/*
 *  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 { VendorManager, VENDOR_TYPE, Vendor, RepoManager } from '../../types';
import { GHQuery } from './api-types';
import GitHubRepoManager from './repomgr';

export interface GitHubConfig {
  token: string;
  domain?: string | null;
}

export default class GitHubVendorManager implements VendorManager<GitHubConfig> {
  vendor: Vendor;
  config: GitHubConfig;
  gqlEndpoint: string;

  constructor(config: GitHubConfig) {
    this.vendor = {
      display:
        config.domain && config.domain !== 'github.com'
          ? `Github Enterprise @ ${config.domain}`
          : 'Microsoft GitHub',
      type: VENDOR_TYPE.GITHUB,
      domain: config.domain || 'github.com',
    };
    this.config = config;
    this.gqlEndpoint = `https://${
      this.vendor.domain === 'github.com'
        ? 'api.github.com'
        : /* github enterprise server */ `${this.vendor.domain}/api`
    }/graphql`;
  }

  public async initialize() {
    return this;
  }

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

  /** internal and for RepoManager */
  public async _doRequest<T = GHQuery, D = any>(query: string, variables: D) {
    return got
      .post(this.gqlEndpoint, {
        body: JSON.stringify({ query, variables }),
        headers: { Authorization: `Bearer ${this.config.token}` },
      })
      .then((res) => JSON.parse(res.body))
      .then((res) => res.data) as Promise<T>;
  }

  /** used to provide diff/patch contents */
  public async _http_get(url: string | URL): Promise<string> {
    return got
      .get(url, {
        headers: {
          Authorization: `Bearer ${this.config.token}`,
        },
      })
      .then((res) => res.body);
  }
}