// Package handlers provides HTTP request handlers for NextReceipt.
//
// This file implements the dashboard handler showing all purchases
// for the authenticated user.
package handlers

import (
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"time"

	"github.com/cclohmar/NextReceipt/internal/database"
)

// ---------------------------------------------------------------------------
// DashboardHandler
// ---------------------------------------------------------------------------

// DashboardHandler groups HTTP handlers related to the main dashboard view.
type DashboardHandler struct {
	DB *sql.DB
}

// NewDashboardHandler creates a new DashboardHandler with the given database handle.
func NewDashboardHandler(db *sql.DB) *DashboardHandler {
	return &DashboardHandler{DB: db}
}

// ---------------------------------------------------------------------------
// GET /dashboard — Dashboard
// ---------------------------------------------------------------------------

// Dashboard renders the main dashboard page showing all purchases belonging
// to the authenticated user, along with the receipt upload controls.
func (h *DashboardHandler) Dashboard(w http.ResponseWriter, r *http.Request) {
	userID := getUserID(r)
	if userID == "" {
		log.Printf("ERROR [%s] handlers: Dashboard: missing user ID", time.Now().Format(time.RFC3339))
		http.Error(w, "Unauthorized", http.StatusUnauthorized)
		return
	}

	purchases, err := database.GetPurchasesByUser(h.DB, userID)
	if err != nil {
		log.Printf("ERROR [%s] handlers: Dashboard: GetPurchasesByUser: %v",
			time.Now().Format(time.RFC3339), err)
		http.Error(w, "Failed to load purchases", http.StatusInternalServerError)
		return
	}

	// Normalize ImagePath for all purchases.
	for i := range purchases {
		purchases[i].ImagePath = normalizeImagePath(purchases[i].ImagePath)
	}

	tmpl := getTemplate("dashboard.html")

	data := map[string]interface{}{
		"Purchases": purchases,
		"Query":     "",
	}

	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	if err := tmpl.Execute(w, data); err != nil {
		log.Printf("ERROR [%s] handlers: Dashboard: execute template: %v",
			time.Now().Format(time.RFC3339), err)
	}
}

// ---------------------------------------------------------------------------
// GET /search — SearchPurchases
// ---------------------------------------------------------------------------

// SearchPurchases handles the HTMX search request, returning only the purchase
// list fragment filtered by the search query.
func (h *DashboardHandler) SearchPurchases(w http.ResponseWriter, r *http.Request) {
	userID := getUserID(r)
	if userID == "" {
		http.Error(w, "Unauthorized", http.StatusUnauthorized)
		return
	}

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

	purchases, err := database.SearchPurchases(h.DB, userID, query)
	if err != nil {
		log.Printf("ERROR [%s] handlers: SearchPurchases: %v",
			time.Now().Format(time.RFC3339), err)
		http.Error(w, "Search failed", http.StatusInternalServerError)
		return
	}

	// Normalize ImagePath for all purchases.
	for i := range purchases {
		purchases[i].ImagePath = normalizeImagePath(purchases[i].ImagePath)
	}

	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	fmt.Fprint(w, renderPurchaseList(purchases))
}