/**
 * Gogs API Client
 * Provides methods to interact with a Gogs server REST API
 */

import axios, { AxiosInstance } from 'axios';
import type {
  GogsUser,
  GogsRepository,
  GogsSearchResponse,
  GogsFileContent,
  GogsBranch,
  GogsCommit,
  GogsConfig,
} from './types.js';

export class GogsClient {
  private client: AxiosInstance;
  private serverUrl: string;

  constructor(config: GogsConfig) {
    this.serverUrl = config.serverUrl.replace(/\/$/, '');

    this.client = axios.create({
      baseURL: `${this.serverUrl}/api/v1`,
      headers: {
        'Content-Type': 'application/json',
        ...(config.accessToken && { Authorization: `token ${config.accessToken}` }),
      },
    });
  }

  /**
   * Get information about the authenticated user
   */
  async getCurrentUser(): Promise<GogsUser> {
    const response = await this.client.get<GogsUser>('/user');
    return response.data;
  }

  /**
   * Get information about a specific user
   */
  async getUser(username: string): Promise<GogsUser> {
    const response = await this.client.get<GogsUser>(`/users/${username}`);
    return response.data;
  }

  /**
   * Search for users
   */
  async searchUsers(query: string, limit: number = 10): Promise<GogsUser[]> {
    const response = await this.client.get<GogsSearchResponse<GogsUser>>('/users/search', {
      params: { q: query, limit },
    });
    return response.data.data;
  }

  /**
   * List repositories for the authenticated user
   */
  async listMyRepositories(): Promise<GogsRepository[]> {
    const response = await this.client.get<GogsRepository[]>('/user/repos');
    return response.data;
  }

  /**
   * List repositories for a specific user
   */
  async listUserRepositories(username: string): Promise<GogsRepository[]> {
    const response = await this.client.get<GogsRepository[]>(`/users/${username}/repos`);
    return response.data;
  }

  /**
   * Search for repositories
   */
  async searchRepositories(
    query: string,
    options?: { uid?: number; limit?: number; page?: number }
  ): Promise<GogsRepository[]> {
    const response = await this.client.get<GogsSearchResponse<GogsRepository>>('/repos/search', {
      params: {
        q: query,
        uid: options?.uid || 0,
        limit: options?.limit || 10,
        page: options?.page || 1,
      },
    });
    return response.data.data;
  }

  /**
   * Get information about a specific repository
   */
  async getRepository(owner: string, repo: string): Promise<GogsRepository> {
    const response = await this.client.get<GogsRepository>(`/repos/${owner}/${repo}`);
    return response.data;
  }

  /**
   * Create a new repository
   */
  async createRepository(data: {
    name: string;
    description?: string;
    private?: boolean;
    auto_init?: boolean;
    gitignores?: string;
    license?: string;
    readme?: string;
  }): Promise<GogsRepository> {
    const response = await this.client.post<GogsRepository>('/user/repos', data);
    return response.data;
  }

  /**
   * Delete a repository
   */
  async deleteRepository(owner: string, repo: string): Promise<void> {
    await this.client.delete(`/repos/${owner}/${repo}`);
  }

  /**
   * Get file or directory contents
   */
  async getContents(
    owner: string,
    repo: string,
    path: string,
    ref?: string
  ): Promise<GogsFileContent | GogsFileContent[]> {
    const response = await this.client.get<GogsFileContent | GogsFileContent[]>(
      `/repos/${owner}/${repo}/contents/${path}`,
      {
        params: ref ? { ref } : undefined,
      }
    );
    return response.data;
  }

  /**
   * Get raw file content
   */
  async getRawContent(owner: string, repo: string, ref: string, path: string): Promise<string> {
    const response = await this.client.get<string>(
      `/repos/${owner}/${repo}/raw/${ref}/${path}`,
      {
        responseType: 'text',
      }
    );
    return response.data;
  }

  /**
   * List branches in a repository
   */
  async listBranches(owner: string, repo: string): Promise<GogsBranch[]> {
    const response = await this.client.get<GogsBranch[]>(`/repos/${owner}/${repo}/branches`);
    return response.data;
  }

  /**
   * Get commits from a repository
   */
  async getCommits(
    owner: string,
    repo: string,
    options?: { sha?: string; page?: number }
  ): Promise<GogsCommit[]> {
    const response = await this.client.get<GogsCommit[]>(`/repos/${owner}/${repo}/commits`, {
      params: {
        sha: options?.sha,
        page: options?.page || 1,
      },
    });
    return response.data;
  }
}