import type { Site, SiteAccount } from "@umt/contracts";
import { ArrowRight, Camera, Globe, RefreshCw } from "lucide-react";
import { Link } from "react-router";
import { toast } from "sonner";
import { snapshotStale, useSiteAccounts, useSites, useSnapshotSite, useToggleSite } from "~/api/sites.ts";
import { EmptyState, ErrorState, LoadingState } from "~/components/console/empty-state.tsx";
import { PageHeader } from "~/components/console/page-header.tsx";
import { StatusBadge } from "~/components/console/status-badge.tsx";
import { Button } from "~/components/ui/button.tsx";
import { Switch } from "~/components/ui/switch.tsx";
import { accountSummary, circuitLabel, relTime, SITE_HEALTH } from "~/components/workbench/release-fields.ts";
import { errorMessage } from "~/lib/api.ts";

const ADAPTER_LABEL: Record<Site["adapter"], string> = {
  nexusphp: "NexusPHP",
  mteam_api: "M-Team API",
  api: "站点 API",
  generic_rss: "通用 RSS",
};

function SiteCard({ site, accounts }: { site: Site; accounts: SiteAccount[] }) {
  const toggle = useToggleSite();
  const snap = useSnapshotSite();
  const health = SITE_HEALTH[site.healthStatus];
  const account = accountSummary(accounts);
  const stale = site.snapshotEnabled && snapshotStale(site);
  const circuit = circuitLabel(site);

  return (
    <div className="pg-slab flex min-w-0 flex-col rounded-xl p-4">
      <div className="flex items-start justify-between gap-3">
        <div className="min-w-0">
          <Link
            to={`/console/sites/${site.id}`}
            className="block truncate text-lead font-semibold text-foreground hover:underline"
          >
            {site.name}
          </Link>
          <p className="truncate text-meta text-muted-foreground">
            {site.key} · {ADAPTER_LABEL[site.adapter]}
          </p>
        </div>
        <div className="flex shrink-0 items-center gap-2 text-meta text-muted-foreground">
          <label htmlFor={`site-${site.id}`}>{site.enabled ? "已启用" : "已停用"}</label>
          <Switch
            id={`site-${site.id}`}
            checked={site.enabled}
            disabled={toggle.isPending}
            aria-label={site.enabled ? "停用站点" : "启用站点"}
            onCheckedChange={(v) =>
              toggle.mutate(
                { id: site.id, enabled: v },
                {
                  onSuccess: () => toast.success(v ? `已启用 ${site.name}` : `已停用 ${site.name}`),
                  onError: (e) => toast.error(errorMessage(e)),
                },
              )
            }
          />
        </div>
      </div>

      <div className="mt-3 flex flex-wrap gap-1.5">
        <StatusBadge tone={health.tone}>{health.label}</StatusBadge>
        <StatusBadge tone={account.tone}>账号:{account.label}</StatusBadge>
        {circuit ? <StatusBadge tone="warning">{circuit}</StatusBadge> : null}
      </div>

      <dl className="mt-3 grid grid-cols-2 gap-x-4 gap-y-2 text-caption">
        <div className="min-w-0">
          <dt className="text-meta text-muted-foreground">最近快照</dt>
          <dd className="flex flex-wrap items-center gap-1.5 text-foreground">
            {site.snapshotEnabled ? relTime(site.lastSnapshotAt) : "未开启快照"}
            {stale ? <StatusBadge tone="warning">已过期</StatusBadge> : null}
          </dd>
        </div>
        <div className="min-w-0">
          <dt className="text-meta text-muted-foreground">快照周期</dt>
          <dd className="text-foreground">
            {site.snapshotIntervalSec ? `${Math.round(site.snapshotIntervalSec / 60)} 分钟` : "默认"}
          </dd>
        </div>
      </dl>

      <div className="mt-4 flex flex-wrap items-center justify-end gap-2 border-t border-border/60 pt-3">
        <Button
          variant="outline"
          size="sm"
          disabled={!site.enabled || snap.isPending}
          title={site.enabled ? "抓取快照(受站点限流)" : "站点已停用"}
          onClick={() =>
            snap.mutate(
              { id: site.id },
              {
                onSuccess: () => toast.success("快照已排队"),
                onError: (e) => toast.error(errorMessage(e)),
              },
            )
          }
        >
          <Camera />
          快照
        </Button>
        <Button asChild size="sm" variant="outline">
          <Link to={`/console/sites/${site.id}`}>
            打开工作台
            <ArrowRight />
          </Link>
        </Button>
      </div>
    </div>
  );
}

export default function SitesPage() {
  const sites = useSites();
  const accounts = useSiteAccounts();
  const bySite = new Map<string, SiteAccount[]>();
  for (const a of accounts.data?.items ?? []) bySite.set(a.siteId, [...(bySite.get(a.siteId) ?? []), a]);

  return (
    <>
      <PageHeader
        title="PT 站点工作台"
        actions={
          <Button variant="outline" size="sm" onClick={() => void sites.refetch()} disabled={sites.isFetching}>
            <RefreshCw className={sites.isFetching ? "animate-spin" : undefined} />
            刷新
          </Button>
        }
      />
      {sites.isPending ? (
        <div className="pg-slab rounded-xl p-4">
          <LoadingState rows={4} />
        </div>
      ) : sites.error && !sites.data ? (
        <ErrorState error={sites.error} onRetry={() => void sites.refetch()} />
      ) : !sites.data?.items.length ? (
        <EmptyState
          icon={Globe}
          title="还没有登记站点"
          description="在来源页或系统设置里登记站点和账号后,站点会列在这里。"
          action={
            <Button asChild variant="outline" size="sm">
              <Link to="/console/sources">去来源页</Link>
            </Button>
          }
        />
      ) : (
        <div className="grid gap-4 sm:grid-cols-2 xl:grid-cols-3">
          {sites.data.items.map((s) => (
            <SiteCard key={s.id} site={s} accounts={bySite.get(s.id) ?? []} />
          ))}
        </div>
      )}
    </>
  );
}