import { createQbClient } from "@umt/adapters";
import { sql } from "@umt/db";
import { createMockQb, createTempTree, type MockQb, makeTorrent, type TempTree } from "@umt/testkit";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { evaluateAcquisition } from "../../src/modules/acquisition-organize/services/acquisition.ts";
import {
  cleanupCandidates,
  MISSING_CONFIRM_ROUNDS,
  submitDownload,
  syncDownloads,
} from "../../src/modules/acquisition-organize/services/downloads.ts";
import { executeRecord, planImport } from "../../src/modules/acquisition-organize/services/organize.ts";
import { loadVolumes } from "../../src/modules/acquisition-organize/services/volumes.ts";
import {
  createHarness,
  fakeDisk,
  type Harness,
  pgAvailable,
  seedBase,
  seedEntity,
  seedRelease,
  seedSlot,
} from "./harness.ts";

// 下载调度卡死修复:removed 行再次提交复活、同 hash 第二个计划不成孤儿、已入库任务不被 qB 中间态改回、
// 多轮缺席才判移除、卡住 / 异常恢复后事项自动关闭。真实 PG + mock qB;无进展阈值设为 0 方便构造 stalled。

const hasPg = await pgAvailable();
const SIZE = 300_000;

describe.skipIf(!hasPg)("下载同步与提交的卡死修复(真实 PG + mock qB)", () => {
  let h: Harness;
  let qb: MockQb;
  let lib: TempTree;
  let cache: TempTree;
  const disk = fakeDisk(10_000_000);
  const torrents = new Map<string, Uint8Array>();
  let base: Awaited<ReturnType<typeof seedBase>>;

  beforeAll(async () => {
    qb = await createMockQb({ addVisibleAfterPolls: 0 });
    lib = await createTempTree({}, { sentinel: true, prefix: "umt-lib-" });
    cache = await createTempTree({}, { prefix: "umt-cache-" });
    disk.state.watch = [cache.root];
    disk.setPct(40);
    h = await createHarness("dl_recovery", {
      diskUsage: disk.fn,
      torrentSource: async ({ release }) => ({ kind: "file", bytes: torrents.get(release.id)! }),
      options: { noProgressMs: 0 },
    });
    base = await seedBase(h.db, { libraryPath: lib.root, cachePath: cache.root, qbUrl: qb.url });
    await h.setSettings("retention", { seedRetentionDays: 0 });
  }, 60_000);

  afterAll(async () => {
    await h?.close();
    await qb?.close();
    await lib?.cleanup();
    await cache?.cleanup();
  });

  const ext = () => createQbClient({ instanceId: "t", baseUrl: qb.url, username: "admin", password: "adminadmin" });
  const dtRow = (id: string) =>
    h.db.selectFrom("download_task").selectAll().where("id", "=", id).executeTakeFirstOrThrow();
  const planRow = (id: string) =>
    h.db.selectFrom("acquisition_plan").selectAll().where("id", "=", id).executeTakeFirstOrThrow();
  const slotRow = (id: string) =>
    h.db.selectFrom("acquisition_slot").selectAll().where("id", "=", id).executeTakeFirstOrThrow();
  const decision = (key: string) =>
    h.db
      .selectFrom("decision")
      .selectAll()
      .where("dedupe_key", "=", key)
      .orderBy("created_at", "desc")
      .executeTakeFirst();

  async function movie(title: string, year: number) {
    const entityId = await seedEntity(h.db, { kind: "movie", title, year });
    const slotId = await seedSlot(h.db, { entityId });
    return { entityId, slotId };
  }

  async function release(entityId: string, title: string) {
    const t = makeTorrent({ name: `${title}.mkv`, length: SIZE, pieceSeed: Math.floor(Math.random() * 1e6) });
    const id = await seedRelease(h.db, { siteId: base.siteId, entityId, title, size: SIZE, hash: t.hash });
    torrents.set(id, t.bytes);
    return { id, hash: t.hash };
  }

  async function planFor(releaseId: string) {
    const ev = await evaluateAcquisition(h.d, { sourceReleaseId: releaseId });
    expect(ev.plans).toHaveLength(1);
    return ev.plans[0]!;
  }

  /** 手动获取:同一资源可再次明确选择(slot_id 为空、evaluation.manual) */
  async function manualPlanLike(planId: string, entityId: string) {
    const r = await sql<{ id: string }>`
      insert into acquisition_plan (slot_id, source_release_id, purpose, status, priority, evaluation, reserved_bytes,
                                    budget_reservation, payload_hash, idempotency_key, status_reason)
      select null, source_release_id, 'fill', 'reserved', 'immediate',
             evaluation || ${JSON.stringify({ manual: true, mediaEntityId: entityId, importMode: "add" })}::jsonb,
             reserved_bytes, '{}'::jsonb, payload_hash, ${`manual:${crypto.randomUUID()}`}, 'manual_selection'
        from acquisition_plan where id = ${planId}
      returning id`.execute(h.db);
    return r.rows[0]!.id;
  }

  async function syncTimes(n: number) {
    for (let i = 0; i < n; i++) await syncDownloads(h.d);
  }

  it("removed 行再次提交:行复活挂到新计划,完成后换代发完成事件并能入库", async () => {
    const { entityId } = await movie("复活片", 2021);
    const rel = await release(entityId, "Revive.Movie.2021.1080p.BluRay.x264-GRP");
    const p1 = await planFor(rel.id);
    const s1 = await submitDownload(h.d, p1);
    expect(s1).toMatchObject({ status: "submitted", reason: "added" });
    const dtId = s1.downloadTaskId!;

    await ext().delete([rel.hash], { deleteFiles: false });
    await syncTimes(MISSING_CONFIRM_ROUNDS);
    expect(await dtRow(dtId)).toMatchObject({ status: "removed" });
    expect((await dtRow(dtId)).removed_at).not.toBeNull();
    expect(await planRow(p1)).toMatchObject({ status: "failed", status_reason: "download_removed" });

    // 用户再次明确选择同一资源
    const p2 = await manualPlanLike(p1, entityId);
    const s2 = await submitDownload(h.d, p2);
    expect(s2).toMatchObject({ status: "submitted", reason: "added", downloadTaskId: dtId });
    const revived = await dtRow(dtId);
    expect(revived).toMatchObject({
      status: "queued",
      removed_at: null,
      completed_at: null,
      acquisition_plan_id: p2,
      import_plan_id: p2,
      origin: "submitted",
      missing_count: 0,
      generation: 1,
    });
    expect(await planRow(p2)).toMatchObject({ status: "submitted", status_reason: "added" });

    await qb.complete(rel.hash, { writeFiles: true });
    const sync = await syncDownloads(h.d);
    expect(sync.completed).toContain(dtId);
    const done = (await h.outbox("download.status_changed")).filter(
      (e) => e.payload.downloadTaskId === dtId && e.payload.to === "completed",
    );
    expect(done.map((e) => e.idempotency_key)).toEqual([`download.completed:${dtId}:g1`]);

    const plan = await planImport(h.d, { downloadTaskId: dtId, trigger: "auto", actorType: "system" });
    expect(plan.status).toBe("running");
    expect(await executeRecord(h.d, plan.recordId!)).toMatchObject({ status: "succeeded", succeeded: 1 });
    expect((await dtRow(dtId)).status).toBe("imported");
  }, 60_000);

  it("removed 行被重新贴管理标签:接管时复活为 adopted 行", async () => {
    const { entityId } = await movie("接管复活", 2020);
    const rel = await release(entityId, "Adopt.Revive.2020.1080p.WEB-DL.x264-GRP");
    const s = await submitDownload(h.d, await planFor(rel.id));
    const dtId = s.downloadTaskId!;
    await ext().delete([rel.hash], { deleteFiles: false });
    await syncTimes(MISSING_CONFIRM_ROUNDS);
    expect((await dtRow(dtId)).status).toBe("removed");

    qb.seed({ hash: rel.hash, name: "Adopt.Revive.2020.1080p.WEB-DL.x264-GRP.mkv", tags: ["umt"], size: SIZE });
    qb.setProgress(rel.hash, 0.2);
    const st = await syncDownloads(h.d);
    expect(st.adopted).toBe(1);
    expect(await dtRow(dtId)).toMatchObject({
      origin: "adopted",
      acquisition_plan_id: null,
      removed_at: null,
      status: "downloading",
      generation: 1,
    });
  }, 60_000);

  it("同 hash 已挂在途计划:第二个计划取消并释放 Slot 预留,不留 submitted 孤儿", async () => {
    const { entityId } = await movie("同种双计划", 2022);
    const rel = await release(entityId, "Shared.Hash.2022.1080p.BluRay.x264-GRP");
    const p1 = await planFor(rel.id);
    const s1 = await submitDownload(h.d, p1);
    expect(s1.status).toBe("submitted");

    // 另一个 Slot(另一订阅 / 版本)跨轮次选中同一资源
    const slot2 = await seedSlot(h.db, { entityId, name: "second" });
    const ev = await evaluateAcquisition(h.d, { acquisitionSlotId: slot2 });
    expect(ev.plans).toHaveLength(1);
    const p2 = ev.plans[0]!;
    expect((await slotRow(slot2)).status).toBe("reserved");
    const out = await submitDownload(h.d, p2);
    expect(out).toEqual({ status: "skipped", reason: "torrent_in_use_by_plan" });
    expect(await planRow(p2)).toMatchObject({ status: "cancelled", status_reason: `torrent_in_use_by_plan:${p1}` });
    const s2 = await slotRow(slot2);
    expect(["reserved", "downloading", "verifying"]).not.toContain(s2.status);
    expect(s2.reserved_plan_id).toBeNull();
    // 任务行仍只推进第一个计划;同一资源只剩一个 submitted 计划
    expect((await dtRow(s1.downloadTaskId!)).acquisition_plan_id).toBe(p1);
    expect(
      await h.db
        .selectFrom("acquisition_plan")
        .select("id")
        .where("source_release_id", "=", rel.id)
        .where("status", "=", "submitted")
        .execute(),
    ).toEqual([{ id: p1 }]);
  }, 60_000);

  it("已入库任务经 checkingResumeData / checkingUP / moving 再回到完成:仍是 imported,completed_at 不变,清理仍能选中", async () => {
    const { entityId } = await movie("回退片", 2019);
    const rel = await release(entityId, "Regress.Movie.2019.1080p.BluRay.x264-GRP");
    const s = await submitDownload(h.d, await planFor(rel.id));
    const dtId = s.downloadTaskId!;
    await qb.complete(rel.hash, { writeFiles: true });
    await syncDownloads(h.d);
    const plan = await planImport(h.d, { downloadTaskId: dtId, trigger: "auto", actorType: "system" });
    expect(await executeRecord(h.d, plan.recordId!)).toMatchObject({ status: "succeeded" });
    const before = await dtRow(dtId);
    expect(before.status).toBe("imported");
    expect(before.completed_at).not.toBeNull();

    const t = qb.get(rel.hash)!;
    const done = t.state;
    for (const [state, progress] of [
      ["checkingResumeData", 1],
      ["queuedDL", 1],
      ["checkingUP", 0.4],
      ["moving", 1],
    ] as const) {
      t.state = state;
      t.progress = progress;
      await syncDownloads(h.d);
      const row = await dtRow(dtId);
      expect(row.status, state).toBe("imported");
      expect(row.raw_state, state).toBe(state);
    }
    qb.setProgress(rel.hash, 1);
    t.state = done;
    await syncDownloads(h.d);
    const after = await dtRow(dtId);
    expect(after.status).toBe("imported");
    expect(after.completed_at?.getTime()).toBe(before.completed_at!.getTime());
    expect(after.no_progress_since).toBeNull();
    const completedEvents = (await h.outbox("download.status_changed")).filter(
      (e) => e.payload.downloadTaskId === dtId && e.payload.from === "imported",
    );
    expect(completedEvents).toHaveLength(0);

    const vol = (await loadVolumes(h.d))[0]!;
    const cand = (await cleanupCandidates(h.d, vol)).find((c) => c.row.id === dtId);
    expect(cand).toMatchObject({ cleanable: true, lockReason: null });
  }, 60_000);

  it("qB 一轮查不到不判移除;连续缺席达到阈值才判移除;中途重新出现清掉缺席", async () => {
    const { entityId } = await movie("缺席片", 2018);
    const rel = await release(entityId, "Missing.Movie.2018.1080p.BluRay.x264-GRP");
    const p = await planFor(rel.id);
    const s = await submitDownload(h.d, p);
    const dtId = s.downloadTaskId!;
    const name = qb.get(rel.hash)!.name;

    // qB 刚重启:列表与按 hash 都查不到
    await ext().delete([rel.hash], { deleteFiles: false });
    const st1 = await syncDownloads(h.d);
    expect(st1.removed).toBe(0);
    const r1 = await dtRow(dtId);
    expect(r1).toMatchObject({ removed_at: null, missing_count: 1 });
    expect(r1.status).not.toBe("removed");
    expect(r1.missing_since).not.toBeNull();
    expect((await planRow(p)).status).toBe("submitted");

    // 任务加载回来:缺席清零
    qb.seed({ hash: rel.hash, name, tags: ["umt"], size: SIZE });
    qb.setProgress(rel.hash, 0.3);
    await syncDownloads(h.d);
    expect(await dtRow(dtId)).toMatchObject({ missing_count: 0, missing_since: null, removed_at: null });

    // 真被删:连续缺席到阈值才判移除
    await ext().delete([rel.hash], { deleteFiles: false });
    await syncTimes(MISSING_CONFIRM_ROUNDS - 1);
    expect((await dtRow(dtId)).removed_at).toBeNull();
    expect((await dtRow(dtId)).missing_count).toBe(MISSING_CONFIRM_ROUNDS - 1);
    const st = await syncDownloads(h.d);
    expect(st.removed).toBe(1);
    expect(await dtRow(dtId)).toMatchObject({ status: "removed" });
    expect(await planRow(p)).toMatchObject({ status: "failed", status_reason: "download_removed" });
  }, 60_000);

  it("stalled / 异常后恢复:同一任务未关闭的事项自动关闭为 resolved", async () => {
    const { entityId } = await movie("卡住片", 2017);
    const rel = await release(entityId, "Stalled.Movie.2017.1080p.BluRay.x264-GRP");
    const s = await submitDownload(h.d, await planFor(rel.id));
    const dtId = s.downloadTaskId!;
    qb.setState(rel.hash, "downloading");
    qb.setProgress(rel.hash, 0.2);
    await syncDownloads(h.d); // 有进展
    await syncDownloads(h.d); // 字节不增长,阈值 0 → stalled
    expect((await dtRow(dtId)).status).toBe("stalled");
    expect(await decision(`download_stalled:${dtId}`)).toMatchObject({ kind: "download_stalled", status: "open" });

    qb.setProgress(rel.hash, 0.5);
    await syncDownloads(h.d);
    expect((await dtRow(dtId)).status).toBe("downloading");
    const closed = await decision(`download_stalled:${dtId}`);
    expect(closed).toMatchObject({ status: "resolved", resolved_by: "system:download-sync" });
    expect((await h.outbox("decision.updated")).map((e) => e.payload)).toContainEqual({
      decisionId: closed!.id,
      status: "resolved",
    });

    // qB 报错 → download_failed;恢复下载 → 关闭
    qb.setError(rel.hash);
    await syncDownloads(h.d);
    expect((await dtRow(dtId)).status).toBe("failed");
    expect(await decision(`download_failed:${dtId}`)).toMatchObject({ status: "open" });
    qb.setState(rel.hash, "downloading");
    qb.setProgress(rel.hash, 0.7);
    await syncDownloads(h.d);
    expect((await dtRow(dtId)).status).toBe("downloading");
    expect(await decision(`download_failed:${dtId}`)).toMatchObject({ status: "resolved" });
  }, 60_000);
});