import { prisma } from "@/lib/db";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Package, Download, FileUp, Eye, Users, TrendingUp, Monitor, Wifi } from "lucide-react";

export const dynamic = "force-dynamic";

function getLast7Days() {
  const days: string[] = [];
  for (let i = 6; i >= 0; i--) {
    const d = new Date();
    d.setDate(d.getDate() - i);
    days.push(d.toISOString().slice(0, 10));
  }
  return days;
}

export default async function DashboardPage() {
  const today = new Date().toISOString().slice(0, 10);
  const days = getLast7Days();

  const onlineThreshold = new Date(Date.now() - 3 * 60 * 1000);

  const [
    addonCount,
    totalDownloads,
    releaseCount,
    recentReleases,
    todayPV,
    totalPV,
    todayUV,
    pvByDay,
    launcherDownloads,
    launcherUpdateDownloads,
    onlineCount,
  ] = await Promise.all([
    prisma.addon.count(),
    prisma.addon.aggregate({ _sum: { totalDownloads: true } }),
    prisma.release.count(),
    prisma.release.findMany({
      take: 5,
      orderBy: { createdAt: "desc" },
      include: { addon: { select: { name: true } } },
    }),
    prisma.pageView.count({ where: { date: today } }),
    prisma.pageView.count(),
    prisma.pageView.groupBy({
      by: ["ip"],
      where: { date: today, ip: { not: "" } },
    }).then((r) => r.length),
    prisma.pageView.groupBy({
      by: ["date"],
      where: { date: { in: days } },
      _count: true,
      orderBy: { date: "asc" },
    }),
    prisma.softwareVersion.aggregate({ _sum: { downloadCount: true } }),
    prisma.softwareVersion.aggregate({ _sum: { launcherDownloadCount: true } }),
    prisma.launcherOnline.count({ where: { lastSeen: { gte: onlineThreshold } } }),
  ]);

  const pvMap = new Map(pvByDay.map((d) => [d.date, d._count]));
  const chartData = days.map((d) => ({
    date: d.slice(5),
    pv: pvMap.get(d) || 0,
  }));
  const maxPV = Math.max(...chartData.map((d) => d.pv), 1);

  const totalSwDownloads = launcherDownloads._sum.downloadCount || 0;
  const totalLauncherUpdates = launcherUpdateDownloads._sum.launcherDownloadCount || 0;
  const webDownloads = totalSwDownloads - totalLauncherUpdates;

  const stats = [
    { title: "插件总数", value: addonCount, icon: Package },
    { title: "插件总下载量", value: totalDownloads._sum.totalDownloads || 0, icon: Download },
    { title: "版本发布数", value: releaseCount, icon: FileUp },
    { title: "启动器下载量 (网页)", value: webDownloads, icon: Monitor },
    { title: "启动器更新量 (客户端)", value: totalLauncherUpdates, icon: Download },
    { title: "启动器在线人数", value: onlineCount, icon: Wifi },
    { title: "今日访问 (PV)", value: todayPV, icon: Eye },
    { title: "今日独立访客 (UV)", value: todayUV, icon: Users },
    { title: "累计访问量", value: totalPV, icon: TrendingUp },
  ];

  return (
    <div className="space-y-8">
      <h1 className="text-3xl font-bold">仪表盘</h1>

      <div className="grid gap-4 sm:grid-cols-2 md:grid-cols-3">
        {stats.map((stat) => (
          <Card key={stat.title}>
            <CardHeader className="flex flex-row items-center justify-between pb-2">
              <CardTitle className="text-sm font-medium text-muted-foreground">
                {stat.title}
              </CardTitle>
              <stat.icon className="h-5 w-5 text-muted-foreground" />
            </CardHeader>
            <CardContent>
              <div className="text-3xl font-bold">
                {stat.value.toLocaleString()}
              </div>
            </CardContent>
          </Card>
        ))}
      </div>

      {/* 7-day PV chart */}
      <Card>
        <CardHeader>
          <CardTitle>近 7 天访问趋势</CardTitle>
          <CardDescription>页面浏览量 (PV)</CardDescription>
        </CardHeader>
        <CardContent>
          <div className="flex h-48 items-end gap-2">
            {chartData.map((d) => (
              <div key={d.date} className="flex flex-1 flex-col items-center gap-1">
                <span className="text-xs font-medium text-muted-foreground">
                  {d.pv}
                </span>
                <div
                  className="w-full rounded-t bg-primary/80 transition-all"
                  style={{
                    height: `${Math.max((d.pv / maxPV) * 160, 4)}px`,
                  }}
                />
                <span className="text-[10px] text-muted-foreground">
                  {d.date}
                </span>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle>最近发布</CardTitle>
          <CardDescription>最近发布的版本更新</CardDescription>
        </CardHeader>
        <CardContent>
          {recentReleases.length === 0 ? (
            <p className="text-sm text-muted-foreground">暂无发布记录</p>
          ) : (
            <div className="space-y-4">
              {recentReleases.map((release) => (
                <div
                  key={release.id}
                  className="flex items-center justify-between border-b pb-3 last:border-0"
                >
                  <div>
                    <p className="font-medium">{release.addon.name}</p>
                    <p className="text-sm text-muted-foreground">
                      v{release.version}
                      {release.gameVersion &&
                        ` · WoW ${release.gameVersion}`}
                    </p>
                  </div>
                  <div className="text-right text-sm text-muted-foreground">
                    <p>{release.downloadCount} 次下载</p>
                    <p>{new Date(release.createdAt).toLocaleDateString("zh-CN")}</p>
                  </div>
                </div>
              ))}
            </div>
          )}
        </CardContent>
      </Card>
    </div>
  );
}