frontend/src/api/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/instances');
  }

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

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

  async getTVEpisode(title, season, episode) {
    return this._getRequest(`/api/tv/${encodeURIComponent(title)}/${season}/${episode}`);
  }

  async getFilmIDByTitle(title) {
    return this._getRequest(`/api/filmid/${encodeURIComponent(title)}`);
  }

  async getEpisodeIDByTitleSeasonEpisode(title, season, episode) {
    return this._getRequest(`/api/episodeid/${encodeURIComponent(title)}/${season}/${episode}`);
  }

  async getCacheSize() {
    return this._getRequest('/api/cache/size');
  }

  async clearCache() {
    return this._postRequest('/api/cache/clear');
  }

  async getTVStore() {
    const response = await this._getRequest('/api/tv/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 getFilmStore() {
    const response = await this._getRequest('/api/film/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 getFilmMetadataByTitle(title) {
    return this._getRequest(`/api/film/metadata/${encodeURIComponent(title)}`);
  }

  async getTVMetadataByTitle(title) {
    return this._getRequest(`/api/tv/metadata/${encodeURIComponent(title)}`);
  }

  async getAllFilms() {
    return this._getRequest('/api/film/all');
  }

  async getAllTVShows() {
    return this._getRequest('/api/tv/all');
  }

  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 };