import { useState, useEffect } from 'react';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { Plus, Settings, Bell, AlertTriangle, Clock, CheckCircle } from 'lucide-react';
import {
  ResponsiveContainer,
  AreaChart,
  Area,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
} from 'recharts';
import { alertApi } from '@/api';
import { AlertEventsTab } from './AlertEventsTab';
import { AlertRulesTab } from './AlertRulesTab';
import { AlertRuleDialog } from './AlertRuleDialog';
import { AlertChannelDialog } from './AlertChannelDialog';
import type { JsonData } from '@/types/common';

export function AlertManager() {
  const [activeTab, setActiveTab] = useState('events');
  const [alerts, setAlerts] = useState<JsonData[]>([]);
  const [rules, setRules] = useState<JsonData[]>([]);
  const [loading, setLoading] = useState(true);
  const [ruleDialogOpen, setRuleDialogOpen] = useState(false);
  const [editingRule, setEditingRule] = useState<JsonData>(null);
  const [channelDialogOpen, setChannelDialogOpen] = useState(false);
  const [notifyChannels, setNotifyChannels] = useState<JsonData[]>([]);

  const loadData = async () => {
    try {
      setLoading(true);
      const [alertsData, rulesData, channelsData] = await Promise.all([
        alertApi.getAlerts(),
        alertApi.getRules(),
        alertApi.getNotifyChannels(),
      ]);
      setAlerts((alertsData as JsonData)?.list || []);
      setRules((rulesData as JsonData)?.list || (Array.isArray(rulesData) ? rulesData : []));
      setNotifyChannels((channelsData as JsonData)?.list || []);
    } catch (error) {
      console.error('Failed to load alert data:', error);
    } finally {
      setLoading(false);
    }
  };

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

  const openCreateRule = () => {
    setEditingRule(null);
    setRuleDialogOpen(true);
  };

  const openEditRule = (rule: JsonData) => {
    setEditingRule(rule);
    setRuleDialogOpen(true);
  };

  // 告警趋势数据
  const alertTrendData = [
    { time: '00:00', critical: 2, warning: 5, info: 8 },
    { time: '04:00', critical: 1, warning: 3, info: 6 },
    { time: '08:00', critical: 3, warning: 7, info: 12 },
    { time: '12:00', critical: 5, warning: 10, info: 15 },
    { time: '16:00', critical: 4, warning: 8, info: 10 },
    { time: '20:00', critical: 3, warning: 6, info: 9 },
    { time: '24:00', critical: 2, warning: 4, info: 7 },
  ];

  return (
    <div className="space-y-6">
      {/* Page Header */}
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-slate-100">监控告警</h1>
          <p className="text-sm text-slate-500 mt-1">告警规则管理与告警事件处理</p>
        </div>
        <div className="flex items-center gap-2">
          <Button
            variant="outline"
            className="border-slate-700 text-slate-300 hover:text-slate-100 hover:bg-slate-800"
            onClick={() => setChannelDialogOpen(true)}
          >
            <Settings className="h-4 w-4 mr-2" />
            通知配置
          </Button>
          <Button className="bg-blue-600 hover:bg-blue-700 text-white" onClick={openCreateRule}>
            <Plus className="h-4 w-4 mr-2" />
            新建规则
          </Button>
        </div>
      </div>

      {/* Stats Cards */}
      <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
        <Card className="bg-slate-900 border-slate-800">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm text-slate-500">告警规则</p>
                <p className="text-2xl font-bold text-slate-100">{rules.length}</p>
              </div>
              <div className="p-3 rounded-lg bg-blue-500/10 text-blue-400">
                <Bell className="h-5 w-5" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-900 border-slate-800">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm text-slate-500">触发中</p>
                <p className="text-2xl font-bold text-red-400">
                  {alerts.filter((e) => e.status === 'firing').length}
                </p>
              </div>
              <div className="p-3 rounded-lg bg-red-500/10 text-red-400">
                <AlertTriangle className="h-5 w-5" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-900 border-slate-800">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm text-slate-500">今日告警</p>
                <p className="text-2xl font-bold text-amber-400">{alerts.length}</p>
              </div>
              <div className="p-3 rounded-lg bg-amber-500/10 text-amber-400">
                <Clock className="h-5 w-5" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-900 border-slate-800">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm text-slate-500">已恢复</p>
                <p className="text-2xl font-bold text-emerald-400">
                  {alerts.filter((e) => e.status === 'resolved').length}
                </p>
              </div>
              <div className="p-3 rounded-lg bg-emerald-500/10 text-emerald-400">
                <CheckCircle className="h-5 w-5" />
              </div>
            </div>
          </CardContent>
        </Card>
      </div>

      {/* Alert Trend Chart */}
      <Card className="bg-slate-900 border-slate-800">
        <CardHeader className="pb-2">
          <CardTitle className="text-slate-100">告警趋势</CardTitle>
          <CardDescription className="text-slate-500">过去24小时告警统计</CardDescription>
        </CardHeader>
        <CardContent>
          <div className="h-[200px]">
            <ResponsiveContainer width="100%" height="100%">
              <AreaChart data={alertTrendData}>
                <defs>
                  <linearGradient id="colorCritical" x1="0" y1="0" x2="0" y2="1">
                    <stop offset="5%" stopColor="#ef4444" stopOpacity={0.3} />
                    <stop offset="95%" stopColor="#ef4444" stopOpacity={0} />
                  </linearGradient>
                  <linearGradient id="colorWarning" x1="0" y1="0" x2="0" y2="1">
                    <stop offset="5%" stopColor="#f59e0b" stopOpacity={0.3} />
                    <stop offset="95%" stopColor="#f59e0b" stopOpacity={0} />
                  </linearGradient>
                </defs>
                <CartesianGrid strokeDasharray="3 3" stroke="#1e293b" />
                <XAxis dataKey="time" stroke="#475569" fontSize={12} />
                <YAxis stroke="#475569" fontSize={12} />
                <Tooltip
                  contentStyle={{
                    backgroundColor: '#0f172a',
                    border: '1px solid #1e293b',
                    borderRadius: '6px',
                    color: '#f8fafc',
                  }}
                />
                <Area
                  type="monotone"
                  dataKey="critical"
                  stroke="#ef4444"
                  fillOpacity={1}
                  fill="url(#colorCritical)"
                  name="严重"
                />
                <Area
                  type="monotone"
                  dataKey="warning"
                  stroke="#f59e0b"
                  fillOpacity={1}
                  fill="url(#colorWarning)"
                  name="警告"
                />
              </AreaChart>
            </ResponsiveContainer>
          </div>
        </CardContent>
      </Card>

      {/* Tabs */}
      <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full">
        <TabsList className="bg-slate-800 border border-slate-700">
          <TabsTrigger value="events" className="data-[state=active]:bg-slate-700">
            告警事件
          </TabsTrigger>
          <TabsTrigger value="rules" className="data-[state=active]:bg-slate-700">
            告警规则
          </TabsTrigger>

        </TabsList>

        <TabsContent value="events">
          <AlertEventsTab alerts={alerts} loading={loading} onReload={loadData} />
        </TabsContent>

        <TabsContent value="rules">
          <AlertRulesTab
            rules={rules}
            notifyChannels={notifyChannels}
            onReload={loadData}
            onEditRule={openEditRule}
          />
        </TabsContent>

      </Tabs>

      {/* Dialogs */}
      <AlertRuleDialog
        open={ruleDialogOpen}
        onOpenChange={setRuleDialogOpen}
        editingRule={editingRule}
        notifyChannels={notifyChannels}
        onSaved={loadData}
      />
      <AlertChannelDialog
        open={channelDialogOpen}
        onOpenChange={setChannelDialogOpen}
        notifyChannels={notifyChannels}
        onChannelsChanged={loadData}
      />
    </div>
  );
}