package main

import (
	"encoding/json"
	"net/http"
	"time"

	"inou/lib"
)

type DossierResponse struct {
	ID           string `json:"id"`
	Name         string `json:"name"`
	DOB          string `json:"dob"`
	Found        bool   `json:"found"`
	WeightUnit   string `json:"weight_unit,omitempty"`
	HeightUnit   string `json:"height_unit,omitempty"`
	IsProvider   bool   `json:"is_provider,omitempty"`
	ProviderName string `json:"provider_name,omitempty"`
	AwayEnabled  bool   `json:"away_enabled,omitempty"`
	AwayMessage  string `json:"away_message,omitempty"`
}

type DossierCreateRequest struct {
	EmailHash string `json:"email_hash"`
	Email     string `json:"email"`
	InvitedBy string `json:"invited_by"`
}

func handleDossier(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")

	if r.Method == "POST" {
		handleDossierCreate(w, r)
		return
	}

	dossierHex := r.URL.Query().Get("dossier")
	emailHash := r.URL.Query().Get("email_hash")
	first := r.URL.Query().Get("first")

	var d *lib.Dossier
	var err error

	// Note: This is the login/registration endpoint, uses nil ctx
	if dossierHex != "" {
		d, err = lib.DossierGet(nil, dossierHex)
	} else if emailHash != "" {
		d, err = lib.DossierGetByEmailHash(nil, emailHash)
	} else if first == "1" {
		d, err = lib.DossierGetFirst(nil)
	} else {
		http.Error(w, "dossier, email_hash, or first parameter required", http.StatusBadRequest)
		return
	}

	if err != nil || d == nil {
		json.NewEncoder(w).Encode(DossierResponse{Found: false})
		return
	}

	json.NewEncoder(w).Encode(DossierResponse{
		ID:           d.DossierID,
		Name:         d.Name,
		DOB:          d.DateOfBirth,
		Found:        true,
		WeightUnit:   d.WeightUnit,
		HeightUnit:   d.HeightUnit,
		IsProvider:   d.IsProvider,
		ProviderName: d.ProviderName,
		AwayEnabled:  d.AwayEnabled,
		AwayMessage:  d.AwayMessage,
	})
}

func handleDossierCreate(w http.ResponseWriter, r *http.Request) {
	var req DossierCreateRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "invalid request", http.StatusBadRequest)
		return
	}

	if req.EmailHash == "" {
		http.Error(w, "email_hash required", http.StatusBadRequest)
		return
	}

	// Check if already exists (nil ctx - registration endpoint)
	existing, err := lib.DossierGetByEmailHash(nil, req.EmailHash)
	if err == nil && existing != nil {
		json.NewEncoder(w).Encode(map[string]interface{}{
			"id":     existing.DossierID,
			"exists": true,
		})
		return
	}

	// Create new dossier
	d := &lib.Dossier{
		EmailHash: req.EmailHash,
		Email:     req.Email,
		CreatedAt: time.Now().Unix(),
	}
	if req.InvitedBy != "" {
		d.InvitedByDossierID = req.InvitedBy
	}

	if err := lib.DossierWrite(nil, d); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(map[string]interface{}{
		"id":     d.DossierID,
		"exists": false,
	})
}