import 'package:flutter/material.dart';
import 'package:hesabix_ui/l10n/app_localizations.dart';
import 'package:go_router/go_router.dart';
import '../../core/auth_store.dart';
import '../../widgets/data_table/data_table_widget.dart';
import '../../widgets/data_table/data_table_config.dart';
import '../../widgets/permission/permission_widgets.dart';
import '../../widgets/invoice/person_combobox_widget.dart';
import '../../models/person_model.dart';
import '../../services/check_service.dart';
import '../../widgets/invoice/bank_account_combobox_widget.dart';

class ChecksPage extends StatefulWidget {
  final int businessId;
  final AuthStore authStore;

  const ChecksPage({
    super.key,
    required this.businessId,
    required this.authStore,
  });

  @override
  State<ChecksPage> createState() => _ChecksPageState();
}

class _ChecksPageState extends State<ChecksPage> {
  final GlobalKey _tableKey = GlobalKey();
  Person? _selectedPerson;
  final _checkService = CheckService();

  void _refresh() {
    try { (_tableKey.currentState as dynamic)?.refresh(); } catch (_) {}
  }

  @override
  Widget build(BuildContext context) {
    final t = AppLocalizations.of(context);

    if (!widget.authStore.canReadSection('checks')) {
      return AccessDeniedPage(message: t.accessDenied);
    }

    return Scaffold(
      body: DataTableWidget<Map<String, dynamic>>(
        key: _tableKey,
        config: _buildConfig(t, context),
        fromJson: (json) => json,
      ),
    );
  }

  DataTableConfig<Map<String, dynamic>> _buildConfig(AppLocalizations t, BuildContext context) {
    return DataTableConfig<Map<String, dynamic>>(
      endpoint: '/api/v1/checks/businesses/${widget.businessId}/checks',
      title: (t.localeName == 'fa') ? 'چک‌ها' : 'Checks',
      excelEndpoint: '/api/v1/checks/businesses/${widget.businessId}/checks/export/excel',
      pdfEndpoint: '/api/v1/checks/businesses/${widget.businessId}/checks/export/pdf',
      getExportParams: () => {'business_id': widget.businessId, if (_selectedPerson != null) 'person_id': _selectedPerson!.id},
      additionalParams: { if (_selectedPerson != null) 'person_id': _selectedPerson!.id },
      showBackButton: true,
      onBack: () => Navigator.of(context).maybePop(),
      showTableIcon: false,
      showRowNumbers: true,
      enableRowSelection: true,
      enableMultiRowSelection: true,
      showColumnSearch: true,
      showActiveFilters: true,
      showClearFiltersButton: true,
      columns: [
        TextColumn(
          'type',
          'نوع',
          width: ColumnWidth.small,
          filterType: ColumnFilterType.multiSelect,
          filterOptions: const [
            FilterOption(value: 'received', label: 'دریافتی'),
            FilterOption(value: 'transferred', label: 'واگذار شده'),
          ],
          formatter: (row) => (row['type'] == 'received') ? 'دریافتی' : (row['type'] == 'transferred' ? 'واگذار شده' : '-'),
        ),
        TextColumn('person_name', 'شخص', width: ColumnWidth.large,
          formatter: (row) => (row['person_name'] ?? '-'),
        ),
        DateColumn(
          'issue_date',
          'تاریخ صدور',
          width: ColumnWidth.medium,
          filterType: ColumnFilterType.dateRange,
          formatter: (row) => (row['issue_date'] ?? '-'),
        ),
        DateColumn(
          'due_date',
          'تاریخ سررسید',
          width: ColumnWidth.medium,
          filterType: ColumnFilterType.dateRange,
          formatter: (row) => (row['due_date'] ?? '-'),
        ),
        TextColumn('check_number', 'شماره چک', width: ColumnWidth.medium,
          formatter: (row) => (row['check_number'] ?? '-'),
        ),
        TextColumn('sayad_code', 'شناسه صیاد', width: ColumnWidth.medium,
          formatter: (row) => (row['sayad_code'] ?? '-'),
        ),
        TextColumn('bank_name', 'بانک', width: ColumnWidth.medium,
          formatter: (row) => (row['bank_name'] ?? '-'),
        ),
        TextColumn('branch_name', 'شعبه', width: ColumnWidth.medium,
          formatter: (row) => (row['branch_name'] ?? '-'),
        ),
        NumberColumn('amount', 'مبلغ', width: ColumnWidth.medium,
          formatter: (row) => (row['amount']?.toString() ?? '-'),
        ),
        TextColumn('currency', 'ارز', width: ColumnWidth.small,
          formatter: (row) => (row['currency'] ?? '-'),
        ),
        TextColumn('status', 'وضعیت', width: ColumnWidth.medium,
          filterType: ColumnFilterType.multiSelect,
          filterOptions: const [
            FilterOption(value: 'RECEIVED_ON_HAND', label: 'در دست (دریافتی)'),
            FilterOption(value: 'TRANSFERRED_ISSUED', label: 'صادر شده (پرداختنی)'),
            FilterOption(value: 'DEPOSITED', label: 'سپرده به بانک'),
            FilterOption(value: 'CLEARED', label: 'پاس/وصول شده'),
            FilterOption(value: 'ENDORSED', label: 'واگذار شده'),
            FilterOption(value: 'RETURNED', label: 'عودت شده'),
            FilterOption(value: 'BOUNCED', label: 'برگشت خورده'),
            FilterOption(value: 'CANCELLED', label: 'ابطال'),
          ],
          formatter: (row) {
            final s = (row['status'] ?? '').toString();
            switch (s) {
              case 'RECEIVED_ON_HAND': return 'در دست (دریافتی)';
              case 'TRANSFERRED_ISSUED': return 'صادر شده (پرداختنی)';
              case 'DEPOSITED': return 'سپرده به بانک';
              case 'CLEARED': return 'پاس/وصول شده';
              case 'ENDORSED': return 'واگذار شده';
              case 'RETURNED': return 'عودت شده';
              case 'BOUNCED': return 'برگشت خورده';
              case 'CANCELLED': return 'ابطال';
            }
            return '-';
          },
        ),
        ActionColumn('actions', t.actions, actions: [
          DataTableAction(
            icon: Icons.edit,
            label: t.edit,
            onTap: (row) {
              final id = row is Map<String, dynamic> ? row['id'] : null;
              if (id is int) {
                context.go('/business/${widget.businessId}/checks/$id/edit');
              }
            },
          ),
          DataTableAction(
            icon: Icons.arrow_forward,
            label: 'واگذاری',
            onTap: (row) {
              final type = (row['type'] ?? '').toString();
              final status = (row['status'] ?? '').toString();
              final can = type == 'received' && (status.isEmpty || ['RECEIVED_ON_HAND','RETURNED','BOUNCED'].contains(status));
              if (can) {
                _openEndorseDialog(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این عملیات برای وضعیت فعلی مجاز نیست')));
              }
            },
          ),
          DataTableAction(
            icon: Icons.check_circle,
            label: 'وصول',
            onTap: (row) {
              final type = (row['type'] ?? '').toString();
              final status = (row['status'] ?? '').toString();
              if (type == 'received' && status != 'CLEARED') {
                _openClearDialog(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این عملیات برای این چک قابل انجام نیست')));
              }
            },
          ),
          DataTableAction(
            icon: Icons.payment,
            label: 'پرداخت',
            onTap: (row) {
              final type = (row['type'] ?? '').toString();
              final status = (row['status'] ?? '').toString();
              if (type == 'transferred' && status != 'CLEARED') {
                _openPayDialog(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این عملیات برای این چک قابل انجام نیست')));
              }
            },
          ),
          DataTableAction(
            icon: Icons.reply,
            label: 'عودت',
            onTap: (row) {
              final status = (row['status'] ?? '').toString();
              if (status != 'CLEARED') {
                _confirmReturn(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این چک قبلاً پاس شده است')));
              }
            },
          ),
          DataTableAction(
            icon: Icons.block,
            label: 'برگشت',
            onTap: (row) {
              final status = (row['status'] ?? '').toString();
              if (status != 'CLEARED') {
                _confirmBounce(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این چک قبلاً پاس شده است')));
              }
            },
          ),
          DataTableAction(
            icon: Icons.account_balance,
            label: 'سپرده',
            onTap: (row) {
              final type = (row['type'] ?? '').toString();
              final status = (row['status'] ?? '').toString();
              if (type == 'received' && (status.isEmpty || status == 'RECEIVED_ON_HAND')) {
                _confirmDeposit(context, row as Map<String, dynamic>);
              } else {
                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('این عملیات برای وضعیت فعلی مجاز نیست')));
              }
            },
          ),
        ]),
      ],
      searchFields: ['check_number','sayad_code','bank_name','branch_name','person_name'],
      filterFields: ['type','currency','issue_date','due_date','status'],
      defaultPageSize: 20,
      customHeaderActions: [
        // فیلتر شخص
        SizedBox(
          width: 280,
          child: PersonComboboxWidget(
            businessId: widget.businessId,
            selectedPerson: _selectedPerson,
            onChanged: (p) {
              setState(() { _selectedPerson = p; });
              _refresh();
            },
            isRequired: false,
            label: 'شخص',
            hintText: 'جست‌وجوی شخص',
          ),
        ),
        const SizedBox(width: 8),
        PermissionButton(
          section: 'checks',
          action: 'add',
          authStore: widget.authStore,
          child: Tooltip(
            message: t.add,
            child: IconButton(
              onPressed: () => context.go('/business/${widget.businessId}/checks/new'),
              icon: const Icon(Icons.add),
            ),
          ),
        ),
      ],
      onRowTap: (row) {
        final id = row is Map<String, dynamic> ? row['id'] : null;
        if (id is int) {
          context.go('/business/${widget.businessId}/checks/$id/edit');
        }
      },
    );
  }

  Future<void> _openEndorseDialog(BuildContext context, Map<String, dynamic> row) async {
    Person? selected;
    await showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('واگذاری چک به شخص'),
        content: SizedBox(
          width: 360,
          child: PersonComboboxWidget(
            businessId: widget.businessId,
            selectedPerson: selected,
            onChanged: (p) => selected = p,
            isRequired: true,
            label: 'شخص مقصد',
            hintText: 'انتخاب شخص',
          ),
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('انصراف')),
          FilledButton(
            onPressed: () async {
              if (selected == null) return;
              try {
                await _checkService.endorse(checkId: row['id'] as int, body: {
                  'target_person_id': (selected as dynamic).id,
                  'auto_post': true,
                });
                if (mounted) Navigator.pop(ctx);
                _refresh();
              } catch (e) {
                if (mounted) Navigator.pop(ctx);
                ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('خطا: $e')));
              }
            },
            child: const Text('ثبت'),
          ),
        ],
      ),
    );
  }

  Future<void> _openClearDialog(BuildContext context, Map<String, dynamic> row) async {
    BankAccountOption? selected;
    final currencyId = row['currency_id'] as int?;
    await showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('وصول چک به بانک'),
        content: SizedBox(
          width: 420,
          child: BankAccountComboboxWidget(
            businessId: widget.businessId,
            selectedAccountId: null,
            filterCurrencyId: currencyId,
            onChanged: (opt) => selected = opt,
            label: 'حساب بانکی',
            hintText: 'انتخاب حساب بانکی',
            isRequired: true,
          ),
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('انصراف')),
          FilledButton(
            onPressed: () async {
              if (selected == null || (selected!.id).isEmpty) return;
              try {
                await _checkService.clear(checkId: row['id'] as int, body: {
                  'bank_account_id': int.tryParse(selected!.id) ?? 0,
                  'auto_post': true,
                });
                if (mounted) Navigator.pop(ctx);
                _refresh();
              } catch (e) {
                if (mounted) Navigator.pop(ctx);
                ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('خطا: $e')));
              }
            },
            child: const Text('ثبت'),
          ),
        ],
      ),
    );
  }

  Future<void> _openPayDialog(BuildContext context, Map<String, dynamic> row) async {
    // پرداخت چک پرداختنی (pay)
    await _openClearDialog(context, row);
  }

  Future<void> _confirmReturn(BuildContext context, Map<String, dynamic> row) async {
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('عودت چک'),
        content: const Text('آیا از عودت این چک مطمئن هستید؟'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('خیر')),
          FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('بله')),
        ],
      ),
    );
    if (ok != true) return;
    try {
      await _checkService.returnCheck(checkId: row['id'] as int, body: {'auto_post': true});
      _refresh();
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('خطا: $e')));
    }
  }

  Future<void> _confirmBounce(BuildContext context, Map<String, dynamic> row) async {
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('برگشت چک'),
        content: const Text('آیا از برگشت این چک مطمئن هستید؟'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('خیر')),
          FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('بله')),
        ],
      ),
    );
    if (ok != true) return;
    try {
      await _checkService.bounce(checkId: row['id'] as int, body: {'auto_post': true});
      _refresh();
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('خطا: $e')));
    }
  }

  Future<void> _confirmDeposit(BuildContext context, Map<String, dynamic> row) async {
    final ok = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('سپرده چک به بانک'),
        content: const Text('چک به اسناد در جریان وصول منتقل می‌شود.'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('انصراف')),
          FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('تایید')),
        ],
      ),
    );
    if (ok != true) return;
    try {
      await _checkService.deposit(checkId: row['id'] as int, body: {'auto_post': true});
      _refresh();
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('خطا: $e')));
    }
  }
}