import { mkdir, writeFile } from "node:fs/promises";
import { join } from "node:path";
import { createTmdbClient } from "@umt/adapters";
import { createMockTmdb, type MockTmdb, SPLIT_COUR_FIXTURE, TMDB_FIXTURES } from "@umt/testkit";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import type { FrozenPlan } from "../../src/modules/acquisition-organize/services/organize.ts";
import { executeRecord } from "../../src/modules/acquisition-organize/services/organize.ts";
import { refreshMetadata } from "../../src/modules/sources-identity/service/metadata.ts";
import { setWordsText } from "../support/identify-words.ts";
import { createFmHarness, EXEC_KEY, type FmHarness, key, pgAvailable, seedDownload, seedEntity } from "./harness.ts";

// 整理时指定季集结构(docs/runbook/organize.md「整理时指定剧集组」):作品是 TMDB 默认季(S1 = 25 集),
// 剧集组「制作季」拆成 S1(1–12)、S2(13–25)。临时按组整理 S01E14 → 命名 S02E02,资产覆盖仍挂作品的 S01E14 单元;
// 勾「同时设为作品的季集结构」→ 先切换作品(单元原地迁移),再按新结构整理;缺省跟随作品时行为不变。

const skip = !(await pgAvailable());

describe.skipIf(skip)("整理时指定季集结构", () => {
  let h: FmHarness;
  let tmdb: MockTmdb;
  let show: string;
  let unitE14: string;

  beforeAll(async () => {
    tmdb = await createMockTmdb({ fixtures: [...TMDB_FIXTURES, SPLIT_COUR_FIXTURE] });
    h = await createFmHarness("organize_episode_structure", {
      tmdb: () => createTmdbClient({ apiKey: "test-tmdb-key", baseUrl: `${tmdb.url}/3`, retries: 0 }),
    });
    show = await seedEntity(h.db, { kind: "series", title: "Split Cour", year: 2024 });
    await h.db
      .insertInto("external_identity")
      .values({
        media_entity_id: show,
        provider: "tmdb",
        entity_type: "tv",
        external_id: String(SPLIT_COUR_FIXTURE.id),
        status: "accepted",
      })
      .execute();
    expect((await refreshMetadata(h.module.deps().sources(), show, { full: true })).status).toBe("refreshed");
    unitE14 = await unitAt(1, 14);
    for (const name of [
      "Split Cour S01E13 [1080p].mkv",
      "Split Cour S01E14 [1080p].mkv",
      "Split Cour S01E14 [2160p].mkv",
    ])
      await writeFile(join(h.dl, name), name.padEnd(64, "x"));
    await mkdir(join(h.lib, "alt"), { recursive: true });
  });
  afterAll(async () => {
    await h?.close();
    await tmdb?.close();
  });

  async function unitAt(season: number, episode: number): Promise<string> {
    return (
      await h.db
        .selectFrom("content_unit")
        .select("id")
        .where("media_entity_id", "=", show)
        .where("kind", "=", "episode")
        .where("season_number", "=", season)
        .where("episode_number", "=", episode)
        .where("status", "<>", "retired")
        .executeTakeFirstOrThrow()
    ).id;
  }
  const entityGroup = async () =>
    (await h.db.selectFrom("media_entity").select("episode_group_id").where("id", "=", show).executeTakeFirstOrThrow())
      .episode_group_id;
  const coverage = async (recordId: string) =>
    h.db
      .selectFrom("organization_file_result as f")
      .innerJoin("asset_unit_coverage as c", "c.media_asset_id", "f.media_asset_id")
      .innerJoin("content_unit as u", "u.id", "c.content_unit_id")
      .select(["u.id", "u.season_number", "u.episode_number"])
      .where("f.organization_record_id", "=", recordId)
      .execute();
  const frozen = async (recordId: string) =>
    (await h.db.selectFrom("organization_record").select("plan").where("id", "=", recordId).executeTakeFirstOrThrow())
      .plan as unknown as FrozenPlan;

  async function organize(path: string, extra: Record<string, unknown> = {}, targetDir?: string) {
    const body = {
      action: "copy",
      items: [
        {
          root: h.dlRoot,
          path,
          mediaEntityId: show,
          ...(targetDir ? { targetDir: { root: h.libRoot, path: targetDir } } : {}),
        },
      ],
      ...extra,
    };
    const dry = await h.api("POST", "/files/organize", { ...body, idempotencyKey: key(), dryRun: true });
    expect(dry.status, JSON.stringify(dry.body)).toBe(200);
    const preview = dry.body.data.groups[0];
    expect(preview.error, JSON.stringify(preview)).toBeNull();
    const groupAfterPreview = await entityGroup();
    const exec = await h.api("POST", "/files/organize", {
      ...body,
      idempotencyKey: key(),
      dryRun: false,
      planIds: [preview.planId],
    });
    expect(exec.status, JSON.stringify(exec.body)).toBe(200);
    expect(exec.body.data.groups[0].error, JSON.stringify(exec.body.data.groups[0])).toBeNull();
    const recordId = exec.body.data.recordIds[0] as string;
    expect((await executeRecord(h.module.deps().ao, recordId)).status).toBe("succeeded");
    return { preview, groupAfterPreview, exec: exec.body.data.groups[0], recordId };
  }

  it("缺省跟随作品:按作品默认季命名与登记,计划里不记季集结构(回归)", async () => {
    const r = await organize("Split Cour S01E13 [1080p].mkv");
    expect(r.preview.files[0].target).toMatch(/Season 1\/.*S01E13/);
    expect(r.preview.episodeStructure).toBeUndefined();
    expect(await coverage(r.recordId)).toEqual([expect.objectContaining({ season_number: 1, episode_number: 13 })]);
    expect((await frozen(r.recordId)).episodeStructure).toBeUndefined();
  });

  it("指定与作品相同的结构等同跟随作品", async () => {
    const dry = await h.api("POST", "/files/organize", {
      idempotencyKey: key(),
      action: "copy",
      dryRun: true,
      items: [{ root: h.dlRoot, path: "Split Cour S01E14 [1080p].mkv", mediaEntityId: show }],
      episodeStructures: [{ mediaEntityId: show, groupId: null }],
    });
    expect(dry.status).toBe(200);
    const g = dry.body.data.groups[0];
    expect(g.files[0].target).toMatch(/Season 1\/.*S01E14/);
    expect(g.episodeStructure).toEqual({ groupId: null, name: "TMDB 默认季", temporary: false });
  });

  it("临时按剧集组整理:S01E14 命名为 S02E02,作品设置不变,资产覆盖挂作品的 S01E14 单元", async () => {
    const r = await organize("Split Cour S01E14 [1080p].mkv", {
      episodeStructures: [{ mediaEntityId: show, groupId: "grp-production" }],
    });
    expect(r.preview.files[0].target).toMatch(/Season 2\/.*S02E02/);
    expect(r.preview.episodeStructure).toEqual({ groupId: "grp-production", name: "制作季", temporary: true });
    expect(await entityGroup()).toBeNull();
    expect(await coverage(r.recordId)).toEqual([{ id: unitE14, season_number: 1, episode_number: 14 }]);
    const plan = await frozen(r.recordId);
    expect(plan.episodeStructure).toEqual({
      groupId: "grp-production",
      name: "制作季",
      entityGroupId: null,
      temporary: true,
    });
    const fx = Object.values(plan.facts)[0]!;
    expect(fx).toMatchObject({
      season: 1,
      episodes: { start: 14, end: 14 },
      structureEpisodes: { season: 2, episodes: { start: 2, end: 2 } },
    });
    expect(fx.episodeResolution?.evidence).toContain("structure:grp-production");
  });

  it("勾「同时设为作品的季集结构」但 Move 授权不通过:不执行,作品结构不变", async () => {
    const body = {
      action: "move",
      items: [
        {
          root: h.dlRoot,
          path: "Split Cour S01E14 [2160p].mkv",
          mediaEntityId: show,
          targetDir: { root: h.libRoot, path: "alt" },
        },
      ],
      episodeStructures: [{ mediaEntityId: show, groupId: "grp-production", applyToEntity: true }],
    };
    const dry = await h.api("POST", "/files/organize", { ...body, idempotencyKey: key(), dryRun: true }, EXEC_KEY);
    expect(dry.status, JSON.stringify(dry.body)).toBe(200);
    expect(dry.body.data.groups[0].error).toBeNull();
    const exec = await h.api(
      "POST",
      "/files/organize",
      { ...body, idempotencyKey: key(), dryRun: false, planIds: [dry.body.data.groups[0].planId] },
      EXEC_KEY,
    );
    expect(exec.status).toBe(403);
    expect(exec.body.error.message).toMatch(/^approval_required:/);
    expect(await entityGroup()).toBeNull();
    expect(await unitAt(1, 14)).toBe(unitE14);
  });

  it("勾「同时设为作品的季集结构」但做种义务未满足、不能移动:该组不执行,作品结构不变", async () => {
    const name = "Split Cour S01E14 [2160p].mkv";
    const task = await seedDownload(h.db, h, { name, status: "completed" });
    const body = {
      action: "move",
      items: [{ root: h.dlRoot, path: name, mediaEntityId: show, targetDir: { root: h.libRoot, path: "alt" } }],
      episodeStructures: [{ mediaEntityId: show, groupId: "grp-production", applyToEntity: true }],
    };
    const dry = await h.api("POST", "/files/organize", { ...body, idempotencyKey: key(), dryRun: true });
    expect(dry.status, JSON.stringify(dry.body)).toBe(200);
    expect(dry.body.data.groups[0].error).toBeNull();
    const exec = await h.api("POST", "/files/organize", {
      ...body,
      idempotencyKey: key(),
      dryRun: false,
      planIds: [dry.body.data.groups[0].planId],
    });
    expect(exec.status).toBe(200);
    expect(exec.body.data.groups[0].error?.code).toBe("download_active");
    expect(exec.body.data.recordIds).toEqual([]);
    expect(await entityGroup()).toBeNull();
    expect(await unitAt(1, 14)).toBe(unitE14);
    await h.db.deleteFrom("download_task").where("id", "=", task).execute();
  });

  it("勾「同时设为作品的季集结构」:预览不切换,执行时先切换作品、单元原地迁移,命名 S02E02,覆盖挂迁移后的单元", async () => {
    const r = await organize(
      "Split Cour S01E14 [2160p].mkv",
      { episodeStructures: [{ mediaEntityId: show, groupId: "grp-production", applyToEntity: true }] },
      "alt",
    );
    expect(r.groupAfterPreview).toBeNull();
    expect(r.preview.episodeStructure).toEqual({
      groupId: "grp-production",
      name: "制作季",
      temporary: true,
      appliedToEntity: true,
    });
    expect(r.preview.files[0].target).toMatch(/alt\/.*S02E02/);
    expect(r.exec.files[0].target).toMatch(/alt\/.*S02E02/);
    expect(await entityGroup()).toBe("grp-production");
    // 单元 id 不变,原地迁到组的 S2E2
    expect(await unitAt(2, 2)).toBe(unitE14);
    expect(await coverage(r.recordId)).toEqual([{ id: unitE14, season_number: 2, episode_number: 2 }]);
    expect((await frozen(r.recordId)).episodeStructure).toEqual({
      groupId: "grp-production",
      name: "制作季",
      entityGroupId: "grp-production",
      temporary: false,
      appliedToEntity: true,
    });
  });

  it("作品是剧集组时临时按默认季:S01E13 命名 S01E13,覆盖换回组的 S02E01 单元", async () => {
    const dry = await h.api("POST", "/files/organize", {
      idempotencyKey: key(),
      action: "copy",
      dryRun: true,
      items: [
        {
          root: h.dlRoot,
          path: "Split Cour S01E13 [1080p].mkv",
          mediaEntityId: show,
          targetDir: { root: h.libRoot, path: "alt" },
        },
      ],
      episodeStructures: [{ mediaEntityId: show, groupId: null }],
    });
    expect(dry.status, JSON.stringify(dry.body)).toBe(200);
    const g = dry.body.data.groups[0];
    expect(g.files[0].target).toMatch(/alt\/.*S01E13/);
    expect(g.episodeStructure).toEqual({ groupId: null, name: "TMDB 默认季", temporary: true });
    const art = await h.db
      .selectFrom("artifact")
      .select("content")
      .where("id", "=", g.planId)
      .executeTakeFirstOrThrow();
    const plan = (art.content as { plan: FrozenPlan }).plan;
    expect(Object.values(plan.facts)[0]).toMatchObject({
      season: 2,
      episodes: { start: 1, end: 1 },
      structureEpisodes: { season: 1, episodes: { start: 13, end: 13 } },
    });
  });

  it("作品的映射规则按作品结构写:临时结构下规则结果经 TMDB 原季集换到指定结构", async () => {
    // 作品现在是「制作季」:ABS 组按 EP-24 换到组的第 2 季(- 26 → 组 S02E02 = 默认 S01E14)
    await setWordsText(h.db, show, "S01 @ABS >> S02 EP-24\n");
    await writeFile(join(h.dl, "[ABS] Split Cour - 26 [1080p].mkv"), "abs".padEnd(64, "x"));
    const dry = await h.api("POST", "/files/organize", {
      idempotencyKey: key(),
      action: "copy",
      dryRun: true,
      items: [{ root: h.dlRoot, path: "[ABS] Split Cour - 26 [1080p].mkv", mediaEntityId: show }],
      episodeStructures: [{ mediaEntityId: show, groupId: null }],
    });
    expect(dry.status, JSON.stringify(dry.body)).toBe(200);
    const g = dry.body.data.groups[0];
    expect(g.files[0].target).toMatch(/Season 1\/.*S01E14/);
    const art = await h.db
      .selectFrom("artifact")
      .select("content")
      .where("id", "=", g.planId)
      .executeTakeFirstOrThrow();
    const fx = Object.values((art.content as { plan: FrozenPlan }).plan.facts)[0]!;
    expect(fx).toMatchObject({ season: 2, episodes: { start: 2, end: 2 } });
    expect(fx.episodeResolution).toMatchObject({
      method: "rule",
      canonical: { season: 1, episodes: { start: 14, end: 14 } },
    });
  });
});