/**
 * @fileoverview Manages search functionality for the room interface.
 * This file handles:
 * - Quick search input processing
 * - Debounced search execution
 * - File filtering based on search terms
 * - Search state management
 * - Clear search functionality
 */

/**
 * @class SearchManager
 * @classdesc Manages search operations including input handling, debounced search execution,
 * and file filtering based on search criteria.
 */
export class SearchManager {
    /**
     * Creates a new SearchManager instance.
     * @param {RoomManager} roomManager - The parent RoomManager instance
     */
    constructor(roomManager) {
        this.roomManager = roomManager;
        this.searchInput = document.getElementById('quickSearchInput');
        this.clearSearchBtn = document.getElementById('clearSearchBtn');
        this.isSearching = false;
    }
    
    /**
     * Initializes the search functionality.
     * Sets up event listeners for search input and clear button.
     * Creates a debounced search function to prevent excessive searches.
     */
    initialize() {
        if (!this.searchInput) return;
        
        // Create debounced search function
        const debouncedSearch = this.debounce((searchTerm) => {
            if (searchTerm) {
                this.isSearching = true;
                this.performSearch(searchTerm);
                this.clearSearchBtn.style.display = 'block';
            } else {
                this.isSearching = false;
                this.roomManager.fileManager.fetchFiles(); // Reset to show all files
                this.clearSearchBtn.style.display = 'none';
            }
        }, 300);
        
        // Add input event listener
        this.searchInput.addEventListener('input', (e) => {
            const searchTerm = e.target.value.trim();
            debouncedSearch(searchTerm);
        });
        
        // Add clear search button functionality
        if (this.clearSearchBtn) {
            this.clearSearchBtn.addEventListener('click', () => {
                this.searchInput.value = '';
                this.isSearching = false;
                this.roomManager.fileManager.fetchFiles(); // Reset to show all files
                this.clearSearchBtn.style.display = 'none';
            });
        }
    }
    
    /**
     * Performs the search operation using the server-side search endpoint.
     * @param {string} searchTerm - The term to search for
     */
    performSearch(searchTerm) {
        // Fetch all files from the server for searching
        fetch(`/api/rooms/${this.roomManager.roomId}/search?query=${encodeURIComponent(searchTerm)}`)
            .then(response => response.json())
            .then(files => {
                // Modify the file objects to show full paths in search results
                const modifiedFiles = files.map(file => ({
                    ...file,
                    displayName: this.isSearching ? file.full_path : file.name
                }));
                
                this.roomManager.viewManager.renderFiles(modifiedFiles);
            })
            .catch(error => {
                console.error('Error performing search:', error);
            });
    }
    
    /**
     * Creates a debounced version of a function.
     * Delays the execution of the function until after a specified wait time
     * has elapsed since the last time it was invoked.
     * @param {Function} func - The function to debounce
     * @param {number} wait - The number of milliseconds to delay
     * @returns {Function} The debounced function
     */
    debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    }
}