import { sql } from "@umt/db";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { createHarness, type Harness, pgAvailable, seedEntity, seedRelease, seedSlot } from "./harness.ts";

// DL-3 下载计划并入下载面板:等批准 / 等磁盘空间的计划作为「进行中」行与下载任务按时间一起排、计入计数;
// 深链按计划 id 取行;「为什么下这个」;取消还没提交的下载;没提交就结束的进作品下载历史;
// 审批被拒 / 过期时草案跟着结束。

const hasPg = await pgAvailable();
const h40 = (n: number) => n.toString(16).padStart(40, "c");
type Row = { kind: "task" | "plan"; id: string; name: string; wait?: string; waitReason?: string | null };

describe.skipIf(!hasPg)("DL-3 下载计划并入下载面板(真实 PG)", () => {
  let h: Harness;
  let entity: string;
  let siteId: string;
  const ids = {} as Record<"reserved" | "draft" | "orphan" | "submitted" | "failed" | "agentDraft", string>;
  const slots = {} as Record<string, string>;
  let taskId: string;
  let instId: string;

  const at = (min: number) => new Date(Date.UTC(2026, 8, 30, 8, min));

  async function plan(
    key: keyof typeof ids,
    p: { status: string; min: number; purpose?: string; evaluation?: Record<string, unknown>; reason?: string },
  ) {
    const slot = await seedSlot(h.db, { entityId: entity, name: key === "submitted" ? "4K" : `slot-${key}` });
    slots[key] = slot;
    const rel = await seedRelease(h.db, {
      siteId,
      entityId: entity,
      title: `Severance.S02.${key}.2160p`,
      size: 10_000_000_000,
      hash: h40(Object.keys(ids).length + 1),
    });
    await h.db
      .updateTable("source_release")
      .set({ promotion: JSON.stringify({ kind: "free" }), seeders: 41 })
      .where("id", "=", rel)
      .execute();
    const row = await h.db
      .insertInto("acquisition_plan")
      .values({
        slot_id: slot,
        source_release_id: rel,
        purpose: (p.purpose ?? "fill") as "fill",
        status: p.status as "draft",
        evaluation: JSON.stringify(p.evaluation ?? { reasons: ["hard_conditions_met", "pri:90"], instanceId: instId }),
        reserved_bytes: 10_000_000_000,
        payload_hash: `hash-${key}`,
        idempotency_key: `test:${key}`,
        status_reason: p.reason ?? null,
        created_at: at(p.min),
      })
      .returning("id")
      .executeTakeFirstOrThrow();
    ids[key] = row.id;
    if (p.status === "reserved")
      await h.db
        .updateTable("acquisition_slot")
        .set({ status: "reserved", reserved_plan_id: row.id })
        .where("id", "=", slot)
        .execute();
    return row.id;
  }

  async function approval(planId: string, status = "pending", scope: Record<string, unknown> = {}) {
    return (
      await h.db
        .insertInto("approval")
        .values({
          plan_type: "acquisition_plan",
          plan_id: planId,
          payload_hash: "hash-x",
          expected_revision: 1,
          scope: JSON.stringify(scope),
          status: status as "pending",
          requested_by: "agent:test",
          expires_at: new Date(Date.now() + 3600_000),
        })
        .returning("id")
        .executeTakeFirstOrThrow()
    ).id;
  }

  beforeAll(async () => {
    h = await createHarness("dl3plans");
    entity = await seedEntity(h.db, { kind: "series", title: "人生切割术", year: 2022 });
    siteId = (
      await h.db
        .insertInto("site")
        .values({ key: "dl3site", name: "测试站", adapter: "nexusphp", base_url: "https://pt.example.test" })
        .returning("id")
        .executeTakeFirstOrThrow()
    ).id;
    // 下载器停用:面板不去连 qB,只看数据库
    instId = (
      await h.db
        .insertInto("downloader_instance")
        .values({ name: "qb", base_url: "http://127.0.0.1:9", username: "a", enabled: false })
        .returning("id")
        .executeTakeFirstOrThrow()
    ).id;

    // 时间线(新 → 旧):已预留等空间(50)> 下载中的任务(40)> 等批准(30)> 智能体草案(25)> 孤立草案(20)> 失败(10)
    await plan("failed", { status: "failed", min: 10, reason: "rejected: torrent is invalid" });
    await plan("orphan", { status: "draft", min: 20 });
    await plan("agentDraft", { status: "draft", min: 25 });
    await plan("draft", { status: "draft", min: 30 });
    await plan("submitted", { status: "submitted", min: 35 });
    await plan("reserved", { status: "reserved", min: 50 });
    await approval(ids.draft);
    await approval(ids.agentDraft, "pending", { agentRunId: "x" });

    taskId = (
      await h.db
        .insertInto("download_task")
        .values({
          instance_id: instId,
          torrent_hash: h40(99),
          acquisition_plan_id: ids.submitted,
          name: "Severance.S02.submitted.2160p",
          status: "downloading",
          managed: true,
          media_entity_id: entity,
          created_at: at(40),
        })
        .returning("id")
        .executeTakeFirstOrThrow()
    ).id;
    // 已预留的提交任务被下载盘阈值延后
    await h.db
      .insertInto("task")
      .values({
        kind: "submitDownload",
        idempotency_key: `plan:${ids.reserved}`,
        status: "waiting",
        subject_type: "acquisition_plan",
        subject_id: ids.reserved,
        output: JSON.stringify({ status: "deferred", reason: "cache:projected_over_threshold" }),
      })
      .execute();
    // 智能体会话准备的草案
    const run = await h.db
      .insertInto("agent_run")
      .values({ trigger: "user", goal: "补齐人生切割术第二季的 4K 版本" })
      .returning("id")
      .executeTakeFirstOrThrow();
    await h.db
      .insertInto("capability_invocation")
      .values({
        idempotency_key: "inv-1",
        capability_id: "download.plan",
        capability_version: 1,
        agent_run_id: run.id,
        actor_id: "agent",
        source: "agent",
        status: "succeeded",
        input: JSON.stringify({}),
        output: JSON.stringify({ plan: { id: ids.agentDraft } }),
      })
      .execute();
  }, 60_000);

  afterAll(async () => {
    await h?.close();
  });

  it("进行中:等批准、等磁盘空间的计划与下载任务按加入时间一起排,计数包含它们;孤立草案不出现", async () => {
    const r = await h.api("GET", "/download-tasks/board");
    expect(r.status).toBe(200);
    const b = r.body.data;
    const rows = b.items as Row[];
    expect(rows.map((x) => [x.kind, x.id])).toEqual([
      ["plan", ids.reserved],
      ["task", taskId],
      ["plan", ids.draft],
      ["plan", ids.agentDraft],
    ]);
    expect(b.counts).toEqual({ active: 4, completed: 0 });
    const reserved = b.items[0];
    expect(reserved).toMatchObject({
      wait: "space",
      waitReason: "cache:projected_over_threshold",
      status: "reserved",
      purpose: "fill",
      name: "Severance.S02.reserved.2160p",
      sizeBytes: 10_000_000_000,
      media: { id: entity, title: "人生切割术", year: 2022 },
      approval: null,
    });
    const draft = b.items[2];
    expect(draft).toMatchObject({ wait: "approval", status: "draft", approval: { payloadHash: "hash-x" } });
    // 已完成分组不含计划
    const done = (await h.api("GET", "/download-tasks/board?state=completed")).body.data;
    expect(done.items).toEqual([]);
  });

  it("翻页:两路按同一游标归并,不重不漏", async () => {
    const p1 = (await h.api("GET", "/download-tasks/board?limit=3")).body.data;
    expect(p1.items.map((x: Row) => x.id)).toEqual([ids.reserved, taskId, ids.draft]);
    expect(p1.nextCursor).toBeTruthy();
    const p2 = (await h.api("GET", `/download-tasks/board?limit=3&cursor=${encodeURIComponent(p1.nextCursor)}`)).body
      .data;
    expect(p2.items.map((x: Row) => x.id)).toEqual([ids.agentDraft]);
    expect(p2.nextCursor).toBeNull();
  });

  it("深链 planId:等待中的计划给计划行,已提交的给它的下载任务,结束的没有行", async () => {
    const a = (await h.api("GET", `/download-tasks/board?planId=${ids.reserved}`)).body.data;
    expect(a.items.map((x: Row) => [x.kind, x.id])).toEqual([["plan", ids.reserved]]);
    const b = (await h.api("GET", `/download-tasks/board?planId=${ids.submitted}&state=completed`)).body.data;
    expect(b.items.map((x: Row) => [x.kind, x.id])).toEqual([["task", taskId]]);
    const c = (await h.api("GET", `/download-tasks/board?planId=${ids.failed}`)).body.data;
    expect(c.items).toEqual([]);
  });

  it("为什么下这个:订阅 / 智能体会话来源、目的、选中理由原始要点", async () => {
    const sub = (await h.api("GET", `/acquisition-plans/${ids.submitted}/why`)).body.data;
    expect(sub).toMatchObject({
      planId: ids.submitted,
      source: { kind: "subscription", name: "人生切割术" },
      purpose: "fill",
      slotName: "4K",
      replaces: null,
      reasons: ["hard_conditions_met", "pri:90"],
      promotion: "free",
      seeders: 41,
      siteName: "测试站",
    });
    expect(sub.evaluation.reasons).toEqual(["hard_conditions_met", "pri:90"]);
    const agent = (await h.api("GET", `/acquisition-plans/${ids.agentDraft}/why`)).body.data;
    expect(agent.source).toMatchObject({ kind: "agent", name: "补齐人生切割术第二季的 4K 版本" });
    expect((await h.api("GET", `/acquisition-plans/${crypto.randomUUID()}/why`)).status).toBe(404);
  });

  it("升级:被替换的版本取评估时记下的文件规格", async () => {
    const asset = await h.db
      .insertInto("media_asset")
      .values({
        media_entity_id: entity,
        kind: "video",
        delivery: JSON.stringify({ resolution: "1080p", source: "BluRay", hdr: [], releaseGroup: "CMCT" }),
      })
      .returning("id")
      .executeTakeFirstOrThrow();
    await h.db
      .updateTable("acquisition_plan")
      .set({
        purpose: "upgrade",
        evaluation: JSON.stringify({ reasons: ["source_tier_improved"], replacesAssetId: asset.id }),
      })
      .where("id", "=", ids.submitted)
      .execute();
    const w = (await h.api("GET", `/acquisition-plans/${ids.submitted}/why`)).body.data;
    expect(w.purpose).toBe("upgrade");
    expect(w.replaces).toEqual({ assetId: asset.id, label: "1080p 蓝光压制 · CMCT" });
  });

  it("取消:已预留的释放收录版本并进下载历史;已提交的 409", async () => {
    const r = await h.api("POST", `/acquisition-plans/${ids.reserved}/cancel`);
    expect(r.status).toBe(200);
    expect(r.body.data).toMatchObject({ status: "cancelled", statusReason: "cancelled_by_user" });
    const slot = await h.db
      .selectFrom("acquisition_slot")
      .select(["status", "reserved_plan_id"])
      .where("id", "=", slots.reserved!)
      .executeTakeFirstOrThrow();
    expect(slot.status).not.toBe("reserved");
    expect((await h.api("POST", `/acquisition-plans/${ids.submitted}/cancel`)).status).toBe(409);
    expect((await h.api("POST", `/acquisition-plans/${ids.reserved}/cancel`)).status).toBe(409);
    const b = (await h.api("GET", "/download-tasks/board")).body.data;
    expect(b.counts.active).toBe(3);
    expect(b.items.some((x: Row) => x.id === ids.reserved)).toBe(false);
  });

  it("作品下载历史:没提交就结束的下载带原因码;孤立草案与进行中的不在里面", async () => {
    const d = (await h.api("GET", `/library/${entity}`)).body.data;
    const dropped = d.droppedPlans.map((x: { plan: { id: string; statusReason: string } }) => [
      x.plan.id,
      x.plan.statusReason,
    ]);
    expect(dropped).toEqual(
      expect.arrayContaining([
        [ids.failed, "rejected: torrent is invalid"],
        [ids.reserved, "cancelled_by_user"],
      ]),
    );
    expect(dropped).toHaveLength(2);
    expect(d.droppedPlans.find((x: { plan: { id: string } }) => x.plan.id === ids.failed).releaseTitle).toBe(
      "Severance.S02.failed.2160p",
    );
  });

  it("审批被拒 / 过期:草案跟着结束,不再算进行中", async () => {
    const { closeDraftPlan } = await import("../../src/modules/agent/interaction.ts");
    await closeDraftPlan(h.db, { plan_type: "acquisition_plan", plan_id: ids.draft }, "rejected");
    await closeDraftPlan(h.db, { plan_type: "acquisition_plan", plan_id: ids.agentDraft }, "expired");
    // 不是草案的不动
    await closeDraftPlan(h.db, { plan_type: "acquisition_plan", plan_id: ids.submitted }, "rejected");
    const rows = await sql<{ id: string; status: string; status_reason: string | null }>`
      select id, status, status_reason from acquisition_plan where id in (${sql.join([ids.draft, ids.agentDraft, ids.submitted])})`.execute(
      h.db,
    );
    const by = new Map(rows.rows.map((r) => [r.id, [r.status, r.status_reason]]));
    expect(by.get(ids.draft)).toEqual(["cancelled", "approval_rejected"]);
    expect(by.get(ids.agentDraft)).toEqual(["expired", "approval_expired"]);
    expect(by.get(ids.submitted)?.[0]).toBe("submitted");
    const b = (await h.api("GET", "/download-tasks/board")).body.data;
    expect(b.items.map((x: Row) => x.kind)).toEqual(["task"]);
    expect(b.counts.active).toBe(1);
  });
});