import 'package:flutter/material.dart';

import '../data/variety_repository.dart';
import '../db/enums.dart';
import '../i18n/strings.g.dart';
import 'theme.dart';

/// Opens the "record a sale" sheet. Optionally pre-attached to [varietyId]
/// (when opened from a variety's detail).
Future<void> showSaleSheet(
  BuildContext context, {
  required VarietyRepository repository,
  String? varietyId,
}) {
  return showModalBottomSheet<void>(
    context: context,
    isScrollControlled: true,
    builder: (_) => _SaleSheet(repository: repository, varietyId: varietyId),
  );
}

class _SaleSheet extends StatefulWidget {
  const _SaleSheet({required this.repository, this.varietyId});

  final VarietyRepository repository;
  final String? varietyId;

  @override
  State<_SaleSheet> createState() => _SaleSheetState();
}

class _SaleSheetState extends State<_SaleSheet> {
  SaleDirection _direction = SaleDirection.iSold;
  final _counterparty = TextEditingController();
  final _amount = TextEditingController();
  final _currency = TextEditingController();
  final _note = TextEditingController();
  bool _saving = false;

  @override
  void dispose() {
    _counterparty.dispose();
    _amount.dispose();
    _currency.dispose();
    _note.dispose();
    super.dispose();
  }

  String? _nullIfBlank(String s) => s.trim().isEmpty ? null : s.trim();

  Future<void> _save() async {
    setState(() => _saving = true);
    await widget.repository.createSale(
      direction: _direction,
      varietyId: widget.varietyId,
      counterparty: _nullIfBlank(_counterparty.text),
      amount: double.tryParse(_amount.text.trim().replaceAll(',', '.')),
      currency: _nullIfBlank(_currency.text),
      note: _nullIfBlank(_note.text),
    );
    if (mounted) Navigator.of(context).pop();
  }

  @override
  Widget build(BuildContext context) {
    final t = context.t;
    return Padding(
      padding: EdgeInsets.only(
        left: 16,
        right: 16,
        top: 16,
        bottom: MediaQuery.of(context).viewInsets.bottom + 16,
      ),
      child: SingleChildScrollView(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Text(t.sale.add, style: Theme.of(context).textTheme.titleLarge),
            const SizedBox(height: 4),
            Text(t.sale.help,
                style: const TextStyle(color: seedMuted, fontSize: 13)),
            const SizedBox(height: 16),
            Text(t.sale.direction,
                style: Theme.of(context).textTheme.labelLarge),
            const SizedBox(height: 6),
            for (final d in SaleDirection.values)
              ListTile(
                key: Key('sale.direction.${d.name}'),
                contentPadding: EdgeInsets.zero,
                leading: Icon(
                  _direction == d
                      ? Icons.radio_button_checked
                      : Icons.radio_button_unchecked,
                  color: _direction == d ? seedGreen : seedMuted,
                ),
                title: Text(
                    d == SaleDirection.iSold ? t.sale.iSold : t.sale.iBought),
                onTap: () => setState(() => _direction = d),
              ),
            const SizedBox(height: 8),
            TextField(
              key: const Key('sale.counterparty'),
              controller: _counterparty,
              textCapitalization: TextCapitalization.words,
              decoration: InputDecoration(
                labelText: t.sale.counterparty,
                helperText: t.sale.counterpartyHint,
                border: const OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 12),
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Expanded(
                  child: TextField(
                    key: const Key('sale.amount'),
                    controller: _amount,
                    keyboardType: const TextInputType.numberWithOptions(
                        decimal: true),
                    decoration: InputDecoration(
                      labelText: t.sale.amount,
                      border: const OutlineInputBorder(),
                    ),
                  ),
                ),
                const SizedBox(width: 12),
                Expanded(
                  child: TextField(
                    key: const Key('sale.currency'),
                    controller: _currency,
                    decoration: InputDecoration(
                      labelText: t.sale.currency,
                      border: const OutlineInputBorder(),
                    ),
                    onChanged: (_) => setState(() {}),
                  ),
                ),
              ],
            ),
            const SizedBox(height: 8),
            // Quick picks so a currency is one tap. Ğ1 sits quietly among the
            // familiar ones — offered, never imposed — and free text still takes
            // anything else.
            Wrap(
              spacing: 8,
              children: [
                for (final c in ['€', 'Ğ1', t.sale.hours])
                  ChoiceChip(
                    key: Key('sale.currencyChip.$c'),
                    label: Text(c),
                    selected: _currency.text.trim() == c,
                    onSelected: (sel) => setState(() {
                      _currency.text = sel ? c : '';
                    }),
                  ),
              ],
            ),
            const SizedBox(height: 12),
            TextField(
              key: const Key('sale.note'),
              controller: _note,
              minLines: 1,
              maxLines: 3,
              decoration: InputDecoration(
                labelText: t.sale.note,
                border: const OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 20),
            FilledButton(
              key: const Key('sale.save'),
              onPressed: _saving ? null : _save,
              child: Text(t.sale.save),
            ),
          ],
        ),
      ),
    );
  }
}