package lib

import (
	"fmt"
	"time"
)

// Broadcast logic — answer published → notify all linked requesters.
// Uses the broadcasts table for idempotency.

// NotifyAnswerPublished broadcasts a published answer to all linked requesters. Stub.
func NotifyAnswerPublished(db *DB, cfg *Config, answerID string) error {
	// TODO: implementation steps:
	// 1. Query answer_links WHERE answer_id = ? AND status = 'confirmed'
	// 2. For each linked request, find the origin_id (buyer)
	// 3. Check broadcasts table for idempotency
	// 4. Send notification (email, in-app, etc.)
	// 5. Record in broadcasts table
	return nil
}

// NotifyTaskAssigned notifies a user that a task has been assigned to them. Stub.
func NotifyTaskAssigned(db *DB, cfg *Config, entryID, assigneeID string) error {
	// TODO: implement notification
	return nil
}

// NotifyChainComplete fires when a routing chain completes back to origin. Stub.
func NotifyChainComplete(db *DB, cfg *Config, entryID string) error {
	// TODO: implement chain completion notification
	return nil
}

// ---- Email Notification Functions ----

// NotifyInvite sends an invitation email to a new user.
func NotifyInvite(m *Mailer, to, inviterName, inviterOrg, projectName, inviteURL string) error {
	if !m.Enabled() {
		return nil
	}

	subject := fmt.Sprintf("You've been invited to join %s on Dealspace", projectName)
	data := InviteData{
		InviterName: inviterName,
		InviterOrg:  inviterOrg,
		ProjectName: projectName,
		InviteURL:   inviteURL,
		ExpiresIn:   "7 days",
	}

	return m.SendTemplate(to, subject, "invite.html", data)
}

// NotifyTasksAssigned sends an email when new tasks are assigned to a user.
func NotifyTasksAssigned(m *Mailer, to, projectName string, tasks []string) error {
	if !m.Enabled() {
		return nil
	}

	count := len(tasks)
	var subject string
	if count == 1 {
		subject = fmt.Sprintf("You have 1 new task on %s", projectName)
	} else {
		subject = fmt.Sprintf("You have %d new tasks on %s", count, projectName)
	}

	// Convert task strings to TaskItem (simplified — in real usage, you'd pass full task data)
	taskItems := make([]TaskItem, 0, len(tasks))
	for _, t := range tasks {
		taskItems = append(taskItems, TaskItem{
			Title: t,
		})
	}

	data := TasksAssignedData{
		ProjectName: projectName,
		Count:       count,
		Tasks:       taskItems,
		TasksURL:    "https://app.muskepo.com/app/tasks",
	}

	return m.SendTemplate(to, subject, "tasks_assigned.html", data)
}

// NotifyAnswerSubmitted notifies an IB member that a seller submitted an answer.
func NotifyAnswerSubmitted(m *Mailer, to, answererName, requestTitle, wsName, reviewURL string) error {
	if !m.Enabled() {
		return nil
	}

	subject := fmt.Sprintf("%s submitted an answer for: %s", answererName, requestTitle)
	data := AnswerSubmittedData{
		AnswererName:   answererName,
		RequestTitle:   requestTitle,
		WorkstreamName: wsName,
		ReviewURL:      reviewURL,
	}

	return m.SendTemplate(to, subject, "answer_submitted.html", data)
}

// NotifyAnswerApproved notifies a seller that their answer was approved.
func NotifyAnswerApproved(m *Mailer, to, requestTitle string, published bool) error {
	if !m.Enabled() {
		return nil
	}

	subject := "Your answer was approved ✓"
	data := AnswerApprovedData{
		RequestTitle: requestTitle,
		Published:    published,
	}

	return m.SendTemplate(to, subject, "answer_approved.html", data)
}

// NotifyAnswerRejected notifies a seller that their answer was rejected.
func NotifyAnswerRejected(m *Mailer, to, requestTitle, reason, requestURL string) error {
	if !m.Enabled() {
		return nil
	}

	subject := "Your answer needs revision"
	data := AnswerRejectedData{
		RequestTitle: requestTitle,
		Reason:       reason,
		RequestURL:   requestURL,
	}

	return m.SendTemplate(to, subject, "answer_rejected.html", data)
}

// NotifyRequestForwarded notifies a user that a request was forwarded to them.
func NotifyRequestForwarded(m *Mailer, to, senderName, requestTitle, requestURL string, dueAt *time.Time) error {
	if !m.Enabled() {
		return nil
	}

	subject := fmt.Sprintf("%s forwarded a request to you: %s", senderName, requestTitle)
	data := RequestForwardedData{
		SenderName:   senderName,
		RequestTitle: requestTitle,
		RequestURL:   requestURL,
		HasDueDate:   dueAt != nil,
	}

	if dueAt != nil {
		data.DueDate = dueAt.Format("January 2, 2006")
	}

	return m.SendTemplate(to, subject, "request_forwarded.html", data)
}

// NotifyWelcome sends a welcome email to a new user after accepting an invite.
func NotifyWelcome(m *Mailer, to, name, tasksURL string) error {
	if !m.Enabled() {
		return nil
	}

	subject := "Welcome to Dealspace"
	data := WelcomeData{
		RecipientName: name,
		TasksURL:      tasksURL,
	}

	return m.SendTemplate(to, subject, "welcome.html", data)
}