'use strict'

// 配置
const pwaCdnConfig = {
    cdnUrl: 'https://cdn.fillcode.com/',
    serviceWorkerUrl: '/__static/sw-cdn.js',
    staticRegex: /\.(js|css|png|jpg|jpeg|gif|svg|webp|woff|woff2|ttf|ico)$/,
    debug: false,
}

/**
 * PWA 初始化函数
 */
async function initializePWA() {
    // 检查支持
    if (!('serviceWorker' in navigator)) return console.log('PWA-CDN: Service Worker not supported')

    let registration;

    try {
        // 注册Service Worker - 使用相对路径
        registration = await navigator.serviceWorker.register(pwaCdnConfig.serviceWorkerUrl, {scope: '/'})

        console.log('PWA-CDN: Service Worker registered')
    } catch (error) {
        console.error('PWA-CDN: Failed to register Service Worker:', error)
    }

    // 发送初始配置
    const sendConfig = () => {
        registration.active.postMessage({type: 'CONFIG', config: pwaCdnConfig})
    }

    // 如果注册失败，直接返回错误
    if(!registration) return console.error('PWA-CDN: Service Worker registration failed, cannot send config')

    // 更新配置函数
    window.updatePWACDNConfig = (newConfig) => {
        Object.assign(pwaCdnConfig, newConfig)
        sendConfig()
    }

    // 等待Service Worker激活后发送配置
    if (registration.active)  sendConfig()

    // 监听Service Worker更新事件
    registration.addEventListener('updatefound', () => {
        const newWorker = registration.installing

        newWorker.addEventListener('statechange', () => {
            if (newWorker.state === 'activated') sendConfig()
        })
    })
}

/**
 * 启动 PWA-CDN
 * */
initializePWA().catch(console.error)