package handlers

import (
	"context"
	"encoding/json"
	"fmt"
	"html/template"
	"log"
	"net/http"
	"path/filepath"
	"sort"
	"strings"
	"sync"
	"time"

	"task-dashboard/internal/api"
	"task-dashboard/internal/auth"
	"task-dashboard/internal/config"
	"task-dashboard/internal/models"
	"task-dashboard/internal/store"
)

// Handler holds dependencies for HTTP handlers
type Handler struct {
	store                *store.Store
	todoistClient        api.TodoistAPI
	trelloClient         api.TrelloAPI
	planToEatClient      api.PlanToEatAPI
	googleCalendarClient api.GoogleCalendarAPI
	config               *config.Config
	templates            *template.Template
}

// New creates a new Handler instance
func New(s *store.Store, todoist api.TodoistAPI, trello api.TrelloAPI, planToEat api.PlanToEatAPI, googleCalendar api.GoogleCalendarAPI, cfg *config.Config) *Handler {
	// Parse templates including partials
	tmpl, err := template.ParseGlob(filepath.Join(cfg.TemplateDir, "*.html"))
	if err != nil {
		log.Printf("Warning: failed to parse templates: %v", err)
	}

	// Also parse partials
	tmpl, err = tmpl.ParseGlob(filepath.Join(cfg.TemplateDir, "partials", "*.html"))
	if err != nil {
		log.Printf("Warning: failed to parse partial templates: %v", err)
	}

	return &Handler{
		store:                s,
		todoistClient:        todoist,
		trelloClient:         trello,
		planToEatClient:      planToEat,
		googleCalendarClient: googleCalendar,
		config:               cfg,
		templates:            tmpl,
	}
}

// HandleDashboard renders the main dashboard view
func (h *Handler) HandleDashboard(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Extract tab query parameter for state persistence
	tab := r.URL.Query().Get("tab")
	if tab == "" {
		tab = "tasks"
	}

	// Aggregate data from all sources
	dashboardData, err := h.aggregateData(ctx, false)
	if err != nil {
		http.Error(w, "Failed to load dashboard data", http.StatusInternalServerError)
		log.Printf("Error aggregating data: %v", err)
		return
	}

	// Render template
	if h.templates == nil {
		http.Error(w, "Templates not loaded", http.StatusInternalServerError)
		return
	}

	// Generate random background URL (Lorem Picsum - CORS-friendly)
	// Add random seed to get different image each load
	backgroundURL := fmt.Sprintf("https://picsum.photos/1920/1080?random=%d", time.Now().UnixNano())

	// Wrap dashboard data with active tab for template
	data := struct {
		*models.DashboardData
		ActiveTab     string
		CSRFToken     string
		BackgroundURL string
	}{
		DashboardData: dashboardData,
		ActiveTab:     tab,
		CSRFToken:     auth.GetCSRFTokenFromContext(ctx),
		BackgroundURL: backgroundURL,
	}

	if err := h.templates.ExecuteTemplate(w, "index.html", data); err != nil {
		http.Error(w, "Failed to render template", http.StatusInternalServerError)
		log.Printf("Error rendering template: %v", err)
	}
}

// HandleRefresh forces a refresh of all data
func (h *Handler) HandleRefresh(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Force refresh by passing true
	data, err := h.aggregateData(ctx, true)
	if err != nil {
		http.Error(w, "Failed to refresh data", http.StatusInternalServerError)
		log.Printf("Error refreshing data: %v", err)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(data)
}

// HandleGetTasks returns tasks as JSON
func (h *Handler) HandleGetTasks(w http.ResponseWriter, r *http.Request) {
	tasks, err := h.store.GetTasks()
	if err != nil {
		http.Error(w, "Failed to get tasks", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(tasks)
}

// HandleGetMeals returns meals as JSON
func (h *Handler) HandleGetMeals(w http.ResponseWriter, r *http.Request) {
	startDate := time.Now()
	endDate := startDate.AddDate(0, 0, 7)

	meals, err := h.store.GetMeals(startDate, endDate)
	if err != nil {
		http.Error(w, "Failed to get meals", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(meals)
}

// HandleGetBoards returns Trello boards with cards as JSON
func (h *Handler) HandleGetBoards(w http.ResponseWriter, r *http.Request) {
	boards, err := h.store.GetBoards()
	if err != nil {
		http.Error(w, "Failed to get boards", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(boards)
}

// HandleTasksTab renders the tasks tab content (Trello + Todoist + PlanToEat)
func (h *Handler) HandleTasksTab(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	data, err := h.aggregateData(ctx, false)
	if err != nil {
		http.Error(w, "Failed to load tasks", http.StatusInternalServerError)
		log.Printf("Error loading tasks tab: %v", err)
		return
	}

	if err := h.templates.ExecuteTemplate(w, "tasks-tab", data); err != nil {
		http.Error(w, "Failed to render template", http.StatusInternalServerError)
		log.Printf("Error rendering tasks tab: %v", err)
	}
}

// HandleRefreshTab refreshes and re-renders the specified tab
func (h *Handler) HandleRefreshTab(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Force refresh
	data, err := h.aggregateData(ctx, true)
	if err != nil {
		http.Error(w, "Failed to refresh", http.StatusInternalServerError)
		log.Printf("Error refreshing tab: %v", err)
		return
	}

	if err := h.templates.ExecuteTemplate(w, "tasks-tab", data); err != nil {
		http.Error(w, "Failed to render template", http.StatusInternalServerError)
		log.Printf("Error rendering refreshed tab: %v", err)
	}
}

// aggregateData fetches and caches data from all sources
func (h *Handler) aggregateData(ctx context.Context, forceRefresh bool) (*models.DashboardData, error) {
	data := &models.DashboardData{
		LastUpdated: time.Now(),
		Errors:      make([]string, 0),
	}

	var wg sync.WaitGroup
	var mu sync.Mutex

	// Fetch Trello boards (PRIORITY - most important)
	wg.Add(1)
	go func() {
		defer wg.Done()
		boards, err := h.fetchBoards(ctx, forceRefresh)
		mu.Lock()
		defer mu.Unlock()
		if err != nil {
			data.Errors = append(data.Errors, "Trello: "+err.Error())
		} else {
			data.Boards = boards
		}
	}()

	// Fetch Todoist tasks
	wg.Add(1)
	go func() {
		defer wg.Done()
		tasks, err := h.fetchTasks(ctx, forceRefresh)
		mu.Lock()
		defer mu.Unlock()
		if err != nil {
			data.Errors = append(data.Errors, "Todoist: "+err.Error())
		} else {
			// Sort tasks: earliest due date first, nil last, then by priority (descending)
			sort.Slice(tasks, func(i, j int) bool {
				// Handle nil due dates (push to end)
				if tasks[i].DueDate == nil && tasks[j].DueDate != nil {
					return false
				}
				if tasks[i].DueDate != nil && tasks[j].DueDate == nil {
					return true
				}

				// Both have due dates, sort by date
				if tasks[i].DueDate != nil && tasks[j].DueDate != nil {
					if !tasks[i].DueDate.Equal(*tasks[j].DueDate) {
						return tasks[i].DueDate.Before(*tasks[j].DueDate)
					}
				}

				// Same due date (or both nil), sort by priority (descending)
				return tasks[i].Priority > tasks[j].Priority
			})
			data.Tasks = tasks
		}
	}()

	// Fetch Todoist projects
	wg.Add(1)
	go func() {
		defer wg.Done()
		projects, err := h.todoistClient.GetProjects(ctx)
		mu.Lock()
		defer mu.Unlock()
		if err != nil {
			log.Printf("Failed to fetch projects: %v", err)
		} else {
			data.Projects = projects
		}
	}()

	// Fetch PlanToEat meals (if configured)
	if h.planToEatClient != nil {
		wg.Add(1)
		go func() {
			defer wg.Done()
			meals, err := h.fetchMeals(ctx, forceRefresh)
			mu.Lock()
			defer mu.Unlock()
			if err != nil {
				data.Errors = append(data.Errors, "PlanToEat: "+err.Error())
			} else {
				data.Meals = meals
			}
		}()
	}

	// Fetch Google Calendar events (if configured)
	if h.googleCalendarClient != nil {
		wg.Add(1)
		go func() {
			defer wg.Done()
			events, err := h.googleCalendarClient.GetUpcomingEvents(ctx, 10)
			mu.Lock()
			defer mu.Unlock()
			if err != nil {
				data.Errors = append(data.Errors, "Google Calendar: "+err.Error())
			} else {
				data.Events = events
			}
		}()
	}

	wg.Wait()

	// Filter Trello cards into tasks based on heuristic
	var trelloTasks []models.Card
	for _, board := range data.Boards {
		for _, card := range board.Cards {
			listNameLower := strings.ToLower(card.ListName)
			isTask := card.DueDate != nil ||
				strings.Contains(listNameLower, "todo") ||
				strings.Contains(listNameLower, "doing") ||
				strings.Contains(listNameLower, "progress") ||
				strings.Contains(listNameLower, "task")

			if isTask {
				trelloTasks = append(trelloTasks, card)
			}
		}
	}

	// Sort trelloTasks: earliest due date first, nil last, then by board name
	sort.Slice(trelloTasks, func(i, j int) bool {
		// Both have due dates: compare dates
		if trelloTasks[i].DueDate != nil && trelloTasks[j].DueDate != nil {
			if !trelloTasks[i].DueDate.Equal(*trelloTasks[j].DueDate) {
				return trelloTasks[i].DueDate.Before(*trelloTasks[j].DueDate)
			}
			// Same due date, fall through to board name comparison
		}

		// Only one has due date: that one comes first
		if trelloTasks[i].DueDate != nil && trelloTasks[j].DueDate == nil {
			return true
		}
		if trelloTasks[i].DueDate == nil && trelloTasks[j].DueDate != nil {
			return false
		}

		// Both nil or same due date: sort by board name
		return trelloTasks[i].BoardName < trelloTasks[j].BoardName
	})

	data.TrelloTasks = trelloTasks

	return data, nil
}

// fetchTasks fetches tasks from cache or API using incremental sync
func (h *Handler) fetchTasks(ctx context.Context, forceRefresh bool) ([]models.Task, error) {
	cacheKey := store.CacheKeyTodoistTasks
	syncService := "todoist"

	// Check cache validity
	if !forceRefresh {
		valid, err := h.store.IsCacheValid(cacheKey)
		if err == nil && valid {
			return h.store.GetTasks()
		}
	}

	// Get stored sync token (empty string means full sync)
	syncToken, err := h.store.GetSyncToken(syncService)
	if err != nil {
		log.Printf("Failed to get sync token, will do full sync: %v", err)
		syncToken = ""
	}

	// Force full sync if requested
	if forceRefresh {
		syncToken = ""
	}

	// Fetch using Sync API
	syncResp, err := h.todoistClient.Sync(ctx, syncToken)
	if err != nil {
		// Try to return cached data even if stale
		cachedTasks, cacheErr := h.store.GetTasks()
		if cacheErr == nil && len(cachedTasks) > 0 {
			return cachedTasks, nil
		}
		return nil, err
	}

	// Build project map from sync response
	projectMap := api.BuildProjectMapFromSync(syncResp.Projects)

	// Process sync response
	if syncResp.FullSync {
		// Full sync: replace all tasks
		tasks := api.ConvertSyncItemsToTasks(syncResp.Items, projectMap)
		if err := h.store.SaveTasks(tasks); err != nil {
			log.Printf("Failed to save tasks to cache: %v", err)
		}
	} else {
		// Incremental sync: merge changes
		var deletedIDs []string
		for _, item := range syncResp.Items {
			if item.IsDeleted || item.IsCompleted {
				deletedIDs = append(deletedIDs, item.ID)
			} else {
				// Upsert active task
				task := h.convertSyncItemToTask(item, projectMap)
				if err := h.store.UpsertTask(task); err != nil {
					log.Printf("Failed to upsert task %s: %v", item.ID, err)
				}
			}
		}
		// Delete removed tasks
		if len(deletedIDs) > 0 {
			if err := h.store.DeleteTasksByIDs(deletedIDs); err != nil {
				log.Printf("Failed to delete tasks: %v", err)
			}
		}
	}

	// Store the new sync token
	if err := h.store.SetSyncToken(syncService, syncResp.SyncToken); err != nil {
		log.Printf("Failed to save sync token: %v", err)
	}

	// Update cache metadata
	if err := h.store.UpdateCacheMetadata(cacheKey, h.config.CacheTTLMinutes); err != nil {
		log.Printf("Failed to update cache metadata: %v", err)
	}

	return h.store.GetTasks()
}

// convertSyncItemToTask converts a sync item to a Task model
func (h *Handler) convertSyncItemToTask(item api.SyncItemResponse, projectMap map[string]string) models.Task {
	task := models.Task{
		ID:          item.ID,
		Content:     item.Content,
		Description: item.Description,
		ProjectID:   item.ProjectID,
		ProjectName: projectMap[item.ProjectID],
		Priority:    item.Priority,
		Completed:   false,
		Labels:      item.Labels,
		URL:         fmt.Sprintf("https://todoist.com/app/task/%s", item.ID),
	}

	if item.AddedAt != "" {
		if createdAt, err := time.Parse(time.RFC3339, item.AddedAt); err == nil {
			task.CreatedAt = createdAt
		}
	}

	if item.Due != nil {
		var dueDate time.Time
		var err error
		if item.Due.Datetime != "" {
			dueDate, err = time.Parse(time.RFC3339, item.Due.Datetime)
		} else if item.Due.Date != "" {
			dueDate, err = time.Parse("2006-01-02", item.Due.Date)
		}
		if err == nil {
			task.DueDate = &dueDate
		}
	}

	return task
}

// fetchMeals fetches meals from cache or API
func (h *Handler) fetchMeals(ctx context.Context, forceRefresh bool) ([]models.Meal, error) {
	cacheKey := store.CacheKeyPlanToEatMeals

	// Check cache validity
	if !forceRefresh {
		valid, err := h.store.IsCacheValid(cacheKey)
		if err == nil && valid {
			startDate := time.Now()
			endDate := startDate.AddDate(0, 0, 7)
			return h.store.GetMeals(startDate, endDate)
		}
	}

	// Fetch from API
	meals, err := h.planToEatClient.GetUpcomingMeals(ctx, 7)
	if err != nil {
		// Try to return cached data even if stale
		startDate := time.Now()
		endDate := startDate.AddDate(0, 0, 7)
		cachedMeals, cacheErr := h.store.GetMeals(startDate, endDate)
		if cacheErr == nil && len(cachedMeals) > 0 {
			return cachedMeals, nil
		}
		return nil, err
	}

	// Save to cache
	if err := h.store.SaveMeals(meals); err != nil {
		log.Printf("Failed to save meals to cache: %v", err)
	}

	// Update cache metadata
	if err := h.store.UpdateCacheMetadata(cacheKey, h.config.CacheTTLMinutes); err != nil {
		log.Printf("Failed to update cache metadata: %v", err)
	}

	return meals, nil
}

// fetchBoards fetches Trello boards from cache or API
func (h *Handler) fetchBoards(ctx context.Context, forceRefresh bool) ([]models.Board, error) {
	cacheKey := store.CacheKeyTrelloBoards

	// Check cache validity
	if !forceRefresh {
		valid, err := h.store.IsCacheValid(cacheKey)
		if err == nil && valid {
			return h.store.GetBoards()
		}
	}

	// Fetch from API
	boards, err := h.trelloClient.GetBoardsWithCards(ctx)
	if err != nil {
		// Try to return cached data even if stale
		cachedBoards, cacheErr := h.store.GetBoards()
		if cacheErr == nil && len(cachedBoards) > 0 {
			return cachedBoards, nil
		}
		return nil, err
	}

	// Debug: log what we got from API
	totalCards := 0
	for _, b := range boards {
		totalCards += len(b.Cards)
		if len(b.Cards) > 0 {
			log.Printf("Trello API: Board %q has %d cards", b.Name, len(b.Cards))
		}
	}
	log.Printf("Trello API: Fetched %d boards with %d total cards", len(boards), totalCards)

	// Save to cache
	if err := h.store.SaveBoards(boards); err != nil {
		log.Printf("Failed to save boards to cache: %v", err)
	}

	// Update cache metadata
	if err := h.store.UpdateCacheMetadata(cacheKey, h.config.CacheTTLMinutes); err != nil {
		log.Printf("Failed to update cache metadata: %v", err)
	}

	return boards, nil
}

// HandleCreateCard creates a new Trello card
func (h *Handler) HandleCreateCard(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Parse form data
	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		log.Printf("Error parsing form: %v", err)
		return
	}

	boardID := r.FormValue("board_id")
	listID := r.FormValue("list_id")
	name := r.FormValue("name")

	if boardID == "" || listID == "" || name == "" {
		http.Error(w, "Missing required fields", http.StatusBadRequest)
		return
	}

	// Create the card
	_, err := h.trelloClient.CreateCard(ctx, listID, name, "", nil)
	if err != nil {
		http.Error(w, "Failed to create card", http.StatusInternalServerError)
		log.Printf("Error creating card: %v", err)
		return
	}

	// Force refresh to get updated data
	data, err := h.aggregateData(ctx, true)
	if err != nil {
		http.Error(w, "Failed to refresh data", http.StatusInternalServerError)
		log.Printf("Error refreshing data: %v", err)
		return
	}

	// Find the specific board
	var targetBoard *models.Board
	for i := range data.Boards {
		if data.Boards[i].ID == boardID {
			targetBoard = &data.Boards[i]
			break
		}
	}

	if targetBoard == nil {
		http.Error(w, "Board not found", http.StatusNotFound)
		return
	}

	// Render the updated board
	if err := h.templates.ExecuteTemplate(w, "trello-board", targetBoard); err != nil {
		http.Error(w, "Failed to render template", http.StatusInternalServerError)
		log.Printf("Error rendering board template: %v", err)
	}
}

// HandleCompleteCard marks a Trello card as complete
func (h *Handler) HandleCompleteCard(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Parse form data
	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		log.Printf("Error parsing form: %v", err)
		return
	}

	cardID := r.FormValue("card_id")

	if cardID == "" {
		http.Error(w, "Missing card_id", http.StatusBadRequest)
		return
	}

	// Mark card as closed (complete)
	updates := map[string]interface{}{
		"closed": true,
	}

	if err := h.trelloClient.UpdateCard(ctx, cardID, updates); err != nil {
		http.Error(w, "Failed to complete card", http.StatusInternalServerError)
		log.Printf("Error completing card: %v", err)
		return
	}

	// Return empty response (card will be removed from DOM)
	w.WriteHeader(http.StatusOK)
}

// HandleCreateTask creates a new Todoist task
func (h *Handler) HandleCreateTask(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Parse form data
	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		log.Printf("Error parsing form: %v", err)
		return
	}

	content := r.FormValue("content")
	projectID := r.FormValue("project_id")

	if content == "" {
		http.Error(w, "Missing content", http.StatusBadRequest)
		return
	}

	// Create the task
	_, err := h.todoistClient.CreateTask(ctx, content, projectID, nil, 0)
	if err != nil {
		http.Error(w, "Failed to create task", http.StatusInternalServerError)
		log.Printf("Error creating task: %v", err)
		return
	}

	// Force refresh to get updated tasks
	tasks, err := h.fetchTasks(ctx, true)
	if err != nil {
		http.Error(w, "Failed to refresh tasks", http.StatusInternalServerError)
		log.Printf("Error refreshing tasks: %v", err)
		return
	}

	// Fetch projects for the dropdown
	projects, err := h.todoistClient.GetProjects(ctx)
	if err != nil {
		log.Printf("Failed to fetch projects: %v", err)
		projects = []models.Project{}
	}

	// Prepare data for template rendering
	data := struct {
		Tasks    []models.Task
		Projects []models.Project
	}{
		Tasks:    tasks,
		Projects: projects,
	}

	// Render the updated task list
	if err := h.templates.ExecuteTemplate(w, "todoist-tasks", data); err != nil {
		http.Error(w, "Failed to render template", http.StatusInternalServerError)
		log.Printf("Error rendering todoist tasks template: %v", err)
	}
}

// HandleCompleteTask marks a Todoist task as complete
func (h *Handler) HandleCompleteTask(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	// Parse form data
	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		log.Printf("Error parsing form: %v", err)
		return
	}

	taskID := r.FormValue("task_id")

	if taskID == "" {
		http.Error(w, "Missing task_id", http.StatusBadRequest)
		return
	}

	// Mark task as complete
	if err := h.todoistClient.CompleteTask(ctx, taskID); err != nil {
		http.Error(w, "Failed to complete task", http.StatusInternalServerError)
		log.Printf("Error completing task: %v", err)
		return
	}

	// Return empty response (task will be removed from DOM)
	w.WriteHeader(http.StatusOK)
}

// HandleCompleteAtom handles completion of a unified task (Atom)
func (h *Handler) HandleCompleteAtom(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		log.Printf("Error parsing form: %v", err)
		return
	}

	id := r.FormValue("id")
	source := r.FormValue("source")

	if id == "" || source == "" {
		http.Error(w, "Missing id or source", http.StatusBadRequest)
		return
	}

	var err error
	switch source {
	case "todoist":
		err = h.todoistClient.CompleteTask(ctx, id)
	case "trello":
		// Archive the card (closed = true)
		updates := map[string]interface{}{
			"closed": true,
		}
		err = h.trelloClient.UpdateCard(ctx, id, updates)
	default:
		http.Error(w, "Unknown source: "+source, http.StatusBadRequest)
		return
	}

	if err != nil {
		http.Error(w, "Failed to complete task", http.StatusInternalServerError)
		log.Printf("Error completing atom (source=%s, id=%s): %v", source, id, err)
		return
	}

	// Get task title before removing from cache
	var title string
	switch source {
	case "todoist":
		if tasks, err := h.store.GetTasks(); err == nil {
			for _, t := range tasks {
				if t.ID == id {
					title = t.Content
					break
				}
			}
		}
	case "trello":
		if boards, err := h.store.GetBoards(); err == nil {
			for _, b := range boards {
				for _, c := range b.Cards {
					if c.ID == id {
						title = c.Name
						break
					}
				}
			}
		}
	}
	if title == "" {
		title = "Task"
	}

	// Remove from local cache
	switch source {
	case "todoist":
		if err := h.store.DeleteTask(id); err != nil {
			log.Printf("Warning: failed to delete task from cache: %v", err)
		}
	case "trello":
		if err := h.store.DeleteCard(id); err != nil {
			log.Printf("Warning: failed to delete card from cache: %v", err)
		}
	}

	// Return completed task HTML (stays visible with strikethrough until refresh)
	w.Header().Set("Content-Type", "text/html")
	completedHTML := fmt.Sprintf(`<div class="task-item bg-gray-100 rounded-lg shadow-sm border-l-4 border-gray-300 opacity-60">
		<div class="flex items-start gap-2 sm:gap-3 p-3 sm:p-4">
			<input type="checkbox" checked disabled class="mt-1 h-5 w-5 rounded border-gray-300 text-green-600 cursor-not-allowed flex-shrink-0">
			<span class="text-lg flex-shrink-0">✓</span>
			<div class="flex-1 min-w-0">
				<h3 class="text-sm font-medium text-gray-400 line-through break-words">%s</h3>
				<div class="text-xs text-green-600 mt-1">Completed</div>
			</div>
		</div>
	</div>`, template.HTMLEscapeString(title))
	w.Write([]byte(completedHTML))
}

// HandleUnifiedAdd creates a task in Todoist or a card in Trello from the Quick Add form
func (h *Handler) HandleUnifiedAdd(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		return
	}

	title := r.FormValue("title")
	source := r.FormValue("source")
	dueDateStr := r.FormValue("due_date")

	if title == "" {
		http.Error(w, "Title is required", http.StatusBadRequest)
		return
	}

	// Parse due date if provided (use local timezone)
	var dueDate *time.Time
	if dueDateStr != "" {
		parsed, err := time.ParseInLocation("2006-01-02", dueDateStr, time.Local)
		if err == nil {
			dueDate = &parsed
		}
	}

	switch source {
	case "todoist":
		_, err := h.todoistClient.CreateTask(ctx, title, "", dueDate, 1)
		if err != nil {
			http.Error(w, "Failed to create Todoist task", http.StatusInternalServerError)
			log.Printf("Error creating Todoist task: %v", err)
			return
		}
		// Invalidate cache so fresh data is fetched
		h.store.InvalidateCache(store.CacheKeyTodoistTasks)

	case "trello":
		listID := r.FormValue("list_id")
		if listID == "" {
			http.Error(w, "List is required for Trello", http.StatusBadRequest)
			return
		}
		_, err := h.trelloClient.CreateCard(ctx, listID, title, "", dueDate)
		if err != nil {
			http.Error(w, "Failed to create Trello card", http.StatusInternalServerError)
			log.Printf("Error creating Trello card: %v", err)
			return
		}
		// Invalidate cache so fresh data is fetched
		h.store.InvalidateCache(store.CacheKeyTrelloBoards)

	default:
		http.Error(w, "Invalid source", http.StatusBadRequest)
		return
	}

	// Trigger a refresh of the tasks tab via HTMX
	w.Header().Set("HX-Trigger", "refresh-tasks")
	w.WriteHeader(http.StatusOK)
}

// HandleGetListsOptions returns HTML options for lists in a given board
func (h *Handler) HandleGetListsOptions(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	boardID := r.URL.Query().Get("board_id")

	if boardID == "" {
		http.Error(w, "board_id is required", http.StatusBadRequest)
		return
	}

	lists, err := h.trelloClient.GetLists(ctx, boardID)
	if err != nil {
		http.Error(w, "Failed to fetch lists", http.StatusInternalServerError)
		log.Printf("Error fetching lists for board %s: %v", boardID, err)
		return
	}

	w.Header().Set("Content-Type", "text/html")
	for _, list := range lists {
		fmt.Fprintf(w, `<option value="%s">%s</option>`, list.ID, list.Name)
	}
}

// HandleGetBugs returns the list of reported bugs
func (h *Handler) HandleGetBugs(w http.ResponseWriter, r *http.Request) {
	bugs, err := h.store.GetBugs()
	if err != nil {
		http.Error(w, "Failed to fetch bugs", http.StatusInternalServerError)
		log.Printf("Error fetching bugs: %v", err)
		return
	}

	w.Header().Set("Content-Type", "text/html")
	if len(bugs) == 0 {
		fmt.Fprint(w, `<p class="text-gray-500 text-sm">No bugs reported yet.</p>`)
		return
	}

	for _, bug := range bugs {
		fmt.Fprintf(w, `<div class="text-sm border-b border-gray-100 py-2">
			<p class="text-gray-900">%s</p>
			<p class="text-gray-400 text-xs">%s</p>
		</div>`, template.HTMLEscapeString(bug.Description), bug.CreatedAt.Format("Jan 2, 3:04 PM"))
	}
}

// HandleReportBug saves a new bug report
func (h *Handler) HandleReportBug(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		http.Error(w, "Invalid form data", http.StatusBadRequest)
		return
	}

	description := strings.TrimSpace(r.FormValue("description"))
	if description == "" {
		http.Error(w, "Description is required", http.StatusBadRequest)
		return
	}

	if err := h.store.SaveBug(description); err != nil {
		http.Error(w, "Failed to save bug", http.StatusInternalServerError)
		log.Printf("Error saving bug: %v", err)
		return
	}

	// Return updated bug list
	h.HandleGetBugs(w, r)
}

// HandleGetTaskDetail returns task details as HTML for modal
func (h *Handler) HandleGetTaskDetail(w http.ResponseWriter, r *http.Request) {
	id := r.URL.Query().Get("id")
	source := r.URL.Query().Get("source")

	if id == "" || source == "" {
		http.Error(w, "Missing id or source", http.StatusBadRequest)
		return
	}

	var title, description string
	switch source {
	case "todoist":
		tasks, err := h.store.GetTasks()
		if err == nil {
			for _, t := range tasks {
				if t.ID == id {
					title = t.Content
					description = t.Description
					break
				}
			}
		}
	case "trello":
		boards, err := h.store.GetBoards()
		if err == nil {
			for _, b := range boards {
				for _, c := range b.Cards {
					if c.ID == id {
						title = c.Name
						// Card model doesn't store description, leave empty
						description = ""
						break
					}
				}
			}
		}
	}

	w.Header().Set("Content-Type", "text/html")
	html := fmt.Sprintf(`
		<div class="p-4">
			<h3 class="font-semibold text-gray-900 mb-3">%s</h3>
			<form hx-post="/tasks/update" hx-swap="none" hx-on::after-request="if(event.detail.successful) { closeTaskModal(); htmx.trigger(document.body, 'refresh-tasks'); }">
				<input type="hidden" name="id" value="%s">
				<input type="hidden" name="source" value="%s">
				<label class="block text-sm font-medium text-gray-700 mb-1">Description</label>
				<textarea name="description" class="w-full border border-gray-300 rounded-lg px-3 py-2 text-sm mb-3 h-32">%s</textarea>
				<button type="submit" class="w-full bg-primary-600 hover:bg-primary-700 text-white px-4 py-2 rounded-lg text-sm font-medium">Save</button>
			</form>
		</div>
	`, template.HTMLEscapeString(title), template.HTMLEscapeString(id), template.HTMLEscapeString(source), template.HTMLEscapeString(description))
	w.Write([]byte(html))
}

// HandleGetShoppingLists returns the lists from the Shopping board for quick-add
func (h *Handler) HandleGetShoppingLists(w http.ResponseWriter, r *http.Request) {
	boards, err := h.store.GetBoards()
	if err != nil {
		http.Error(w, "Failed to get boards", http.StatusInternalServerError)
		return
	}

	// Find the Shopping board
	var shoppingBoardID string
	for _, b := range boards {
		if strings.EqualFold(b.Name, "Shopping") {
			shoppingBoardID = b.ID
			break
		}
	}

	if shoppingBoardID == "" {
		http.Error(w, "Shopping board not found", http.StatusNotFound)
		return
	}

	// Get lists for the shopping board
	lists, err := h.trelloClient.GetLists(r.Context(), shoppingBoardID)
	if err != nil {
		http.Error(w, "Failed to get lists", http.StatusInternalServerError)
		log.Printf("Error fetching shopping lists: %v", err)
		return
	}

	w.Header().Set("Content-Type", "text/html")
	for _, list := range lists {
		fmt.Fprintf(w, `<option value="%s">%s</option>`, list.ID, list.Name)
	}
}

// HandleUpdateTask updates a task description
func (h *Handler) HandleUpdateTask(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	if err := r.ParseForm(); err != nil {
		http.Error(w, "Failed to parse form", http.StatusBadRequest)
		return
	}

	id := r.FormValue("id")
	source := r.FormValue("source")
	description := r.FormValue("description")

	if id == "" || source == "" {
		http.Error(w, "Missing id or source", http.StatusBadRequest)
		return
	}

	var err error
	switch source {
	case "todoist":
		updates := map[string]interface{}{"description": description}
		err = h.todoistClient.UpdateTask(ctx, id, updates)
	case "trello":
		updates := map[string]interface{}{"desc": description}
		err = h.trelloClient.UpdateCard(ctx, id, updates)
	default:
		http.Error(w, "Unknown source", http.StatusBadRequest)
		return
	}

	if err != nil {
		http.Error(w, "Failed to update task", http.StatusInternalServerError)
		log.Printf("Error updating task: %v", err)
		return
	}

	w.WriteHeader(http.StatusOK)
}