import 'package:drift/drift.dart' show Value;
import '../data/db.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../providers/db_provider.dart';
import '../theme/app_theme.dart';

class AccountsScreen extends ConsumerWidget {
  const AccountsScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final all = ref.watch(openAccountsProvider);
    final query = ref.watch(searchQueryProvider).toLowerCase();
    final accounts = query.isEmpty
        ? all
        : all.where((a) => a.name.toLowerCase().contains(query)).toList();

    return ListView(
      padding: const EdgeInsets.fromLTRB(16, 8, 16, 90),
      children: [
        ...accounts.map((a) => _AccountCard(account: a)),
      ],
    );
  }
}

class _AccountCard extends ConsumerWidget {
  final Account account;
  const _AccountCard({required this.account});

  IconData _icon() {
    switch (account.type) {
      case 'savings': return Icons.savings_outlined;
      case 'credit': return Icons.credit_card_outlined;
      case 'cash': return Icons.money_outlined;
      default: return Icons.account_balance_outlined;
    }
  }

  String _label() {
    switch (account.type) {
      case 'checking': return 'Compte courant';
      case 'savings': return 'Épargne';
      case 'credit': return 'Carte de crédit';
      case 'cash': return 'Espèces';
      default: return account.type;
    }
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return Card(
      margin: const EdgeInsets.only(bottom: 8),
      child: ListTile(
        leading: CircleAvatar(
          backgroundColor: Theme.of(context).colorScheme.primaryContainer,
          child: Icon(_icon(), color: Theme.of(context).colorScheme.onSurfaceVariant, size: 22),
        ),
        title: Text(account.name, style: Theme.of(context).textTheme.bodyMedium?.copyWith(fontWeight: FontWeight.w600)),
        subtitle: Text(_label(), style: Theme.of(context).textTheme.bodySmall),
        trailing: Text(
          formatCurrency(account.balance),
          style: Theme.of(context).textTheme.titleMedium?.copyWith(
                fontWeight: FontWeight.w700,
                color: account.balance >= 0 ? Theme.of(context).colorScheme.primary : Theme.of(context).colorScheme.error,
              ),
        ),
        onTap: () => _editAccount(context, ref, account),
      ),
    );
  }

  Future<void> _editAccount(BuildContext context, WidgetRef ref, Account account) async {
    final db = ref.read(dbProvider);
    final nameCtrl = TextEditingController(text: account.name);
    final balanceCtrl = TextEditingController(text: account.balance.toStringAsFixed(2));
    String type = account.type;

    await showDialog(
      context: context,
      builder: (ctx) => StatefulBuilder(
        builder: (context, setDialogState) => AlertDialog(
          title: const Text('Modifier le compte'),
          content: SingleChildScrollView(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                TextField(
                  controller: nameCtrl,
                  decoration: const InputDecoration(labelText: 'Nom', hintText: 'Ex: Compte courant'),
                ),
                const SizedBox(height: 12),
                TextField(
                  controller: balanceCtrl,
                  decoration: const InputDecoration(labelText: 'Solde', hintText: '0,00'),
                  keyboardType: const TextInputType.numberWithOptions(decimal: true),
                ),
                const SizedBox(height: 12),
                DropdownMenu<String>(
                  initialSelection: type,
                  label: const Text('Type'),
                  enableSearch: false,
                  expandedInsets: EdgeInsets.zero,
                  dropdownMenuEntries: const [
                    DropdownMenuEntry(value: 'checking', label: 'Compte courant'),
                    DropdownMenuEntry(value: 'savings', label: 'Épargne'),
                    DropdownMenuEntry(value: 'credit', label: 'Carte de crédit'),
                    DropdownMenuEntry(value: 'cash', label: 'Espèces'),
                  ],
                  onSelected: (v) {
                    if (v != null) {
                      type = v;
                      setDialogState(() {});
                    }
                  },
                ),
              ],
            ),
          ),
          actions: [
            TextButton(
              onPressed: () async {
                await (db.delete(db.accounts)..where((t) => t.id.equals(account.id))).go();
                if (ctx.mounted) Navigator.pop(ctx);
              },
              style: TextButton.styleFrom(foregroundColor: Theme.of(context).colorScheme.error),
              child: const Text('Supprimer'),
            ),
            const SizedBox(width: 8),
            FilledButton.tonal(
              onPressed: () => Navigator.pop(ctx),
              child: const Text('Annuler'),
            ),
            FilledButton(
              onPressed: () async {
                final name = nameCtrl.text.trim();
                final balanceStr = balanceCtrl.text.trim().replaceAll(',', '.');
                final balance = double.tryParse(balanceStr);
                if (name.isEmpty || balance == null) return;
                await (db.update(db.accounts)..where((t) => t.id.equals(account.id))).write(AccountsCompanion(
                  name: Value(name),
                  type: Value(type),
                  balance: Value(balance),
                ));
                if (ctx.mounted) Navigator.pop(ctx);
              },
              child: const Text('Enregistrer'),
            ),
          ],
        ),
      ),
    );
    nameCtrl.dispose();
    balanceCtrl.dispose();
  }
}