import { beforeEach, describe, expect, it, vi } from "vitest";

const hoisted = vi.hoisted(() => {
  const updateSessionStore = vi.fn();
  const resolveStorePath = vi.fn(() => "/tmp/openclaw-sessions.json");
  return { updateSessionStore, resolveStorePath };
});

vi.mock("openclaw/plugin-sdk/config-runtime", async (importOriginal) => {
  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/config-runtime")>();
  return {
    ...actual,
    updateSessionStore: hoisted.updateSessionStore,
    resolveStorePath: hoisted.resolveStorePath,
  };
});

const { closeDiscordThreadSessions } = await import("./thread-session-close.js");

function setupStore(store: Record<string, { updatedAt: number }>) {
  hoisted.updateSessionStore.mockImplementation(
    async (_storePath: string, mutator: (s: typeof store) => unknown) => mutator(store),
  );
}

const THREAD_ID = "999";
const OTHER_ID = "111";

const MATCHED_KEY = `agent:main:discord:channel:${THREAD_ID}`;
const UNMATCHED_KEY = `agent:main:discord:channel:${OTHER_ID}`;

describe("closeDiscordThreadSessions", () => {
  beforeEach(() => {
    hoisted.updateSessionStore.mockClear();
    hoisted.resolveStorePath.mockClear();
    hoisted.resolveStorePath.mockReturnValue("/tmp/openclaw-sessions.json");
  });

  it("resets updatedAt to 0 for sessions whose key contains the threadId", async () => {
    const store = {
      [MATCHED_KEY]: { updatedAt: 1_700_000_000_000 },
      [UNMATCHED_KEY]: { updatedAt: 1_700_000_000_001 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID,
    });

    expect(count).toBe(1);
    expect(store[MATCHED_KEY].updatedAt).toBe(0);
    expect(store[UNMATCHED_KEY].updatedAt).toBe(1_700_000_000_001);
  });

  it("returns 0 and leaves store unchanged when no session matches", async () => {
    const store = {
      [UNMATCHED_KEY]: { updatedAt: 1_700_000_000_001 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID,
    });

    expect(count).toBe(0);
    expect(store[UNMATCHED_KEY].updatedAt).toBe(1_700_000_000_001);
  });

  it("resets all matching sessions when multiple keys contain the threadId", async () => {
    const keyA = `agent:main:discord:channel:${THREAD_ID}`;
    const keyB = `agent:work:discord:channel:${THREAD_ID}`;
    const keyC = `agent:main:discord:channel:${OTHER_ID}`;
    const store = {
      [keyA]: { updatedAt: 1_000 },
      [keyB]: { updatedAt: 2_000 },
      [keyC]: { updatedAt: 3_000 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID,
    });

    expect(count).toBe(2);
    expect(store[keyA].updatedAt).toBe(0);
    expect(store[keyB].updatedAt).toBe(0);
    expect(store[keyC].updatedAt).toBe(3_000);
  });

  it("does not match a key that contains the threadId as a substring of a longer snowflake", async () => {
    const longerSnowflake = `${THREAD_ID}00`;
    const noMatchKey = `agent:main:discord:channel:${longerSnowflake}`;
    const store = {
      [noMatchKey]: { updatedAt: 9_999 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID,
    });

    expect(count).toBe(0);
    expect(store[noMatchKey].updatedAt).toBe(9_999);
  });

  it("matching is case-insensitive for the session key", async () => {
    const uppercaseKey = `agent:main:discord:channel:${THREAD_ID.toUpperCase()}`;
    const store = {
      [uppercaseKey]: { updatedAt: 5_000 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID.toLowerCase(),
    });

    expect(count).toBe(1);
    expect(store[uppercaseKey].updatedAt).toBe(0);
  });

  it("returns 0 immediately when threadId is empty without touching the store", async () => {
    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: "   ",
    });

    expect(count).toBe(0);
    expect(hoisted.updateSessionStore).not.toHaveBeenCalled();
  });

  it("does not recount sessions that were already reset", async () => {
    const store = {
      [MATCHED_KEY]: { updatedAt: 0 },
      [UNMATCHED_KEY]: { updatedAt: 1_700_000_000_001 },
    };
    setupStore(store);

    const count = await closeDiscordThreadSessions({
      cfg: {},
      accountId: "default",
      threadId: THREAD_ID,
    });

    expect(count).toBe(0);
    expect(store[MATCHED_KEY].updatedAt).toBe(0);
    expect(store[UNMATCHED_KEY].updatedAt).toBe(1_700_000_000_001);
  });

  it("resolves the store path using cfg.session.store and accountId", async () => {
    const store = {};
    setupStore(store);

    await closeDiscordThreadSessions({
      cfg: { session: { store: "/custom/path/sessions.json" } },
      accountId: "my-bot",
      threadId: THREAD_ID,
    });

    expect(hoisted.resolveStorePath).toHaveBeenCalledWith("/custom/path/sessions.json", {
      agentId: "my-bot",
    });
  });
});