import jwt from "jsonwebtoken";
import { describe, expect, test } from "vite-plus/test";
import { extractCode, isTokenExpired, jwtExpiresAt } from "../src/util";

describe("extractCode", () => {
  test("extracts code from query when same origin + path", () => {
    const url = "https://app.example.com/cb?code=abc123&state=xyz";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("abc123");
  });

  test("extracts code from query with weird path", () => {
    const url = "https://app.example.com/cbwithextra?code=abc123&state=xyz";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBeNull();
  });

  test("allows trailing slash differences", () => {
    expect(extractCode("https://app.example.com/cb/?code=abc", "https://app.example.com/cb")).toBe(
      "abc",
    );
    expect(extractCode("https://app.example.com/cb?code=abc", "https://app.example.com/cb/")).toBe(
      "abc",
    );
  });

  test("treats default ports as equal (https:443, http:80)", () => {
    expect(
      extractCode("https://app.example.com/cb?code=abc", "https://app.example.com:443/cb"),
    ).toBe("abc");
    expect(extractCode("http://app.example.com/cb?code=abc", "http://app.example.com:80/cb")).toBe(
      "abc",
    );
  });

  test("rejects different port", () => {
    expect(
      extractCode("https://app.example.com/cb?code=abc", "https://app.example.com:8443/cb"),
    ).toBeNull();
  });

  test("rejects different hostname (including subdomain changes)", () => {
    expect(
      extractCode("https://evil.example.com/cb?code=abc", "https://app.example.com/cb"),
    ).toBeNull();
  });

  test("requires path to start with redirect path (ignoring query/hash)", () => {
    // same origin but wrong path -> null
    expect(
      extractCode("https://app.example.com/other?code=abc", "https://app.example.com/cb"),
    ).toBeNull();

    // deeper subpath under the redirect path -> allowed (prefix match)
    expect(
      extractCode("https://app.example.com/cb/deep?code=abc", "https://app.example.com/cb"),
    ).toBe("abc");
  });

  test("works with custom schemes", () => {
    expect(extractCode("myapp://cb?code=abc", "myapp://cb")).toBe("abc");
  });

  test("prefers query over fragment when both present", () => {
    const url = "https://app.example.com/cb?code=queryCode#code=hashCode";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("queryCode");
  });

  test("extracts code from fragment when query lacks code", () => {
    const url = "https://app.example.com/cb#code=fromHash&state=xyz";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("fromHash");
  });

  test("returns null if no code present (query or fragment)", () => {
    const url = "https://app.example.com/cb?state=only";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBeNull();
  });

  test("returns null when provider reports an error", () => {
    const url = "https://app.example.com/cb?error=access_denied&error_description=oopsy";
    const redirect = "https://app.example.com/cb";
    expect(() => extractCode(url, redirect)).toThrow("Failed to authorize: access_denied");
  });

  test("when redirectUri is null, extracts code from any URL", () => {
    expect(extractCode("https://random.example.com/whatever?code=abc", null)).toBe("abc");
  });

  test("handles extra params gracefully", () => {
    const url = "https://app.example.com/cb?foo=1&bar=2&code=abc&baz=3";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("abc");
  });

  test("ignores fragment noise when code is in query", () => {
    const url = "https://app.example.com/cb?code=abc#some=thing";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("abc");
  });

  // If you decide NOT to support fragment-based codes, flip these to expect null or mark as .skip
  test("supports fragment-only code for response_mode=fragment providers", () => {
    const url = "https://app.example.com/cb#state=xyz&code=abc";
    const redirect = "https://app.example.com/cb";
    expect(extractCode(url, redirect)).toBe("abc");
  });
});

describe("isTokenExpired", () => {
  const jwtWithExp = (expSecondsFromNow: number) =>
    jwt.sign({ exp: Math.floor(Date.now() / 1000) + expSecondsFromNow }, "test-secret");

  test("uses stored expiresAt when present", () => {
    expect(isTokenExpired({ response: { access_token: "x" }, expiresAt: Date.now() - 1000 })).toBe(
      true,
    );
    expect(isTokenExpired({ response: { access_token: "x" }, expiresAt: Date.now() + 10000 })).toBe(
      false,
    );
  });

  test("falls back to JWT exp claim when expiresAt is null", () => {
    expect(
      isTokenExpired({ response: { access_token: jwtWithExp(-60) }, expiresAt: null }),
    ).toBe(true);
    expect(
      isTokenExpired({ response: { access_token: jwtWithExp(60) }, expiresAt: null }),
    ).toBe(false);
  });

  test("treats opaque tokens without expiresAt as non-expiring", () => {
    expect(isTokenExpired({ response: { access_token: "opaque-token" }, expiresAt: null })).toBe(
      false,
    );
  });

  test("checks the token that is used as the credential", () => {
    // Expired id_token credential is not masked by an opaque access_token
    const token = {
      response: { access_token: "opaque-token", id_token: jwtWithExp(-60) },
      expiresAt: null,
    };
    expect(isTokenExpired(token, "id_token")).toBe(true);
    expect(isTokenExpired(token, "access_token")).toBe(false);
  });
});

describe("jwtExpiresAt", () => {
  test("extracts exp claim in milliseconds", () => {
    const exp = Math.floor(Date.now() / 1000) + 300;
    expect(jwtExpiresAt(jwt.sign({ exp }, "test-secret"))).toBe(exp * 1000);
  });

  test("returns null for non-JWT or missing tokens", () => {
    expect(jwtExpiresAt("not-a-jwt")).toBeNull();
    expect(jwtExpiresAt(undefined)).toBeNull();
    expect(jwtExpiresAt(jwt.sign({ foo: "bar" }, "test-secret"))).toBeNull();
  });
});