import supertest from 'supertest';
import should from 'should/as-function';
import db from "../db";


export default class TestHelper {
  public static auth = {
    admin: {pass: 'Abc123!#', key: '000000000000000000001003'},
    janedoe: {pass: 'Xyz890*)', key: '000000000000000000001002'},
    user: {pass: 'Xyz890*)', key: '000000000000000000001001'}
  }
  public static res = {
    400: {status: 'Bad request'},
    401: {status: 'Unauthorized'},
    403: {status: 'Forbidden'},
    404: {status: 'Not found'},
  }

  static before (done) {
    process.env.port = '2999';
    process.env.NODE_ENV = 'test';
    db.connect('test', done);
  }

  static beforeEach (server, done) {
    delete require.cache[require.resolve('../index')];  // prevent loading from cache
    server = require('../index');
    db.drop(err => {  // reset database
      if (err) return done(err);
      db.loadJson(require('../test/db.json'), done);
    });
    return server
  }

  static afterEach (server, done) {
    server.close(done);
  }

  static request (server, done, options) {  // options in form: {method, url, auth: {key/basic: 'name' or 'key'/{name, pass}}, httpStatus, req, res}
    let st = supertest(server);
    if (options.hasOwnProperty('auth') && options.auth.hasOwnProperty('key')) {
      options.url += '?key=' + (this.auth.hasOwnProperty(options.auth.key)? this.auth[options.auth.key].key : options.auth.key);
    }
    switch (options.method) {
      case 'get':
        st = st.get(options.url)
        break;
      case 'post':
        st = st.post(options.url)
        break;
      case 'put':
        st = st.put(options.url)
        break;
      case 'delete':
        st = st.delete(options.url)
        break;
    }
    if (options.hasOwnProperty('req')) {
      st = st.send(options.req);
    }
    if (options.hasOwnProperty('auth') && options.auth.hasOwnProperty('basic')) {
      if (this.auth.hasOwnProperty(options.auth.basic)) {
        st = st.auth(options.auth.basic, this.auth[options.auth.basic].pass)
      }
      else {
        st = st.auth(options.auth.basic.name, options.auth.basic.pass)
      }
    }
    st = st.expect('Content-type', /json/)
      .expect(options.httpStatus);
    if (options.hasOwnProperty('res')) {
      return st.end((err, res) => {
        if (err) return done (err);
        should(res.body).be.eql(options.res);
        done();
      });
    }
    else if (this.res.hasOwnProperty(options.httpStatus) && options.default !== false) {
      return st.end((err, res) => {
        if (err) return done (err);
        should(res.body).be.eql(this.res[options.httpStatus]);
        done();
      });
    }
    else {
      return st;
    }
  }
}