import { useState, useEffect } from 'react';
import { useRouter } from 'next/router';
import Head from 'next/head';
import { toast } from 'react-hot-toast';
import {
  MagnifyingGlassIcon,
  PhoneIcon,
  ChevronLeftIcon,
  ChevronRightIcon,
  PlayIcon,
  StopIcon,
  EyeIcon
} from '@heroicons/react/24/outline';
import { supabase, TABLES } from '@/lib/supabase';
import { getDemoData } from '@/lib/demo-data';
import { Call } from '@/types';
import { formatTime } from '@/utils';
import Layout from '@/components/Layout';

interface CallFilters {
  search: string;
  status: 'all' | 'pending' | 'active' | 'ended' | 'cancelled' | 'failed';
  call_type: 'all' | 'audio' | 'video';
  call_mode: 'all' | 'ai_voice' | 'ai_video' | 'sign_language' | 'human_interpreter';
  sortBy: 'created_at' | 'duration' | 'cost';
  sortOrder: 'asc' | 'desc';
}

export default function CallsPage() {
  const [calls, setCalls] = useState<Call[]>([]);
  const [loading, setLoading] = useState(true);
  const [currentPage, setCurrentPage] = useState(1);
  const [totalPages, setTotalPages] = useState(1);
  const [totalCount, setTotalCount] = useState(0);
  const [isDemoMode, setIsDemoMode] = useState(false);
  const [filters, setFilters] = useState<CallFilters>({
    search: '',
    status: 'all',
    call_type: 'all',
    call_mode: 'all',
    sortBy: 'created_at',
    sortOrder: 'desc'
  });
  const router = useRouter();

  const pageSize = 20;

  // 获取通话记录列表
  const fetchCalls = async (page = 1) => {
    try {
      setLoading(true);
      
      // 检查是否为演示模式
      const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
      const isDemo = !supabaseUrl || supabaseUrl === 'https://demo.supabase.co' || supabaseUrl === '';
      setIsDemoMode(isDemo);
      
      if (isDemo) {
        // 使用演示数据
        const result = await getDemoData.calls();
        // 转换数据格式以匹配 Call 类型
        const formattedResult = result.map(item => ({
          ...item,
          caller_id: item.user_id,
          callee_id: item.interpreter_id,
          call_type: 'audio' as const,
          call_mode: 'human_interpreter' as const,
          end_time: item.end_time || undefined,
          room_sid: undefined,
          twilio_call_sid: undefined,
          quality_rating: undefined,
          currency: 'CNY' as const,
          updated_at: item.created_at
        }));
        setCalls(formattedResult);
        setTotalCount(formattedResult.length);
        setTotalPages(Math.ceil(formattedResult.length / pageSize));
        setCurrentPage(page);
      } else {
        // 使用真实数据
        let query = supabase
          .from(TABLES.CALLS)
          .select('*', { count: 'exact' });

        // 搜索过滤
        if (filters.search) {
          query = query.or(`caller_id.ilike.%${filters.search}%,callee_id.ilike.%${filters.search}%`);
        }

        // 状态过滤
        if (filters.status !== 'all') {
          query = query.eq('status', filters.status);
        }

        // 通话类型过滤
        if (filters.call_type !== 'all') {
          query = query.eq('call_type', filters.call_type);
        }

        // 通话模式过滤
        if (filters.call_mode !== 'all') {
          query = query.eq('call_mode', filters.call_mode);
        }

        // 排序
        query = query.order(filters.sortBy, { ascending: filters.sortOrder === 'asc' });

        // 分页
        const from = (page - 1) * pageSize;
        const to = from + pageSize - 1;
        query = query.range(from, to);

        const { data, error, count } = await query;

        if (error) throw error;

        setCalls(data || []);
        setTotalCount(count || 0);
        setTotalPages(Math.ceil((count || 0) / pageSize));
        setCurrentPage(page);
      }

    } catch (error) {
      console.error('Error fetching calls:', error);
      toast.error('获取通话记录失败');
      
      // 如果真实数据获取失败，切换到演示模式
      if (!isDemoMode) {
        setIsDemoMode(true);
        const result = await getDemoData.calls();
        const formattedResult = result.map(item => ({
          ...item,
          caller_id: item.user_id,
          callee_id: item.interpreter_id,
          call_type: 'audio' as const,
          call_mode: 'human_interpreter' as const,
          end_time: item.end_time || undefined,
          room_sid: undefined,
          twilio_call_sid: undefined,
          quality_rating: undefined,
          currency: 'CNY' as const,
          updated_at: item.created_at
        }));
        setCalls(formattedResult);
        setTotalCount(formattedResult.length);
        setTotalPages(Math.ceil(formattedResult.length / pageSize));
        setCurrentPage(page);
      }
    } finally {
      setLoading(false);
    }
  };

  // 处理筛选变更
  const handleFilterChange = (key: keyof CallFilters, value: any) => {
    setFilters(prev => ({
      ...prev,
      [key]: value
    }));
  };

  // 应用筛选
  const applyFilters = () => {
    setCurrentPage(1);
    fetchCalls(1);
  };

  // 重置筛选
  const resetFilters = () => {
    setFilters({
      search: '',
      status: 'all',
      call_type: 'all',
      call_mode: 'all',
      sortBy: 'created_at',
      sortOrder: 'desc'
    });
    setCurrentPage(1);
    fetchCalls(1);
  };

  // 获取状态颜色
  const getStatusColor = (status: string) => {
    switch (status) {
      case 'active':
        return 'bg-green-100 text-green-800';
      case 'pending':
        return 'bg-yellow-100 text-yellow-800';
      case 'ended':
        return 'bg-blue-100 text-blue-800';
      case 'cancelled':
        return 'bg-red-100 text-red-800';
      case 'failed':
        return 'bg-red-100 text-red-800';
      default:
        return 'bg-gray-100 text-gray-800';
    }
  };

  // 获取状态文本
  const getStatusText = (status: string) => {
    switch (status) {
      case 'active':
        return '进行中';
      case 'pending':
        return '待接听';
      case 'ended':
        return '已结束';
      case 'cancelled':
        return '已取消';
      case 'failed':
        return '失败';
      default:
        return '未知';
    }
  };

  // 获取通话类型文本
  const getCallTypeText = (type: string) => {
    switch (type) {
      case 'audio':
        return '语音通话';
      case 'video':
        return '视频通话';
      default:
        return '未知';
    }
  };

  // 获取通话模式文本
  const getCallModeText = (mode: string) => {
    switch (mode) {
      case 'ai_voice':
        return 'AI语音';
      case 'ai_video':
        return 'AI视频';
      case 'sign_language':
        return '手语翻译';
      case 'human_interpreter':
        return '人工翻译';
      default:
        return '未知';
    }
  };

  // 格式化时长
  const formatDuration = (seconds?: number) => {
    if (!seconds) return '-';
    const minutes = Math.floor(seconds / 60);
    const remainingSeconds = seconds % 60;
    return `${minutes}分${remainingSeconds}秒`;
  };

  useEffect(() => {
    fetchCalls();
  }, []);

  return (
    <Layout>
      <Head>
        <title>通话记录 - 口译服务管理后台</title>
      </Head>

      <div className="max-w-7xl mx-auto py-6 sm:px-6 lg:px-8">
        <div className="px-4 py-6 sm:px-0">
          {/* 页面标题 */}
          <div className="flex items-center justify-between mb-6">
            <h1 className="text-2xl font-bold text-gray-900">通话记录</h1>
          </div>

          {/* 搜索和筛选 */}
          <div className="bg-white shadow rounded-lg mb-6">
            <div className="px-4 py-5 sm:p-6">
              <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-5">
                {/* 搜索框 */}
                <div className="lg:col-span-1">
                  <div className="relative">
                    <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                      <MagnifyingGlassIcon className="h-5 w-5 text-gray-400" />
                    </div>
                    <input
                      type="text"
                      placeholder="搜索用户ID..."
                      value={filters.search}
                      onChange={(e) => handleFilterChange('search', e.target.value)}
                      className="block w-full pl-10 pr-3 py-2 border border-gray-300 rounded-md leading-5 bg-white placeholder-gray-500 focus:outline-none focus:placeholder-gray-400 focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                    />
                  </div>
                </div>

                {/* 状态筛选 */}
                <div>
                  <select
                    value={filters.status}
                    onChange={(e) => handleFilterChange('status', e.target.value)}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="all">全部状态</option>
                    <option value="active">进行中</option>
                    <option value="pending">待接听</option>
                    <option value="ended">已结束</option>
                    <option value="cancelled">已取消</option>
                    <option value="failed">失败</option>
                  </select>
                </div>

                {/* 通话类型筛选 */}
                <div>
                  <select
                    value={filters.call_type}
                    onChange={(e) => handleFilterChange('call_type', e.target.value)}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="all">全部类型</option>
                    <option value="audio">语音通话</option>
                    <option value="video">视频通话</option>
                  </select>
                </div>

                {/* 通话模式筛选 */}
                <div>
                  <select
                    value={filters.call_mode}
                    onChange={(e) => handleFilterChange('call_mode', e.target.value)}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="all">全部模式</option>
                    <option value="ai_voice">AI语音</option>
                    <option value="ai_video">AI视频</option>
                    <option value="sign_language">手语翻译</option>
                    <option value="human_interpreter">人工翻译</option>
                  </select>
                </div>

                {/* 排序 */}
                <div>
                  <select
                    value={`${filters.sortBy}-${filters.sortOrder}`}
                    onChange={(e) => {
                      const [sortBy, sortOrder] = e.target.value.split('-');
                      handleFilterChange('sortBy', sortBy);
                      handleFilterChange('sortOrder', sortOrder);
                    }}
                    className="block w-full px-3 py-2 border border-gray-300 rounded-md bg-white focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
                  >
                    <option value="created_at-desc">创建时间 (新到旧)</option>
                    <option value="created_at-asc">创建时间 (旧到新)</option>
                    <option value="duration-desc">时长 (长到短)</option>
                    <option value="duration-asc">时长 (短到长)</option>
                    <option value="cost-desc">费用 (高到低)</option>
                    <option value="cost-asc">费用 (低到高)</option>
                  </select>
                </div>
              </div>

              <div className="mt-4 flex space-x-3">
                <button
                  onClick={applyFilters}
                  className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700"
                >
                  应用筛选
                </button>
                <button
                  onClick={resetFilters}
                  className="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50"
                >
                  重置
                </button>
              </div>
            </div>
          </div>

          {/* 通话记录列表 */}
          {loading ? (
            <div className="flex items-center justify-center py-12">
              <div className="loading-spinner"></div>
            </div>
          ) : calls.length === 0 ? (
            <div className="text-center py-12">
              <PhoneIcon className="mx-auto h-12 w-12 text-gray-400" />
              <h3 className="mt-2 text-sm font-medium text-gray-900">暂无通话记录</h3>
              <p className="mt-1 text-sm text-gray-500">
                调整筛选条件或检查数据源
              </p>
            </div>
          ) : (
            <div className="bg-white shadow overflow-hidden sm:rounded-md">
              <div className="px-4 py-5 sm:p-6">
                <div className="flex items-center justify-between mb-4">
                  <h3 className="text-lg leading-6 font-medium text-gray-900">
                    通话记录 ({totalCount} 条记录)
                  </h3>
                </div>

                <div className="overflow-x-auto">
                  <table className="min-w-full divide-y divide-gray-200">
                    <thead className="bg-gray-50">
                      <tr>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          通话信息
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          类型/模式
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          时长
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          费用
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          状态
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          开始时间
                        </th>
                        <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                          操作
                        </th>
                      </tr>
                    </thead>
                    <tbody className="bg-white divide-y divide-gray-200">
                      {calls.map((call) => (
                        <tr key={call.id} className="hover:bg-gray-50">
                          <td className="px-6 py-4 whitespace-nowrap">
                            <div>
                              <div className="text-sm font-medium text-gray-900">
                                {call.id}
                              </div>
                              <div className="text-sm text-gray-500">
                                主叫: {call.caller_id}
                              </div>
                              {call.callee_id && (
                                <div className="text-sm text-gray-500">
                                  被叫: {call.callee_id}
                                </div>
                              )}
                            </div>
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap">
                            <div className="text-sm text-gray-900">
                              {getCallTypeText(call.call_type)}
                            </div>
                            <div className="text-sm text-gray-500">
                              {getCallModeText(call.call_mode)}
                            </div>
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                            {formatDuration(call.duration)}
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap">
                            <span className="text-sm font-medium text-gray-900">
                              ¥{call.cost.toFixed(2)}
                            </span>
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap">
                            <span className={`inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${getStatusColor(call.status)}`}>
                              {call.status === 'active' && <PlayIcon className="h-3 w-3 mr-1" />}
                              {call.status === 'ended' && <StopIcon className="h-3 w-3 mr-1" />}
                              {getStatusText(call.status)}
                            </span>
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                            {formatTime(call.start_time)}
                          </td>
                          <td className="px-6 py-4 whitespace-nowrap text-sm font-medium">
                            <button
                              className="text-blue-600 hover:text-blue-900 mr-3"
                              onClick={() => {
                                // 查看通话详情
                                toast.success('查看通话详情功能待实现');
                              }}
                            >
                              <EyeIcon className="h-4 w-4" />
                            </button>
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>

                {/* 分页 */}
                {totalPages > 1 && (
                  <div className="mt-6 flex items-center justify-between">
                    <div className="flex-1 flex justify-between sm:hidden">
                      <button
                        onClick={() => fetchCalls(currentPage - 1)}
                        disabled={currentPage === 1}
                        className="relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 disabled:opacity-50"
                      >
                        上一页
                      </button>
                      <button
                        onClick={() => fetchCalls(currentPage + 1)}
                        disabled={currentPage === totalPages}
                        className="ml-3 relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 disabled:opacity-50"
                      >
                        下一页
                      </button>
                    </div>
                    <div className="hidden sm:flex-1 sm:flex sm:items-center sm:justify-between">
                      <div>
                        <p className="text-sm text-gray-700">
                          显示第 <span className="font-medium">{(currentPage - 1) * pageSize + 1}</span> 到{' '}
                          <span className="font-medium">
                            {Math.min(currentPage * pageSize, totalCount)}
                          </span>{' '}
                          条，共 <span className="font-medium">{totalCount}</span> 条记录
                        </p>
                      </div>
                      <div>
                        <nav className="relative z-0 inline-flex rounded-md shadow-sm -space-x-px">
                          <button
                            onClick={() => fetchCalls(currentPage - 1)}
                            disabled={currentPage === 1}
                            className="relative inline-flex items-center px-2 py-2 rounded-l-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50 disabled:opacity-50"
                          >
                            <ChevronLeftIcon className="h-5 w-5" />
                          </button>
                          {[...Array(Math.min(totalPages, 5))].map((_, i) => {
                            const page = i + 1;
                            return (
                              <button
                                key={page}
                                onClick={() => fetchCalls(page)}
                                className={`relative inline-flex items-center px-4 py-2 border text-sm font-medium ${
                                  page === currentPage
                                    ? 'z-10 bg-blue-50 border-blue-500 text-blue-600'
                                    : 'bg-white border-gray-300 text-gray-500 hover:bg-gray-50'
                                }`}
                              >
                                {page}
                              </button>
                            );
                          })}
                          <button
                            onClick={() => fetchCalls(currentPage + 1)}
                            disabled={currentPage === totalPages}
                            className="relative inline-flex items-center px-2 py-2 rounded-r-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50 disabled:opacity-50"
                          >
                            <ChevronRightIcon className="h-5 w-5" />
                          </button>
                        </nav>
                      </div>
                    </div>
                  </div>
                )}
              </div>
            </div>
          )}
        </div>
      </div>
    </Layout>
  );
}