// ==UserScript==
// @name         页面隐私保护
// @namespace    No Privacy Spys
// @version      2020.12.02.1
// @description  教练我在认真写代码！
// @author       PY-DNG
// @include      *
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_deleteValue
// @grant        GM_registerMenuCommand
// @run-at       document-start
// @downloadURL none
// ==/UserScript==
(function() {
    let protectSites;
    let canvas;

    //GM_setValue('protectSites', ['www.lianaiyx.com']);

    // delete the item we want from the array we choose
    function delItem(array, item) {
        array.forEach(function(arritem, index, arr) {
            if(arritem === item) {
                arr.splice(index, 1);
            }
        })
    }

    let protect = function() {
        blur();
    }

    let recover = function() {
        cancelBlur();
    }

    let config = function() {
        // Initialize protectSites
        protectSites = GM_getValue('protectSites', '');
        if (protectSites === '') {
            protectSites = [];
            GM_setValue('protectSites', protectSites);
        }
    }

    function cancelBlur() {
        document.body.style.filter = 'none';
        document.body.style.pointerEvents = 'auto';
        canvas.style.display = 'none';
    }

    function blur() {
        console.log('blur');
        if (!canvas) {
            setTimeout(blur, 100);
            return;
        }
        document.body.style.filter = 'blur(40px)';
        document.body.style.pointerEvents = 'none';
        canvas.style.display = '';
    }

    let initGUI = function() {
        canvas = document.createElement('canvas');
        canvas.addEventListener('click', cancelBlur);
        canvas.style.position = 'fixed';
        canvas.style.left = 0;
        canvas.style.top = 0;
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;
        canvas.style.display = 'none';
        document.lastChild.appendChild(canvas);
    }

    let addThisSite = function() {
        const site = location.href.match(/^https?:\/\/(.*?)\//)[1];
        protectSites.push(site);
        GM_setValue('protectSites', protectSites);
        initGUI();
        protect();
        window.addEventListener('visibilitychange', protect);
        //GM_registerMenuCommand()
    }

    let delThisSite = function() {
        const site = location.href.match(/^https?:\/\/(.*?)\//)[1];
        delItem(protectSites, site);
        GM_setValue('protectSites', protectSites);
        recover();
        window.removeEventListener('visibilitychange', protect);
        //GM_registerMenuCommand()
    }

    let init = function() {
        config();
        const site = location.href.match(/^https?:\/\/(.*?)\//)[1];
        if (protectSites.indexOf(site) != -1) {
            window.addEventListener('load', initGUI);
            window.addEventListener('visibilitychange', protect);
            window.addEventListener('load', function() {if (Document.visibilityState === 'hidden') {protect();};})
        }
        GM_registerMenuCommand((protectSites.indexOf(site) === -1 ? '保护' : '不保护') + site, protectSites.indexOf(site) === -1 ? addThisSite : delThisSite);
    }

    init();
})();