frontend/src/lib/LoadBalancer.js

class LoadBalancerAPI {
  constructor(baseURL) {
    this.baseURL = baseURL;
    this.filmCache = null; // Cache for film store
    this.tvCache = null;   // Cache for TV store
  }

  async getInstances() {
    return this._getRequest('/api/get/instances');
  }

  async getInstancesHealth() {
    return this._getRequest('/api/get/instances/health');
  }

  async getMovieByTitle(title) {
    return this._getRequest(`/api/get/movie/${encodeURIComponent(title)}`);
  }

  async getSeriesEpisode(title, season, episode) {
    return this._getRequest(`/api/get/series/${encodeURIComponent(title)}/${season}/${episode}`);
  }

  async getSeriesStore() {
    const response = await this._getRequest('/api/get/series/store');
    
    if (response && Object.keys(response).length > 0) {
      this.tvCache = response; // Update cache if response is not empty
    }
    
    return this.tvCache || {}; // Return cache if response is empty
  }

  async getMovieStore() {
    const response = await this._getRequest('/api/get/movie/store');
    
    if (response && Object.keys(response).length > 0) {
      this.filmCache = response; // Update cache if response is not empty
    }
    
    return this.filmCache || {}; // Return cache if response is empty
  }

  async getMovieMetadataByTitle(title) {
    return this._getRequest(`/api/get/movie/metadata/${encodeURIComponent(title)}`);
  }

  async getMovieCard(title) {
    return this._getRequest(`/api/get/movie/card/${encodeURIComponent(title)}`);
  }

  async getSeriesMetadataByTitle(title) {
    return this._getRequest(`/api/get/series/metadata/${encodeURIComponent(title)}`);
  }

  async getSeriesCard(title) {
    return this._getRequest(`/api/get/series/card/${encodeURIComponent(title)}`);
  }

  async getSeasonMetadataBySeriesId(series_id, season) {
    return this._getRequest(`/api/get/series/metadata/${series_id}/${season}`);
  }

  async getAllMovies() {
    return this._getRequest('/api/get/movie/all');
  }

  async getAllSeriesShows() {
    return this._getRequest('/api/get/series/all');
  }

  async getRecent() {
    return this._getRequest('/api/get/recent');
  }

  async getGenreItems(genres, mediaType = null, limit = 5) {
    // Create a new URLSearchParams object
    const queryParams = new URLSearchParams();

    // Append each genre to the query parameters
    genres.forEach(genre => queryParams.append('genre', genre));
    
    // Append the limit parameter
    queryParams.append('limit', limit);
    
    // Conditionally append the media_type parameter
    if (mediaType) {
        queryParams.append('media_type', mediaType);
    }
    
    // Make the GET request with the query parameters
    return this._getRequest(`/api/get/genre?${queryParams.toString()}`);
}

  async getDownloadProgress(url) {
    return this._getRequestNoBase(url);
  }

  // Helper methods for GET and POST requests
  async _getRequest(endpoint) {
    try {
      const response = await fetch(`${this.baseURL}${endpoint}`, {
        method: 'GET',
        headers: { 'Content-Type': 'application/json' },
      });
      console.log(`api endpoint: ${this.baseURL}${endpoint}`);
      return await this._handleResponse(response);
    } catch (error) {
      console.error(`Error during GET request to ${endpoint}:`, error);
      throw error;
    }
  }

  async _postRequest(endpoint, body) {
    try {
      const response = await fetch(`${this.baseURL}${endpoint}`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
      });
      return await this._handleResponse(response);
    } catch (error) {
      console.error(`Error during POST request to ${endpoint}:`, error);
      throw error;
    }
  }

  async _handleResponse(response) {
    if (!response.ok) {
      const errorDetails = await response.text();
      throw new Error(`HTTP error! status: ${response.status}, details: ${errorDetails}`);
    }
    return response.json();
  }

  async _getRequestNoBase(url) {
    try {
      const response = await fetch(`${url}`, {
        method: 'GET',
        headers: { 'Content-Type': 'application/json' },
      });
      console.log(`api endpoint: ${url}`);
      return await this._handleResponse(response);
    } catch (error) {
      console.error(`Error during GET request to ${url}:`, error);
      throw error;
    }
  }
}

export { LoadBalancerAPI };