501 lines
17 KiB
Dart
501 lines
17 KiB
Dart
/// Cart Page
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///
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/// Shopping cart screen with selection and checkout.
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/// Features expanded item list with total price at bottom.
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library;
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import 'package:worker/core/utils/extensions.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:font_awesome_flutter/font_awesome_flutter.dart';
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import 'package:go_router/go_router.dart';
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import 'package:intl/intl.dart';
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import 'package:worker/core/widgets/loading_indicator.dart';
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import 'package:worker/core/constants/ui_constants.dart';
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import 'package:worker/core/router/app_router.dart';
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import 'package:worker/core/theme/colors.dart';
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import 'package:worker/core/theme/typography.dart';
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import 'package:worker/features/cart/presentation/providers/cart_provider.dart';
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import 'package:worker/features/cart/presentation/providers/cart_state.dart';
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import 'package:worker/features/cart/presentation/widgets/cart_item_widget.dart';
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/// Cart Page
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///
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/// Features:
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/// - AppBar with back, title (with count), and delete button
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/// - Select all section with count display
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/// - Expanded cart items list with checkboxes
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/// - Total price and checkout button at bottom
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class CartPage extends ConsumerStatefulWidget {
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const CartPage({super.key});
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@override
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ConsumerState<CartPage> createState() => _CartPageState();
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}
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class _CartPageState extends ConsumerState<CartPage> {
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bool _isSyncing = false;
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// Cart is initialized once in home_page.dart at app startup
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// Provider has keepAlive: true, so no need to reload here
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// Note: Sync is handled in PopScope.onPopInvokedWithResult for back navigation
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// and in checkout button handler for checkout flow.
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// No dispose() method needed - using ref.read() in dispose() is unsafe.
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@override
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Widget build(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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final cartState = ref.watch(cartProvider);
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final itemCount = cartState.itemCount;
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final hasSelection = cartState.selectedCount > 0;
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return PopScope(
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// Intercept back navigation to sync pending updates
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onPopInvokedWithResult: (didPop, result) async {
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if (didPop) {
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// Sync any pending quantity updates before leaving the page
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await ref.read(cartProvider.notifier).forceSyncPendingUpdates();
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}
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},
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child: Scaffold(
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backgroundColor: colorScheme.surfaceContainerLowest,
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appBar: AppBar(
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leading: IconButton(
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icon: FaIcon(FontAwesomeIcons.arrowLeft, color: colorScheme.onSurface, size: 20),
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onPressed: () => context.pop(),
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),
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title: Text(
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'Giỏ hàng ($itemCount)',
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style: TextStyle(color: colorScheme.onSurface),
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),
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elevation: AppBarSpecs.elevation,
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backgroundColor: colorScheme.surface,
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foregroundColor: colorScheme.onSurface,
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centerTitle: false,
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actions: [
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if (cartState.isNotEmpty)
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IconButton(
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icon: Icon(
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FontAwesomeIcons.trashCan,
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color: hasSelection ? AppColors.danger : colorScheme.onSurfaceVariant,
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),
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onPressed: hasSelection
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? () {
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_showDeleteConfirmation(context, ref, cartState);
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}
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: null,
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tooltip: 'Xóa sản phẩm đã chọn',
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),
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const SizedBox(width: AppSpacing.sm),
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],
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),
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body: cartState.isLoading && cartState.isEmpty
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? const CustomLoadingIndicator()
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: cartState.errorMessage != null && cartState.isEmpty
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? _buildErrorState(context, cartState.errorMessage!)
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: cartState.isEmpty
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? _buildEmptyCart(context)
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: Column(
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children: [
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// Error banner if there's an error
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if (cartState.errorMessage != null)
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_buildErrorBanner(cartState.errorMessage!),
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// Select All Section
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const SizedBox(height: 8),
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_buildSelectAllSection(cartState, ref),
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const SizedBox(height: 8),
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// Expanded Cart Items List
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Expanded(
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child: Stack(
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children: [
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ListView.builder(
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itemCount: cartState.items.length,
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itemBuilder: (context, index) {
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return CartItemWidget(item: cartState.items[index]);
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},
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),
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// Loading overlay
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if (cartState.isLoading)
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Container(
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color: colorScheme.onSurface.withValues(alpha: 0.1),
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child: const CustomLoadingIndicator(),
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),
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],
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),
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),
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// Total and Checkout at Bottom
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_buildBottomSection(
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context,
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cartState,
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ref,
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NumberFormat.currency(
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locale: 'vi_VN',
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symbol: 'đ',
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decimalDigits: 0,
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),
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hasSelection,
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),
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],
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),
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),
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);
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}
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/// Build select all section
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Widget _buildSelectAllSection(CartState cartState, WidgetRef ref) {
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final colorScheme = Theme.of(context).colorScheme;
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return Container(
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margin: const EdgeInsets.symmetric(horizontal: 16),
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padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
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decoration: BoxDecoration(
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color: colorScheme.surface,
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borderRadius: BorderRadius.circular(12),
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boxShadow: [
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BoxShadow(
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color: colorScheme.onSurface.withValues(alpha: 0.05),
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blurRadius: 4,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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// Checkbox with label
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GestureDetector(
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onTap: () {
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ref.read(cartProvider.notifier).toggleSelectAll();
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},
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child: Row(
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children: [
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_CustomCheckbox(
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value: cartState.isAllSelected,
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onChanged: (value) {
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ref.read(cartProvider.notifier).toggleSelectAll();
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},
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),
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const SizedBox(width: 12),
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Text(
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'Chọn tất cả',
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style: AppTypography.titleMedium.copyWith(
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fontWeight: FontWeight.w600,
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),
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),
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],
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),
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),
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// Selected count
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Text(
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'Đã chọn: ${cartState.selectedCount}/${cartState.itemCount}',
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style: AppTypography.bodyMedium.copyWith(
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color: colorScheme.primary,
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fontWeight: FontWeight.w600,
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fontSize: 14,
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),
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),
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],
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),
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);
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}
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/// Build bottom section with total price and checkout button
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Widget _buildBottomSection(
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BuildContext context,
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CartState cartState,
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WidgetRef ref,
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NumberFormat currencyFormatter,
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bool hasSelection,
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) {
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final colorScheme = Theme.of(context).colorScheme;
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return Container(
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decoration: BoxDecoration(
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color: colorScheme.surface,
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border: Border(
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top: BorderSide(color: colorScheme.outlineVariant, width: 2),
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),
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boxShadow: [
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BoxShadow(
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color: colorScheme.onSurface.withValues(alpha: 0.08),
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blurRadius: 10,
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offset: const Offset(0, -2),
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),
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],
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),
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child: SafeArea(
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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// Total Price Row
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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'Tổng tạm tính (${cartState.selectedCount} sản phẩm)',
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style: AppTypography.bodyMedium.copyWith(
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color: colorScheme.onSurfaceVariant,
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fontSize: 14,
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),
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),
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Text(
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currencyFormatter.format(cartState.selectedTotal),
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style: AppTypography.headlineSmall.copyWith(
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color: colorScheme.primary,
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fontWeight: FontWeight.bold,
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fontSize: 20,
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),
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),
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],
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),
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const SizedBox(height: 16),
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// Checkout Button
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SizedBox(
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width: double.infinity,
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height: 48,
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child: ElevatedButton(
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onPressed: hasSelection && !_isSyncing
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? () async {
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// Set syncing state
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setState(() {
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_isSyncing = true;
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});
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// Force sync any pending quantity updates before checkout
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await ref
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.read(cartProvider.notifier)
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.forceSyncPendingUpdates();
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// Reset syncing state
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if (mounted) {
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setState(() {
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_isSyncing = false;
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});
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// Get selected CartItemData objects
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// Pass complete CartItemData to preserve conversion calculations
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final selectedCartItems = cartState.items
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.where((item) =>
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cartState.selectedItems[item.product.productId] == true)
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.toList();
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// Navigate to checkout with CartItemData
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// Checkout page will fetch fresh pricing from API
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context.push(
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RouteNames.checkout,
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extra: {'cartItems': selectedCartItems},
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);
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}
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}
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: null,
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style: ElevatedButton.styleFrom(
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backgroundColor: colorScheme.primary,
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disabledBackgroundColor: colorScheme.inverseSurface.withValues(alpha: 0.6),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(10),
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),
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elevation: 0,
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),
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child: _isSyncing
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? CustomLoadingIndicator(
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color: colorScheme.surface,
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size: 20,
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)
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: Text(
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'Tiến hành đặt hàng',
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style: AppTypography.labelLarge.copyWith(
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color: colorScheme.surface,
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fontWeight: FontWeight.w600,
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fontSize: 16,
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),
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),
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),
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),
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],
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),
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),
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),
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);
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}
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/// Build error banner (shown at top when there's an error but cart has items)
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Widget _buildErrorBanner(String errorMessage) {
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return Container(
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width: double.infinity,
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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color: AppColors.danger.withValues(alpha: 0.1),
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child: Row(
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children: [
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const FaIcon(FontAwesomeIcons.circleExclamation, color: AppColors.danger, size: 18),
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const SizedBox(width: 8),
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Expanded(
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child: Text(
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errorMessage,
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style: AppTypography.bodySmall.copyWith(color: AppColors.danger),
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),
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),
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],
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),
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);
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}
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/// Build error state (shown when cart fails to load and is empty)
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Widget _buildErrorState(BuildContext context, String errorMessage) {
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final colorScheme = Theme.of(context).colorScheme;
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const FaIcon(FontAwesomeIcons.circleExclamation, size: 56, color: AppColors.danger),
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const SizedBox(height: 16),
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const Text(
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'Không thể tải giỏ hàng',
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style: AppTypography.headlineMedium,
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),
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const SizedBox(height: 8),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 32),
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child: Text(
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errorMessage,
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style: AppTypography.bodyMedium.copyWith(color: colorScheme.onSurfaceVariant),
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textAlign: TextAlign.center,
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),
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),
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const SizedBox(height: 24),
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ElevatedButton.icon(
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onPressed: () {
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ref.read(cartProvider.notifier).initialize();
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},
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icon: const FaIcon(FontAwesomeIcons.arrowsRotate, size: 20),
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label: const Text('Thử lại'),
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),
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],
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),
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);
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}
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/// Build empty cart state
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Widget _buildEmptyCart(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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FontAwesomeIcons.cartShopping,
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size: 80,
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color: colorScheme.onSurfaceVariant.withValues(alpha: 0.5),
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),
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const SizedBox(height: 16),
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Text(
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'Giỏ hàng trống',
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style: AppTypography.headlineMedium.copyWith(
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color: colorScheme.onSurfaceVariant,
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),
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),
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const SizedBox(height: 8),
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Text(
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'Hãy thêm sản phẩm vào giỏ hàng',
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style: AppTypography.bodyMedium.copyWith(color: colorScheme.onSurfaceVariant),
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),
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const SizedBox(height: 24),
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ElevatedButton.icon(
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onPressed: () => context.push(RouteNames.products),
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icon: const FaIcon(FontAwesomeIcons.bagShopping, size: 20),
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label: const Text('Xem sản phẩm'),
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),
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],
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),
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);
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}
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/// Show delete confirmation dialog
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void _showDeleteConfirmation(
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BuildContext context,
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WidgetRef ref,
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CartState cartState,
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) {
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showDialog<void>(
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context: context,
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builder: (context) => AlertDialog(
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title: const Text('Xóa sản phẩm'),
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content: Text(
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'Bạn có chắc muốn xóa ${cartState.selectedCount} sản phẩm đã chọn?',
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),
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actions: [
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TextButton(
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onPressed: () => context.pop(),
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child: const Text('Hủy'),
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),
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ElevatedButton(
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onPressed: () {
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ref.read(cartProvider.notifier).deleteSelected();
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context.pop();
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Đã xóa sản phẩm khỏi giỏ hàng'),
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backgroundColor: AppColors.success,
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duration: Duration(seconds: 2),
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),
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);
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},
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style: ElevatedButton.styleFrom(backgroundColor: AppColors.danger),
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child: const Text('Xóa'),
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),
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],
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),
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);
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}
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}
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/// Custom Checkbox Widget
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///
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/// Matches HTML design with 22px size, 6px radius, blue when checked.
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class _CustomCheckbox extends StatelessWidget {
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const _CustomCheckbox({required this.value, this.onChanged});
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final bool value;
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final ValueChanged<bool?>? onChanged;
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@override
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Widget build(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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return GestureDetector(
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onTap: () => onChanged?.call(!value),
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child: Container(
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width: 22,
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height: 22,
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decoration: BoxDecoration(
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color: value ? colorScheme.primary : colorScheme.surface,
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border: Border.all(
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color: value ? colorScheme.primary : colorScheme.outlineVariant,
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width: 2,
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),
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borderRadius: BorderRadius.circular(6),
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),
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child: value
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? Icon(
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FontAwesomeIcons.check,
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size: 16,
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color: colorScheme.surface,
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)
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: null,
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),
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);
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}
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}
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