import { prisma } from "@/lib/db";

export async function POST(request: Request) {
  let body: unknown;
  try {
    body = await request.json();
  } catch {
    return Response.json({ error: "invalid JSON" }, { status: 400 });
  }

  const { artist, album } = (body ?? {}) as { artist?: unknown; album?: unknown };
  if (typeof artist !== "string" || !artist.trim() || typeof album !== "string" || !album.trim()) {
    return Response.json({ error: "artist and album are required" }, { status: 400 });
  }

  const created = await prisma.request.create({
    data: {
      artist: artist.trim(),
      album: album.trim(),
      job: { create: {} },
    },
    include: { job: true },
  });

  return Response.json(
    {
      id: created.id,
      artist: created.artist,
      album: created.album,
      status: created.status,
      job: { id: created.job!.id, state: created.job!.state, currentStage: created.job!.currentStage },
    },
    { status: 201 },
  );
}

export async function GET() {
  const [requests, releases] = await Promise.all([
    prisma.request.findMany({
      orderBy: { createdAt: "desc" },
      include: { job: { include: { candidates: { select: { source: true, format: true, trackCount: true, chosen: true } } } } },
    }),
    prisma.monitoredRelease.findMany({ select: { artistName: true, album: true, rgMbid: true } }),
  ]);
  const rgByKey = new Map(releases.map((mr) => [`${mr.artistName} ${mr.album}`, mr.rgMbid]));

  return Response.json({
    requests: requests.map((r) => ({
      id: r.id,
      artist: r.artist,
      album: r.album,
      status: r.status,
      createdAt: r.createdAt,
      rgMbid: rgByKey.get(`${r.artist} ${r.album}`) ?? null,
      job: r.job
        ? (() => {
            const cands = r.job.candidates;
            const chosen = cands.find((c) => c.chosen) ?? null;
            return {
              state: r.job.state,
              currentStage: r.job.currentStage,
              attempts: r.job.attempts,
              error: r.job.error,
              claimedAt: r.job.claimedAt,
              updatedAt: r.job.updatedAt,
              downloadProgress: r.job.downloadProgress,
              paused: r.job.paused,
              candidateCount: cands.length,
              chosen: chosen ? { source: chosen.source, format: chosen.format, trackCount: chosen.trackCount } : null,
            };
          })()
        : null,
    })),
  });
}