import 'package:flutter/material.dart';
import 'package:getx_scaffold/getx_scaffold.dart';
import 'package:ln_jq_app/common/styles/theme.dart';

import 'controller.dart';

///加氢预约
class SitePage extends GetView<SiteController> {
  const SitePage({super.key});

  @override
  Widget build(BuildContext context) {
    return GetBuilder<SiteController>(
      init: SiteController(),
      id: 'site',
      builder: (_) {
        return SingleChildScrollView(child: _buildView());
      },
    );
  }

  // 主视图
  Widget _buildView() {
    return Padding(
      padding: const EdgeInsets.all(12.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          // 第一个卡片: 今日预约统计
          Card(
            elevation: 3,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0)),
            margin: const EdgeInsets.only(bottom: 12),
            child: Padding(
              padding: const EdgeInsets.symmetric(vertical: 12.0),
              child: Column(
                children: [
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 16.0),
                    child: Row(
                      children: [
                        const Icon(Icons.calendar_today, color: Colors.blue, size: 32),
                        const SizedBox(width: 12),
                        const Expanded(
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                '今日预约统计',
                                style: TextStyle(
                                  fontSize: 16,
                                  fontWeight: FontWeight.bold,
                                ),
                              ),
                              Text(
                                "Today's Reservation Statistics",
                                style: TextStyle(fontSize: 12, color: Colors.grey),
                              ),
                            ],
                          ),
                        ),
                        Container(
                          padding: const EdgeInsets.symmetric(
                            horizontal: 10,
                            vertical: 4,
                          ),
                          decoration: BoxDecoration(
                            color: Colors.blue.withOpacity(0.1),
                            borderRadius: BorderRadius.circular(12),
                          ),
                          child: const Text(
                            '实时',
                            style: TextStyle(
                              color: Colors.blue,
                              fontSize: 12,
                              fontWeight: FontWeight.bold,
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 10),
                  const Divider(height: 1, indent: 16, endIndent: 16),
                  const SizedBox(height: 12),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 16.0),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                      children: [
                        _buildStatItem(controller.leftHydrogen, '剩余余量'),
                        _buildStatItem(controller.orderAmount, '预约车辆'),
                        _buildStatItem(controller.completedAmount, '已完成'),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ),

          // 第二个卡片: 预约信息
          Card(
            elevation: 3,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0)),
            margin: const EdgeInsets.only(bottom: 12),
            clipBehavior: Clip.antiAlias,
            child: Column(
              children: [
                Container(
                  color: Colors.blue,
                  padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 12.0),
                  child: Row(
                    children: [
                      const Expanded(
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Text(
                              '预约信息',
                              style: TextStyle(
                                fontSize: 16,
                                fontWeight: FontWeight.bold,
                                color: Colors.white,
                              ),
                            ),
                            SizedBox(height: 2),
                            Text(
                              'Reservation Information',
                              style: TextStyle(fontSize: 12, color: Colors.white70),
                            ),
                          ],
                        ),
                      ),
                      ElevatedButton.icon(
                        onPressed: () {
                          controller.fetchReservationData();
                        },
                        icon: const Icon(Icons.refresh, size: 16),
                        label: const Text('刷新'),
                        style: ElevatedButton.styleFrom(
                          foregroundColor: Colors.blue,
                          backgroundColor: Colors.white,
                          padding: const EdgeInsets.symmetric(horizontal: 12),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(16),
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
                controller.hasReservationData
                    ? _buildReservationListView()
                    : _buildEmptyReservationView(),
              ],
            ),
          ),

          //第三部分
          Card(
            elevation: 3,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0)),
            margin: const EdgeInsets.only(bottom: 12),
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 12.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  _buildInfoItem(Icons.info_outline, '数据每5分钟自动刷新一次'),
                  const SizedBox(height: 8),
                  _buildInfoItem(Icons.help_outline, '点击车牌号可查看详细信息'),
                  const SizedBox(height: 8),
                  _buildInfoItem(Icons.headset_mic_outlined, '如有疑问请联系客服: 400-123-4567'),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  /// 构建单个统计项
  Widget _buildStatItem(String value, String label, {Color valueColor = Colors.blue}) {
    return Expanded(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Text(
            value,
            style: TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.bold,
              color: valueColor,
            ),
          ),
          const SizedBox(height: 4),
          Text(label, style: const TextStyle(fontSize: 14, color: Colors.grey)),
        ],
      ),
    );
  }

  /// 构建“暂无预约数据”的视图
  Widget _buildEmptyReservationView() {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.symmetric(vertical: 48.0),
      color: Colors.white,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(Icons.inventory_2_outlined, size: 80, color: Colors.grey[300]),
          const SizedBox(height: 16),
          const Text('暂无预约数据', style: TextStyle(fontSize: 16, color: Colors.black54)),
          const SizedBox(height: 8),
          const Text(
            '点击右上角刷新按钮获取最新数据',
            style: TextStyle(fontSize: 14, color: Colors.grey),
          ),
        ],
      ),
    );
  }

  /// 构建“有预约数据”的列表视图
  Widget _buildReservationListView() {
    return Container(
      color: Colors.white,
      child: ListView.separated(
        shrinkWrap: true,
        physics: const NeverScrollableScrollPhysics(),
        // 因为外层已有滚动，这里禁用内部滚动
        itemCount: controller.reservationList.length,
        padding: const EdgeInsets.all(12.0),
        itemBuilder: (context, index) {
          final item = controller.reservationList[index];
          // 调用新的方法来构建每一项
          return _buildReservationItem(index, item);
        },
        separatorBuilder: (context, index) => const SizedBox(height: 12), // 列表项之间的间距
      ),
    );
  }

  Widget _buildReservationItem(int index, ReservationModel item) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(8.0),
        border: Border.all(color: Colors.grey[200]!, width: 1.0),
        boxShadow: [
          BoxShadow(
            color: Colors.grey.withOpacity(0.1),
            spreadRadius: 1,
            blurRadius: 3,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        children: [
          // 顶部：序号、车牌号、状态
          Padding(
            padding: const EdgeInsets.fromLTRB(8, 12, 16, 12),
            child: Row(
              children: [
                // 序号
                Container(
                  width: 24,
                  height: 24,
                  alignment: Alignment.center,
                  decoration: const BoxDecoration(
                    color: Colors.blue,
                    shape: BoxShape.circle,
                  ),
                  child: Text(
                    "${index + 1}",
                    style: const TextStyle(
                      color: Colors.white,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
                const SizedBox(width: 8),
                const Icon(Icons.directions_car, color: Colors.black54),
                const SizedBox(width: 4),
                // 车牌号
                Expanded(
                  child: Text(
                    item.plateNumber,
                    style: const TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                      color: AppTheme.themeColor,
                    ),
                  ),
                ),
                // 状态标签
                _buildStatusChip(item.status),
              ],
            ),
          ),
          const Divider(height: 1),
          // 中部：详细信息
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 12.0),
            child: Column(
              children: [
                _buildDetailRow(
                  Icons.local_gas_station,
                  '加氢量',
                  item.amount,
                  valueColor: Colors.red,
                ),
                const SizedBox(height: 8),
                _buildDetailRow(Icons.access_time, '预约时间', item.time),
                const SizedBox(height: 8),
                _buildDetailRow(Icons.person, '联系人', item.contactPerson),
                const SizedBox(height: 8),
                _buildDetailRow(
                  Icons.phone,
                  '联系电话',
                  item.contactPhone,
                  valueColor: AppTheme.themeColor,
                ),
              ],
            ),
          ),
          // 底部：操作按钮 (仅在待处理时显示)
          if (item.status == ReservationStatus.pending)
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
              child: Row(
                children: [
                  Expanded(
                    child: ElevatedButton(
                      onPressed: () => controller.confirmReservation(item.id),
                      style: ElevatedButton.styleFrom(backgroundColor: Colors.blue),
                      child: const Text('确定'),
                    ),
                  ),
                  const SizedBox(width: 16),
                  Expanded(
                    child: ElevatedButton(
                      onPressed: () => controller.rejectReservation(item.id),
                      style: ElevatedButton.styleFrom(backgroundColor: Colors.red),
                      child: const Text('拒绝'),
                    ),
                  ),
                ],
              ),
            ),
        ],
      ),
    );
  }

  /// 构建状态标签
  Widget _buildStatusChip(ReservationStatus status) {
    String text;
    Color color;
    switch (status) {
      case ReservationStatus.pending:
        text = '待处理';
        color = Colors.orange;
        break;
      case ReservationStatus.completed:
        text = '已完成';
        color = Colors.greenAccent;
        break;
      case ReservationStatus.rejected:
        text = '已拒绝';
        color = Colors.red;
        break;
      default:
        text = '未知状态';
        color = Colors.grey;
        break;
    }
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: color.withOpacity(0.1),
        borderRadius: BorderRadius.circular(12),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.circle, color: color, size: 8),
          const SizedBox(width: 4),
          Text(
            text,
            style: TextStyle(color: color, fontSize: 12, fontWeight: FontWeight.bold),
          ),
        ],
      ),
    );
  }

  /// 构建信息详情行
  Widget _buildDetailRow(
    IconData icon,
    String label,
    String value, {
    Color valueColor = Colors.black87,
  }) {
    return Row(
      children: [
        Icon(icon, color: Colors.grey, size: 20),
        const SizedBox(width: 8),
        Text('$label: ', style: const TextStyle(fontSize: 14, color: Colors.grey)),
        Expanded(
          child: Text(
            value,
            style: TextStyle(
              fontSize: 14,
              color: valueColor,
              fontWeight: FontWeight.w500,
            ),
          ),
        ),
      ],
    );
  }

  /// 底部构建带图标的提示信息行
  Widget _buildInfoItem(IconData icon, String text) {
    return Row(
      children: [
        Icon(icon, color: Colors.blue, size: 20),
        const SizedBox(width: 8),
        Text(text, style: const TextStyle(fontSize: 14, color: Colors.black54)),
      ],
    );
  }
}