/// Cart Item Widget
///
/// Displays a single item in the cart with image, details, and quantity controls.
library;

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/intl.dart';
import 'package:worker/core/theme/colors.dart';
import 'package:worker/core/theme/typography.dart';
import 'package:worker/features/cart/presentation/providers/cart_provider.dart';
import 'package:worker/features/cart/presentation/providers/cart_state.dart';

/// Cart Item Widget
///
/// Displays:
/// - Product image (80x80, rounded)
/// - Product name and SKU
/// - Price per unit
/// - Quantity controls (-, value, +, unit label)
class CartItemWidget extends ConsumerWidget {
  final CartItemData item;

  const CartItemWidget({
    super.key,
    required this.item,
  });

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final currencyFormatter = NumberFormat.currency(
      locale: 'vi_VN',
      symbol: 'đ',
      decimalDigits: 0,
    );

    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: AppColors.white,
        borderRadius: BorderRadius.circular(12),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.05),
            blurRadius: 4,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Product Image
          ClipRRect(
            borderRadius: BorderRadius.circular(8),
            child: CachedNetworkImage(
              imageUrl: item.product.imageUrl,
              width: 80,
              height: 80,
              fit: BoxFit.cover,
              placeholder: (context, url) => Container(
                width: 80,
                height: 80,
                color: AppColors.grey100,
                child: const Center(
                  child: CircularProgressIndicator(
                    strokeWidth: 2,
                  ),
                ),
              ),
              errorWidget: (context, url, error) => Container(
                width: 80,
                height: 80,
                color: AppColors.grey100,
                child: const Icon(
                  Icons.image_not_supported,
                  color: AppColors.grey500,
                ),
              ),
            ),
          ),

          const SizedBox(width: 12),

          // Product Info
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                // Product Name
                Text(
                  item.product.name,
                  style: AppTypography.titleMedium.copyWith(
                    fontWeight: FontWeight.w600,
                  ),
                  maxLines: 2,
                  overflow: TextOverflow.ellipsis,
                ),

                const SizedBox(height: 4),

                // SKU
                Text(
                  'Mã: ${item.product.erpnextItemCode ?? item.product.productId}',
                  style: AppTypography.bodySmall.copyWith(
                    color: AppColors.grey500,
                  ),
                ),

                const SizedBox(height: 8),

                // Price
                Text(
                  '${currencyFormatter.format(item.product.basePrice)}/${item.product.unit ?? 'm²'}',
                  style: AppTypography.titleMedium.copyWith(
                    color: AppColors.primaryBlue,
                    fontWeight: FontWeight.bold,
                  ),
                ),

                const SizedBox(height: 12),

                // Quantity Controls
                Row(
                  children: [
                    // Decrease button
                    _QuantityButton(
                      icon: Icons.remove,
                      onPressed: () {
                        ref.read(cartProvider.notifier).decrementQuantity(
                              item.product.productId,
                            );
                      },
                    ),

                    const SizedBox(width: 12),

                    // Quantity value
                    Text(
                      item.quantity.toStringAsFixed(0),
                      style: AppTypography.titleMedium.copyWith(
                        fontWeight: FontWeight.w600,
                      ),
                    ),

                    const SizedBox(width: 12),

                    // Increase button
                    _QuantityButton(
                      icon: Icons.add,
                      onPressed: () {
                        ref.read(cartProvider.notifier).incrementQuantity(
                              item.product.productId,
                            );
                      },
                    ),

                    const SizedBox(width: 8),

                    // Unit label
                    Text(
                      item.product.unit ?? 'm²',
                      style: AppTypography.bodySmall.copyWith(
                        color: AppColors.grey500,
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

/// Quantity Button
///
/// Small circular button for incrementing/decrementing quantity.
class _QuantityButton extends StatelessWidget {
  final IconData icon;
  final VoidCallback onPressed;

  const _QuantityButton({
    required this.icon,
    required this.onPressed,
  });

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: onPressed,
      borderRadius: BorderRadius.circular(20),
      child: Container(
        width: 32,
        height: 32,
        decoration: BoxDecoration(
          color: AppColors.grey100,
          borderRadius: BorderRadius.circular(20),
        ),
        child: Icon(
          icon,
          size: 18,
          color: AppColors.grey900,
        ),
      ),
    );
  }
}