import 'package:flutter/material.dart';
import 'package:flutter_slidable/flutter_slidable.dart';

import '../../l10n/app_localizations.dart';
import '../../models/bar_tab.dart';
import '../../models/tab_item.dart';
import '../../utils/money.dart';
import 'selected_tab_details.dart';

class TabPanel extends StatefulWidget {
  final List<BarTab> tabs;
  final BarTab? selectedTab;
  final String? selectedTabId;
  final Map<String, int> stockByProductId;
  final VoidCallback onNewTabPressed;
  final ValueChanged<String> onTabSelected;
  final Future<void> Function(TabItem item, int delta) onItemQuantityChanged;
  final VoidCallback onCloseTabPressed;
  final Future<void> Function(BarTab) onTabEdited;
  final Future<void> Function(BarTab) onTabDeleted;

  const TabPanel({
    super.key,
    required this.tabs,
    required this.selectedTab,
    required this.selectedTabId,
    required this.stockByProductId,
    required this.onNewTabPressed,
    required this.onTabSelected,
    required this.onItemQuantityChanged,
    required this.onCloseTabPressed,
    required this.onTabEdited,
    required this.onTabDeleted,
  });

  @override
  State<TabPanel> createState() => _TabPanelState();
}

class _TabPanelState extends State<TabPanel> {
  final TextEditingController _searchController = TextEditingController();
  String _searchQuery = '';

  @override
  void dispose() {
    _searchController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final l10n = AppLocalizations.of(context);

    final filteredTabs = widget.tabs.where((tab) {
      return tab.customerName.toLowerCase().contains(
        _searchQuery.toLowerCase(),
      );
    }).toList();

    return DecoratedBox(
      decoration: BoxDecoration(color: scheme.surfaceContainerLow),
      child: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                Expanded(
                  child: TextField(
                    controller: _searchController,
                    onChanged: (value) {
                      setState(() {
                        _searchQuery = value;
                      });
                    },
                    decoration: InputDecoration(
                      hintText: l10n.searchByName,
                      prefixIcon: Icon(Icons.search_rounded, size: 20),
                      suffixIcon: _searchQuery.isEmpty
                          ? null
                          : IconButton(
                              onPressed: () {
                                _searchController.clear();
                                setState(() {
                                  _searchQuery = '';
                                });
                              },
                              icon: const Icon(Icons.clear_rounded),
                              tooltip: l10n.clearSearch,
                            ),
                      isDense: true,
                    ),
                  ),
                ),

                const SizedBox(width: 10),

                IconButton.filled(
                  onPressed: widget.onNewTabPressed,
                  icon: const Icon(Icons.add_rounded),
                  tooltip: l10n.openNewTab,
                ),
              ],
            ),

            const SizedBox(height: 8),

            SizedBox(
              height: 190,
              child: OpenTabsList(
                tabs: filteredTabs,
                selectedTabId: widget.selectedTabId,
                onTabSelected: widget.onTabSelected,
                onTabEdited: widget.onTabEdited,
                onTabDeleted: widget.onTabDeleted,
              ),
            ),

            const Divider(height: 28),

            Expanded(
              child: widget.selectedTab == null
                  ? Center(
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Icon(
                            Icons.receipt_long_outlined,
                            size: 36,
                            color: scheme.onSurface.withValues(alpha: 0.25),
                          ),
                          const SizedBox(height: 10),
                          Text(
                            l10n.selectOrOpenTab,
                            style: Theme.of(context).textTheme.bodyMedium,
                          ),
                        ],
                      ),
                    )
                  : SelectedTabDetails(
                      tab: widget.selectedTab!,
                      stockByProductId: widget.stockByProductId,
                      onItemQuantityChanged: widget.onItemQuantityChanged,
                      onCloseTabPressed: widget.onCloseTabPressed,
                    ),
            ),
          ],
        ),
      ),
    );
  }
}

class OpenTabsList extends StatelessWidget {
  final List<BarTab> tabs;
  final String? selectedTabId;
  final ValueChanged<String> onTabSelected;
  final Future<void> Function(BarTab) onTabEdited;
  final Future<void> Function(BarTab) onTabDeleted;

  const OpenTabsList({
    super.key,
    required this.tabs,
    required this.selectedTabId,
    required this.onTabSelected,
    required this.onTabEdited,
    required this.onTabDeleted,
  });

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context);
    if (tabs.isEmpty) {
      return Center(
        child: Text(
          l10n.noOpenTabs,
          style: Theme.of(context).textTheme.bodyMedium,
        ),
      );
    }

    return ListView.separated(
      itemCount: tabs.length,
      separatorBuilder: (_, _) => const SizedBox(height: 8),
      itemBuilder: (context, index) {
        final tab = tabs[index];
        final selected = tab.id == selectedTabId;
        final scheme = Theme.of(context).colorScheme;
        final primary = scheme.primary;

        return ClipRRect(
          borderRadius: BorderRadius.circular(14),
          child: Slidable(
            key: ValueKey(tab.id),
            endActionPane: ActionPane(
              motion: const DrawerMotion(),
              extentRatio: 0.6,
              children: [
                SlidableAction(
                  onPressed: (_) => onTabEdited(tab),
                  icon: Icons.edit_outlined,
                  label: l10n.edit,
                  backgroundColor: Theme.of(context).colorScheme.secondary,
                  foregroundColor: Theme.of(context).colorScheme.onSecondary,
                ),
                SlidableAction(
                  onPressed: (_) => onTabDeleted(tab),
                  icon: Icons.delete_outline_rounded,
                  label: l10n.delete,
                  backgroundColor: Theme.of(context).colorScheme.error,
                  foregroundColor: Theme.of(context).colorScheme.onError,
                ),
              ],
            ),
            child: AnimatedContainer(
              duration: const Duration(milliseconds: 150),
              decoration: BoxDecoration(
                color: selected
                    ? primary.withValues(alpha: 0.14)
                    : scheme.onSurface.withValues(alpha: 0.04),
                borderRadius: BorderRadius.circular(14),
                border: Border.all(
                  color: selected
                      ? primary.withValues(alpha: 0.6)
                      : scheme.onSurface.withValues(alpha: 0.06),
                  width: selected ? 1.4 : 1,
                ),
              ),
              child: Material(
                color: Colors.transparent,
                child: InkWell(
                  borderRadius: BorderRadius.circular(14),
                  onTap: () => onTabSelected(tab.id),
                  child: Padding(
                    padding: const EdgeInsets.symmetric(
                      horizontal: 16,
                      vertical: 14,
                    ),
                    child: SizedBox(
                      width: double.infinity,
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Text(
                            tab.customerName,
                            maxLines: 1,
                            overflow: TextOverflow.ellipsis,
                            style: TextStyle(
                              fontSize: 16,
                              fontWeight: FontWeight.w800,
                              color: scheme.onSurface,
                            ),
                          ),
                          const SizedBox(height: 4),
                          Text(
                            l10n.tabItemSummary(
                              tab.itemCount,
                              tab.totalInCents.asEuro,
                            ),
                            style: Theme.of(context).textTheme.bodySmall,
                          ),
                        ],
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
        );
      },
    );
  }
}