/**
 * Unit tests for auth: getTgWebAppDataFromHash, getInitData, isLocalhost.
 */

import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import {
  getTgWebAppDataFromHash,
  getInitData,
  isLocalhost,
  hasTelegramHashButNoInitData,
} from "./auth.js";

describe("getTgWebAppDataFromHash", () => {
  it("returns empty string when tgWebAppData= not present", () => {
    expect(getTgWebAppDataFromHash("foo=bar")).toBe("");
  });

  it("returns value from tgWebAppData= to next &tgWebApp or end", () => {
    expect(getTgWebAppDataFromHash("tgWebAppData=encoded%3Ddata")).toBe(
      "encoded=data"
    );
  });

  it("stops at &tgWebApp", () => {
    const hash = "tgWebAppData=value&tgWebAppVersion=6";
    expect(getTgWebAppDataFromHash(hash)).toBe("value");
  });

  it("decodes URI component", () => {
    expect(getTgWebAppDataFromHash("tgWebAppData=hello%20world")).toBe(
      "hello world"
    );
  });
});

describe("getInitData", () => {
  const origLocation = window.location;
  const origTelegram = window.Telegram;

  afterEach(() => {
    window.location = origLocation;
    window.Telegram = origTelegram;
  });

  it("returns initData from Telegram.WebApp when set", () => {
    window.Telegram = { WebApp: { initData: "sdk-init-data" } };
    delete window.location;
    window.location = { ...origLocation, hash: "", search: "" };
    expect(getInitData()).toBe("sdk-init-data");
  });

  it("returns data from hash tgWebAppData when SDK empty", () => {
    window.Telegram = { WebApp: { initData: "" } };
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#tgWebAppData=hash%20data",
      search: "",
    };
    expect(getInitData()).toBe("hash data");
  });

  it("returns empty string when no source", () => {
    window.Telegram = { WebApp: { initData: "" } };
    delete window.location;
    window.location = { ...origLocation, hash: "", search: "" };
    expect(getInitData()).toBe("");
  });

  it("returns data from hash query param without double-decoding", () => {
    window.Telegram = { WebApp: { initData: "" } };
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#tgWebAppVersion=6&tgWebAppData=user%3Dname%26hash%3Dabc",
      search: "",
    };
    expect(getInitData()).toBe("user=name&hash=abc");
  });

  it("returns data from search query param without double-decoding", () => {
    window.Telegram = { WebApp: { initData: "" } };
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "",
      search: "?tgWebAppData=user%3Dname%26hash%3Dabc",
    };
    expect(getInitData()).toBe("user=name&hash=abc");
  });
});

describe("isLocalhost", () => {
  const origLocation = window.location;

  afterEach(() => {
    window.location = origLocation;
  });

  it("returns true for localhost", () => {
    delete window.location;
    window.location = { ...origLocation, hostname: "localhost" };
    expect(isLocalhost()).toBe(true);
  });

  it("returns true for 127.0.0.1", () => {
    delete window.location;
    window.location = { ...origLocation, hostname: "127.0.0.1" };
    expect(isLocalhost()).toBe(true);
  });

  it("returns true for empty hostname", () => {
    delete window.location;
    window.location = { ...origLocation, hostname: "" };
    expect(isLocalhost()).toBe(true);
  });

  it("returns false for other hostnames", () => {
    delete window.location;
    window.location = { ...origLocation, hostname: "example.com" };
    expect(isLocalhost()).toBe(false);
  });
});

describe("hasTelegramHashButNoInitData", () => {
  const origLocation = window.location;

  afterEach(() => {
    window.location = origLocation;
  });

  it("returns false when hash is empty", () => {
    delete window.location;
    window.location = { ...origLocation, hash: "", search: "" };
    expect(hasTelegramHashButNoInitData()).toBe(false);
  });

  it("returns true when hash has tgWebAppVersion but no tgWebAppData", () => {
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#tgWebAppVersion=6",
      search: "",
    };
    expect(hasTelegramHashButNoInitData()).toBe(true);
  });

  it("returns false when hash has both tgWebAppVersion and tgWebAppData", () => {
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#tgWebAppVersion=6&tgWebAppData=some%3Ddata",
      search: "",
    };
    expect(hasTelegramHashButNoInitData()).toBe(false);
  });

  it("returns false when hash has tgWebAppData in unencoded form (with & and =)", () => {
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#tgWebAppData=value&tgWebAppVersion=6",
      search: "",
    };
    expect(hasTelegramHashButNoInitData()).toBe(false);
  });

  it("returns false when hash has no Telegram params", () => {
    delete window.location;
    window.location = {
      ...origLocation,
      hash: "#other=param",
      search: "",
    };
    expect(hasTelegramHashButNoInitData()).toBe(false);
  });
});