<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use App\Models\Product;
use App\Models\Order;

class CartController extends Controller
{
    public function index()
    {
        $cart = session()->get('cart', []);
        return view('cart', compact('cart'));
    }

    public function add(Request $request, $id)
    {
        $product = Product::findOrFail($id);
        $quantity = (int) $request->input('quantity', 1);

        // Check if product has enough stock
        if ($product->Amount < $quantity) {
            if ($request->ajax()) {
                return response()->json([
                    'success' => false,
                    'message' => 'Insufficient stock. Available: ' . $product->Amount
                ]);
            }
            return back()->with('error', 'Insufficient stock. Available: ' . $product->Amount);
        }

        $cart = session()->get('cart', []);

        if (isset($cart[$id])) {
            $newQuantity = $cart[$id]['quantity'] + $quantity;
            if ($newQuantity > $product->Amount) {
                if ($request->ajax()) {
                    return response()->json([
                        'success' => false,
                        'message' => 'Cannot add more items. Stock limit: ' . $product->Amount
                    ]);
                }
                return back()->with('error', 'Cannot add more items. Stock limit: ' . $product->Amount);
            }
            $cart[$id]['quantity'] = $newQuantity;
        } else {
            $cart[$id] = [
                'id' => $product->id,
                'name' => $product->name,
                'image' => $product->image,
                'price' => $product->price,
                'quantity' => $quantity,
                'game' => $product->game,
            ];
        }

        session()->put('cart', $cart);

        // Return JSON response for AJAX requests
        if ($request->ajax()) {
            return response()->json([
                'success' => true,
                'message' => 'Item added to cart successfully',
                'cart_count' => array_sum(array_column($cart, 'quantity'))
            ]);
        }

        return redirect()->route('cart.index')->with('success', 'เพิ่มสินค้าลงตะกร้าเรียบร้อยแล้ว');
    }

    public function remove($id)
    {
        $cart = session()->get('cart', []);

        if (isset($cart[$id])) {
            unset($cart[$id]);
            session()->put('cart', $cart);
        }

        return redirect()->route('cart.index')->with('success', 'ลบสินค้าออกจากตะกร้าเรียบร้อยแล้ว');
    }
    public function checkout(Request $request)
    {
        $request->validate([
            'customer_name' => 'required|string|max:255',
            'phone' => 'required|string|max:20',
            'payment_slip' => 'required|image|mimes:jpeg,png,jpg,gif|max:10240', // 10MB limit
        ]);

        try {
            $path = $request->file('payment_slip')->store('payment_slips', 'public');

            // Get cart data
            $cart = session()->get('cart', []);
            
            if (empty($cart)) {
                return back()->with('error', 'Your cart is empty');
            }

            // Calculate total amount and validate stock
            $totalAmount = 0;
            foreach ($cart as $item) {
                $product = Product::find($item['id']);
                if (!$product) {
                    return back()->with('error', "Product {$item['name']} no longer exists");
                }
                if ($product->Amount < $item['quantity']) {
                    return back()->with('error', "Insufficient stock for {$product->name}. Available: {$product->Amount}, Requested: {$item['quantity']}");
                }
                $totalAmount += $item['price'] * $item['quantity'];
            }
            
            // Create order
            $order = Order::create([
                'customer_name' => $request->customer_name,
                'phone' => $request->phone,
                'payment_slip_path' => $path,
                'cart_data' => json_encode($cart),
                'total_amount' => $totalAmount,
                'status' => 'pending',
            ]);
            
            // Update product stock
            foreach ($cart as $item) {
                $product = Product::find($item['id']);
                if ($product) {
                    $product->Amount = max(0, $product->Amount - $item['quantity']);
                    $product->save();
                }
            }

            // Clear cart
            session()->forget('cart');

            return redirect()->route('cart.index')->with('success', 'Thank you for your order! We have received your order successfully.');
            
        } catch (\Exception $e) {
            return back()->with('error', 'Failed to process order: ' . $e->getMessage());
        }
    }
    public function order()
    {
        $orders = Order::latest()->get(); // ดึงทั้งหมด เรียงล่าสุดก่อน
        return view('order', compact('orders'));
    }
    public function deleteOrder($id)
    {
        try {
            $order = Order::findOrFail($id);
            
            // Delete payment slip file if it exists
            if ($order->payment_slip_path && Storage::disk('public')->exists($order->payment_slip_path)) {
                Storage::disk('public')->delete($order->payment_slip_path);
            }
            
            $order->delete();

            return back()->with('success', 'Order deleted successfully');
        } catch (\Exception $e) {
            return back()->with('error', 'Failed to delete order: ' . $e->getMessage());
        }
    }

    public function show($id)
    {
        try {
            $order = Order::findOrFail($id);
            return view('order-detail', compact('order'));
        } catch (\Exception $e) {
            return redirect()->route('orders.index')->with('error', 'Order not found');
        }
    }

    public function completeOrder($id)
    {
        try {
            $order = Order::findOrFail($id);
            
            // Update order status to completed
            $order->status = 'completed';
            $order->save();

            return redirect()->route('orders.index')->with('success', 'Order #' . str_pad($order->id, 4, '0', STR_PAD_LEFT) . ' has been ACCEPTED successfully!');
        } catch (\Exception $e) {
            return redirect()->route('orders.index')->with('error', 'Failed to accept order: ' . $e->getMessage());
        }
    }

    public function rejectOrder($id)
    {
        try {
            $order = Order::findOrFail($id);
            
            // Update order status to cancelled (rejected)
            $order->status = 'cancelled';
            $order->save();

            return redirect()->route('orders.index')->with('success', 'Order #' . str_pad($order->id, 4, '0', STR_PAD_LEFT) . ' has been REJECTED. Customer will see it as cancelled.');
        } catch (\Exception $e) {
            return redirect()->route('orders.index')->with('error', 'Failed to reject order: ' . $e->getMessage());
        }
    }

    public function customerOrders(Request $request)
    {
        // For now, we'll show all orders since we don't have user authentication for customers
        // In a real app, you'd filter by authenticated customer
        $orders = Order::latest()->get();
        
        // If it's an AJAX request for load more functionality
        if ($request->ajax()) {
            $page = $request->get('page', 1);
            $perPage = 3;
            $offset = ($page - 1) * $perPage;
            $status = $request->get('status');
            $game = $request->get('game');
            
            // Filter orders based on status
            $filteredOrders = $orders;
            
            if ($status && $status !== 'recently') {
                $filteredOrders = $orders->where('status', $status);
            }
            
            // Filter by game if specified
            if ($game && $game !== 'all') {
                $filteredOrders = $filteredOrders->filter(function($order) use ($game) {
                    $items = json_decode($order->cart_data, true);
                    if (is_array($items)) {
                        foreach ($items as $item) {
                            $product = \App\Models\Product::find($item['id'] ?? null);
                            if ($product && $product->game === $game) {
                                return true;
                            }
                        }
                    }
                    return false;
                });
            }
            
            $paginatedOrders = $filteredOrders->slice($offset, $perPage);
            $hasMore = $filteredOrders->count() > ($offset + $perPage);
            
            return response()->json([
                'orders' => $paginatedOrders->values(),
                'hasMore' => $hasMore,
                'currentPage' => $page
            ]);
        }
        
        return view('customer-orders', compact('orders'));
    }
}