/**
 * Why is a shot not showing a render-derived thumbnail?
 *
 * Walks the chain in order and reports the first broken link:
 *
 *   ffmpeg on the worker → Export.thumbnailKey → project flag →
 *   Shot.generatedThumbnailUrl → what the UI resolves
 *
 * Usage:  node scripts/diagnose-thumbnails.mjs [PROJECT_CODE]
 */
import { PrismaClient } from "@prisma/client";

const db = new PrismaClient();
const projectCode = process.argv[2]?.toUpperCase();

const projects = await db.project.findMany({
  where: projectCode ? { code: projectCode } : {},
  select: { id: true, code: true, name: true, pipelineConfig: true },
  orderBy: { code: "asc" },
});

if (projects.length === 0) {
  console.log(projectCode ? `No project with code ${projectCode}.` : "No projects.");
  process.exit(0);
}

for (const p of projects) {
  const cfg = (p.pipelineConfig ?? {});
  const flag = cfg.autoShotThumbnail;
  const on = flag === true;

  console.log(`\n━━ ${p.code} — ${p.name}`);
  console.log(`   auto-promote flag : ${JSON.stringify(flag)} ${on ? "✔ on" : "✘ OFF"}`);
  if (flag === undefined) {
    console.log(`   ⚠ key absent from pipelineConfig. Either the setting was never saved,`);
    console.log(`     or the server that saved it predates the boolean fix in actions/projects.ts.`);
    console.log(`     Stored keys: ${JSON.stringify(Object.keys(cfg))}`);
  }

  const exports = await db.export.findMany({
    where: { shot: { projectId: p.id } },
    orderBy: { createdAt: "desc" },
    take: 10,
    select: {
      versionString: true, status: true, createdAt: true,
      thumbnailKey: true, skipPreview: true,
      shot: {
        select: {
          shotCode: true, thumbnailUrl: true,
          generatedThumbnailUrl: true, generatedThumbnailFrom: true,
        },
      },
    },
  });

  if (exports.length === 0) {
    console.log("   (no exports yet)");
    continue;
  }

  console.log(`   last ${exports.length} exports:`);
  for (const e of exports) {
    const s = e.shot;
    const displayed = s.thumbnailUrl || s.generatedThumbnailUrl || null;
    const source = s.thumbnailUrl ? "reference" : s.generatedThumbnailUrl ? "render" : "NOTHING";
    console.log(
      `\n     ${s.shotCode} ${e.versionString} [${e.status}]${e.skipPreview ? " skipPreview" : ""}`
    );
    console.log(`       export.thumbnailKey     : ${e.thumbnailKey ?? "✘ NULL — worker produced no thumbnail (ffmpeg?)"}`);
    console.log(`       shot.thumbnailUrl       : ${s.thumbnailUrl ?? "(none)"}`);
    console.log(`       shot.generatedThumbnail : ${s.generatedThumbnailUrl ?? "(none)"}${s.generatedThumbnailFrom ? ` [from ${s.generatedThumbnailFrom}]` : ""}`);
    console.log(`       → UI shows              : ${displayed ?? "nothing"}  (${source})`);

    if (!e.thumbnailKey) {
      console.log(`       ⇒ Broken at the WORKER. Check ffmpegPath in config.json on the`);
      console.log(`         machine that ran it, and its log for "no thumbnail".`);
    } else if (!on) {
      console.log(`       ⇒ Thumbnail exists but the project flag is off, so it was not promoted.`);
      console.log(`         Turn on "Use render frames as shot thumbnails", or use the`);
      console.log(`         per-export "Use frame" button on the shot's Exports tab.`);
    } else if (!s.generatedThumbnailUrl) {
      console.log(`       ⇒ Thumbnail exists and the flag is on, but nothing was promoted.`);
      console.log(`         This export probably finalized BEFORE the flag was turned on —`);
      console.log(`         promotion happens at finalize, it is not retroactive. Re-render,`);
      console.log(`         or press "Use frame" on the Exports tab.`);
    }
  }
}

await db.$disconnect();