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

let createTelegramBot: typeof import("./bot.js").createTelegramBot;
let resetInboundDedupe: typeof import("../auto-reply/reply/inbound-dedupe.js").resetInboundDedupe;

const { sessionStorePath } = vi.hoisted(() => ({
  sessionStorePath: `/tmp/clawdbot-telegram-${Math.random().toString(16).slice(2)}.json`,
}));

const { loadWebMedia } = vi.hoisted(() => ({
  loadWebMedia: vi.fn(),
}));

vi.mock("../web/media.js", () => ({
  loadWebMedia,
}));

const { loadConfig } = vi.hoisted(() => ({
  loadConfig: vi.fn(() => ({})),
}));
vi.mock("../config/config.js", async (importOriginal) => {
  const actual = await importOriginal<typeof import("../config/config.js")>();
  return {
    ...actual,
    loadConfig,
  };
});

vi.mock("../config/sessions.js", async (importOriginal) => {
  const actual = await importOriginal<typeof import("../config/sessions.js")>();
  return {
    ...actual,
    resolveStorePath: vi.fn((storePath) => storePath ?? sessionStorePath),
  };
});

const { readTelegramAllowFromStore, upsertTelegramPairingRequest } = vi.hoisted(() => ({
  readTelegramAllowFromStore: vi.fn(async () => [] as string[]),
  upsertTelegramPairingRequest: vi.fn(async () => ({
    code: "PAIRCODE",
    created: true,
  })),
}));

vi.mock("./pairing-store.js", () => ({
  readTelegramAllowFromStore,
  upsertTelegramPairingRequest,
}));

const useSpy = vi.fn();
const middlewareUseSpy = vi.fn();
const onSpy = vi.fn();
const stopSpy = vi.fn();
const commandSpy = vi.fn();
const botCtorSpy = vi.fn();
const answerCallbackQuerySpy = vi.fn(async () => undefined);
const sendChatActionSpy = vi.fn();
const setMessageReactionSpy = vi.fn(async () => undefined);
const setMyCommandsSpy = vi.fn(async () => undefined);
const sendMessageSpy = vi.fn(async () => ({ message_id: 77 }));
const sendAnimationSpy = vi.fn(async () => ({ message_id: 78 }));
const sendPhotoSpy = vi.fn(async () => ({ message_id: 79 }));
type ApiStub = {
  config: { use: (arg: unknown) => void };
  answerCallbackQuery: typeof answerCallbackQuerySpy;
  sendChatAction: typeof sendChatActionSpy;
  setMessageReaction: typeof setMessageReactionSpy;
  setMyCommands: typeof setMyCommandsSpy;
  sendMessage: typeof sendMessageSpy;
  sendAnimation: typeof sendAnimationSpy;
  sendPhoto: typeof sendPhotoSpy;
};
const apiStub: ApiStub = {
  config: { use: useSpy },
  answerCallbackQuery: answerCallbackQuerySpy,
  sendChatAction: sendChatActionSpy,
  setMessageReaction: setMessageReactionSpy,
  setMyCommands: setMyCommandsSpy,
  sendMessage: sendMessageSpy,
  sendAnimation: sendAnimationSpy,
  sendPhoto: sendPhotoSpy,
};

vi.mock("grammy", () => ({
  Bot: class {
    api = apiStub;
    use = middlewareUseSpy;
    on = onSpy;
    stop = stopSpy;
    command = commandSpy;
    constructor(
      public token: string,
      public options?: { client?: { fetch?: typeof fetch } },
    ) {
      botCtorSpy(token, options);
    }
  },
  InputFile: class {},
  webhookCallback: vi.fn(),
}));

const sequentializeMiddleware = vi.fn();
const sequentializeSpy = vi.fn(() => sequentializeMiddleware);
let _sequentializeKey: ((ctx: unknown) => string) | undefined;
vi.mock("@grammyjs/runner", () => ({
  sequentialize: (keyFn: (ctx: unknown) => string) => {
    _sequentializeKey = keyFn;
    return sequentializeSpy();
  },
}));

const throttlerSpy = vi.fn(() => "throttler");

vi.mock("@grammyjs/transformer-throttler", () => ({
  apiThrottler: () => throttlerSpy(),
}));

vi.mock("../auto-reply/reply.js", () => {
  const replySpy = vi.fn(async (_ctx, opts) => {
    await opts?.onReplyStart?.();
    return undefined;
  });
  return { getReplyFromConfig: replySpy, __replySpy: replySpy };
});

let replyModule: typeof import("../auto-reply/reply.js");

const getOnHandler = (event: string) => {
  const handler = onSpy.mock.calls.find((call) => call[0] === event)?.[1];
  if (!handler) throw new Error(`Missing handler for event: ${event}`);
  return handler as (ctx: Record<string, unknown>) => Promise<void>;
};

describe("createTelegramBot", () => {
  beforeEach(async () => {
    vi.resetModules();
    ({ resetInboundDedupe } = await import("../auto-reply/reply/inbound-dedupe.js"));
    ({ createTelegramBot } = await import("./bot.js"));
    replyModule = await import("../auto-reply/reply.js");
    resetInboundDedupe();
    loadConfig.mockReturnValue({
      channels: {
        telegram: { dmPolicy: "open", allowFrom: ["*"] },
      },
    });
    loadWebMedia.mockReset();
    sendAnimationSpy.mockReset();
    sendPhotoSpy.mockReset();
    setMessageReactionSpy.mockReset();
    answerCallbackQuerySpy.mockReset();
    setMyCommandsSpy.mockReset();
    middlewareUseSpy.mockReset();
    sequentializeSpy.mockReset();
    botCtorSpy.mockReset();
    _sequentializeKey = undefined;
  });

  // groupPolicy tests

  it("blocks @username allowFrom entries when groupPolicy is 'allowlist' (numeric IDs required)", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          groupPolicy: "allowlist",
          allowFrom: ["@TestUser"], // Uppercase in config
          groups: { "*": { requireMention: false } },
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: -100123456789, type: "group", title: "Test Group" },
        from: { id: 12345, username: "testuser" }, // Lowercase in message
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).toHaveBeenCalledTimes(0);
  });
  it("allows direct messages regardless of groupPolicy", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          groupPolicy: "disabled", // Even with disabled, DMs should work
          allowFrom: ["123456789"],
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: 123456789, type: "private" }, // Direct message
        from: { id: 123456789, username: "testuser" },
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).toHaveBeenCalledTimes(1);
  });
  it("allows direct messages with tg/Telegram-prefixed allowFrom entries", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          allowFrom: ["  TG:123456789  "],
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: 123456789, type: "private" }, // Direct message
        from: { id: 123456789, username: "testuser" },
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).toHaveBeenCalledTimes(1);
  });
  it("allows direct messages with telegram:-prefixed allowFrom entries", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          allowFrom: ["telegram:123456789"],
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: 123456789, type: "private" },
        from: { id: 123456789, username: "testuser" },
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).toHaveBeenCalledTimes(1);
  });
  it("allows group messages with wildcard in allowFrom when groupPolicy is 'allowlist'", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          groupPolicy: "allowlist",
          allowFrom: ["*"], // Wildcard allows everyone
          groups: { "*": { requireMention: false } },
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: -100123456789, type: "group", title: "Test Group" },
        from: { id: 999999, username: "random" }, // Random sender, but wildcard allows
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).toHaveBeenCalledTimes(1);
  });
  it("blocks group messages with no sender ID when groupPolicy is 'allowlist'", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          groupPolicy: "allowlist",
          allowFrom: ["123456789"],
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: -100123456789, type: "group", title: "Test Group" },
        // No `from` field (e.g., channel post or anonymous admin)
        text: "hello",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    expect(replySpy).not.toHaveBeenCalled();
  });
  it("matches telegram:-prefixed allowFrom entries in group allowlist", async () => {
    onSpy.mockReset();
    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
    replySpy.mockReset();
    loadConfig.mockReturnValue({
      channels: {
        telegram: {
          groupPolicy: "allowlist",
          allowFrom: ["telegram:123456789"], // Prefixed format
          groups: { "*": { requireMention: false } },
        },
      },
    });

    createTelegramBot({ token: "tok" });
    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;

    await handler({
      message: {
        chat: { id: -100123456789, type: "group", title: "Test Group" },
        from: { id: 123456789, username: "testuser" }, // Matches after stripping prefix
        text: "hello from prefixed user",
        date: 1736380800,
      },
      me: { username: "clawdbot_bot" },
      getFile: async () => ({ download: async () => new Uint8Array() }),
    });

    // Should call reply because sender ID matches after stripping telegram: prefix
    expect(replySpy).toHaveBeenCalled();
  });
});
