import Logger from './logger.js';
import AppState from './state.js';
import PerformanceMonitor from './perf-monitor.js';
import LazyLoader from './lazy-loader.js';
import { APIClient, setSharedAPIInstance } from './api.js';

class Application {
    constructor() {
        try {
            this.logger = new Logger({
                level: 'debug',
                maxLogs: 200,
                enableRemote: false
            });

            this.appState = new AppState({
                currentView: 'files',
                currentPage: 'files',
                user: null,
                isLoading: false,
                notifications: []
            });

            this.perfMonitor = new PerformanceMonitor(this.logger);

            this.api = new APIClient('/', this.logger, this.perfMonitor, this.appState);

            setSharedAPIInstance(this.api);

            this.lazyLoader = new LazyLoader({
                threshold: 0.1,
                rootMargin: '50px',
                logger: this.logger
            });

            this._setupStateSubscriptions();
            this._makeGloballyAccessible();

            this.initialized = true;

            this.logger.info('Application initialized successfully', {
                version: '1.0.0',
                timestamp: new Date().toISOString()
            });
        } catch (error) {
            console.error('CRITICAL: Application initialization failed', error);
            this.initialized = false;
            throw error;
        }
    }

    _setupStateSubscriptions() {
        this.appState.subscribe((newState, prevState, action) => {
            this.logger.debug('State changed', {
                from: prevState,
                to: newState,
                action
            });
        });
    }

    _makeGloballyAccessible() {
        if (typeof window !== 'undefined') {
            window.app = this;
        }
    }

    isReady() {
        return this.initialized === true;
    }

    getLogger() {
        if (!this.initialized) {
            console.warn('Application not fully initialized');
        }
        return this.logger;
    }

    getState() {
        if (!this.initialized) {
            console.warn('Application not fully initialized');
        }
        return this.appState;
    }

    getAPI() {
        if (!this.initialized) {
            console.warn('Application not fully initialized');
        }
        return this.api;
    }

    getPerfMonitor() {
        if (!this.initialized) {
            console.warn('Application not fully initialized');
        }
        return this.perfMonitor;
    }

    getLazyLoader() {
        if (!this.initialized) {
            console.warn('Application not fully initialized');
        }
        return this.lazyLoader;
    }
}

const app = new Application();

export { Application, app };
export default app;