import type { GitLabClient } from './gitlab.classes.gitlabclient.js';
import type { IGitLabGroup, IListOptions, IVariableOptions } from './gitlab.interfaces.js';
import { GitLabProject } from './gitlab.classes.project.js';
import { GitLabVariable } from './gitlab.classes.variable.js';
import { autoPaginate } from './gitlab.helpers.js';

export class GitLabGroup {
  // Raw data
  public readonly id: number;
  public readonly name: string;
  public readonly fullPath: string;
  public readonly description: string;
  public readonly webUrl: string;
  public readonly visibility: string;

  /** @internal */
  constructor(
    private client: GitLabClient,
    raw: IGitLabGroup,
  ) {
    this.id = raw.id;
    this.name = raw.name || '';
    this.fullPath = raw.full_path || '';
    this.description = raw.description || '';
    this.webUrl = raw.web_url || '';
    this.visibility = raw.visibility || 'private';
  }

  // ---------------------------------------------------------------------------
  // Projects
  // ---------------------------------------------------------------------------

  async getProjects(opts?: IListOptions): Promise<GitLabProject[]> {
    return autoPaginate(
      (page, perPage) => this.client.requestGetGroupProjects(this.id, { ...opts, page, perPage }),
      opts,
    ).then(projects => projects.map(p => new GitLabProject(this.client, p)));
  }

  // ---------------------------------------------------------------------------
  // Descendant Groups
  // ---------------------------------------------------------------------------

  async getDescendantGroups(opts?: IListOptions): Promise<GitLabGroup[]> {
    return autoPaginate(
      (page, perPage) => this.client.requestGetDescendantGroups(this.id, { ...opts, page, perPage }),
      opts,
    ).then(groups => groups.map(g => new GitLabGroup(this.client, g)));
  }

  // ---------------------------------------------------------------------------
  // Variables (CI/CD)
  // ---------------------------------------------------------------------------

  async getVariables(): Promise<GitLabVariable[]> {
    const vars = await this.client.requestGetGroupVariables(this.id);
    return vars.map(v => new GitLabVariable(v));
  }

  async createVariable(key: string, value: string, opts?: IVariableOptions): Promise<GitLabVariable> {
    const raw = await this.client.requestCreateGroupVariable(this.id, key, value, opts);
    return new GitLabVariable(raw);
  }

  async updateVariable(key: string, value: string, opts?: IVariableOptions): Promise<GitLabVariable> {
    const raw = await this.client.requestUpdateGroupVariable(this.id, key, value, opts);
    return new GitLabVariable(raw);
  }

  async deleteVariable(key: string): Promise<void> {
    await this.client.requestDeleteGroupVariable(this.id, key);
  }

  // ---------------------------------------------------------------------------
  // Mutation
  // ---------------------------------------------------------------------------

  /**
   * Update group properties.
   */
  async update(data: {
    name?: string;
    path?: string;
    description?: string;
    visibility?: string;
  }): Promise<void> {
    await this.client.requestUpdateGroup(this.id, {
      name: data.name,
      path: data.path,
      description: data.description,
      visibility: data.visibility,
    });
  }

  /**
   * Upload an avatar image for this group (multipart FormData).
   */
  async setAvatar(imageData: Uint8Array, filename: string): Promise<void> {
    await this.client.requestSetGroupAvatar(this.id, imageData, filename);
  }

  /**
   * Remove the group's avatar.
   */
  async deleteAvatar(): Promise<void> {
    await this.client.requestUpdateGroup(this.id, { avatar: '' });
  }

  /**
   * Transfer this group to be a child of another group.
   */
  async transfer(parentGroupId: number): Promise<void> {
    await this.client.requestTransferGroup(this.id, parentGroupId);
  }

  /**
   * Delete this group.
   */
  async delete(): Promise<void> {
    await this.client.requestDeleteGroup(this.id);
  }

  // ---------------------------------------------------------------------------
  // Serialization
  // ---------------------------------------------------------------------------

  toJSON(): IGitLabGroup {
    return {
      id: this.id,
      name: this.name,
      full_path: this.fullPath,
      description: this.description,
      web_url: this.webUrl,
      visibility: this.visibility,
    };
  }
}