// Updated storage utility with additional functions

// Type for storing watch history and progress
export interface WatchProgress {
  currentTime: number;
  duration: number;
  lastPlayed: string;
  completed: boolean;
}

// Type for my list items
export interface MyListItem {
  id: string;
  title: string;
  type: 'movie' | 'tvshow';
  addedAt: string;
  posterPath?: string;
  backdropPath?: string;
}

/**
 * Save video watch progress
 */
export const saveVideoProgress = (
  type: 'movie' | 'tvshow',
  title: string,
  seasonEpisode: string | null,
  progress: WatchProgress
): void => {
  try {
    // Create a unique identifier for the content
    const id = seasonEpisode ? `${type}-${title}-${seasonEpisode}` : `${type}-${title}`;
    
    // Get existing watch history
    const historyStr = localStorage.getItem('watch-history') || '{}';
    const history = JSON.parse(historyStr);
    
    // Update the history with new progress
    history[id] = { 
      ...progress, 
      title,
      type,
      seasonEpisode,
      updatedAt: new Date().toISOString() 
    };
    
    // Save back to localStorage
    localStorage.setItem('watch-history', JSON.stringify(history));
  } catch (error) {
    console.error('Failed to save video progress:', error);
  }
};

/**
 * Get video watch progress
 */
export const getVideoProgress = (
  type: 'movie' | 'tvshow',
  title: string,
  seasonEpisode: string | null
): WatchProgress | null => {
  try {
    // Create a unique identifier for the content
    const id = seasonEpisode ? `${type}-${title}-${seasonEpisode}` : `${type}-${title}`;
    
    // Get existing watch history
    const historyStr = localStorage.getItem('watch-history') || '{}';
    const history = JSON.parse(historyStr);
    
    // Return the progress if it exists
    return history[id] || null;
  } catch (error) {
    console.error('Failed to get video progress:', error);
    return null;
  }
};

/**
 * Get watch history
 */
export const getWatchHistory = (limit: number = 0): Array<any> => {
  try {
    // Get existing watch history
    const historyStr = localStorage.getItem('watch-history') || '{}';
    const history = JSON.parse(historyStr);
    
    // Convert object to array and sort by updatedAt (most recent first)
    const historyArray = Object.values(history).sort((a: any, b: any) => {
      return new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime();
    });
    
    // Return all or limited number of items
    return limit > 0 ? historyArray.slice(0, limit) : historyArray;
  } catch (error) {
    console.error('Failed to get watch history:', error);
    return [];
  }
};

/**
 * Clear watch history
 */
export const clearWatchHistory = (): void => {
  try {
    localStorage.removeItem('watch-history');
  } catch (error) {
    console.error('Failed to clear watch history:', error);
  }
};

/**
 * Add item to My List
 */
export const addToMyList = (item: MyListItem): void => {
  try {
    // Get existing my list
    const myListStr = localStorage.getItem('my-list') || '[]';
    const myList = JSON.parse(myListStr);
    
    // Check if item already exists
    const exists = myList.some((listItem: MyListItem) => 
      listItem.title === item.title && listItem.type === item.type
    );
    
    // Add item if it doesn't exist
    if (!exists) {
      myList.push({
        ...item,
        addedAt: new Date().toISOString()
      });
      
      // Save back to localStorage
      localStorage.setItem('my-list', JSON.stringify(myList));
    }
  } catch (error) {
    console.error('Failed to add item to My List:', error);
  }
};

/**
 * Remove item from My List
 */
export const removeFromMyList = (title: string, type: 'movie' | 'tvshow'): void => {
  try {
    // Get existing my list
    const myListStr = localStorage.getItem('my-list') || '[]';
    const myList = JSON.parse(myListStr);
    
    // Filter out the item
    const newList = myList.filter((item: MyListItem) => 
      !(item.title === title && item.type === type)
    );
    
    // Save back to localStorage
    localStorage.setItem('my-list', JSON.stringify(newList));
  } catch (error) {
    console.error('Failed to remove item from My List:', error);
  }
};

/**
 * Check if item is in My List
 */
export const isInMyList = (title: string, type: 'movie' | 'tvshow'): boolean => {
  try {
    // Get existing my list
    const myListStr = localStorage.getItem('my-list') || '[]';
    const myList = JSON.parse(myListStr);
    
    // Check if item exists
    return myList.some((item: MyListItem) => 
      item.title === title && item.type === type
    );
  } catch (error) {
    console.error('Failed to check if item is in My List:', error);
    return false;
  }
};

/**
 * Get all items from My List
 */
export const getAllFromMyList = (): Array<MyListItem> => {
  try {
    // Get existing my list
    const myListStr = localStorage.getItem('my-list') || '[]';
    return JSON.parse(myListStr);
  } catch (error) {
    console.error('Failed to get My List:', error);
    return [];
  }
};

/**
 * Clear My List
 */
export const clearMyList = (): void => {
  try {
    localStorage.removeItem('my-list');
  } catch (error) {
    console.error('Failed to clear My List:', error);
  }
};

// Example of a function that could be replaced with a database implementation
// This can be swapped out with a DB implementation later
export const storageService = {
  // Video progress functions
  saveVideoProgress,
  getVideoProgress,
  getWatchHistory,
  clearWatchHistory,
  
  // My list functions
  addToMyList,
  removeFromMyList,
  isInMyList,
  getAllFromMyList,
  clearMyList,
  
  // Generic storage functions that could be replaced
  setItem: (key: string, value: any): void => {
    try {
      localStorage.setItem(key, JSON.stringify(value));
    } catch (error) {
      console.error(`Failed to store ${key}:`, error);
    }
  },
  
  getItem: <T>(key: string, defaultValue: T): T => {
    try {
      const item = localStorage.getItem(key);
      return item ? JSON.parse(item) : defaultValue;
    } catch (error) {
      console.error(`Failed to retrieve ${key}:`, error);
      return defaultValue;
    }
  },
  
  removeItem: (key: string): void => {
    try {
      localStorage.removeItem(key);
    } catch (error) {
      console.error(`Failed to remove ${key}:`, error);
    }
  }
};

export default storageService;