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import { afterEach, describe, expect, it, vi } from "vitest";
import { importFreshModule } from "../../test/helpers/import-fresh.js";
import {
  clearSlackThreadParticipationCache,
  hasSlackThreadParticipation,
  recordSlackThreadParticipation,
} from "./sent-thread-cache.js";

describe("slack sent-thread-cache", () => {
  afterEach(() => {
    clearSlackThreadParticipationCache();
    vi.restoreAllMocks();
  });

  it("records and checks thread participation", () => {
    recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(true);
  });

  it("returns false for unrecorded threads", () => {
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(false);
  });

  it("distinguishes different channels and threads", () => {
    recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000002")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "C456", "1700000000.000001")).toBe(false);
  });

  it("scopes participation by accountId", () => {
    recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
    expect(hasSlackThreadParticipation("A2", "C123", "1700000000.000001")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(true);
  });

  it("ignores empty accountId, channelId, or threadTs", () => {
    recordSlackThreadParticipation("", "C123", "1700000000.000001");
    recordSlackThreadParticipation("A1", "", "1700000000.000001");
    recordSlackThreadParticipation("A1", "C123", "");
    expect(hasSlackThreadParticipation("", "C123", "1700000000.000001")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "", "1700000000.000001")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "C123", "")).toBe(false);
  });

  it("clears all entries", () => {
    recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
    recordSlackThreadParticipation("A1", "C456", "1700000000.000002");
    clearSlackThreadParticipationCache();
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "C456", "1700000000.000002")).toBe(false);
  });

  it("shares thread participation across distinct module instances", async () => {
    const cacheA = await importFreshModule<typeof import("./sent-thread-cache.js")>(
      import.meta.url,
      "./sent-thread-cache.js?scope=shared-a",
    );
    const cacheB = await importFreshModule<typeof import("./sent-thread-cache.js")>(
      import.meta.url,
      "./sent-thread-cache.js?scope=shared-b",
    );

    cacheA.clearSlackThreadParticipationCache();

    try {
      cacheA.recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
      expect(cacheB.hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(true);

      cacheB.clearSlackThreadParticipationCache();
      expect(cacheA.hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(false);
    } finally {
      cacheA.clearSlackThreadParticipationCache();
    }
  });

  it("expired entries return false and are cleaned up on read", () => {
    recordSlackThreadParticipation("A1", "C123", "1700000000.000001");
    // Advance time past the 24-hour TTL
    vi.spyOn(Date, "now").mockReturnValue(Date.now() + 25 * 60 * 60 * 1000);
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000001")).toBe(false);
  });

  it("enforces maximum entries by evicting oldest fresh entries", () => {
    for (let i = 0; i < 5001; i += 1) {
      recordSlackThreadParticipation("A1", "C123", `1700000000.${String(i).padStart(6, "0")}`);
    }

    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.000000")).toBe(false);
    expect(hasSlackThreadParticipation("A1", "C123", "1700000000.005000")).toBe(true);
  });
});