// widgets/finance_entry_dialog.dart — 登记收支弹窗（财务屏 head 按钮 + 往来抽屉共用）。
// 字段：类型(收款/付款) + 往来单位(可搜索，选填) + 金额 + 日期 + 备注。
// 相比旧版补上了往来单位选择（修复手动收付款 partner_id 恒 NULL 的缺口）。
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/intl.dart';

import '../core/responsive/responsive.dart';
import '../core/theme/context_tokens.dart';
import '../core/utils/clock.dart';
import '../core/utils/dialog_util.dart';
import '../providers/finance_provider.dart';
import '../providers/partner_provider.dart';
import 'date_picker_field.dart';
import 'ds/ds_atoms.dart';
import 'searchable_option_field.dart';
import 'ds/ds_toast.dart';

/// 打开登记收支弹窗；[type]='receipt'|'payment' 预选类型，[partnerId] 预选往来单位。
Future<void> showFinanceEntryDialog(
  BuildContext context, {
  String type = 'receipt',
  int? partnerId,
}) {
  return showAppDialog(
    context: context,
    builder: (_) => _FinanceEntryDialog(type: type, partnerId: partnerId),
  );
}

class _FinanceEntryDialog extends ConsumerStatefulWidget {
  final String type;
  final int? partnerId;
  const _FinanceEntryDialog({required this.type, this.partnerId});

  @override
  ConsumerState<_FinanceEntryDialog> createState() =>
      _FinanceEntryDialogState();
}

class _FinanceEntryDialogState extends ConsumerState<_FinanceEntryDialog> {
  final _formKey = GlobalKey<FormState>();
  final _amountCtrl = TextEditingController();
  final _remarkCtrl = TextEditingController();
  late String _type = widget.type;
  late int? _partnerId = widget.partnerId;
  late String _date = DateFormat('yyyy-MM-dd').format(appNow());
  bool _saving = false;

  @override
  void dispose() {
    _amountCtrl.dispose();
    _remarkCtrl.dispose();
    super.dispose();
  }

  Future<void> _save() async {
    if (!_formKey.currentState!.validate()) return;
    setState(() => _saving = true);
    try {
      await ref.read(financeRepositoryProvider).create({
        'type': _type,
        'amount': double.parse(_amountCtrl.text.trim()),
        'record_date': _date,
        if (_partnerId != null) 'partner_id': _partnerId,
        if (_remarkCtrl.text.trim().isNotEmpty)
          'remark': _remarkCtrl.text.trim(),
      });
      // 刷新流水 + 汇总
      ref.read(financeListProvider.notifier).reload();
      ref.invalidate(financePartnerRowsProvider);
      if (mounted) {
        Navigator.of(context).pop();
        showDsToast(context, _type == 'receipt' ? '收款已登记 ✓' : '付款已登记 ✓',
            bg: context.tokens.success);
      }
    } catch (e) {
      if (mounted) {
        showDsToast(context, '登记失败：$e', bg: context.tokens.danger);
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final partners = ref.watch(allPartnersProvider).valueOrNull?.data ?? [];
    return AlertDialog(
      title: const Text('登记收支'),
      content: SizedBox(
        width: context.dialogWidth(420),
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
                Expanded(
                  child: DsField('类型',
                      required: true,
                      input: DsSelect<String>(
                        value: _type,
                        options: const [('receipt', '收款'), ('payment', '付款')],
                        onChanged: (v) => setState(() => _type = v),
                      )),
                ),
                const SizedBox(width: 14),
                Expanded(
                  child: DsField('金额',
                      required: true,
                      input: TextFormField(
                        controller: _amountCtrl,
                        keyboardType: const TextInputType.numberWithOptions(
                            decimal: true),
                        decoration: const InputDecoration(
                            hintText: '0.00', prefixText: '¥ '),
                        validator: (v) {
                          final n = double.tryParse((v ?? '').trim());
                          return (n == null || n <= 0) ? '请输入正确金额' : null;
                        },
                      )),
                ),
              ]),
              const SizedBox(height: 14),
              DsField('往来单位（选填）',
                  input: SearchableOptionField(
                    options: [
                      for (final p in partners)
                        OptionItem(id: p.id, name: p.name),
                    ],
                    selectedId: _partnerId,
                    hint: '选择或搜索往来单位…',
                    dialogTitle: '选择往来单位',
                    onChanged: (id) => setState(() => _partnerId = id),
                  )),
              const SizedBox(height: 14),
              DsField('日期',
                  required: true,
                  input: DatePickerField(
                    value: _date,
                    isRequired: true,
                    onChanged: (v) => setState(() => _date = v ?? _date),
                  )),
              const SizedBox(height: 14),
              DsField('备注',
                  input: TextFormField(
                    controller: _remarkCtrl,
                    decoration: const InputDecoration(hintText: '备注说明（选填）'),
                    maxLines: 2,
                  )),
            ],
          ),
        ),
      ),
      actions: [
        DsButton('取消',
            onPressed: _saving ? null : () => Navigator.of(context).pop()),
        DsButton(_saving ? '保存中…' : '保存',
            variant: DsBtnVariant.primary, onPressed: _saving ? null : _save),
      ],
    );
  }
}