import { default as Axios, AxiosInstance } from 'axios';
import assign from 'lodash.assign';
import { ApiToken, LoginSubmit, Measure, MeasureConfig, Measurement, MeasurementMeta, User } from '@/models';
import { Logger, logService } from '@/services/logging';

const logger = logService.getLogger('services/pm-api-client');

export class PmApiClient {
  private http: AxiosInstance;

  constructor(apiBase: string) {
    this.http = Axios.create({
      baseURL: apiBase
      /*
      headers: {
        post: {
          'Content-Type': 'application/json'
        }
      }
      */
    });

    logger.trace('Initialized PmApiClient');
  }

  public setAuthToken(authToken: string) {
    /*tslint:disable:no-string-literal*/
    this.http.defaults.headers.common['Authorization'] = `Bearer ${authToken}`;
  }

  public clearAuthToken() {
    this.http.defaults.headers.common['Authorization'] = '';
  }

  public async version(): Promise<string> {
    const resp = await this.http.get('/version');
    return resp.data;
  }

  public async createAuthToken(creds: LoginSubmit)
    : Promise<string> {

    const resp = await this.http.post('/auth-token', creds);
    this.setAuthToken(resp.data);
    return resp.data;
  }

  public async getUser(): Promise<User> {
    const resp = await this.http.get('/user');
    return resp.data;
  }

  public async getAllUsers(): Promise<User[]> {
    const resp = await this.http.get('/users');
    return resp.data;
  }

  public async getUserById(reqUserId: string): Promise<User> {
    const resp = await this.http.get(`/users/${reqUserId}`);
    return resp.data;
  }

  public async createUser(newUser: User): Promise<User> {
    const resp = await this.http.post('/users', newUser);
    return resp.data;
  }

  public async deleteUser(toDeleteUserId: string)
    : Promise<boolean> {

    await this.http.delete(`/users/${toDeleteUserId}`);
    return true;
  }

  public async changePwd(oldPassword: string, newPassword: string)
    : Promise<boolean> {

    await this.http.post('/change-pwd', { oldPassword, newPassword });
    return true;
  }

  public async changePwdForUser(forUserId: string, newPassword: string)
    : Promise<boolean> {

    await this.http.post(`/change-pwd/${forUserId}`, { newPassword });
    return true;
  }

  public async createApiToken(token: ApiToken)
    : Promise<ApiToken[]> {

    const resp = await this.http.post(`/api-tokens`, token);
    return resp.data;
  }

  public async getAllApiTokens(): Promise<ApiToken[]> {
    const resp = await this.http.get('/api-tokens');
    return resp.data;
  }

  public async getApiToken(tokenId: string): Promise<ApiToken[]> {
    const resp = await this.http.get(`/api-tokens/${tokenId}`);
    return resp.data;
  }

  public async deleteApiToken(tokenId: string): Promise<boolean> {
    const resp = await this.http.delete(`/api-tokens/${tokenId}`);
    return true;
  }

  public async getAllMeasures(): Promise<Array<Measure<MeasureConfig>>> {
    const resp = await this.http.get(`/measures`);
    return resp.data;
  }

  public async createMeasure<T extends MeasureConfig>(measure: Measure<T>): Promise<Measure<T>> {
    const resp = await this.http.post(`/measures`, measure);
    return resp.data;
  }

  public async getMeasure(slug: string): Promise<Measure<MeasureConfig>> {
    const resp = await this.http.get(`/measures/${slug}`);
    return resp.data;
  }

  public async updateMeasure<T extends MeasureConfig>(measure: Measure<T>): Promise<Measure<T>> {
    const resp = await this.http.post(`/measures/${measure.slug}`, measure);
    return resp.data;
  }

  public async deleteMeasure(slug: string): Promise<boolean> {
    const resp = await this.http.delete(`/measures/${slug}`);
    return true;
  }

  public async getMeasurements(measureSlug: string)
    : Promise<Array<Measurement<MeasurementMeta>>> {

    const resp = await this.http.get(`/measurements/${measureSlug}`);
    return resp.data.map(this.fromMeasurementDTO);
  }

  public async createMeasurement(
      measureSlug: string,
      measurement: Measurement<MeasurementMeta>)
    : Promise<Measurement<MeasurementMeta>> {

     const resp = await this.http.post(
       `/measurements/${measureSlug}`,
       this.toMeasurementDTO(measurement));
     return this.fromMeasurementDTO(resp.data);
  }

  public async getMeasurement(
      measureSlug: string,
      measurementId: string)
    : Promise<Measurement<MeasurementMeta>> {

    const resp = await this.http
      .get(`/measurements/${measureSlug}/${measurementId}`);
    return this.fromMeasurementDTO(resp.data);
  }

  public async updateMeasurement(
      measureSlug: string,
      measurement: Measurement<MeasurementMeta>)
    : Promise<Measurement<MeasurementMeta>> {

    const resp = await this.http.put(
      `/measurements/${measureSlug}/${measurement.id}`,
      this.toMeasurementDTO(measurement));
    return this.fromMeasurementDTO(resp.data);
  }

  public async deleteMeasurement(
      measureSlug: string,
      measurementId: string)
    : Promise<boolean> {

    const resp = await this.http
      .delete(`/measurements/${measureSlug}/${measurementId}`);
    return true;
  }

  private fromMeasurementDTO(dto: any): Measurement<MeasurementMeta> {
    return assign({}, dto, { timestamp: new Date(dto.timestamp) });
  }

  private toMeasurementDTO(measurement: Measurement<MeasurementMeta>): object {
    return assign({}, measurement, { timestamp: measurement.timestamp.toISOString() });
  }

}

export const api = new PmApiClient(process.env.VUE_APP_PM_API_BASE);
export default api;