(async function () {

    const SENDER_ID = '140204589526'
        , API_KEY = 'AIzaSyC-lQBtmhMaLavwvc2-IsA7rBUKtkWxuiY'
        , PROJECT_ID = 'webpush-zdnet'
        , APP_ID = '1:140204589526:web:d0ca6d18cdfe1189cce477'

    const VAP_ID = "BMxLE6SBVJUO5w4hhOlRIzC8ihKf5mUPIbdK9LWc29WWX9OXZcXZuoDlyDuLSRb8UTyicNlwcSi-iKRJuMEI7SQ"

    if (!window.Notification) return

    const FIREBASE_SCRIPT = "https://www.gstatic.com/firebasejs/8.6.8/firebase-app.js"
    const MESSAGING_SCRIPT = "https://www.gstatic.com/firebasejs/8.6.8/firebase-messaging.js"
    const API_ENDPOINT = "https://push.asahiinteractive.com"

    function loadScript(src) {
        return new Promise(resolve => {
            const script = document.createElement("script")
            script.src = src
            script.onload = resolve
            document.body.appendChild(script)
        })
    }

    function requestAPI(url, data) {
        return new Promise((resolve, reject) => {
            fetch(API_ENDPOINT + url, {
                method: 'post', mode: "cors", cache: "no-cache",
                headers: {"Accept": "application/json", "Content-Type": "application/json"},
                body: JSON.stringify(data)
            })
                .then(response => resolve(response.json()))
                .catch(reject)
        })
    }

    function getToken() {
        return new Promise((resolve, reject) => {
            navigator.serviceWorker.getRegistration(window.__sw_script || "/firebase-messaging-sw.js")
                .then(reg => {
                    return messaging.getToken({vapidKey: VAP_ID, serviceWorkerRegistration: reg})
                })
                .then(resolve)
                .catch(reject)
        })
    }

    function registerWorker() {
        return new Promise((resolve, reject) => {
            navigator.serviceWorker.register(window.__sw_script || "/firebase-messaging-sw.js")
                .then(resolve)
                .catch(reject)
        })
    }

    function requestPermission() {
        return new Promise((resolve, reject) => {
            if (Notification.permission === 'default') {
                Notification.requestPermission()
                    .then(resolve)
                    .catch(reject)
            } else {
                resolve(Notification.permission)
            }
        })
    }

    function initPushNotification() {
        return new Promise((resolve, reject) => {
            requestPermission()
                .then(permission => {
                    if (permission !== 'granted') resolve()
                    return getToken()
                })
                .then(token => {
                    const currentToken = localStorage.getItem("PUSH_TOKEN")
                    if (currentToken === token) resolve()
                    localStorage.setItem("PUSH_TOKEN", token)
                    return requestAPI("/token_register", {
                        domain: location.host,
                        token: token,
                        ua: navigator.userAgent,
                        memberId: _getCookie('_aicid')
                    })
                })
                .then(resolve)
                .catch(reject)
        })
    }

    await loadScript(FIREBASE_SCRIPT)
    await loadScript(MESSAGING_SCRIPT)

    firebase.initializeApp({
        apiKey: API_KEY,
        projectId: PROJECT_ID,
        messagingSenderId: SENDER_ID,
        appId: APP_ID
    })

    const messaging = firebase.messaging()

    await registerWorker()

    await initPushNotification()

    window._initPushNotification = initPushNotification
    window._getNotificationPermission = () => Notification.permission
})()