import { mkdir, readdir, stat, writeFile } from "node:fs/promises";
import path from "node:path";
import type { MediaRenderer, MotionGraphicsRenderer } from "@rakazo/adapter-kit";
import { UnsupportedMediaOperationError } from "@rakazo/adapter-kit";
import type { FfprobeReport, GateIssue, MediaRender, RenderPlan } from "@rakazo/contracts";
import { findMetadataLeaks } from "@rakazo/media";
import { afterEach, describe, expect, it } from "vitest";
import type { MediaPrivacyService } from "./media-context.js";
import { FfmpegMediaRenderer } from "./media-ffmpeg-renderer.js";
import type { FakePrivacy, RenderHarness } from "./media-render.fixtures.js";
import {
  createFakePrivacy,
  createRenderHarness,
  hasMediaTools,
  renderTestProfile,
  writeSyntheticClip,
} from "./media-render.fixtures.js";
import { createMediaRenderHandler, createMediaRenderService, pickEncoder } from "./media-render.js";

const profile = renderTestProfile();

const motion: MotionGraphicsRenderer = {
  id: "unused",
  templates: () => [],
  render: async () => {
    throw new Error("no motion in these plans");
  },
};

interface FakeRenderer extends MediaRenderer {
  plans: RenderPlan[];
}

/**
 * Executes write_file steps and writes placeholder outputs; probes report a
 * clean, on-target file. `failEncoders` makes renders with those encoders fail.
 */
function fakeRenderer(
  options: {
    hardware?: string[];
    failEncoders?: string[];
    tags?: Record<string, string>;
    posterTags?: Record<string, string>;
    /** Resolves once a render started; the render then waits for its signal. */
    hold?: { started: () => void };
  } = {},
): FakeRenderer {
  const plans: RenderPlan[] = [];
  let durationMs = 0;
  return {
    id: "fake",
    plans,
    hardwareEncoders: async () => options.hardware ?? [],
    async render(plan, { signal, onProgress } = {}) {
      plans.push(plan);
      const step = plan.steps.find((s) => s.kind === "ffmpeg" && s.id === "render");
      if (step?.kind !== "ffmpeg") throw new Error("no render step");
      durationMs = step.durationMs;
      const encoder = step.argv[step.argv.indexOf("-c:v") + 1]!;
      if (options.failEncoders?.includes(encoder)) throw new Error(`${encoder}: device lost`);
      if (options.hold) {
        options.hold.started();
        await new Promise<void>((_, reject) => {
          signal?.addEventListener("abort", () => {
            const error = new Error("render aborted");
            error.name = "AbortError";
            reject(error);
          });
        });
      }
      for (const s of plan.steps) {
        if (s.kind === "write_file") {
          await mkdir(path.dirname(s.path), { recursive: true });
          await writeFile(s.path, s.content);
        }
        if (s.kind === "ffmpeg") {
          for (const file of s.produces) await writeFile(file, `rendered ${s.id}`);
        }
      }
      onProgress?.({ stepId: "render", progress: 1 });
    },
    async probe(file): Promise<FfprobeReport> {
      const poster = file.endsWith(".jpg");
      return {
        durationMs: poster ? 0 : durationMs,
        width: profile.video.width,
        height: profile.video.height,
        fps: poster ? 0 : profile.video.fps,
        videoCodec: poster ? "mjpeg" : "h264",
        audioCodec: poster ? null : "aac",
        sizeBytes: (await stat(file)).size,
        integratedLufs: poster ? null : -14.2,
        truePeakDb: poster ? null : -1.5,
        tags: poster ? (options.posterTags ?? {}) : (options.tags ?? {}),
      };
    },
    extractFrame: async () => {
      throw new Error("not used");
    },
  };
}

function edlFor(assetId: string) {
  return {
    edlVersion: 1,
    output: {
      profileId: profile.id,
      width: profile.video.width,
      height: profile.video.height,
      fps: 30,
      durationTargetMs: 3000,
      durationHardMinMs: 1000,
      durationHardMaxMs: 120_000,
    },
    tracks: {
      video: [
        { id: "c1", assetId, inMs: 0, outMs: 1500, atMs: 0, reframe: "auto" },
        { id: "c2", assetId, inMs: 2000, outMs: 3500, atMs: 1500, reframe: "auto" },
      ],
    },
    captions: { mode: "both" },
    overlays: [{ id: "t1", kind: "text", atMs: 200, durationMs: 1000, text: "Example" }],
    metadata: { title: "Example teaser" },
  };
}

interface Setup {
  harness: RenderHarness;
  privacy: FakePrivacy;
  renderer: MediaRenderer;
  run: (planQuality?: "draft" | "final") => Promise<MediaRender>;
  renderDir: (renderId: string) => string;
}

let cleanups: Array<() => Promise<void>> = [];
afterEach(async () => {
  for (const cleanup of cleanups) await cleanup();
  cleanups = [];
});

async function setup(options: {
  renderer: MediaRenderer;
  privacy?: (sources: RenderHarness["sources"]) => MediaPrivacyService;
  failWith?: GateIssue;
  realSource?: boolean;
}): Promise<Setup & { service: ReturnType<typeof createMediaRenderService> }> {
  const harness = await createRenderHarness({
    profiles: [profile],
    renderer: options.renderer,
    motion,
  });
  cleanups.push(() => harness.cleanup());
  const assetId = await harness.createAsset("source.mp4");
  const file = harness.assetPath(assetId, "source.mp4");
  if (options.realSource) {
    await writeSyntheticClip(file, { seconds: 4, width: 320, height: 180, volumeDb: -30 });
  } else {
    await mkdir(path.dirname(file), { recursive: true });
    await writeFile(file, "synthetic");
  }
  harness.setSource(assetId, {
    path: file,
    width: 320,
    height: 180,
    durationMs: 4000,
    fps: 30,
    hasAudio: true,
    rotation: 0,
  });
  await harness.addAnalysis(assetId, "transcript", {
    language: "en",
    words: [
      { startMs: 100, endMs: 500, text: "Hello", confidence: 0.9 },
      { startMs: 2100, endMs: 2600, text: "again.", confidence: 0.9 },
    ],
  });
  await harness.addSegments(assetId, [
    { startMs: 0, endMs: 2000 },
    { startMs: 2000, endMs: 4000 },
  ]);
  const projectId = await harness.createProject({
    assetIds: [assetId],
    kit: null,
    profileId: profile.id,
  });
  const plan = await harness.createPlan(projectId, edlFor(assetId));
  const privacy = createFakePrivacy(harness.sources, { failWith: options.failWith });
  const service = createMediaRenderService(harness.deps);
  const handler = createMediaRenderHandler(
    harness.deps,
    options.privacy ? options.privacy(harness.sources) : privacy,
    { cancelPollMs: 50 },
  );
  const actor = { spaceId: harness.spaceId, userId: harness.userId };
  return {
    harness,
    privacy,
    renderer: options.renderer,
    service,
    renderDir: (renderId) => path.join(harness.mediaRoot, harness.spaceId, "renders", renderId),
    async run(quality = "draft") {
      const render = await service.start(actor, { planId: plan.id, quality });
      await handler({ renderId: render.id });
      return harness.deps.repos.getRender(harness.spaceId, render.id);
    },
  };
}

async function exists(file: string): Promise<boolean> {
  return stat(file).then(
    () => true,
    () => false,
  );
}

describe("media render service", () => {
  it("queues a render job and announces it", async () => {
    const { harness, service } = await setup({ renderer: fakeRenderer() });
    expect(harness.backend).toBe(
      process.env.VERIFY_DATABASE && process.env.DATABASE_URL ? "postgres" : "memory",
    );
    const projectId = await harness.createProject({
      assetIds: [],
      kit: null,
      profileId: profile.id,
    });
    const assetId = [...harness.sources.keys()][0]!;
    const plan = await harness.createPlan(projectId, edlFor(assetId));
    const actor = { spaceId: harness.spaceId, userId: harness.userId };
    const render = await service.start(actor, { planId: plan.id, quality: "final" });
    expect(render).toMatchObject({ status: "queued", quality: "final", planId: plan.id });
    expect(harness.enqueued).toContain(`media.render:${JSON.stringify({ renderId: render.id })}`);
    expect(harness.events).toContainEqual({
      type: "media.render",
      renderId: render.id,
      projectId,
      status: "queued",
      progress: 0,
    });
    await expect(
      service.start({ ...actor, spaceId: "space-other" }, { planId: plan.id, quality: "draft" }),
    ).rejects.toThrow();
  });

  it("renders, gates, stores outputs and serves only recorded files", async () => {
    const renderer = fakeRenderer();
    const { harness, service, run, renderDir } = await setup({ renderer });
    const render = await run();
    expect(render.status).toBe("done");
    expect(render.progress).toBe(1);
    expect(render.gateReport?.passed).toBe(true);
    expect(render.ffprobe?.integratedLufs).toBe(-14.2);
    expect(render.outputs.map((output) => output.fileName).sort()).toEqual([
      "captions.srt",
      "captions.vtt",
      "poster.jpg",
      "video.mp4",
    ]);
    const video = render.outputs.find((output) => output.kind === "video")!;
    expect(video.artifactId).toBeNull();
    expect(render.outputs.filter((output) => output.artifactId !== null)).toHaveLength(3);
    expect(await harness.artifactCount()).toBe(3);
    // Intermediates are gone; only the published outputs stay.
    expect((await readdir(renderDir(render.id))).sort()).toEqual([
      "captions.srt",
      "captions.vtt",
      "poster.jpg",
      "video.mp4",
    ]);
    const actor = { spaceId: harness.spaceId, userId: harness.userId };
    expect(await service.outputPath(actor, render.id, "video.mp4")).toBe(
      path.join(renderDir(render.id), "video.mp4"),
    );
    expect(await service.outputPath(actor, render.id, "../video.mp4")).toBeNull();
    expect(await service.outputPath(actor, render.id, "work")).toBeNull();
    await expect(
      service.outputPath({ ...actor, spaceId: "space-other" }, render.id, "video.mp4"),
    ).rejects.toThrow();
    const statuses = harness.events.flatMap((event) =>
      event.type === "media.render" && event.renderId === render.id ? [event.status] : [],
    );
    expect(statuses[0]).toBe("queued");
    expect(statuses).toContain("gating");
    expect(statuses.at(-1)).toBe("done");
  });

  it("refuses to render when redactions cannot be applied (fail closed)", async () => {
    const renderer = fakeRenderer();
    let calls = 0;
    const { harness, run, renderDir } = await setup({
      renderer,
      privacy: (sources) => ({
        ...createFakePrivacy(sources),
        async prepareSources() {
          calls += 1;
          throw new Error("face track lost for 800 ms");
        },
      }),
    });
    const render = await run("final");
    expect(calls).toBe(1);
    expect(render.status).toBe("failed");
    expect(render.error).toBe("Anonymization could not be applied. Nothing was rendered.");
    expect(render.outputs).toEqual([]);
    expect(renderer.plans).toHaveLength(0);
    expect(await exists(renderDir(render.id))).toBe(false);
    expect(await harness.artifactCount()).toBe(0);
  });

  it("names the missing capability and refuses when a clip was not prepared", async () => {
    const unsupported = await setup({
      renderer: fakeRenderer(),
      privacy: (sources) => ({
        ...createFakePrivacy(sources),
        async prepareSources() {
          throw new UnsupportedMediaOperationError("inpaintVideo", "no model");
        },
      }),
    });
    expect((await unsupported.run()).error).toBe(
      "Anonymization needs inpaintVideo, which is not available. Nothing was rendered.",
    );

    const renderer = fakeRenderer();
    const partial = await setup({
      renderer,
      privacy: (sources) => ({
        ...createFakePrivacy(sources),
        async prepareSources() {
          return { sources: new Map(), aiAlterations: [], fallbacks: [] };
        },
      }),
    });
    const render = await partial.run();
    expect(render.status).toBe("failed");
    expect(render.error).toBe("Anonymization did not prepare every clip. Nothing was rendered.");
    expect(renderer.plans).toHaveLength(0);
  });

  it("falls back to software when a hardware encoder fails and skips it afterwards", async () => {
    const renderer = fakeRenderer({
      hardware: ["hevc_vaapi", "h264_vaapi"],
      failEncoders: ["h264_vaapi"],
    });
    const { run } = await setup({ renderer });
    const encoders = () =>
      renderer.plans.map((plan) => {
        const step = plan.steps.find((s) => s.kind === "ffmpeg" && s.id === "render");
        return step?.kind === "ffmpeg" ? step.argv[step.argv.indexOf("-c:v") + 1] : null;
      });
    expect((await run("final")).status).toBe("done");
    expect(encoders()).toEqual(["h264_vaapi", "libx264"]);
    expect((await run("final")).status).toBe("done");
    expect(encoders()).toEqual(["h264_vaapi", "libx264", "libx264"]);
  });

  it("uses software for drafts and a working hardware encoder for finals", async () => {
    const renderer = fakeRenderer({ hardware: ["hevc_nvenc", "h264_nvenc"] });
    expect(await pickEncoder(renderer, profile, "draft")).toBe("libx264");
    expect(await pickEncoder(renderer, profile, "final")).toBe("h264_nvenc");
    expect(await pickEncoder(fakeRenderer(), profile, "final")).toBe("libx264");
    const hevc = renderTestProfile({
      video: { ...profile.video, codec: "hevc" },
    });
    expect(await pickEncoder(renderer, hevc, "final")).toBe("hevc_nvenc");
    expect(await pickEncoder(renderer, hevc, "draft")).toBe("libx265");
  });

  it("fails a render whose video or poster still carries source metadata", async () => {
    const leaky = await setup({
      renderer: fakeRenderer({ tags: { "format.location": "+00+000/" } }),
    });
    const render = await leaky.run();
    expect(render.status).toBe("failed");
    expect(render.error).toBe("The export still carried source metadata.");
    expect(await exists(leaky.renderDir(render.id))).toBe(false);

    const poster = await setup({
      renderer: fakeRenderer({ posterTags: { "format.make": "ExampleCam" } }),
    });
    expect((await poster.run()).error).toBe("The poster still carried source metadata.");
  });

  it("auto-fixes a blocked gate at most three times, then blocks", async () => {
    const renderer = fakeRenderer();
    const { harness, privacy, run, renderDir } = await setup({
      renderer,
      failWith: {
        check: "content",
        severity: "block",
        code: "classifier_violence",
        message: "violence score above the profile threshold",
        atMs: 0,
        endMs: 400,
      },
    });
    const render = await run();
    expect(render.status).toBe("blocked");
    expect(render.gateReport?.passed).toBe(false);
    expect(privacy.gateCalls.map((call) => call.autoFixRound)).toEqual([0, 1, 2, 3]);
    expect(renderer.plans).toHaveLength(4);
    const record = await harness.deps.repos.getRenderRecord(harness.spaceId, render.id);
    expect(record.autoFixRound).toBe(3);
    const versions = await harness.planVersions(render.projectId, profile.id);
    expect(versions).toHaveLength(4);
    expect(versions[0]!.createdBy).toBe("agent");
    expect(versions[0]!.rationale).toContain("Auto-fix 3/3");
    expect(render.outputs).toEqual([]);
    expect(await exists(renderDir(render.id))).toBe(false);
    expect(await harness.artifactCount()).toBe(0);
  });

  it("cancels a running render, stops it and removes its files", async () => {
    let started!: () => void;
    const running = new Promise<void>((resolve) => {
      started = resolve;
    });
    const renderer = fakeRenderer({ hold: { started: () => started() } });
    const { harness, service, run, renderDir } = await setup({ renderer });
    const result = run();
    await running;
    const active = harness.events.findLast((event) => event.type === "media.render");
    const renderId = active?.type === "media.render" ? active.renderId : "";
    const canceled = await service.cancel(
      { spaceId: harness.spaceId, userId: harness.userId },
      renderId,
    );
    expect(canceled.status).toBe("canceled");
    const render = await result;
    expect(render.status).toBe("canceled");
    expect(await exists(renderDir(renderId))).toBe(false);
    await expect(
      service.cancel({ spaceId: harness.spaceId, userId: harness.userId }, renderId),
    ).rejects.toThrow();
  });
});

describe.skipIf(!hasMediaTools)("media render job with real ffmpeg", () => {
  it("renders a synthetic project end to end and records a clean probe", async () => {
    const renderer = new FfmpegMediaRenderer();
    const { run, renderDir } = await setup({ renderer, realSource: true });
    const render = await run("draft");
    expect(render.error).toBeNull();
    expect(render.status).toBe("done");
    const probe = render.ffprobe!;
    expect(probe.width).toBe(profile.video.width);
    expect(probe.height).toBe(profile.video.height);
    expect(Math.abs(probe.durationMs - 3000)).toBeLessThanOrEqual(1000 / 30 + 1);
    expect(Math.abs(probe.integratedLufs! - profile.audio.targetLufs)).toBeLessThanOrEqual(1);
    expect(findMetadataLeaks(probe.tags)).toEqual([]);
    const video = path.join(renderDir(render.id), "video.mp4");
    const reprobed = await renderer.probe(video);
    expect(reprobed.tags["format.title"]).toBe("Example teaser");
    expect(Object.values(reprobed.tags).join(" ")).not.toContain("ExampleCam");
  }, 120_000);
});