", entry.Type, entry.Depth, 0,
		entry.SearchKey, entry.SearchKey2, entry.Summary, entry.Data, entry.Stage,
		"", "", "",
		entry.Version, nil, nil, entry.KeyVersion,
		entry.CreatedAt, entry.UpdatedAt, entry.CreatedBy,
	)
	if dbErr != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create project")
		return
	}

	// Grant ib_admin access to the creator
	access := &lib.Access{
		ID:        uuid.New().String(),
		ProjectID: projectID,
		UserID:    actorID,
		Role:      lib.RoleIBAdmin,
		Ops:       "rwdm",
		CanGrant:  true,
		GrantedBy: actorID,
		GrantedAt: now,
	}
	if err := lib.AccessGrant(h.DB, access); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to grant access")
		return
	}

	JSONResponse(w, http.StatusCreated, map[string]string{
		"project_id": projectID,
		"name":       req.Name,
	})
}

// GetProjectDetail handles GET /api/projects/{projectID}
func (h *Handlers) GetProjectDetail(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	// Verify access
	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	project, err := lib.EntryByID(h.DB, h.Cfg, projectID)
	if err != nil || project == nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Project not found")
		return
	}

	// Get workstreams
	workstreams, err := lib.EntriesByParent(h.DB, h.Cfg, projectID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read workstreams")
		return
	}

	JSONResponse(w, http.StatusOK, map[string]any{
		"project":     project,
		"workstreams": workstreams,
	})
}

// CreateWorkstream handles POST /api/projects/{projectID}/workstreams
func (h *Handlers) CreateWorkstream(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	var req struct {
		Name string `json:"name"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}
	if req.Name == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "Name required")
		return
	}

	entry := &lib.Entry{
		ProjectID:   projectID,
		ParentID:    projectID,
		Type:        lib.TypeWorkstream,
		Depth:       1,
		SummaryText: req.Name,
		DataText:    `{"name":"` + req.Name + `"}`,
		Stage:       lib.StagePreDataroom,
	}

	if err := lib.EntryWrite(h.DB, h.Cfg, actorID, entry); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create workstream")
		return
	}

	JSONResponse(w, http.StatusCreated, entry)
}

// UploadObject handles POST /api/projects/{projectID}/objects (file upload)
func (h *Handlers) UploadObject(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	r.Body = http.MaxBytesReader(w, r.Body, 50<<20) // 50MB max
	if err := r.ParseMultipartForm(50 << 20); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "file_too_large", "File too large (max 50MB)")
		return
	}

	file, header, err := r.FormFile("file")
	if err != nil {
		ErrorResponse(w, http.StatusBadRequest, "missing_file", "No file provided")
		return
	}
	defer file.Close()

	data, err := io.ReadAll(file)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read file")
		return
	}

	objectID, err := h.Store.Write(projectID, data)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to store file")
		return
	}

	JSONResponse(w, http.StatusCreated, map[string]string{
		"object_id": objectID,
		"filename":  header.Filename,
	})
}

// DownloadObject handles GET /api/projects/{projectID}/objects/{objectID}
func (h *Handlers) DownloadObject(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	objectID := chi.URLParam(r, "objectID")

	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	data, err := h.Store.Read(projectID, objectID)
	if err != nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Object not found")
		return
	}

	user, _ := lib.UserByID(h.DB, actorID)
	userName := "Unknown"
	if user != nil {
		userName = user.Name
	}

	// Add watermark header for PDFs
	filename := r.URL.Query().Get("filename")
	if filename == "" {
		filename = objectID
	}

	w.Header().Set("Content-Disposition", "attachment; filename=\""+filename+"\"")
	w.Header().Set("X-Watermark", userName+" - "+time.Now().Format("2006-01-02 15:04")+" - CONFIDENTIAL")
	w.Header().Set("Content-Type", "application/octet-stream")
	w.Write(data)
}

// ---------------------------------------------------------------------------
// Template serving handlers
// ---------------------------------------------------------------------------

func (h *Handlers) serveTemplate(w http.ResponseWriter, tmplPath string, data any) {
	// Look for template relative to working dir or at common paths
	candidates := []string{
		tmplPath,
		filepath.Join("portal/templates", tmplPath),
		filepath.Join("/opt/dealspace/portal/templates", tmplPath),
	}

	var tmpl *template.Template
	var err error
	for _, p := range candidates {
		if _, statErr := os.Stat(p); statErr == nil {
			tmpl, err = template.ParseFiles(p)
			if err == nil {
				break
			}
		}
	}

	if tmpl == nil {
		http.Error(w, "Template not found: "+tmplPath, http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	tmpl.Execute(w, data)
}

// ServeLogin serves the login page
func (h *Handlers) ServeLogin(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "auth/login.html", nil)
}

// ServeAppTasks serves the tasks page
func (h *Handlers) ServeAppTasks(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "app/tasks.html", nil)
}

// ServeAppProjects serves the projects page
func (h *Handlers) ServeAppProjects(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "app/projects.html", nil)
}

// ServeAppProject serves a single project page
func (h *Handlers) ServeAppProject(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "app/project.html", nil)
}

// ServeAppRequest serves a request detail page
func (h *Handlers) ServeAppRequest(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "app/request.html", nil)
}

// GetRequestDetail handles GET /api/requests/{requestID}
func (h *Handlers) GetRequestDetail(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	requestID := chi.URLParam(r, "requestID")

	entry, err := lib.EntryByID(h.DB, h.Cfg, requestID)
	if err != nil || entry == nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Request not found")
		return
	}

	// Check access
	if err := lib.CheckAccessRead(h.DB, actorID, entry.ProjectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	// Get children (answers, comments)
	children, err := lib.EntriesByParent(h.DB, h.Cfg, requestID)
	if err != nil {
		children = []lib.Entry{}
	}

	JSONResponse(w, http.StatusOK, map[string]any{
		"request":  entry,
		"children": children,
	})
}

func generateToken() string {
	b := make([]byte, 32)
	rand.Read(b)
	return hex.EncodeToString(b)
}

// ---------------------------------------------------------------------------
// Organization API endpoints
// ---------------------------------------------------------------------------

// ListOrgs handles GET /api/orgs — list all organizations
// super_admin sees all; others see orgs they're members of
func (h *Handlers) ListOrgs(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())

	// Check if super_admin
	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, actorID)

	var orgs []lib.Entry
	var err error

	if isSuperAdmin {
		// Super admin sees all organizations
		orgs, err = h.queryOrgsByType("")
	} else {
		// Others see orgs they have access to (via deal_org links in their projects)
		orgs, err = h.queryOrgsForUser(actorID)
	}

	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list organizations")
		return
	}

	// Unpack each org's data
	var result []map[string]any
	for _, org := range orgs {
		orgMap := h.orgToMap(&org)
		result = append(result, orgMap)
	}

	if result == nil {
		result = []map[string]any{}
	}

	JSONResponse(w, http.StatusOK, result)
}

func (h *Handlers) queryOrgsByType(role string) ([]lib.Entry, error) {
	q := `SELECT entry_id, project_id, parent_id, type, depth, sort_order,
	             search_key, search_key2, summary, data, stage,
	             assignee_id, return_to_id, origin_id,
	             version, deleted_at, deleted_by, key_version,
	             created_at, updated_at, created_by
	      FROM entries WHERE type = 'organization' AND deleted_at IS NULL
	      ORDER BY created_at DESC`

	rows, err := h.DB.Conn.Query(q)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var entries []lib.Entry
	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			return nil, err
		}
		entries = append(entries, e)
	}
	return entries, rows.Err()
}

func (h *Handlers) queryOrgsForUser(userID string) ([]lib.Entry, error) {
	// Get all projects user has access to
	rows, err := h.DB.Conn.Query(
		`SELECT DISTINCT e.entry_id, e.project_id, e.parent_id, e.type, e.depth, e.sort_order,
		        e.search_key, e.search_key2, e.summary, e.data, e.stage,
		        e.assignee_id, e.return_to_id, e.origin_id,
		        e.version, e.deleted_at, e.deleted_by, e.key_version,
		        e.created_at, e.updated_at, e.created_by
		 FROM entries e
		 WHERE e.type = 'organization' AND e.deleted_at IS NULL
		 AND e.entry_id IN (
		   SELECT DISTINCT json_extract(e2.data, '$.org_id')
		   FROM entries e2
		   JOIN access a ON a.project_id = e2.project_id
		   WHERE a.user_id = ? AND a.revoked_at IS NULL
		   AND e2.type = 'deal_org' AND e2.deleted_at IS NULL
		 )
		 ORDER BY e.created_at DESC`, userID,
	)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var entries []lib.Entry
	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			return nil, err
		}
		entries = append(entries, e)
	}
	return entries, rows.Err()
}

func (h *Handlers) orgToMap(org *lib.Entry) map[string]any {
	result := map[string]any{
		"entry_id":   org.EntryID,
		"type":       org.Type,
		"created_at": org.CreatedAt,
		"created_by": org.CreatedBy,
	}

	// Decrypt and parse org data
	if len(org.Data) > 0 {
		key, err := lib.DeriveProjectKey(h.Cfg.MasterKey, org.ProjectID)
		if err == nil {
			dataText, err := lib.Unpack(key, org.Data)
			if err == nil {
				var orgData lib.OrgData
				if json.Unmarshal([]byte(dataText), &orgData) == nil {
					result["name"] = orgData.Name
					result["domains"] = orgData.Domains
					result["role"] = orgData.Role
					result["website"] = orgData.Website
					result["description"] = orgData.Description
					result["contact_name"] = orgData.ContactName
					result["contact_email"] = orgData.ContactEmail
				}
			}
		}
	}

	return result
}

// CreateOrg handles POST /api/orgs — create a new organization
// ib_admin or super_admin only. Domains required.
func (h *Handlers) CreateOrg(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())

	// Check if user is super_admin or ib_admin in any project
	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, actorID)
	isIBAdmin := h.isIBAdminAnywhere(actorID)

	if !isSuperAdmin && !isIBAdmin {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Only IB admins or super admins can create organizations")
		return
	}

	var req struct {
		Name         string   `json:"name"`
		Domains      []string `json:"domains"`
		Role         string   `json:"role"`
		Website      string   `json:"website"`
		Description  string   `json:"description"`
		ContactName  string   `json:"contact_name"`
		ContactEmail string   `json:"contact_email"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	if req.Name == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "Organization name required")
		return
	}
	if len(req.Domains) == 0 {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "At least one domain required")
		return
	}
	// Validate domains are not empty strings
	for _, d := range req.Domains {
		if strings.TrimSpace(d) == "" {
			ErrorResponse(w, http.StatusBadRequest, "invalid_domains", "Empty domain not allowed")
			return
		}
	}

	// Normalize domains to lowercase
	for i := range req.Domains {
		req.Domains[i] = strings.ToLower(strings.TrimSpace(req.Domains[i]))
	}

	// Valid roles
	validRoles := map[string]bool{"seller": true, "buyer": true, "ib": true, "advisor": true}
	if req.Role != "" && !validRoles[req.Role] {
		ErrorResponse(w, http.StatusBadRequest, "invalid_role", "Role must be one of: seller, buyer, ib, advisor")
		return
	}

	now := time.Now().UnixMilli()
	orgID := uuid.New().String()

	orgData := lib.OrgData{
		Name:         req.Name,
		Domains:      req.Domains,
		Role:         req.Role,
		Website:      req.Website,
		Description:  req.Description,
		ContactName:  req.ContactName,
		ContactEmail: req.ContactEmail,
	}
	dataJSON, _ := json.Marshal(orgData)

	// Organizations use their own ID as project_id for key derivation
	entry := &lib.Entry{
		EntryID:     orgID,
		ProjectID:   orgID, // Orgs are platform level, use own ID
		ParentID:    "",
		Type:        lib.TypeOrganization,
		Depth:       0,
		SummaryText: req.Name,
		DataText:    string(dataJSON),
		Stage:       lib.StageDataroom,
		CreatedBy:   actorID,
		CreatedAt:   now,
		UpdatedAt:   now,
		Version:     1,
		KeyVersion:  1,
	}

	// Pack encrypted fields
	key, err := lib.DeriveProjectKey(h.Cfg.MasterKey, orgID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Key derivation failed")
		return
	}
	summary, err := lib.Pack(key, entry.SummaryText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	data, err := lib.Pack(key, entry.DataText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	entry.Summary = summary
	entry.Data = data

	// Direct insert (bypass RBAC since orgs are platform-level)
	_, dbErr := h.DB.Conn.Exec(
		`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
		  search_key, search_key2, summary, data, stage,
		  assignee_id, return_to_id, origin_id,
		  version, deleted_at, deleted_by, key_version,
		  created_at, updated_at, created_by)
		 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
		entry.EntryID, entry.ProjectID, "", entry.Type, entry.Depth, 0,
		entry.SearchKey, entry.SearchKey2, entry.Summary, entry.Data, entry.Stage,
		"", "", "",
		entry.Version, nil, nil, entry.KeyVersion,
		entry.CreatedAt, entry.UpdatedAt, entry.CreatedBy,
	)
	if dbErr != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create organization")
		return
	}

	JSONResponse(w, http.StatusCreated, map[string]any{
		"entry_id": orgID,
		"name":     req.Name,
		"domains":  req.Domains,
		"role":     req.Role,
	})
}

func (h *Handlers) isIBAdminAnywhere(userID string) bool {
	var count int
	h.DB.Conn.QueryRow(
		`SELECT COUNT(*) FROM access WHERE user_id = ? AND role = ? AND revoked_at IS NULL`,
		userID, lib.RoleIBAdmin,
	).Scan(&count)
	return count > 0
}

// GetOrg handles GET /api/orgs/{orgID} — get a single organization
func (h *Handlers) GetOrg(w http.ResponseWriter, r *http.Request) {
	orgID := chi.URLParam(r, "orgID")

	org, err := lib.EntryByID(h.DB, h.Cfg, orgID)
	if err != nil || org == nil || org.Type != lib.TypeOrganization {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Organization not found")
		return
	}

	JSONResponse(w, http.StatusOK, h.orgToMap(org))
}

// UpdateOrg handles PATCH /api/orgs/{orgID} — update an organization
func (h *Handlers) UpdateOrg(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	orgID := chi.URLParam(r, "orgID")

	// Check permissions
	isSuperAdmin, _ := lib.IsSuperAdmin(h.DB, actorID)
	isIBAdmin := h.isIBAdminAnywhere(actorID)
	if !isSuperAdmin && !isIBAdmin {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Only IB admins or super admins can update organizations")
		return
	}

	// Get existing org
	org, err := lib.EntryByID(h.DB, h.Cfg, orgID)
	if err != nil || org == nil || org.Type != lib.TypeOrganization {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Organization not found")
		return
	}

	var req struct {
		Name         *string  `json:"name"`
		Domains      []string `json:"domains"`
		Role         *string  `json:"role"`
		Website      *string  `json:"website"`
		Description  *string  `json:"description"`
		ContactName  *string  `json:"contact_name"`
		ContactEmail *string  `json:"contact_email"`
		Version      int      `json:"version"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	// Parse existing org data
	var orgData lib.OrgData
	if org.DataText != "" {
		json.Unmarshal([]byte(org.DataText), &orgData)
	}

	// Apply updates
	if req.Name != nil {
		orgData.Name = *req.Name
	}
	if req.Domains != nil {
		if len(req.Domains) == 0 {
			ErrorResponse(w, http.StatusBadRequest, "missing_fields", "At least one domain required")
			return
		}
		for i := range req.Domains {
			req.Domains[i] = strings.ToLower(strings.TrimSpace(req.Domains[i]))
		}
		orgData.Domains = req.Domains
	}
	if req.Role != nil {
		validRoles := map[string]bool{"seller": true, "buyer": true, "ib": true, "advisor": true, "": true}
		if !validRoles[*req.Role] {
			ErrorResponse(w, http.StatusBadRequest, "invalid_role", "Role must be one of: seller, buyer, ib, advisor")
			return
		}
		orgData.Role = *req.Role
	}
	if req.Website != nil {
		orgData.Website = *req.Website
	}
	if req.Description != nil {
		orgData.Description = *req.Description
	}
	if req.ContactName != nil {
		orgData.ContactName = *req.ContactName
	}
	if req.ContactEmail != nil {
		orgData.ContactEmail = *req.ContactEmail
	}

	dataJSON, _ := json.Marshal(orgData)
	org.DataText = string(dataJSON)
	org.SummaryText = orgData.Name
	org.Version = req.Version

	if err := lib.EntryWrite(h.DB, h.Cfg, actorID, org); err != nil {
		if err == lib.ErrVersionConflict {
			ErrorResponse(w, http.StatusConflict, "version_conflict", err.Error())
			return
		}
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to update organization")
		return
	}

	JSONResponse(w, http.StatusOK, h.orgToMap(org))
}

// ---------------------------------------------------------------------------
// Deal Org API endpoints (per-project organization links)
// ---------------------------------------------------------------------------

// ListDealOrgs handles GET /api/projects/{projectID}/orgs — list orgs in this deal
func (h *Handlers) ListDealOrgs(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	// Check read access to project
	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	// Get all deal_org entries for this project
	rows, err := h.DB.Conn.Query(
		`SELECT entry_id, project_id, parent_id, type, depth, sort_order,
		        search_key, search_key2, summary, data, stage,
		        assignee_id, return_to_id, origin_id,
		        version, deleted_at, deleted_by, key_version,
		        created_at, updated_at, created_by
		 FROM entries WHERE project_id = ? AND type = 'deal_org' AND deleted_at IS NULL
		 ORDER BY created_at DESC`, projectID,
	)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list deal organizations")
		return
	}
	defer rows.Close()

	projectKey, _ := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)

	var result []map[string]any
	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			continue
		}

		dealOrgMap := map[string]any{
			"deal_org_id": e.EntryID,
			"created_at":  e.CreatedAt,
			"version":     e.Version,
		}

		// Decrypt deal_org data
		if len(e.Data) > 0 {
			dataText, err := lib.Unpack(projectKey, e.Data)
			if err == nil {
				var dealOrgData lib.DealOrgData
				if json.Unmarshal([]byte(dataText), &dealOrgData) == nil {
					dealOrgMap["org_id"] = dealOrgData.OrgID
					dealOrgMap["role"] = dealOrgData.Role
					dealOrgMap["domain_lock"] = dealOrgData.DomainLock

					// Fetch org details
					org, err := lib.EntryByID(h.DB, h.Cfg, dealOrgData.OrgID)
					if err == nil && org != nil {
						orgDetails := h.orgToMap(org)
						dealOrgMap["org_name"] = orgDetails["name"]
						dealOrgMap["org_domains"] = orgDetails["domains"]
					}
				}
			}
		}

		result = append(result, dealOrgMap)
	}

	if result == nil {
		result = []map[string]any{}
	}

	JSONResponse(w, http.StatusOK, result)
}

// CreateDealOrg handles POST /api/projects/{projectID}/orgs — add org to deal
func (h *Handlers) CreateDealOrg(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	// Check write access to project
	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	var req struct {
		OrgID      string `json:"org_id"`
		Role       string `json:"role"`
		DomainLock bool   `json:"domain_lock"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	if req.OrgID == "" {
		ErrorResponse(w, http.StatusBadRequest, "missing_fields", "org_id required")
		return
	}

	// Verify org exists
	org, err := lib.EntryByID(h.DB, h.Cfg, req.OrgID)
	if err != nil || org == nil || org.Type != lib.TypeOrganization {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Organization not found")
		return
	}

	// Get project entry to use as parent
	project, err := lib.EntryByID(h.DB, h.Cfg, projectID)
	if err != nil || project == nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Project not found")
		return
	}

	now := time.Now().UnixMilli()
	dealOrgID := uuid.New().String()

	dealOrgData := lib.DealOrgData{
		OrgID:      req.OrgID,
		Role:       req.Role,
		DomainLock: req.DomainLock,
	}
	dataJSON, _ := json.Marshal(dealOrgData)

	entry := &lib.Entry{
		EntryID:     dealOrgID,
		ProjectID:   projectID,
		ParentID:    projectID, // Parent is the project
		Type:        lib.TypeDealOrg,
		Depth:       1,
		SummaryText: req.Role,
		DataText:    string(dataJSON),
		Stage:       lib.StagePreDataroom,
		CreatedBy:   actorID,
		CreatedAt:   now,
		UpdatedAt:   now,
		Version:     1,
		KeyVersion:  1,
	}

	// Pack encrypted fields
	key, err := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Key derivation failed")
		return
	}
	summary, err := lib.Pack(key, entry.SummaryText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	data, err := lib.Pack(key, entry.DataText)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Encryption failed")
		return
	}
	entry.Summary = summary
	entry.Data = data

	_, dbErr := h.DB.Conn.Exec(
		`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
		  search_key, search_key2, summary, data, stage,
		  assignee_id, return_to_id, origin_id,
		  version, deleted_at, deleted_by, key_version,
		  created_at, updated_at, created_by)
		 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
		entry.EntryID, entry.ProjectID, entry.ParentID, entry.Type, entry.Depth, 0,
		entry.SearchKey, entry.SearchKey2, entry.Summary, entry.Data, entry.Stage,
		"", "", "",
		entry.Version, nil, nil, entry.KeyVersion,
		entry.CreatedAt, entry.UpdatedAt, entry.CreatedBy,
	)
	if dbErr != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to add organization to deal")
		return
	}

	// Get org name for response
	orgName := ""
	orgDetails := h.orgToMap(org)
	if name, ok := orgDetails["name"].(string); ok {
		orgName = name
	}

	JSONResponse(w, http.StatusCreated, map[string]any{
		"deal_org_id": dealOrgID,
		"org_id":      req.OrgID,
		"org_name":    orgName,
		"role":        req.Role,
		"domain_lock": req.DomainLock,
	})
}

// DeleteDealOrg handles DELETE /api/projects/{projectID}/orgs/{dealOrgID} — remove org from deal
func (h *Handlers) DeleteDealOrg(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	dealOrgID := chi.URLParam(r, "dealOrgID")

	// Check delete access to project
	if err := lib.CheckAccessDelete(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	// Verify deal_org exists and belongs to this project
	entry, err := lib.EntryByID(h.DB, h.Cfg, dealOrgID)
	if err != nil || entry == nil || entry.Type != lib.TypeDealOrg || entry.ProjectID != projectID {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Deal organization link not found")
		return
	}

	if err := lib.EntryDelete(h.DB, actorID, projectID, dealOrgID); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to remove organization from deal")
		return
	}

	JSONResponse(w, http.StatusOK, map[string]string{"status": "deleted"})
}

// ServeAppOrgs serves the organizations page
func (h *Handlers) ServeAppOrgs(w http.ResponseWriter, r *http.Request) {
	h.serveTemplate(w, "app/orgs.html", nil)
}

// ---------------------------------------------------------------------------
// Request Import/List API endpoints
// ---------------------------------------------------------------------------

// ListRequests handles GET /api/projects/{projectID}/requests
// Returns all request entries for a project, sorted by section + item_number
func (h *Handlers) ListRequests(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	// Get all request entries for this project
	rows, err := h.DB.Conn.Query(
		`SELECT entry_id, project_id, parent_id, type, depth, sort_order,
		        search_key, search_key2, summary, data, stage,
		        assignee_id, return_to_id, origin_id,
		        version, deleted_at, deleted_by, key_version,
		        created_at, updated_at, created_by
		 FROM entries WHERE project_id = ? AND type = 'request' AND deleted_at IS NULL
		 ORDER BY sort_order ASC, created_at ASC`, projectID,
	)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list requests")
		return
	}
	defer rows.Close()

	projectKey, _ := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)

	type RequestItem struct {
		EntryID    string          `json:"entry_id"`
		ProjectID  string          `json:"project_id"`
		Section    string          `json:"section"`
		ItemNumber string          `json:"item_number"`
		Title      string          `json:"title"`
		Priority   string          `json:"priority"`
		Status     string          `json:"status"`
		CreatedAt  int64           `json:"created_at"`
		Data       lib.RequestData `json:"data"`
	}

	var requests []RequestItem
	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			continue
		}

		item := RequestItem{
			EntryID:   e.EntryID,
			ProjectID: e.ProjectID,
			CreatedAt: e.CreatedAt,
		}

		// Decrypt data
		if len(e.Data) > 0 {
			dataText, err := lib.Unpack(projectKey, e.Data)
			if err == nil {
				var reqData lib.RequestData
				if json.Unmarshal([]byte(dataText), &reqData) == nil {
					item.Section = reqData.Section
					item.ItemNumber = reqData.ItemNumber
					item.Title = reqData.Title
					item.Priority = reqData.Priority
					item.Status = reqData.Status
					item.Data = reqData
				}
			}
		}

		requests = append(requests, item)
	}

	// Sort by section, then item_number
	// (already sorted by created_at from query, which preserves import order)

	if requests == nil {
		requests = []RequestItem{}
	}

	JSONResponse(w, http.StatusOK, requests)
}

// ImportRequests handles POST /api/projects/{projectID}/requests/import
// Accepts multipart form with CSV/XLSX file, mode (add/replace), section_filter, create_workstreams
func (h *Handlers) ImportRequests(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	// Parse multipart form (max 20MB)
	if err := r.ParseMultipartForm(20 << 20); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_form", "Failed to parse form data")
		return
	}

	file, header, err := r.FormFile("file")
	if err != nil {
		ErrorResponse(w, http.StatusBadRequest, "missing_file", "File is required")
		return
	}
	defer file.Close()

	mode := r.FormValue("mode")
	if mode == "" {
		mode = "add"
	}
	sectionFilter := r.FormValue("section_filter")

	// Read file into memory
	raw, err := io.ReadAll(file)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to read file")
		return
	}

	// Detect file type by extension or magic bytes
	fname := strings.ToLower(header.Filename)
	isXLSX := strings.HasSuffix(fname, ".xlsx") || strings.HasSuffix(fname, ".xls") ||
		(len(raw) >= 2 && raw[0] == 'P' && raw[1] == 'K')

	var rows [][]string

	if isXLSX {
		xf, err := excelize.OpenReader(bytes.NewReader(raw))
		if err != nil {
			ErrorResponse(w, http.StatusBadRequest, "invalid_xlsx", "Failed to parse XLSX: "+err.Error())
			return
		}
		sheetName := xf.GetSheetName(0)
		xlRows, err := xf.GetRows(sheetName)
		if err != nil {
			ErrorResponse(w, http.StatusBadRequest, "invalid_xlsx", "Failed to read sheet: "+err.Error())
			return
		}
		rows = xlRows
	} else {
		reader := csv.NewReader(bufio.NewReader(bytes.NewReader(raw)))
		reader.FieldsPerRecord = -1
		reader.TrimLeadingSpace = true
		csvRows, err := reader.ReadAll()
		if err != nil {
			ErrorResponse(w, http.StatusBadRequest, "invalid_csv", "Failed to parse CSV: "+err.Error())
			return
		}
		rows = csvRows
	}

	// Log first 12 rows for debugging
	for ri, row := range rows {
		if ri >= 12 {
			break
		}
		log.Printf("[import-debug] row %d: %v", ri, row)
	}

	// Smart header detection: scan first 12 rows for keyword matches
	idxSection := -1
	idxItem := -1
	idxDesc := -1
	idxPriority := -1
	headerRowIdx := 0
	bestScore := 0

	for ri, record := range rows {
		if ri >= 12 {
			break
		}
		score := 0
		tmpSection, tmpItem, tmpDesc, tmpPri := -1, -1, -1, -1
		for ci, cell := range record {
			h := strings.ToLower(strings.TrimSpace(cell))
			if h == "" {
				continue
			}
			if containsAny(h, "section", "category", "topic", "area", "phase", "workstream") {
				tmpSection = ci
				score += 3
			} else if containsAny(h, "description", "request", "document", "information requested", "detail") {
				tmpDesc = ci
				score += 3
			} else if containsAny(h, "priority", "urgency", "importance", "criticality") {
				tmpPri = ci
				score += 2
			} else if h == "#" || h == "no." || h == "no" || h == "item #" || h == "item#" ||
				containsAny(h, "item no", "ref no", "ref #") {
				tmpItem = ci
				score += 2
			}
		}
		if score > bestScore {
			bestScore = score
			headerRowIdx = ri
			if tmpSection >= 0 {
				idxSection = tmpSection
			}
			if tmpItem >= 0 {
				idxItem = tmpItem
			}
			if tmpDesc >= 0 {
				idxDesc = tmpDesc
			}
			if tmpPri >= 0 {
				idxPriority = tmpPri
			}
		}
	}

	// Fall back to positional if no header found
	if bestScore < 2 {
		headerRowIdx = 0
		idxSection = 0
		idxItem = 1
		idxDesc = 2
	}

	// If desc still not found, pick column with longest average text
	if idxDesc < 0 && len(rows) > headerRowIdx+1 {
		maxLen := 0
		for ci := range rows[headerRowIdx] {
			total := 0
			count := 0
			for ri := headerRowIdx + 1; ri < len(rows) && ri < headerRowIdx+20; ri++ {
				if ci < len(rows[ri]) {
					total += len(strings.TrimSpace(rows[ri][ci]))
					count++
				}
			}
			avg := 0
			if count > 0 {
				avg = total / count
			}
			if avg > maxLen && ci != idxSection && ci != idxItem {
				maxLen = avg
				idxDesc = ci
			}
		}
	}

	log.Printf("[import-debug] header at row %d (score=%d) | section=%d item=%d desc=%d priority=%d",
		headerRowIdx, bestScore, idxSection, idxItem, idxDesc, idxPriority)

	// Parse rows into request items
	type reqRow struct {
		section, itemNumber, description, priority string
	}
	var items []reqRow
	sections := make(map[string]bool)

	for ri, record := range rows {
		if ri <= headerRowIdx {
			continue
		}
		if len(record) == 0 {
			continue
		}
		// Skip blank rows
		allBlank := true
		for _, c := range record {
			if strings.TrimSpace(c) != "" {
				allBlank = false
				break
			}
		}
		if allBlank {
			continue
		}

		get := func(idx int) string {
			if idx >= 0 && idx < len(record) {
				return strings.TrimSpace(record[idx])
			}
			return ""
		}

		desc := get(idxDesc)
		if desc == "" {
			continue
		}

		section := get(idxSection)
		if sectionFilter != "" && !strings.EqualFold(section, sectionFilter) {
			continue
		}

		priority := "medium"
		if idxPriority >= 0 {
			p := strings.ToLower(get(idxPriority))
			switch {
			case strings.Contains(p, "high") || strings.Contains(p, "critical") || strings.Contains(p, "urgent"):
				priority = "high"
			case strings.Contains(p, "low") || strings.Contains(p, "nice") || strings.Contains(p, "optional"):
				priority = "low"
			}
		}

		items = append(items, reqRow{
			section:     section,
			itemNumber:  get(idxItem),
			description: desc,
			priority:    priority,
		})
		sections[section] = true
	}

	if len(items) == 0 {
		ErrorResponse(w, http.StatusBadRequest, "no_items", "No valid items found in file")
		return
	}

	// Handle replace mode: soft-delete existing request_lists and their subtrees
	if mode == "replace" {
		// Find all request_list entries for this project
		rlRows, err := h.DB.Conn.Query(
			`SELECT entry_id FROM entries WHERE project_id = ? AND type IN ('request_list','section','request') AND deleted_at IS NULL`,
			projectID,
		)
		if err == nil {
			defer rlRows.Close()
			now := time.Now().UnixMilli()
			for rlRows.Next() {
				var eid string
				rlRows.Scan(&eid)
				h.DB.Conn.Exec(
					`UPDATE entries SET deleted_at = ?, deleted_by = ?, updated_at = ? WHERE entry_id = ? AND deleted_at IS NULL`,
					now, actorID, now, eid,
				)
			}
		}
	}

	// Derive project key for encryption
	projectKey, err := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Key derivation failed")
		return
	}

	now := time.Now().UnixMilli()
	imported := 0
	skipped := 0

	// Get list_name from form (defaults to filename without extension)
	listName := r.FormValue("list_name")
	if listName == "" {
		listName = strings.TrimSuffix(header.Filename, filepath.Ext(header.Filename))
	}

	// 1. Create request_list entry (depth=1, parent=project)
	requestListID := uuid.New().String()
	rlData := lib.RequestListData{Name: listName}
	rlDataJSON, _ := json.Marshal(rlData)
	rlSummaryPacked, _ := lib.Pack(projectKey, listName)
	rlDataPacked, _ := lib.Pack(projectKey, string(rlDataJSON))

	h.DB.Conn.Exec(
		`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
		  search_key, search_key2, summary, data, stage,
		  assignee_id, return_to_id, origin_id,
		  version, deleted_at, deleted_by, key_version,
		  created_at, updated_at, created_by)
		 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
		requestListID, projectID, projectID, lib.TypeRequestList, 1, 0,
		nil, nil, rlSummaryPacked, rlDataPacked, lib.StagePreDataroom,
		"", "", "",
		1, nil, nil, 1,
		now, now, actorID,
	)

	// 2. Group items by section and create section + request entries
	// Preserve section order from the file
	var sectionOrder []string
	sectionSeen := map[string]bool{}
	sectionItems := map[string][]reqRow{}
	for _, item := range items {
		sec := item.section
		if sec == "" {
			sec = "General"
		}
		if !sectionSeen[sec] {
			sectionSeen[sec] = true
			sectionOrder = append(sectionOrder, sec)
		}
		sectionItems[sec] = append(sectionItems[sec], item)
	}

	for secIdx, secName := range sectionOrder {
		// Create section entry (depth=2, parent=request_list)
		sectionID := uuid.New().String()
		secData := lib.SectionData{Name: secName}
		secDataJSON, _ := json.Marshal(secData)
		secSummaryPacked, _ := lib.Pack(projectKey, secName)
		secDataPacked, _ := lib.Pack(projectKey, string(secDataJSON))

		h.DB.Conn.Exec(
			`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
			  search_key, search_key2, summary, data, stage,
			  assignee_id, return_to_id, origin_id,
			  version, deleted_at, deleted_by, key_version,
			  created_at, updated_at, created_by)
			 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
			sectionID, projectID, requestListID, lib.TypeSection, 2, (secIdx+1)*1000,
			nil, nil, secSummaryPacked, secDataPacked, lib.StagePreDataroom,
			"", "", "",
			1, nil, nil, 1,
			now, now, actorID,
		)

		// Create request entries under this section (depth=3)
		for reqIdx, item := range sectionItems[secName] {
			entryID := uuid.New().String()

			summary := item.description
			if len(summary) > 120 {
				summary = summary[:120]
			}

			// Normalize priority
			priority := item.priority
			switch strings.ToLower(priority) {
			case "critical", "urgent":
				priority = "critical"
			case "high":
				priority = "high"
			case "low", "optional", "nice":
				priority = "low"
			default:
				priority = "medium"
			}

			reqData := lib.RequestData{
				Title:       item.description,
				ItemNumber:  item.itemNumber,
				Section:     secName,
				Description: item.description,
				Priority:    priority,
				Status:      "open",
			}
			dataJSON, _ := json.Marshal(reqData)

			summaryPacked, err := lib.Pack(projectKey, summary)
			if err != nil {
				skipped++
				continue
			}
			dataPacked, err := lib.Pack(projectKey, string(dataJSON))
			if err != nil {
				skipped++
				continue
			}

			_, err = h.DB.Conn.Exec(
				`INSERT INTO entries (entry_id, project_id, parent_id, type, depth, sort_order,
				  search_key, search_key2, summary, data, stage,
				  assignee_id, return_to_id, origin_id,
				  version, deleted_at, deleted_by, key_version,
				  created_at, updated_at, created_by)
				 VALUES (?,?,?,?,?,?, ?,?,?,?,?, ?,?,?, ?,?,?,?, ?,?,?)`,
				entryID, projectID, sectionID, lib.TypeRequest, 3, (reqIdx+1)*1000,
				nil, nil, summaryPacked, dataPacked, lib.StagePreDataroom,
				"", "", "",
				1, nil, nil, 1,
				now, now, actorID,
			)
			if err != nil {
				log.Printf("Failed to insert request: %v", err)
				skipped++
				continue
			}
			imported++
		}
	}

	log.Printf("[import] list=%q, total rows: %d, header row: %d, imported: %d, skipped: %d, sections: %v",
		listName, len(rows), headerRowIdx, imported, skipped, sectionOrder)

	JSONResponse(w, http.StatusOK, map[string]any{
		"imported":        imported,
		"skipped":         skipped,
		"sections":        sectionOrder,
		"request_list_id": requestListID,
	})
}

// ---------------------------------------------------------------------------
// Tree API endpoints
// ---------------------------------------------------------------------------

// ListRequestTree handles GET /api/projects/{projectID}/requests/tree
// Returns all request_list, section, and request entries in DFS tree order.
func (h *Handlers) ListRequestTree(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	rows, err := h.DB.Conn.Query(
		`SELECT entry_id, project_id, parent_id, type, depth, sort_order,
		        search_key, search_key2, summary, data, stage,
		        assignee_id, return_to_id, origin_id,
		        version, deleted_at, deleted_by, key_version,
		        created_at, updated_at, created_by
		 FROM entries
		 WHERE project_id = ? AND type IN ('request_list','section','request') AND deleted_at IS NULL
		 ORDER BY sort_order ASC, created_at ASC`, projectID,
	)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list request tree")
		return
	}
	defer rows.Close()

	projectKey, _ := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)

	// Collect all entries
	type treeEntry struct {
		EntryID   string `json:"entry_id"`
		ParentID  string `json:"parent_id"`
		Type      string `json:"type"`
		Depth     int    `json:"depth"`
		SortOrder int    `json:"sort_order"`
		Version   int    `json:"version"`
		CreatedAt int64  `json:"created_at"`
		Data      any    `json:"data"`
	}

	var all []treeEntry
	byID := map[string]*treeEntry{}
	childrenOf := map[string][]string{} // parent_id → [entry_ids]

	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			continue
		}

		te := treeEntry{
			EntryID:   e.EntryID,
			ParentID:  e.ParentID,
			Type:      e.Type,
			Depth:     e.Depth,
			SortOrder: e.SortOrder,
			Version:   e.Version,
			CreatedAt: e.CreatedAt,
		}

		// Decrypt data
		if len(e.Data) > 0 {
			dataText, err := lib.Unpack(projectKey, e.Data)
			if err == nil {
				var parsed any
				if json.Unmarshal([]byte(dataText), &parsed) == nil {
					te.Data = parsed
				}
			}
		}

		all = append(all, te)
		byID[te.EntryID] = &all[len(all)-1]
		childrenOf[te.ParentID] = append(childrenOf[te.ParentID], te.EntryID)
	}

	// Get answer link counts
	linkCounts, _ := lib.AnswerLinkCountsByProject(h.DB, projectID)

	// DFS to produce tree order
	type treeItem struct {
		EntryID       string `json:"entry_id"`
		ParentID      string `json:"parent_id"`
		Type          string `json:"type"`
		Depth         int    `json:"depth"`
		SortOrder     int    `json:"sort_order"`
		Version       int    `json:"version"`
		CreatedAt     int64  `json:"created_at"`
		Data          any    `json:"data"`
		AnswerCount   int    `json:"answer_count"`
		ChildrenCount int    `json:"children_count"`
	}

	var result []treeItem
	var dfs func(parentID string)
	dfs = func(parentID string) {
		children := childrenOf[parentID]
		for _, cid := range children {
			te := byID[cid]
			if te == nil {
				continue
			}
			item := treeItem{
				EntryID:       te.EntryID,
				ParentID:      te.ParentID,
				Type:          te.Type,
				Depth:         te.Depth,
				SortOrder:     te.SortOrder,
				Version:       te.Version,
				CreatedAt:     te.CreatedAt,
				Data:          te.Data,
				AnswerCount:   linkCounts[te.EntryID],
				ChildrenCount: len(childrenOf[te.EntryID]),
			}
			result = append(result, item)
			dfs(te.EntryID)
		}
	}

	// Start DFS from project (request_lists have parent=projectID)
	dfs(projectID)

	if result == nil {
		result = []treeItem{}
	}

	JSONResponse(w, http.StatusOK, result)
}

// MoveEntry handles POST /api/projects/{projectID}/entries/{entryID}/move
// Body: {"parent_id": "...", "position": 0}
func (h *Handlers) MoveEntry(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	entryID := chi.URLParam(r, "entryID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	var req struct {
		ParentID string `json:"parent_id"`
		Position int    `json:"position"` // 0-based position among siblings
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "Invalid request body")
		return
	}

	// Get the entry being moved
	entry, err := lib.EntryByID(h.DB, h.Cfg, entryID)
	if err != nil || entry == nil {
		ErrorResponse(w, http.StatusNotFound, "not_found", "Entry not found")
		return
	}
	if entry.ProjectID != projectID {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Entry not in project")
		return
	}

	// Get new parent to determine depth
	newDepth := 1
	if req.ParentID != projectID {
		parent, err := lib.EntryByID(h.DB, h.Cfg, req.ParentID)
		if err != nil || parent == nil {
			ErrorResponse(w, http.StatusBadRequest, "invalid_parent", "Parent not found")
			return
		}
		newDepth = parent.Depth + 1
	}

	oldParentID := entry.ParentID

	// Assign sort_order: position * 1000
	sortOrder := (req.Position + 1) * 1000

	// Move the entry
	if err := lib.EntryMoveSort(h.DB, entryID, req.ParentID, newDepth, sortOrder); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to move entry")
		return
	}

	// Renumber siblings at new parent
	lib.RenumberSiblings(h.DB, req.ParentID)

	// Renumber siblings at old parent if different
	if oldParentID != req.ParentID {
		lib.RenumberSiblings(h.DB, oldParentID)
	}

	// Update depth of all descendants recursively
	h.updateDescendantDepths(entryID, newDepth)

	JSONResponse(w, http.StatusOK, map[string]string{"status": "moved"})
}

// updateDescendantDepths recursively updates depth of children.
func (h *Handlers) updateDescendantDepths(parentID string, parentDepth int) {
	rows, err := h.DB.Conn.Query(
		`SELECT entry_id FROM entries WHERE parent_id = ? AND deleted_at IS NULL`, parentID,
	)
	if err != nil {
		return
	}
	defer rows.Close()

	var ids []string
	for rows.Next() {
		var id string
		rows.Scan(&id)
		ids = append(ids, id)
	}

	childDepth := parentDepth + 1
	for _, id := range ids {
		h.DB.Conn.Exec(`UPDATE entries SET depth = ? WHERE entry_id = ?`, childDepth, id)
		h.updateDescendantDepths(id, childDepth)
	}
}

// ListAnswerLinks handles GET /api/projects/{projectID}/requests/{requestID}/links
func (h *Handlers) ListAnswerLinks(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	requestID := chi.URLParam(r, "requestID")

	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	links, err := lib.AnswerLinksByRequest(h.DB, requestID)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list answer links")
		return
	}

	// Enrich with answer entry data
	projectKey, _ := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)

	type LinkItem struct {
		AnswerID  string `json:"answer_id"`
		RequestID string `json:"request_id"`
		LinkedAt  int64  `json:"linked_at"`
		Status    string `json:"status"`
		Data      any    `json:"data"`
	}

	var result []LinkItem
	for _, l := range links {
		item := LinkItem{
			AnswerID:  l.AnswerID,
			RequestID: l.RequestID,
			LinkedAt:  l.LinkedAt,
			Status:    l.Status,
		}
		// Get answer entry data
		answerEntry, err := lib.EntryByID(h.DB, h.Cfg, l.AnswerID)
		if err == nil && answerEntry != nil && answerEntry.DataText != "" {
			var parsed any
			if json.Unmarshal([]byte(answerEntry.DataText), &parsed) == nil {
				item.Data = parsed
			}
		} else if err == nil && answerEntry != nil && len(answerEntry.Data) > 0 {
			dataText, err := lib.Unpack(projectKey, answerEntry.Data)
			if err == nil {
				var parsed any
				if json.Unmarshal([]byte(dataText), &parsed) == nil {
					item.Data = parsed
				}
			}
		}
		result = append(result, item)
	}

	if result == nil {
		result = []LinkItem{}
	}
	JSONResponse(w, http.StatusOK, result)
}

// CreateAnswerLink handles POST /api/projects/{projectID}/requests/{requestID}/links
func (h *Handlers) CreateAnswerLink(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	requestID := chi.URLParam(r, "requestID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	var req struct {
		AnswerID string `json:"answer_id"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil || req.AnswerID == "" {
		ErrorResponse(w, http.StatusBadRequest, "invalid_json", "answer_id required")
		return
	}

	if err := lib.AnswerLinkCreate(h.DB, req.AnswerID, requestID, actorID); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to create link")
		return
	}

	JSONResponse(w, http.StatusCreated, map[string]string{"status": "linked"})
}

// DeleteAnswerLink handles DELETE /api/projects/{projectID}/requests/{requestID}/links/{answerID}
func (h *Handlers) DeleteAnswerLink(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")
	requestID := chi.URLParam(r, "requestID")
	answerID := chi.URLParam(r, "answerID")

	if err := lib.CheckAccessWrite(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	if err := lib.AnswerLinkDelete(h.DB, answerID, requestID); err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to delete link")
		return
	}

	JSONResponse(w, http.StatusOK, map[string]string{"status": "unlinked"})
	_ = actorID // actorID checked above
}

// ListAnswers handles GET /api/projects/{projectID}/answers
// Returns all answer entries for the project, for use in the link picker.
func (h *Handlers) ListAnswers(w http.ResponseWriter, r *http.Request) {
	actorID := UserIDFromContext(r.Context())
	projectID := chi.URLParam(r, "projectID")

	if err := lib.CheckAccessRead(h.DB, actorID, projectID, ""); err != nil {
		ErrorResponse(w, http.StatusForbidden, "access_denied", "Access denied")
		return
	}

	q := r.URL.Query().Get("q")

	rows, err := h.DB.Conn.Query(
		`SELECT entry_id, project_id, parent_id, type, depth, sort_order,
		        search_key, search_key2, summary, data, stage,
		        assignee_id, return_to_id, origin_id,
		        version, deleted_at, deleted_by, key_version,
		        created_at, updated_at, created_by
		 FROM entries WHERE project_id = ? AND type = 'answer' AND deleted_at IS NULL
		 ORDER BY created_at DESC`, projectID,
	)
	if err != nil {
		ErrorResponse(w, http.StatusInternalServerError, "internal", "Failed to list answers")
		return
	}
	defer rows.Close()

	projectKey, _ := lib.DeriveProjectKey(h.Cfg.MasterKey, projectID)

	type AnswerItem struct {
		EntryID   string `json:"entry_id"`
		CreatedAt int64  `json:"created_at"`
		Data      any    `json:"data"`
	}

	var result []AnswerItem
	for rows.Next() {
		var e lib.Entry
		err := rows.Scan(
			&e.EntryID, &e.ProjectID, &e.ParentID, &e.Type, &e.Depth, &e.SortOrder,
			&e.SearchKey, &e.SearchKey2, &e.Summary, &e.Data, &e.Stage,
			&e.AssigneeID, &e.ReturnToID, &e.OriginID,
			&e.Version, &e.DeletedAt, &e.DeletedBy, &e.KeyVersion,
			&e.CreatedAt, &e.UpdatedAt, &e.CreatedBy,
		)
		if err != nil {
			continue
		}

		item := AnswerItem{
			EntryID:   e.EntryID,
			CreatedAt: e.CreatedAt,
		}

		if len(e.Data) > 0 {
			dataText, err := lib.Unpack(projectKey, e.Data)
			if err == nil {
				var parsed any
				if json.Unmarshal([]byte(dataText), &parsed) == nil {
					item.Data = parsed
					// Filter by search query
					if q != "" && !strings.Contains(strings.ToLower(dataText), strings.ToLower(q)) {
						continue
					}
				}
			}
		}

		result = append(result, item)
	}

	if result == nil {
		result = []AnswerItem{}
	}
	JSONResponse(w, http.StatusOK, result)
}

// containsAny checks if s contains any of the given substrings
func containsAny(s string, subs ...string) bool {
	for _, sub := range subs {
		if strings.Contains(s, sub) {
			return true
		}
	}
	return false
}