import { API_BASE_URL } from '../config/api';

class ApiService {
  constructor() {
    this.baseURL = API_BASE_URL;
    this.isAvailable = true;
  }

  async request(endpoint, options = {}) {
    try {
      const response = await fetch(`${this.baseURL}${endpoint}`, {
        ...options,
        headers: {
          'Content-Type': 'application/json',
          ...options.headers,
        },
      });

      this.isAvailable = true;

      if (!response.ok) {
        const error = await response.json();
        throw new Error(error.message || 'Request failed');
      }

      if (response.status === 204) {
        return null;
      }

      return await response.json();
    } catch (error) {
      if (error.name === 'TypeError' || error.message.includes('fetch')) {
        this.isAvailable = false;
      }
      throw error;
    }
  }

  // Posts endpoints
  async getPosts() {
    return this.request('/api/posts');
  }

  async createPost(data) {
    return this.request('/api/posts', {
      method: 'POST',
      body: JSON.stringify(data),
    });
  }

  async getPostById(postId) {
    return this.request(`/api/posts/${postId}`);
  }

  async updatePost(postId, data) {
    return this.request(`/api/posts/${postId}`, {
      method: 'PATCH',
      body: JSON.stringify(data),
    });
  }

  async deletePost(postId) {
    return this.request(`/api/posts/${postId}`, {
      method: 'DELETE',
    });
  }

  // Comments endpoints
  async getCommentsByPostId(postId) {
    return this.request(`/api/posts/${postId}/comments`);
  }

  async createComment(postId, data) {
    return this.request(`/api/posts/${postId}/comments`, {
      method: 'POST',
      body: JSON.stringify(data),
    });
  }

  async getCommentById(postId, commentId) {
    return this.request(`/api/posts/${postId}/comments/${commentId}`);
  }

  async updateComment(postId, commentId, data) {
    return this.request(`/api/posts/${postId}/comments/${commentId}`, {
      method: 'PATCH',
      body: JSON.stringify(data),
    });
  }

  async deleteComment(postId, commentId) {
    return this.request(`/api/posts/${postId}/comments/${commentId}`, {
      method: 'DELETE',
    });
  }

  // Likes endpoints
  async likePost(postId, data) {
    return this.request(`/api/posts/${postId}/likes`, {
      method: 'POST',
      body: JSON.stringify(data),
    });
  }

  async unlikePost(postId, data) {
    return this.request(`/api/posts/${postId}/likes`, {
      method: 'DELETE',
      body: JSON.stringify(data),
    });
  }

  getAvailability() {
    return this.isAvailable;
  }
}

export const apiService = new ApiService();