$(function(){
    function isMobile(){
        var userAgentInfo = navigator.userAgent;
        var mobileAgents = ["Android", "iPhone",
                    "SymbianOS", "Windows Phone",
                    "iPad", "iPod"];
        var flag = true;
        for(var i = 0; i < mobileAgents.length; i ++){
            if (userAgentInfo.indexOf(mobileAgents[i]) != -1) {
                return true;
            }
        }
        return false;
    }
    
    function initBackgroundImage(params){
        let bgImg = new isekai.BgImage();

        let bgImgElement = $('body').append('<div class="isekai-bgimg"></div>').find('div.isekai-bgimg:last');

        bgImg.addViewport(bgImgElement);

        bgImg.addBlurBackground($('#mw-panel .portal'));
        bgImg.addBlurBackground($('#p-personal'));
        bgImg.addBlurBackground($('#footer'));
        bgImg.addBlurBackground($('#left-navigation'));
        bgImg.addBlurBackground($('#right-navigation'));
        bgImg.addBlurBackground($('#content'));

        if(!('xcenter' in params)){
            params.xcenter = 50;
        }
        if(!('ycenter' in params)){
            params.ycenter = 50;
        }

        bgImg.loadImage(params.src, params.xcenter, params.ycenter);
    }

    var showBackgroundWidget = true;
    if(isMobile() && !mw.user.options.get('isekai-bgimg-visible-mobile', true)){
        showBackgroundWidget = false;
    } else if(!mw.user.options.get('isekai-bgimg-visible-desktop', true)) {
        showBackgroundWidget = false;
    }

    

    if(showBackgroundWidget){
        var params = mw.config.get('isekaiBackgroundWidgetData');
        if(params && params.src){
            $('body').addClass('has-bgimg');
            if(window.requestAnimationFrame){
                window.requestAnimationFrame(function(){
                    initBackgroundImage(params);
                });
            } else {
                setTimeout(function(){
                    initBackgroundImage(params);
                }, 0);
            }
        } else {
            console.log(mw.message('isekai-background-widget-param-error').parse(), params);
        }
    }
});