gcx/frontend/mobile/lib/features/wallet/presentation/pages/withdraw_page.dart

import 'package:flutter/material.dart';
import '../../../../app/i18n/app_localizations.dart';
import '../../../../app/theme/app_colors.dart';
import '../../../../app/theme/app_typography.dart';
import '../../../../app/theme/app_spacing.dart';

/// 提现页面
///
/// 将平台余额提现到银行账户
/// 展示可提现余额、手续费、到账时间
class WithdrawPage extends StatefulWidget {
  const WithdrawPage({super.key});

  @override
  State<WithdrawPage> createState() => _WithdrawPageState();
}

class _WithdrawPageState extends State<WithdrawPage> {
  final _amountController = TextEditingController();
  double _balance = 128.50;

  double get _amount => double.tryParse(_amountController.text) ?? 0;
  double get _fee => _amount * 0.005; // 0.5%
  double get _receive => _amount - _fee;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(context.t('withdraw.title'))),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // Balance
            Text(context.t('withdraw.availableBalance'), style: AppTypography.bodySmall),
            const SizedBox(height: 4),
            Text('\$${_balance.toStringAsFixed(2)}', style: AppTypography.displayMedium),
            const SizedBox(height: 24),

            // Amount Input
            Text(context.t('withdraw.amount'), style: AppTypography.h3),
            const SizedBox(height: 12),
            TextField(
              controller: _amountController,
              keyboardType: const TextInputType.numberWithOptions(decimal: true),
              decoration: InputDecoration(
                prefixText: '\$ ',
                suffixIcon: TextButton(
                  onPressed: () {
                    _amountController.text = _balance.toStringAsFixed(2);
                    setState(() {});
                  },
                  child: Text(context.t('withdraw.all')),
                ),
              ),
              style: AppTypography.priceLarge,
              onChanged: (_) => setState(() {}),
            ),
            const SizedBox(height: 24),

            // Withdraw To
            Text(context.t('withdraw.to'), style: AppTypography.h3),
            const SizedBox(height: 12),
            Container(
              padding: const EdgeInsets.all(14),
              decoration: BoxDecoration(
                color: AppColors.surface,
                borderRadius: AppSpacing.borderRadiusMd,
                border: Border.all(color: AppColors.primary),
              ),
              child: Row(
                children: [
                  const Icon(Icons.account_balance_rounded, color: AppColors.primary),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text('Bank of America •••• 6789', style: AppTypography.labelMedium),
                        Text(context.t('withdraw.savingsAccount'), style: AppTypography.caption),
                      ],
                    ),
                  ),
                  const Icon(Icons.check_circle_rounded, color: AppColors.primary, size: 20),
                ],
              ),
            ),
            const SizedBox(height: 24),

            // Fee Details
            if (_amount > 0) ...[
              Container(
                padding: AppSpacing.cardPadding,
                decoration: BoxDecoration(
                  color: AppColors.gray50,
                  borderRadius: AppSpacing.borderRadiusMd,
                ),
                child: Column(
                  children: [
                    _buildRow(context.t('withdraw.amount'), '\$${_amount.toStringAsFixed(2)}'),
                    _buildRow(context.t('withdraw.fee'), '-\$${_fee.toStringAsFixed(2)}'),
                    const Divider(height: 16),
                    _buildRow(context.t('withdraw.actualReceive'), '\$${_receive.toStringAsFixed(2)}', bold: true),
                    const SizedBox(height: 8),
                    Row(
                      children: [
                        const Icon(Icons.schedule_rounded, size: 14, color: AppColors.textTertiary),
                        const SizedBox(width: 4),
                        Text(context.t('withdraw.estimateTime'), style: AppTypography.caption),
                      ],
                    ),
                  ],
                ),
              ),
            ],
          ],
        ),
      ),
      bottomNavigationBar: Container(
        padding: const EdgeInsets.all(20),
        child: SizedBox(
          height: AppSpacing.buttonHeight,
          child: ElevatedButton(
            onPressed: _amount > 0 && _amount <= _balance ? () {} : null,
            child: Text('${context.t('withdraw.submit')} \$${_amount.toStringAsFixed(2)}'),
          ),
        ),
      ),
    );
  }

  Widget _buildRow(String label, String value, {bool bold = false}) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(label, style: AppTypography.bodyMedium.copyWith(color: AppColors.textSecondary)),
          Text(value, style: bold ? AppTypography.priceSmall : AppTypography.labelMedium),
        ],
      ),
    );
  }
}