/*
 *  Copycat. Copyright (C) 2020 selfisekai <laura@selfisekai.rocks> and other contributors.
 *
 *  This is free software, and you are welcome to redistribute it
 *  under the GNU General Public License 3.0 or later; see the LICENSE file for details,
 *  or, if the file is unavailable, visit <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
 */

import got from 'got';
import qs from 'querystring';
import { VendorManager, VENDOR_TYPE, Vendor, RepoManager } from '../../types';
import { GLQuery } from './api-types';
import GitLabRepoManager from './repomgr';

export interface GitLabConfig {
  /** not required for read actions on public repos */
  token?: string | null;
  domain: string;
}

export default class GitLabVendorManager implements VendorManager<GitLabConfig> {
  vendor: Vendor;
  config: GitLabConfig;
  apiEndpoint: string;
  v4Endpoint: string;
  gqlEndpoint: string;

  constructor(config: GitLabConfig) {
    this.vendor = {
      display: `GitLab @ ${config.domain}`,
      type: VENDOR_TYPE.GITLAB,
      domain: config.domain,
    };
    this.config = config;
    this.apiEndpoint = `https://${this.vendor.domain}/api`;
    this.v4Endpoint = `${this.apiEndpoint}/v4`;
    this.gqlEndpoint = `${this.apiEndpoint}/graphql`;
  }

  public async initialize() {
    return this;
  }

  public async getRepo(path: string) {
    return new GitLabRepoManager(this, path).initialize() as Promise<RepoManager>;
  }

  /** internal and for RepoManager */
  public async _doRequest_gql<T = GLQuery, D = any>(query: string, variables: D) {
    return got
      .post(this.gqlEndpoint, {
        body: JSON.stringify({ query, variables }),
        headers: {
          Authorization: `Bearer ${this.config.token}`,
          'Content-Type': 'application/json',
        },
      })
      .then((res) => JSON.parse(res.body))
      .then((res) => res.data) as Promise<T>;
  }

  /** internal and for RepoManager */
  public async _doRequest_v4<T = any>(method: 'GET' | 'POST', path: string, query?: any) {
    // did you know that gitlab graphql api is fucked up
    // and does not support some of the core functionality like creating issues?
    return got(`${this.v4Endpoint}/${path}?${qs.stringify(query)}`, {
      method,
      headers: {
        Authorization: `Bearer ${this.config.token}`,
      },
    }).then((res) => JSON.parse(res.body) as T);
  }
}