/**
 * TTSHandlerModule Base Class
 * Base class for all TTS handler modules
 */
import { BaseModule } from './base-module.js';

export class TTSHandlerModule extends BaseModule {
    constructor(id, name) {
        super(id, name);
        
        // Common TTS handler properties
        this.isReady = false;
        this.isSpeaking = false;
        this.currentUtterance = null;
        this.voices = [];
        this.currentVoice = null;
        this.defaultVoice = null;
        this.speechRate = 1.0;
        this.pitch = 1.0;
        this.volume = 1.0;
        
        // Common dependencies for TTS handlers
        this.dependencies = ['persistence-manager', 'localization'];
        
        // Bind common methods
        this.bindMethods([
            'speak',
            'stop',
            'getVoices',
            'setVoice',
            'configure',
            'generateSpeech'
        ]);
    }
    
    /**
     * Get the handler ID
     * @returns {string} - The handler ID
     */
    getId() {
        return this.id;
    }
    
    /**
     * Initialize the TTS handler
     * @returns {Promise<boolean>} - Resolves with success status
     */
    async initialize() {
        try {
            this.reportProgress(20, `Initializing ${this.name}`);
            
            // Check for required dependencies
            const persistenceManager = this.getModule('persistence-manager');
            if (!persistenceManager) {
                console.error(`${this.name}: Persistence Manager dependency not found`);
                return false;
            }
            
            // Load preferences
            this.loadPreferences(persistenceManager);
            
            // Set up event listeners
            this.setupEventListeners();
            
            return true;
        } catch (error) {
            console.error(`${this.name}: Initialization error`, error);
            return false;
        }
    }
    
    /**
     * Load preferences from persistence manager
     * @param {Object} persistenceManager - The persistence manager module
     */
    loadPreferences(persistenceManager) {
        // Load common preferences
        this.speechRate = persistenceManager.getPreference('tts', 'rate', 1.0);
        this.pitch = persistenceManager.getPreference('tts', 'pitch', 1.0);
        this.volume = persistenceManager.getPreference('tts', 'volume', 1.0);
    }
    
    /**
     * Set up common event listeners
     */
    setupEventListeners() {
        // To be implemented by subclasses if needed
    }
    
    /**
     * Check if the handler is ready
     * @returns {boolean} - Whether the handler is ready
     */
    isHandlerReady() {
        return this.isReady;
    }
    
    /**
     * Check if the handler is currently speaking
     * @returns {boolean} - Whether the handler is speaking
     */
    isSpeakingNow() {
        return this.isSpeaking;
    }
    
    /**
     * Get available voices
     * @returns {Promise<Array>} - Resolves with array of voice objects
     */
    async getVoices() {
        return this.voices;
    }
    
    /**
     * Set the voice to use
     * @param {string} voiceId - Voice identifier
     * @returns {boolean} - Success status
     */
    setVoice(voiceId) {
        // To be implemented by subclasses
        return false;
    }
    
    /**
     * Configure TTS parameters
     * @param {Object} options - Configuration options
     * @returns {boolean} - Success status
     */
    configure(options) {
        let changed = false;
        
        if (options.voice && options.voice !== this.currentVoice) {
            this.setVoice(options.voice);
            changed = true;
        }
        
        if (options.speed && options.speed !== this.speechRate) {
            this.speechRate = options.speed;
            changed = true;
        }
        
        if (options.pitch && options.pitch !== this.pitch) {
            this.pitch = options.pitch;
            changed = true;
        }
        
        if (options.volume && options.volume !== this.volume) {
            this.volume = options.volume;
            changed = true;
        }
        
        // Save preferences if changed
        if (changed) {
            const persistenceManager = this.getModule('persistence-manager');
            if (persistenceManager) {
                persistenceManager.updatePreference('tts', 'rate', this.speechRate);
                persistenceManager.updatePreference('tts', 'pitch', this.pitch);
                persistenceManager.updatePreference('tts', 'volume', this.volume);
                if (this.currentVoice) {
                    persistenceManager.updatePreference('tts', `${this.id}_voice`, this.currentVoice);
                }
            }
        }
        
        return changed;
    }
    
    /**
     * Speak text
     * @param {string} text - Text to speak
     * @param {Function} callback - Callback for when speech completes
     * @returns {boolean} - Success status
     */
    speak(text, callback) {
        // To be implemented by subclasses
        console.error(`${this.name}: speak() method not implemented`);
        if (callback) {
            setTimeout(() => callback({ success: false, reason: 'not_implemented' }), 0);
        }
        return false;
    }
    
    /**
     * Stop speaking
     * @returns {boolean} - Success status
     */
    stop() {
        // To be implemented by subclasses
        return false;
    }
    
    /**
     * Generate speech audio data
     * @param {string} text - Text to generate speech for
     * @param {Object} options - Generation options
     * @returns {Promise<Object>} - Resolves with audio data
     */
    async generateSpeech(text, options = {}) {
        // To be implemented by subclasses
        return { success: false, reason: 'not_implemented' };
    }
}