import { afterAll, beforeAll, describe, expect, it } from "vitest";
import {
  createHarness,
  type Harness,
  pgAvailable,
  seedEntity,
} from "../../src/modules/acquisition-organize/__tests__/harness.ts";
import { MEDIA_SERVER_LIMITS } from "../../src/modules/acquisition-organize/routes/library.ts";

// C1-D:GET /inventory/media-servers 按实例并行(allSettled)+ 实例内并发上限 + 整实例超时;部分失败 partial=true。

const hasPg = await pgAvailable();
const sleep = (ms: number) => new Promise((r) => setTimeout(r, ms));

describe.skipIf(!hasPg)("GET /inventory/media-servers 并行 + 超时 + partial", () => {
  let h: Harness;
  let entityId: string;
  const ids: Record<string, string> = {};
  const saved = { ...MEDIA_SERVER_LIMITS };
  const inflight: Record<string, { now: number; max: number }> = {};

  beforeAll(async () => {
    h = await createHarness("msinv");
    MEDIA_SERVER_LIMITS.timeoutMs = 400;
    MEDIA_SERVER_LIMITS.perInstanceConcurrency = 2;
    entityId = await seedEntity(h.db, { kind: "movie", title: "并行库存", year: 2020 });
    await h.db
      .insertInto("external_identity")
      .values(
        ["tmdb", "imdb", "tvdb"].map((provider, i) => ({
          media_entity_id: entityId,
          provider,
          entity_type: "movie",
          external_id: `x${i}`,
          status: "accepted",
        })) as never,
      )
      .execute();
    for (const name of ["a-ok", "b-slow", "c-boom"]) {
      const r = await h.db
        .insertInto("media_server_instance")
        .values({ name, base_url: `http://${name}.invalid` })
        .returning("id")
        .executeTakeFirstOrThrow();
      ids[name] = r.id;
      inflight[name] = { now: 0, max: 0 };
    }
    h.d.ports.mediaServer = (async (inst: { name: string }) => {
      if (inst.name === "c-boom") throw new Error("connect refused");
      return {
        async findByProviderId(provider: string) {
          const f = inflight[inst.name]!;
          f.now++;
          f.max = Math.max(f.max, f.now);
          try {
            await sleep(inst.name === "b-slow" ? 5_000 : 60);
            return provider === "Tmdb"
              ? {
                  status: "present" as const,
                  items: [{ itemId: "i1", type: "Movie", name: "并行库存", year: 2020, path: "/m", versions: [] }],
                }
              : { status: "not_found" as const };
          } finally {
            f.now--;
          }
        },
      };
    }) as never;
  }, 60_000);

  afterAll(async () => {
    Object.assign(MEDIA_SERVER_LIMITS, saved);
    await h?.close();
  });

  it("实例并行、慢实例超时、异常实例 unknown,整体 partial", async () => {
    const t0 = Date.now();
    const r = await h.api("GET", `/inventory/media-servers?mediaEntityId=${entityId}`);
    const took = Date.now() - t0;
    expect(r.status).toBe(200);
    type Inst = { name: string; status: string; reason: string | null; items: unknown[] };
    const by = Object.fromEntries((r.body.data.instances as Inst[]).map((x) => [x.name, x]));
    expect(by["a-ok"]).toMatchObject({ status: "present", reason: null });
    expect(by["a-ok"]!.items).toHaveLength(1);
    expect(by["b-slow"]).toMatchObject({ status: "unknown" });
    expect(by["b-slow"]!.reason).toMatch(/^timeout/);
    expect(by["c-boom"]).toMatchObject({ status: "unknown", reason: "connect refused" });
    expect(r.body.data.partial).toBe(true);
    // 串行时至少 0.4s(b 超时)+ 3×60ms;并行应接近单个超时
    expect(took).toBeLessThan(2_000);
    // 实例内并发上限 2(3 个外部 ID)
    expect(inflight["a-ok"]!.max).toBe(2);
  });

  it("全部成功时 partial=false;无外部 ID 的 unknown 不算失败", async () => {
    await h.db.updateTable("media_server_instance").set({ enabled: false }).where("name", "!=", "a-ok").execute();
    const r = await h.api("GET", `/inventory/media-servers?mediaEntityId=${entityId}`);
    expect(r.body.data.partial).toBe(false);
    const bareId = await seedEntity(h.db, { kind: "movie", title: "无外部ID", year: 2021 });
    const r2 = await h.api("GET", `/inventory/media-servers?mediaEntityId=${bareId}`);
    expect(r2.body.data.instances[0]).toMatchObject({ status: "unknown", reason: "no_external_id" });
    expect(r2.body.data.partial).toBe(false);
  });
});