const { test, expect, describe } = require('bun:test');
const { basePathOf, underBasePath, requestUri } = require('./base-path');

describe('basePathOf — the path the backend is served under', () => {
  test('a backend owning its origin is served at the root, with or without a trailing slash', () => {
    expect(basePathOf('http://localhost:3003')).toBe('/');
    expect(basePathOf('http://localhost:3003/')).toBe('/');
  });

  test('a backend sharing the front end origin is served under its path, always ending with a slash', () => {
    expect(basePathOf('https://festipod.dev.reconnexion.coop/api/')).toBe('/api/');
    expect(basePathOf('https://festipod.dev.reconnexion.coop/api')).toBe('/api/');
  });

  test('an unset base URL reads as the root', () => {
    expect(basePathOf(undefined)).toBe('/');
    expect(basePathOf('')).toBe('/');
  });
});

describe('underBasePath — where a route is mounted', () => {
  test('at the root, a route keeps its path', () => {
    expect(underBasePath('/', '/catalog')).toBe('/catalog');
    expect(underBasePath('/', '/as/actor/app')).toBe('/as/actor/app');
  });

  test('under a base path, a route is prefixed by it, without a doubled slash', () => {
    expect(underBasePath('/api/', '/catalog')).toBe('/api/catalog');
    expect(underBasePath('/api/', 'as/actor/app')).toBe('/api/as/actor/app');
  });
});

describe('requestUri — the URI a request was made to', () => {
  test('at the root, the request path is appended to the origin', () => {
    expect(requestUri('http://localhost:3003', '/as/actor/app')).toBe('http://localhost:3003/as/actor/app');
    expect(requestUri('http://localhost:3003/', '/app')).toBe('http://localhost:3003/app');
  });

  test('under a base path, the raw request path already carries it and is not prefixed twice', () => {
    expect(requestUri('https://festipod.dev.reconnexion.coop/api/', '/api/as/actor/app')).toBe(
      'https://festipod.dev.reconnexion.coop/api/as/actor/app'
    );
    expect(requestUri('https://festipod.dev.reconnexion.coop/api', '/api/app')).toBe(
      'https://festipod.dev.reconnexion.coop/api/app'
    );
  });

  test('the base URL is kept exactly as written — the same URI the backend mints its actor under', () => {
    const urlJoin = require('url-join');
    for (const baseUrl of ['http://localhost:80', 'https://Festipod.Example/api/', 'https://host:443/api']) {
      const path = `${basePathOf(baseUrl)}as/actor/app`;
      expect(requestUri(baseUrl, path)).toBe(urlJoin(baseUrl, 'as/actor/app'));
    }
  });
});