/**
 * Route Middleware
 * 
 * Provides route-level middleware for cross-cutting concerns.
 */

import { Logger } from '../../core/logger.js';

/**
 * RouteMiddleware - Route middleware
 */
export class RouteMiddleware {
    constructor(name, middlewareFn) {
        this.name = name;
        this.middlewareFn = middlewareFn;
    }
    
    /**
     * Create a new RouteMiddleware
     */
    static create(name, middlewareFn) {
        return new RouteMiddleware(name, middlewareFn);
    }
    
    /**
     * Execute middleware
     */
    async execute(to, from, next, context = {}) {
        try {
            await this.middlewareFn(to, from, next, context);
        } catch (error) {
            Logger.error(`[RouteMiddleware] Middleware "${this.name}" error:`, error);
            next(false); // Block navigation
        }
    }
}

/**
 * Built-in middleware
 */
export const BuiltInMiddleware = {
    /**
     * Analytics middleware
     */
    analytics: RouteMiddleware.create('analytics', async (to, from, next) => {
        // Track page view
        if (typeof window !== 'undefined' && window.analytics) {
            window.analytics.track('page_view', {
                path: to.path,
                title: to.title
            });
        }
        next();
    }),
    
    /**
     * Loading middleware
     */
    loading: RouteMiddleware.create('loading', async (to, from, next) => {
        // Show loading indicator
        document.body.classList.add('route-loading');
        next();
        
        // Hide loading indicator after navigation
        setTimeout(() => {
            document.body.classList.remove('route-loading');
        }, 100);
    }),
    
    /**
     * Scroll to top middleware
     */
    scrollToTop: RouteMiddleware.create('scroll-to-top', async (to, from, next) => {
        next();
        window.scrollTo({ top: 0, behavior: 'smooth' });
    })
};