import uuidv4 from 'uuid/v4';

export async function createUser(
  server: ChaiHttp.Agent,
  user?: { display_name?: string; email: string; password: string },
) {
  const res = await server
    .post('/signup')
    .type('form')
    .send(user ? user : {email: `${uuidv4()}@example.com`, password: uuidv4()});
  if (res.status !== 201) {
    throw new Error(`When creating user got response ${res.status} with body ${res.text}`);
  }
  return res;
}

export async function clearUsers(server: ChaiHttp.Agent) {
  const resUsers = await server.get('/v1/users');
  const resDel = resUsers.body.users.map((user: { id: string }) =>
    server.del(`/v1/users/${user.id}`),
  );
  return Promise.all(resDel);
}

export async function authorize(server: ChaiHttp.Agent, scopes?: string[]) {
  const res = await server
    .get(`/authorize`)
    .query({
      client_id: '1',
      redirect_uri: encodeURIComponent('http://localhost:3000/'),
      response_type: 'token',
      scope: scopes ? encodeURIComponent(scopes.join(' ')) : undefined,
    })
    .redirects(0);

  const tokenType = fromRedirectHash(res.header.location, 'token_type');
  const accessToken = fromRedirectHash(res.header.location, 'access_token');
  return `${tokenType} ${accessToken}`;
}

export function fromRedirectHash(location: string, name: string) {
  const match = RegExp('[#&]' + name + '=([^&]*)').exec(location);
  return match ? decodeURIComponent(match[1].replace(/\+/g, ' ')) : undefined;
}