import { notFound } from "next/navigation";
import type { Metadata } from "next";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { SessionTimelineChart } from "@/components/sessions/SessionTimelineChart";
import { getPlaySessionDetail, getPlaySessionName } from "@/lib/db/queries/play-sessions";
import { getSessionTimeline } from "@/lib/db/queries/stats";

export const dynamic = "force-dynamic";

export async function generateMetadata({ params }: { params: Promise<{ id: string }> }): Promise<Metadata> {
  const { id } = await params;
  const name = await getPlaySessionName(Number(id));
  return { title: name ?? `Session #${id}` };
}

function formatDuration(ms: number | null): string {
  if (ms === null) return "-";
  const totalSeconds = Math.round(ms / 1000);
  return `${Math.floor(totalSeconds / 60)}:${(totalSeconds % 60).toString().padStart(2, "0")}`;
}

export default async function SessionDetailPage({ params }: { params: Promise<{ id: string }> }) {
  const { id } = await params;
  const sessionId = Number(id);
  const [detail, timeline] = await Promise.all([getPlaySessionDetail(sessionId), getSessionTimeline(sessionId)]);
  if (!detail) notFound();

  return (
    <div className="flex flex-col gap-6">
      <div>
        <h1 className="font-heading text-2xl font-semibold">{detail.session.name ?? `Session #${detail.session.id}`}</h1>
        <p className="text-sm text-muted-foreground">
          {detail.session.kind} · {detail.session.status} · {formatDuration(detail.session.durationMs)}
        </p>
      </div>

      <Card className="bp-glass">
        <CardHeader>
          <CardTitle className="text-base">Intensity timeline</CardTitle>
        </CardHeader>
        <CardContent>
          <SessionTimelineChart timeline={timeline} />
        </CardContent>
      </Card>

      <Card className="bp-glass">
        <CardHeader>
          <CardTitle className="text-base">Devices</CardTitle>
        </CardHeader>
        <CardContent className="flex flex-col gap-1">
          {detail.devices.map((d) => (
            <div key={d.id} className="text-sm">
              {d.slotLabel} <span className="text-muted-foreground">({d.deviceDisplayName ?? d.deviceBleName})</span>
            </div>
          ))}
        </CardContent>
      </Card>
    </div>
  );
}