export class GiteaUnauthorizedError extends Error {
  constructor(...args: any[]) {
    super(...args)
    Object.setPrototypeOf(this, GiteaUnauthorizedError.prototype);
  }
}

export class GiteaClient {

  fetchIssues(project: any, page = 1) {
    return fetch(`/gitea/api/v1/repos/${project}/issues?page=${page}`)
      .then(this.assertAuthorization)
      .then(this.assertOk)
      .then(res => res.json())
    ;
  }

  fetchUserProjects(page = 1) {
    return fetch(`/gitea/api/v1/user/repos?page=${page}`)
      .then(this.assertAuthorization)
      .then(this.assertOk)
      .then(res => res.json())
    ;
  }

  addIssueLabel(project: any, issueNumber: any, labelID: any) {
    return fetch(`/gitea/api/v1/repos/${project}/issues/${issueNumber}/labels`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ labels: [labelID] }),
    })
    .then(this.assertAuthorization)
    .then(this.assertOk)
    .then(res => res.json())
  }

  fetchProjectLabels(project: any) {
    return fetch(`/gitea/api/v1/repos/${project}/labels`)
      .then(this.assertAuthorization)
      .then(this.assertOk)
      .then(res => res.json())
    ;
  }

  removeIssueLabel(project: any, issueNumber: any, labelID: any) {
    return fetch(`/gitea/api/v1/repos/${project}/issues/${issueNumber}/labels/${labelID}`, {
      method: 'DELETE'
    })
    .then(this.assertAuthorization)
    .then(this.assertOk)
  }

  createIssue(project: any, title: any, body: any, labelID: any) {
    return fetch(`/gitea/api/v1/repos/${project}/issues`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        title,
        body,
        labels: labelID ? [labelID] : undefined,
      }),
    })
    .then(this.assertAuthorization)
    .then(this.assertOk)
    .then(res => res.json())
  }

  assertOk(res: any) {
    if (!res.ok) return Promise.reject(new Error('Request failed'));
    return res;
  }

  assertAuthorization(res: any) {
    if (res.status === 401 || res.status === 404) return Promise.reject(new GiteaUnauthorizedError());
    return res;
  }

}

export const gitea = new GiteaClient();