import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:tdesign_flutter/tdesign_flutter.dart';
import 'package:go_router/go_router.dart';
import '../../shared/widgets/nav_bar_config.dart';
import '../../core/utils/responsive.dart';
import '../../shared/widgets/form_section.dart';
import '../../shared/widgets/form_field_row.dart';

import 'expense_apply_controller.dart';
import '../../core/i18n/app_localizations.dart';
import 'expense_model.dart';
import '../../core/theme/app_colors.dart';
import '../../core/theme/app_colors_extension.dart';
import '../../core/data/mock_api_data.dart';
import 'widgets/expense_detail_edit_dialog.dart';

class ExpenseApplyPage extends ConsumerStatefulWidget {
  final String? editId;
  const ExpenseApplyPage({super.key, this.editId});

  @override
  ConsumerState<ExpenseApplyPage> createState() => _ExpenseApplyPageState();
}

class _ExpenseApplyPageState extends ConsumerState<ExpenseApplyPage> {
  final _remarkController = TextEditingController();
  final _purposeController = TextEditingController();
  final _voucherNoController = TextEditingController();
  final _bankNameController = TextEditingController(text: '中国银行');
  final _accountNameController = TextEditingController(text: '张三');

  // 关联管控
  String? _selectedProjectName;
  String? _selectedSubjectName;
  double _availableBudget = 0;

  @override
  void dispose() {
    _remarkController.dispose();
    _purposeController.dispose();
    _voucherNoController.dispose();
    _bankNameController.dispose();
    _accountNameController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final controller = ref.watch(expenseApplyProvider(widget.editId).notifier);
    final state = ref.watch(expenseApplyProvider(widget.editId));
    final r = ResponsiveHelper.of(context);
    final l10n = AppLocalizations.of(context);

    ref
        .read(navBarConfigProvider.notifier)
        .update(
          NavBarConfig(
            title: widget.editId != null
                ? l10n.get('editExpense')
                : l10n.get('expenseApply'),
            showBack: true,
            onBack: () => context.pop(),
          ),
        );
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final bottomInset = MediaQuery.of(context).padding.bottom;
    return Column(
      children: [
        Expanded(
          child: Align(
            alignment: Alignment.topCenter,
            child: ConstrainedBox(
              constraints: BoxConstraints(maxWidth: r.formMaxWidth),
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    // 1. 导入事前申请链接
                    _buildImportLink(),
                    const SizedBox(height: 16),
                    // 2. 基本信息区
                    _buildBasicInfoSection(controller, state),
                    const SizedBox(height: 16),
                    // 3. 关联管控区
                    _buildControlSection(controller, state),
                    const SizedBox(height: 16),
                    // 4. 收款账户区
                    _buildAccountSection(controller, state),
                    const SizedBox(height: 16),
                    // 5. 报销明细区
                    _buildDetailSection(controller, state),
                    const SizedBox(height: 16),
                    // 6. 附件上传区
                    _buildInvoiceSection(controller, state),
                  ],
                ),
              ),
            ),
          ),
        ),
        // 7. 底部操作栏 + iOS 横条指示器背景
        ColoredBox(
          color: colors.bgCard,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              _buildBottomButtons(controller, state),
              if (bottomInset > 0) SizedBox(height: bottomInset),
            ],
          ),
        ),
      ],
    );
  }

  // ═══ 1. 导入事前申请链接 ═══
  Widget _buildImportLink() {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final l10n = AppLocalizations.of(context);
    return GestureDetector(
      onTap: () {
        TDToast.showText(l10n.get('expenseApplyImport'), context: context);
      },
      child: Container(
        height: 44,
        decoration: BoxDecoration(
          color: colors.primaryLight,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(Icons.download, size: 14, color: colors.primary),
            const SizedBox(width: 8),
            Text(
              l10n.get('importApprovedPreApp'),
              style: TextStyle(
                fontSize: AppFontSizes.body,
                color: colors.primary,
              ),
            ),
          ],
        ),
      ),
    );
  }

  // ═══ 2. 基本信息区 ═══
  // 报销日期(只读)、报销单号(只读)、币别(TDPicker)、报销人员(只读)、报销部门(只读)、
  // 支付方式(TDPicker)、凭证号码、备注
  Widget _buildBasicInfoSection(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final l10n = AppLocalizations.of(context);
    final expense = state.expense;
    return FormSection(
      title: l10n.get('basicInfo'),
      leadingIcon: Icons.info_outline,
      children: [
        // 报销日期（只读）
        FormFieldRow(
          label: l10n.get('expenseDate'),
          value: expense.applicationDate != null
              ? '${expense.applicationDate!.year}-${expense.applicationDate!.month.toString().padLeft(2, '0')}-${expense.applicationDate!.day.toString().padLeft(2, '0')}'
              : _today(),
          readOnly: true,
          showArrow: false,
        ),
        const SizedBox(height: 16),
        // 报销单号（只读）
        FormFieldRow(
          label: l10n.get('reportNo'),
          value: expense.reportNo.isNotEmpty ? expense.reportNo : null,
          hint: l10n.get('autoGenerated'),
          readOnly: true,
          showArrow: false,
        ),
        const SizedBox(height: 16),
        // 币别（TDPicker）
        FormFieldRow(
          label: l10n.get('currency'),
          value: expense.currencyCode.isNotEmpty ? expense.currencyCode : 'CNY',
          hint: l10n.get('selectCurrency'),
          onTap: () => _showCurrencyPicker(controller, expense.currencyCode),
        ),
        const SizedBox(height: 16),
        // 报销人员（只读）
        FormFieldRow(
          label: l10n.get('applicant'),
          value: expense.applicantName.isNotEmpty
              ? expense.applicantName
              : '张三',
          readOnly: true,
          showArrow: false,
        ),
        const SizedBox(height: 16),
        // 报销部门（只读）
        FormFieldRow(
          label: l10n.get('department'),
          value: expense.deptName.isNotEmpty ? expense.deptName : '技术部',
          readOnly: true,
          showArrow: false,
        ),
        const SizedBox(height: 16),
        // 支付方式（TDPicker）
        FormFieldRow(
          label: l10n.get('paymentMethod'),
          value: expense.paymentMethod.isNotEmpty
              ? expense.paymentMethod
              : null,
          hint: l10n.get('selectPaymentMethod'),
          onTap: () => _showPaymentMethodPicker(controller),
        ),
        const SizedBox(height: 16),
        // 凭证号码
        FormFieldRow(
          label: l10n.get('voucherNo'),
          value: _voucherNoController.text.isNotEmpty
              ? _voucherNoController.text
              : null,
          hint: l10n.get('enterVoucherNo'),
          onTap: () => _showTextInput(
            l10n.get('voucherNo'),
            l10n.get('enterVoucherNo'),
            (v) => setState(() {
              _voucherNoController.text = v;
              _voucherNoController.selection = TextSelection.fromPosition(
                TextPosition(offset: v.length),
              );
            }),
            initialText: _voucherNoController.text,
          ),
        ),
        const SizedBox(height: 16),
        // 备注
        FormFieldRow(
          label: l10n.get('remark'),
          value: _remarkController.text.isNotEmpty
              ? _remarkController.text
              : null,
          hint: l10n.get('enterRemark'),
          onTap: () => _showTextInput(
            l10n.get('remark'),
            l10n.get('enterRemark'),
            (v) => setState(() {
              _remarkController.text = v;
              _remarkController.selection = TextSelection.fromPosition(
                TextPosition(offset: v.length),
              );
            }),
            initialText: _remarkController.text,
          ),
        ),
      ],
    );
  }

  // ═══ 3. 关联管控区 ═══
  // 报销事由、关联项目&预算科目(级联)、成本中心、可用预算、报销金额合计(只读)、核准金额合计(只读)
  Widget _buildControlSection(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final l10n = AppLocalizations.of(context);
    final expense = state.expense;

    final cascadeLabel = _selectedProjectName != null &&
            _selectedSubjectName != null
        ? '$_selectedProjectName / $_selectedSubjectName'
        : _selectedProjectName;

    return FormSection(
      title: l10n.get('relatedControl'),
      leadingIcon: Icons.link_outlined,
      children: [
        // 报销事由
        FormFieldRow(
          label: l10n.get('expenseReason'),
          value: _purposeController.text.isNotEmpty
              ? _purposeController.text
              : null,
          hint: l10n.get('enterExpenseReason'),
          onTap: () => _showTextInput(
            l10n.get('expenseReason'),
            l10n.get('enterExpenseReason'),
            (v) {
              setState(() {
                _purposeController.text = v;
                _purposeController.selection = TextSelection.fromPosition(
                  TextPosition(offset: v.length),
                );
              });
              controller.updatePurpose(v);
            },
            initialText: _purposeController.text,
          ),
        ),
        const SizedBox(height: 16),
        // 关联项目 & 预算科目（级联选择器，参考 ExpenseApplicationApplyPage）
        FormFieldRow(
          label: l10n.get('relatedProject'),
          value: cascadeLabel,
          hint: l10n.get('selectProjectAndSubject'),
          required: true,
          onTap: () {
            FocusScope.of(context).unfocus();
            TDCascader.showMultiCascader(
              context,
              title: l10n.get('selectProjectAndSubject'),
              data: _buildCascadeData(),
              subTitles: [
                l10n.get('project'),
                l10n.get('budgetSubject'),
              ],
              onClose: () => Navigator.of(context).pop(),
              onChange: (selected) {
                if (selected.length >= 2) {
                  final pId = int.tryParse(selected[0].value ?? '');
                  final sId = int.tryParse(selected[1].value ?? '');
                  if (pId != null && sId != null) {
                    setState(() {
                      _selectedProjectName = selected[0].label;
                      _selectedSubjectName = selected[1].label;
                      _availableBudget = getMockBudget(pId, sId);
                    });
                  }
                }
              },
            );
          },
        ),
        const SizedBox(height: 16),
        // 可用预算
        _buildBudgetRow(l10n, colors),
        const SizedBox(height: 16),
        // 成本中心
        FormFieldRow(
          label: l10n.get('costCenter'),
          value: expense.costCenterId.isNotEmpty ? expense.costCenterId : null,
          hint: l10n.get('selectCostCenter'),
          onTap: () {
            TDToast.showText(l10n.get('costCenterSelection'), context: context);
          },
        ),
      ],
    );
  }

  List<Map<String, dynamic>> _buildCascadeData() {
    return mockProjects
        .map(
          (p) => <String, dynamic>{
            'label': p.name,
            'value': p.id.toString(),
            'children': mockBudgetSubjects
                .map(
                  (s) => <String, dynamic>{
                    'label': s.name,
                    'value': s.id.toString(),
                  },
                )
                .toList(),
          },
        )
        .toList();
  }

  Widget _buildBudgetRow(AppLocalizations l10n, AppColorsExtension colors) {
    final over = _availableBudget <= 0;
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        Text(
          l10n.get('availableBudget'),
          style: TextStyle(
            fontSize: AppFontSizes.subtitle,
            color: colors.textSecondary,
          ),
        ),
        Text(
          '¥${_availableBudget.toStringAsFixed(2)}',
          style: TextStyle(
            fontSize: AppFontSizes.subtitle,
            fontWeight: FontWeight.w700,
            color: over ? colors.danger : colors.amountPrimary,
          ),
        ),
      ],
    );
  }

  // ═══ 4. 收款账户区 ═══
  // 开户行(bankName)、户名(accountName)、银行账号(bankAccount)
  Widget _buildAccountSection(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final l10n = AppLocalizations.of(context);
    return FormSection(
      title: l10n.get('receiptAccount'),
      leadingIcon: Icons.account_balance_outlined,
      children: [
        FormFieldRow(
          label: l10n.get('bankName'),
          value: _bankNameController.text.isNotEmpty
              ? _bankNameController.text
              : null,
          hint: l10n.get('selectBank'),
          onTap: () {
            TDToast.showText(l10n.get('bankSelection'), context: context);
          },
        ),
        const SizedBox(height: 16),
        FormFieldRow(
          label: l10n.get('accountName'),
          value: _accountNameController.text,
          readOnly: true,
          showArrow: false,
        ),
        const SizedBox(height: 16),
        FormFieldRow(
          label: l10n.get('bankAccount'),
          value: state.expense.bankAccount.isNotEmpty
              ? state.expense.bankAccount
              : null,
          hint: l10n.get('enterBankAccount'),
          onTap: () {
            TDToast.showText(l10n.get('bankAccountInput'), context: context);
          },
        ),
      ],
    );
  }

  // ═══ 5. 报销明细区 ═══
  Widget _buildDetailSection(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final l10n = AppLocalizations.of(context);

    final totalApproved = state.expense.details.fold<double>(
      0,
      (sum, d) => sum + d.approvedAmount,
    );

    return FormSection(
      title: l10n.get('expenseDetails'),
      leadingIcon: Icons.receipt_long_outlined,
      showAction: true,
      actionText: l10n.get('add'),
      onActionTap: () => _showAddDetailDialog(controller),
      children: [
        if (state.expense.details.isEmpty)
          Padding(
            padding: const EdgeInsets.symmetric(vertical: 8),
            child: Text(
              l10n.get('noDetailHint'),
              style: TextStyle(
                fontSize: AppFontSizes.subtitle,
                color: colors.textPlaceholder,
              ),
            ),
          )
        else
          ...state.expense.details.asMap().entries.map((entry) {
            final d = entry.value;
            return Container(
              margin: const EdgeInsets.symmetric(vertical: 8),
              padding: const EdgeInsets.all(12),
              decoration: BoxDecoration(
                color: colors.bgPage,
                borderRadius: BorderRadius.circular(8),
              ),
              child: Stack(
                children: [
                  Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      // 第一行：费用项目 + 金额含税
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Expanded(
                            child: Text(
                              d.expenseDesc.isNotEmpty
                                  ? d.expenseDesc
                                  : l10n.get('expenseName'),
                              style: TextStyle(
                                fontSize: AppFontSizes.subtitle,
                                color: colors.textPrimary,
                              ),
                            ),
                          ),
                          const SizedBox(width: 8),
                          Text(
                            '¥${d.totalAmount.toStringAsFixed(2)}',
                            style: TextStyle(
                              fontSize: AppFontSizes.subtitle,
                              fontWeight: FontWeight.w600,
                              color: colors.amountPrimary,
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 8),
                      // 第二行（小字）：金额不含税 / 核准金额 / 税金 / 税率
                      Text(
                        '${l10n.get('amountExcludingTax')}: ¥${d.amount.toStringAsFixed(2)}  '
                        '${l10n.get('approvedAmount')}: ¥${d.approvedAmount.toStringAsFixed(2)}  '
                        '${l10n.get('taxAmount')}: ¥${d.taxAmount.toStringAsFixed(2)}  '
                        '${l10n.get('taxRate')}: ${(d.taxRate * 100).toStringAsFixed(0)}%',
                        style: TextStyle(
                          fontSize: AppFontSizes.caption,
                          color: colors.textSecondary,
                        ),
                      ),
                      const SizedBox(height: 6),
                      // 第三行（小字）：客户/厂商 / 已充金额
                      Text(
                        '${l10n.get('customerVendor')}: ${d.customerVendorName.isNotEmpty ? d.customerVendorName : '--'}  '
                        '${l10n.get('offsetAmount')}: ¥${d.offsetAmount.toStringAsFixed(2)}',
                        style: TextStyle(
                          fontSize: AppFontSizes.caption,
                          color: colors.textSecondary,
                        ),
                      ),
                      const SizedBox(height: 6),
                      // 第四行（小字）：费用科目 / 项目代号 / 科目代号 / 项目类别
                      Text(
                        '${l10n.get('expenseCategory')}: ${d.expenseType.isNotEmpty ? d.expenseType : '--'}  '
                        '${l10n.get('projectCode')}: ${d.projectCode.isNotEmpty ? d.projectCode : '--'}  '
                        '${l10n.get('subjectCode')}: ${d.subjectCode.isNotEmpty ? d.subjectCode : '--'}  '
                        '${l10n.get('projectCategory')}: ${d.projectCategory.isNotEmpty ? d.projectCategory : '--'}',
                        style: TextStyle(
                          fontSize: AppFontSizes.caption,
                          color: colors.textSecondary,
                        ),
                      ),
                      // 第五行：摘要
                      if (d.remark.isNotEmpty) ...[
                        const SizedBox(height: 6),
                        Text(
                          d.remark,
                          maxLines: 2,
                          overflow: TextOverflow.ellipsis,
                          style: TextStyle(
                            fontSize: AppFontSizes.caption,
                            color: colors.textPlaceholder,
                          ),
                        ),
                      ],
                    ],
                  ),
                  // 右上角圆形删除按钮
                  Positioned(
                    right: 0,
                    top: 0,
                    child: GestureDetector(
                      onTap: () {
                        controller.removeDetail(entry.key);
                        controller.recalculateAmount();
                      },
                      child: Container(
                        width: 24,
                        height: 24,
                        decoration: BoxDecoration(
                          color: colors.primaryLight,
                          shape: BoxShape.circle,
                        ),
                        child: Icon(
                          Icons.close,
                          size: 14,
                          color: colors.primary700,
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            );
          }),
        // 报销金额合计 & 报销核准金额合计（始终显示）
        const SizedBox(height: 8),
          Container(
            height: 36,
            padding: const EdgeInsets.symmetric(vertical: 8),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Text(
                  l10n.get('totalExpense'),
                  style: TextStyle(
                    fontSize: AppFontSizes.body,
                    fontWeight: FontWeight.w600,
                    color: colors.textPrimary,
                  ),
                ),
                Text(
                  '¥${state.expense.totalAmount.toStringAsFixed(2)}',
                  style: TextStyle(
                    fontSize: AppFontSizes.subtitle,
                    fontWeight: FontWeight.w700,
                    color: colors.amountPrimary,
                  ),
                ),
              ],
            ),
          ),
          Container(
            height: 36,
            padding: const EdgeInsets.symmetric(vertical: 8),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Text(
                  l10n.get('approvedTotal'),
                  style: TextStyle(
                    fontSize: AppFontSizes.body,
                    fontWeight: FontWeight.w600,
                    color: colors.textPrimary,
                  ),
                ),
                Text(
                  '¥${totalApproved.toStringAsFixed(2)}',
                  style: TextStyle(
                    fontSize: AppFontSizes.subtitle,
                    fontWeight: FontWeight.w700,
                    color: colors.amountPrimary,
                  ),
                ),
              ],
            ),
          ),
      ],
    );
  }

  // ═══ 6. 附件上传区 ═══
  Widget _buildInvoiceSection(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final l10n = AppLocalizations.of(context);
    return FormSection(
      title: l10n.get('invoiceUpload'),
      leadingIcon: Icons.attach_file_outlined,
      children: [
        Text(
          l10n.get('maxInvoices'),
          style: TextStyle(
            fontSize: AppFontSizes.caption,
            color: colors.textPlaceholder,
          ),
        ),
        const SizedBox(height: 8),
        Wrap(
          spacing: 8,
          runSpacing: 8,
          children: [
            GestureDetector(
              onTap: () {
                TDToast.showText(
                  l10n.get('expenseApplyImport'),
                  context: context,
                );
              },
              child: Container(
                width: 80,
                height: 80,
                decoration: BoxDecoration(
                  color: colors.bgPage,
                  borderRadius: BorderRadius.circular(4),
                  border: Border.all(color: colors.border, width: 1),
                ),
                child: Center(
                  child: Icon(
                    Icons.add,
                    size: 24,
                    color: colors.textPlaceholder,
                  ),
                ),
              ),
            ),
          ],
        ),
      ],
    );
  }

  // ═══ 7. 底部操作栏 ═══
  Widget _buildBottomButtons(
    ExpenseApplyController controller,
    ExpenseApplyState state,
  ) {
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    final l10n = AppLocalizations.of(context);
    return Container(
      height: 72,
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
      decoration: BoxDecoration(color: colors.bgCard),
      child: Row(
        children: [
          // 存草稿
          Expanded(
            child: SizedBox(
              height: 40,
              child: Material(
                color: colors.bgCard,
                borderRadius: BorderRadius.circular(22),
                child: InkWell(
                  onTap: state.isSubmitting
                      ? null
                      : () async {
                          final ok = await controller.saveDraft();
                          if (!mounted) return;
                          if (ok) {
                            TDToast.showText(
                              l10n.get('draftSavedToast'),
                              context: context,
                            );
                          }
                        },
                  borderRadius: BorderRadius.circular(22),
                  child: Center(
                    child: Text(
                      l10n.get('saveDraftShort'),
                      style: TextStyle(
                        fontSize: AppFontSizes.body,
                        fontWeight: FontWeight.w500,
                        color: colors.textSecondary,
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
          const SizedBox(width: 12),
          // 重置
          Expanded(
            child: SizedBox(
              height: 40,
              child: Material(
                color: colors.bgCard,
                borderRadius: BorderRadius.circular(22),
                child: InkWell(
                  onTap: () {
                    setState(() {
                      _purposeController.clear();
                      _remarkController.clear();
                      _voucherNoController.clear();
                    });
                  },
                  borderRadius: BorderRadius.circular(22),
                  child: Center(
                    child: Text(
                      l10n.get('reset'),
                      style: TextStyle(
                        fontSize: AppFontSizes.body,
                        fontWeight: FontWeight.w500,
                        color: colors.textSecondary,
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
          const SizedBox(width: 12),
          // 保存
          Expanded(
            child: SizedBox(
              height: 40,
              child: Material(
                color: colors.primary,
                borderRadius: BorderRadius.circular(22),
                child: InkWell(
                  onTap: state.isSubmitting
                      ? null
                      : () async {
                          await controller.saveDraft();
                          if (!mounted) return;
                          context.pop();
                        },
                  borderRadius: BorderRadius.circular(22),
                  child: Center(
                    child: Text(
                      l10n.get('save'),
                      style: TextStyle(
                        fontSize: AppFontSizes.body,
                        fontWeight: FontWeight.w500,
                        color: colors.bgCard,
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  // ═══════════════════════════════════════════
  // 弹窗 / 选择器方法
  // ═══════════════════════════════════════════

  /// 添加报销明细对话框（底部滑出，参照 ExpenseDetailDialog 样式）
  Future<void> _showAddDetailDialog(ExpenseApplyController controller) async {
    final l10n = AppLocalizations.of(context);
    final result = await ExpenseDetailEditDialog.show(
      context,
      categories: mockCostCategories,
      l10n: l10n,
    );
    if (result != null && mounted) {
      final amountExclTax = result.taxRate > 0
          ? result.amount / (1 + result.taxRate)
          : result.amount;
      final taxAmount = result.amount - amountExclTax;
      controller.addDetail(
        ExpenseDetailModel(
          id: DateTime.now().millisecondsSinceEpoch.toString(),
          expenseId: '',
          expenseDate: DateTime.now(),
          expenseType: result.category,
          expenseDesc: result.expenseDesc,
          amount: amountExclTax,
          taxRate: result.taxRate,
          taxAmount: taxAmount,
          totalAmount: result.amount,
          customerVendorName: result.customerVendorName,
          offsetAmount: result.offsetAmount,
          remark: result.remark,
          baseAmount: result.amount,
          projectCode: _selectedProjectName ?? '',
          subjectCode: _selectedSubjectName ?? '',
          projectCategory: '',
        ),
      );
      controller.recalculateAmount();
    }
  }

  /// 币别选择器
  void _showCurrencyPicker(
    ExpenseApplyController controller,
    String currentCurrency,
  ) {
    final l10n = AppLocalizations.of(context);
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    const currencies = ['CNY', 'USD', 'EUR', 'JPY', 'HKD', 'GBP'];
    TDPicker.showMultiPicker(
      context,
      title: l10n.get('selectCurrency'),
      backgroundColor: colors.bgCard,
      data: [currencies],
      onConfirm: (selected) {
        if (selected.isNotEmpty && selected[0] is int) {
          final idx = selected[0] as int;
          if (idx >= 0 && idx < currencies.length) {
            Navigator.of(context).pop();
            controller.updateCurrencyCode(currencies[idx]);
          }
        }
      },
    );
  }

  /// 支付方式选择器
  void _showPaymentMethodPicker(ExpenseApplyController controller) {
    final l10n = AppLocalizations.of(context);
    final colors = Theme.of(context).extension<AppColorsExtension>()!;
    const methods = ['bankTransfer', 'cash', 'check', 'alipay', 'wechat'];
    TDPicker.showMultiPicker(
      context,
      title: l10n.get('selectPaymentMethod'),
      backgroundColor: colors.bgCard,
      data: [methods],
      onConfirm: (selected) {
        if (selected.isNotEmpty && selected[0] is int) {
          final idx = selected[0] as int;
          if (idx >= 0 && idx < methods.length) {
            Navigator.of(context).pop();
            // The controller can be extended with updatePaymentMethod if needed
            TDToast.showText(methods[idx], context: context);
          }
        }
      },
    );
  }

  /// 通用文本输入对话框
  void _showTextInput(
    String title,
    String hint,
    void Function(String) onConfirm, {
    String initialText = '',
  }) {
    final l10n = AppLocalizations.of(context);
    final c = TextEditingController(text: initialText);
    showGeneralDialog(
      context: context,
      pageBuilder: (ctx, animation, secondaryAnimation) => TDInputDialog(
        textEditingController: c,
        title: title,
        hintText: hint,
        leftBtn: TDDialogButtonOptions(
          title: l10n.get('cancel'),
          action: () => Navigator.pop(ctx),
        ),
        rightBtn: TDDialogButtonOptions(
          title: l10n.get('confirm'),
          action: () {
            onConfirm(c.text);
            Navigator.pop(ctx);
          },
        ),
      ),
    );
  }

  /// 获取今天的日期字符串
  String _today() {
    final n = DateTime.now();
    return '${n.year}-${n.month.toString().padLeft(2, '0')}-${n.day.toString().padLeft(2, '0')}';
  }
}