import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:siro_admin/constant/theme.dart';
import 'package:siro_admin/controller/admin/withdrawal_controller.dart';

/// شاشة طلبات سحب أرصدة السائقين.
/// تتبع لغة تصميم شاشة الرحلات: أسطح محايدة، واللون للمعنى وحده.
class WithdrawalRequestsPage extends StatelessWidget {
  const WithdrawalRequestsPage({super.key});

  static const _filters = <String, String>{
    'pending': 'معلّقة',
    'approved': 'معتمدة',
    'paid': 'مدفوعة',
    'rejected': 'مرفوضة',
    'all': 'الكل',
  };

  @override
  Widget build(BuildContext context) {
    final cs = Theme.of(context).colorScheme;

    return Scaffold(
      backgroundColor: cs.surface,
      body: GetBuilder<WithdrawalController>(
        init: Get.isRegistered<WithdrawalController>()
            ? Get.find<WithdrawalController>()
            : WithdrawalController(),
        builder: (ctrl) {
          return Column(
            children: [
              _buildHeader(context, ctrl, cs),
              _buildTotals(ctrl, cs),
              _buildFilterBar(ctrl, cs),
              Expanded(
                child: ctrl.isLoading
                    ? Center(child: CircularProgressIndicator(color: cs.primary))
                    : _buildList(ctrl, cs),
              ),
            ],
          );
        },
      ),
    );
  }

  Widget _buildHeader(
      BuildContext context, WithdrawalController ctrl, ColorScheme cs) {
    return Container(
      padding: const EdgeInsets.fromLTRB(16, 50, 16, 16),
      decoration: BoxDecoration(
        color: cs.surface,
        border: Border(bottom: BorderSide(color: cs.outline)),
      ),
      child: Row(
        children: [
          GestureDetector(
            onTap: () => Get.back(),
            child: Container(
              padding: const EdgeInsets.all(8),
              decoration: BoxDecoration(
                color: cs.surfaceContainerHighest,
                borderRadius: BorderRadius.circular(10),
                border: Border.all(color: cs.outline),
              ),
              child: Icon(Icons.arrow_back_ios_new_rounded,
                  color: cs.onSurfaceVariant, size: 16),
            ),
          ),
          const SizedBox(width: 12),
          Text('طلبات السحب',
              style: TextStyle(
                  color: cs.onSurface,
                  fontSize: 18,
                  fontWeight: FontWeight.w700)),
          const Spacer(),
          IconButton(
            icon: Icon(Icons.refresh_rounded, color: cs.onSurfaceVariant),
            onPressed: () => ctrl.fetchRequests(),
          ),
        ],
      ),
    );
  }

  Widget _buildTotals(WithdrawalController ctrl, ColorScheme cs) {
    if (ctrl.totals.isEmpty) return const SizedBox.shrink();

    Widget tile(String label, String key, Color color) {
      final t = ctrl.totals[key] as Map? ?? {};
      return Expanded(
        child: Container(
          margin: const EdgeInsets.symmetric(horizontal: 4),
          padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 8),
          decoration: BoxDecoration(
            color: cs.surfaceContainerHighest,
            borderRadius: BorderRadius.circular(14),
            border: Border.all(color: color.withValues(alpha: 0.22)),
          ),
          child: Column(
            children: [
              Text('${t['count'] ?? 0}',
                  style: TextStyle(
                      color: color,
                      fontSize: 18,
                      fontWeight: FontWeight.w800)),
              const SizedBox(height: 2),
              Text(label,
                  style:
                      TextStyle(color: cs.onSurfaceVariant, fontSize: 11)),
            ],
          ),
        ),
      );
    }

    return Padding(
      padding: const EdgeInsets.fromLTRB(12, 12, 12, 4),
      child: Row(
        children: [
          tile('معلّقة', 'pending', cs.warning),
          tile('معتمدة', 'approved', cs.info),
          tile('مدفوعة', 'paid', cs.success),
          tile('مرفوضة', 'rejected', cs.danger),
        ],
      ),
    );
  }

  Widget _buildFilterBar(WithdrawalController ctrl, ColorScheme cs) {
    return SizedBox(
      height: 52,
      child: ListView(
        scrollDirection: Axis.horizontal,
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
        children: _filters.entries.map((e) {
          final selected = ctrl.filter == e.key;
          return Padding(
            padding: const EdgeInsets.only(left: 8),
            child: GestureDetector(
              onTap: () => ctrl.changeFilter(e.key),
              child: Container(
                padding:
                    const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
                decoration: BoxDecoration(
                  color: selected
                      ? cs.primary.withValues(alpha: 0.12)
                      : cs.surfaceContainerHighest,
                  borderRadius: BorderRadius.circular(10),
                  border: Border.all(
                      color: selected ? cs.primary : cs.outline),
                ),
                child: Text(
                  e.value,
                  style: TextStyle(
                    color: selected ? cs.primary : cs.onSurfaceVariant,
                    fontSize: 12,
                    fontWeight: FontWeight.w700,
                  ),
                ),
              ),
            ),
          );
        }).toList(),
      ),
    );
  }

  Widget _buildList(WithdrawalController ctrl, ColorScheme cs) {
    if (ctrl.requests.isEmpty) {
      return Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(Icons.inbox_rounded, color: cs.onSurfaceVariant, size: 40),
            const SizedBox(height: 10),
            Text('لا توجد طلبات في هذه الحالة',
                style: TextStyle(color: cs.onSurfaceVariant, fontSize: 13)),
          ],
        ),
      );
    }

    return ListView.builder(
      padding: const EdgeInsets.fromLTRB(12, 4, 12, 24),
      itemCount: ctrl.requests.length,
      itemBuilder: (_, i) => _buildCard(ctrl, ctrl.requests[i], cs),
    );
  }

  Widget _buildCard(WithdrawalController ctrl, dynamic r, ColorScheme cs) {
    final status = '${r['status'] ?? 'pending'}';
    final color = switch (status) {
      'approved' => cs.info,
      'paid' => cs.success,
      'rejected' => cs.danger,
      _ => cs.warning,
    };
    final id = int.tryParse('${r['id']}') ?? 0;
    final busy = ctrl.busyId == id;

    return Container(
      margin: const EdgeInsets.only(bottom: 10),
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: cs.surfaceContainerHighest,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: cs.outline),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Expanded(
                child: Text('${r['driver_name'] ?? 'سائق غير معروف'}',
                    style: TextStyle(
                        color: cs.onSurface,
                        fontSize: 14,
                        fontWeight: FontWeight.w700)),
              ),
              Container(
                padding:
                    const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                decoration: BoxDecoration(
                  color: color.withValues(alpha: 0.12),
                  borderRadius: BorderRadius.circular(8),
                  border: Border.all(color: color.withValues(alpha: 0.3)),
                ),
                child: Text(_filters[status] ?? status,
                    style: TextStyle(
                        color: color,
                        fontSize: 11,
                        fontWeight: FontWeight.w700)),
              ),
            ],
          ),
          const SizedBox(height: 8),
          Row(
            children: [
              Icon(Icons.payments_rounded, size: 14, color: color),
              const SizedBox(width: 6),
              Text('${r['amount'] ?? 0}',
                  style: TextStyle(
                      color: cs.onSurface,
                      fontSize: 16,
                      fontWeight: FontWeight.w800)),
              const SizedBox(width: 12),
              Icon(Icons.account_balance_wallet_outlined,
                  size: 14, color: cs.onSurfaceVariant),
              const SizedBox(width: 6),
              Expanded(
                child: Text(
                  '${r['wallet_type'] ?? ''} — ${r['wallet_number'] ?? ''}',
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style:
                      TextStyle(color: cs.onSurfaceVariant, fontSize: 12),
                ),
              ),
            ],
          ),
          const SizedBox(height: 6),
          Text('#$id · ${r['created_at'] ?? ''}',
              style: TextStyle(color: cs.onSurfaceVariant, fontSize: 11)),

          // الإجراءات تظهر بحسب ما يقبله الخادم: من pending إلى أي حالة،
          // ومن approved إلى paid فقط. أي انتقال آخر يرفضه الخادم بـ 409.
          if (status == 'pending' || status == 'approved') ...[
            const SizedBox(height: 12),
            Row(
              children: [
                if (status == 'pending') ...[
                  _action(ctrl, id, 'approved', 'اعتماد', cs.info, cs, busy),
                  const SizedBox(width: 8),
                  _action(ctrl, id, 'rejected', 'رفض', cs.danger, cs, busy),
                  const SizedBox(width: 8),
                ],
                _action(ctrl, id, 'paid', 'تم الدفع', cs.success, cs, busy),
              ],
            ),
          ],
        ],
      ),
    );
  }

  Widget _action(WithdrawalController ctrl, int id, String status, String label,
      Color color, ColorScheme cs, bool busy) {
    return Expanded(
      child: GestureDetector(
        onTap: busy ? null : () => ctrl.updateStatus(id, status),
        child: Container(
          padding: const EdgeInsets.symmetric(vertical: 9),
          alignment: Alignment.center,
          decoration: BoxDecoration(
            color: color.withValues(alpha: busy ? 0.05 : 0.12),
            borderRadius: BorderRadius.circular(10),
            border: Border.all(
                color: color.withValues(alpha: busy ? 0.15 : 0.35)),
          ),
          child: busy
              ? SizedBox(
                  width: 14,
                  height: 14,
                  child: CircularProgressIndicator(
                      strokeWidth: 2, color: color),
                )
              : Text(label,
                  style: TextStyle(
                      color: color,
                      fontSize: 12,
                      fontWeight: FontWeight.w700)),
        ),
      ),
    );
  }
}