interface TokenResponse {
  access_token: string;
  token_type: string;
  expires_in: number;
  refresh_token: string;
}

interface GiteaUser {
  id: number;
  login: string;
  login_name: string;
  source_id: number;
  full_name: string;
  email: string;
  avatar_url: string;
  html_url: string;
  language: string;
  is_admin: boolean;
  last_login: string;
  created: string;
  restricted: boolean;
  active: boolean;
  prohibit_login: boolean;
  location: string;
  website: string;
  description: string;
  visibility: string;
  followers_count: number;
  following_count: number;
  starred_repos_count: number;
  username: string;
}

class Gitea {
  private get config() {
    return {
      giteaUrl: process.env.GITEA_URL!,
      clientId: process.env.GITEA_CLIENT_ID!,
      clientSecret: process.env.GITEA_CLIENT_SECRET!,
      redirectUri: process.env.GITEA_REDIRECT_URI!,
    }
  }

  async getToken(code: string) {
    const { giteaUrl, clientId, clientSecret, redirectUri } = this.config;
    console.log('this.config', this.config);
    const response = await fetch(
      `${giteaUrl}/login/oauth/access_token`,
      {
        method: 'POST',
        headers: this.getHeaders(),
        body: JSON.stringify({
          client_id: clientId,
          client_secret: clientSecret,
          code,
          grant_type: 'authorization_code',
          redirect_uri: redirectUri,
        }),
      },
    );
    if (!response.ok) {
      console.log(await response.json());
      throw new Error(`Fetch failed: ${response.status}`);
    }
    return (await response.json()) as TokenResponse;
  }
  /**
   * 获取用户信息
   * @param accessToken 访问令牌
   */
  async getUserInfo(accessToken: string) {
    const response = await fetch(`${this.config.giteaUrl}/api/v1/user`, {
      method: 'GET',
      headers: this.getHeaders(accessToken),
    });
    if (!response.ok) {
      throw new Error(`Fetch failed: ${response.status}`);
    }
    const result = (await response.json()) as GiteaUser;
    return result;
  }

  private getHeaders(accessToken?: string) {
    const headers: Record<string, string> = {
      'Content-Type': 'application/json',
    };
    if (accessToken) {
      headers['Authorization'] = `token ${accessToken}`;
    }
    return headers;
  }
}

export const gitea = new Gitea();