import { randomUUID } from "node:crypto";
import { mkdir, readdir, readFile, stat, writeFile } from "node:fs/promises";
import { join } from "node:path";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { executeRecord } from "../../src/modules/acquisition-organize/services/organize.ts";
import { createFmHarness, type FmHarness, key, pgAvailable, seedEntity } from "./harness.ts";

const skip = !(await pgAvailable());
describe.skipIf(skip)("file manager in-place import", () => {
  let h: FmHarness;
  beforeAll(async () => {
    h = await createFmHarness("in_place", {}, { runTransfers: false });
  });
  afterAll(async () => {
    await h?.close();
  });
  async function source(label: string, kind: "movie" | "series" = "movie") {
    const title = `${label}-${randomUUID().slice(0, 8)}`;
    const entity = await seedEntity(h.db, { title, kind, year: 2024 });
    await mkdir(join(h.lib, title), { recursive: true });
    const path = `${title}/${kind === "movie" ? "original.name.mkv" : "original.name.S03E04.mkv"}`;
    await writeFile(join(h.lib, path), "untouched video");
    return { entity, path, items: [{ root: h.libRoot, path, mediaEntityId: entity }] };
  }
  async function preview(items: unknown[], extra: Record<string, unknown> = {}) {
    const payload = { items, action: "in_place", minSizeBytes: 0, scrapeAfterImport: false, ...extra };
    const r = await h.api("POST", "/files/organize", { ...payload, idempotencyKey: key(), dryRun: true });
    expect(r.status).toBe(200);
    return { payload, data: r.body.data };
  }
  async function queue(items: unknown[], extra: Record<string, unknown> = {}) {
    const r = await preview(items, extra);
    expect(r.data.groups[0].error).toBeNull();
    const accepted = await h.api("POST", "/files/organize", {
      ...r.payload,
      idempotencyKey: key(),
      dryRun: false,
      planIds: r.data.groups.map((g: { planId: string }) => g.planId),
    });
    expect(accepted.status).toBe(200);
    expect(accepted.body.data.groups[0].error).toBeNull();
    return { ...r, recordId: accepted.body.data.recordIds[0] as string };
  }
  it("preserves movie and matched subtitle bytes, paths and mtimes; registers once and never transfers", async () => {
    const s = await source("Movie");
    const subtitle = s.path.replace(/\.mkv$/, ".chs.srt");
    await writeFile(join(h.lib, subtitle), "untouched subtitle");
    const before = await Promise.all([s.path, subtitle].map((p) => stat(join(h.lib, p))));
    const r = await queue([{ root: h.libRoot, path: s.path.split("/")[0]!, mediaEntityId: s.entity }], {
      naming: "template",
      onExisting: "replace_with_verify",
    });
    expect(r.data.groups[0].files).toHaveLength(2);
    expect(r.data.groups[0].files.every((f: { source: string; target: string }) => f.source === f.target)).toBe(true);
    expect((await executeRecord(h.module.deps().ao, r.recordId)).status).toBe("succeeded");
    expect((await executeRecord(h.module.deps().ao, r.recordId)).status).toBe("succeeded");
    expect(await readFile(join(h.lib, s.path), "utf8")).toBe("untouched video");
    expect(await readFile(join(h.lib, subtitle), "utf8")).toBe("untouched subtitle");
    const after = await Promise.all([s.path, subtitle].map((p) => stat(join(h.lib, p))));
    expect(after.map((f) => [f.size, f.mtimeMs, f.ino])).toEqual(before.map((f) => [f.size, f.mtimeMs, f.ino]));
    expect(await readdir(join(h.lib, s.path.split("/")[0]!))).toEqual(["original.name.chs.srt", "original.name.mkv"]);
    const assets = await h.db.selectFrom("media_asset").selectAll().where("media_entity_id", "=", s.entity).execute();
    expect(assets).toHaveLength(2);
    expect(assets.find((a) => a.kind === "subtitle")?.parent_asset_id).toBe(assets.find((a) => a.kind === "video")?.id);
    const ops = await h.db
      .selectFrom("asset_operation")
      .select(["kind", "phase"])
      .where("organization_record_id", "=", r.recordId)
      .orderBy("ordinal")
      .execute();
    expect(ops).toEqual([
      { kind: "register", phase: "verify" },
      { kind: "register", phase: "verify" },
    ]);
    expect(
      await h.db.selectFrom("path_binding").select("id").where("media_entity_id", "=", s.entity).execute(),
    ).toEqual([]);
    const again = await queue(s.items);
    await executeRecord(h.module.deps().ao, again.recordId);
    expect(
      await h.db.selectFrom("media_asset").select("id").where("media_entity_id", "=", s.entity).execute(),
    ).toHaveLength(2);
    // 文件管理装配不挂整理记录路由:直接查记录表
    const history = await h.db
      .selectFrom("organization_record")
      .select("action")
      .where("media_entity_id", "=", s.entity)
      .execute();
    expect(history.some((item) => item.action === "in_place")).toBe(true);
  });
  it("registers TV episodes in their existing directory and honors manual season/episode", async () => {
    const s = await source("TV", "series");
    const r = await queue(s.items.map((i) => ({ ...i, season: 2, episodes: [7] })));
    expect(r.data.groups[0].files[0].target).toBe(join(h.lib, s.path));
    expect((await executeRecord(h.module.deps().ao, r.recordId)).status).toBe("succeeded");
    const units = await h.db
      .selectFrom("content_unit")
      .select(["season_number", "episode_number"])
      .where("media_entity_id", "=", s.entity)
      .execute();
    expect(units.some((u) => u.season_number === 2 && u.episode_number === 7)).toBe(true);
  });
  it("scrapes only the newly registered file, retaining its organization association on resume", async () => {
    const s = await source("Scrape");
    await h.db
      .insertInto("external_identity")
      .values({
        media_entity_id: s.entity,
        provider: "tmdb",
        entity_type: "movie",
        external_id: "123456",
        status: "accepted",
      })
      .execute();
    await writeFile(join(h.lib, s.path.split("/")[0]!, "Unrelated.mkv"), "unrelated video");
    const r = await queue(s.items, { scrapeAfterImport: true });
    await executeRecord(h.module.deps().ao, r.recordId);
    await executeRecord(h.module.deps().ao, r.recordId);
    const scrapes = await h.db
      .selectFrom("scrape_record")
      .select(["path", "organization_record_id"])
      .where("organization_record_id", "=", r.recordId)
      .execute();
    expect(scrapes).toEqual([{ path: s.path, organization_record_id: r.recordId }]);
    expect(await readFile(join(h.lib, s.path.split("/")[0]!, "Unrelated.mkv"), "utf8")).toBe("unrelated video");
  });
  it("rejects an unregistered download directory without submitting a task", async () => {
    const entity = await seedEntity(h.db, { kind: "movie", title: "Outside", year: 2024 });
    await writeFile(join(h.dl, "outside.mkv"), "video");
    const r = await h.api("POST", "/files/organize", {
      items: [{ root: h.dlRoot, path: "outside.mkv", mediaEntityId: entity }],
      action: "in_place",
      minSizeBytes: 0,
      idempotencyKey: key(),
      dryRun: true,
    });
    expect(r.status).toBe(400);
    expect(await h.db.selectFrom("media_asset").select("id").where("media_entity_id", "=", entity).execute()).toEqual(
      [],
    );
  });
  it("does not bind a file to another work or import changed files after queue acceptance", async () => {
    const s = await source("Changed");
    const r = await queue(s.items);
    await writeFile(join(h.lib, s.path), "changed video longer");
    expect((await executeRecord(h.module.deps().ao, r.recordId)).status).toBe("failed");
    expect(await h.db.selectFrom("media_asset").select("id").where("media_entity_id", "=", s.entity).execute()).toEqual(
      [],
    );
    const original = await source("Owned");
    const a = await queue(original.items);
    await executeRecord(h.module.deps().ao, a.recordId);
    const other = await seedEntity(h.db, { kind: "movie", title: "Other", year: 2024 });
    const conflict = await preview([{ root: h.libRoot, path: original.path, mediaEntityId: other }]);
    expect(conflict.data.groups[0].error).not.toBeNull();
    expect(await h.db.selectFrom("media_asset").select("id").where("media_entity_id", "=", other).execute()).toEqual(
      [],
    );
  });
  it("registers read-only library roots without writing metadata", async () => {
    const s = await source("ReadOnly");
    const rootId = h.libRoot.slice(4);
    await h.db.updateTable("library_root").set({ management_mode: "register_only" }).where("id", "=", rootId).execute();
    try {
      const r = await queue(s.items, { scrapeAfterImport: true });
      expect((await executeRecord(h.module.deps().ao, r.recordId)).status).toBe("succeeded");
      expect(
        await h.db.selectFrom("scrape_record").select("id").where("organization_record_id", "=", r.recordId).execute(),
      ).toEqual([]);
      expect(await readdir(join(h.lib, s.path.split("/")[0]!))).toEqual(["original.name.mkv"]);
    } finally {
      await h.db.updateTable("library_root").set({ management_mode: "managed" }).where("id", "=", rootId).execute();
    }
  });
});