(async function() {
    if(typeof PIXI!="object") {
        if(typeof loadfail=="function") {
            loadfail("libpointerfx.js: PIXI(type of "+(typeof PIXI)+") is not an object");
        } else {
            window.alert("libpointerfx.js: PIXI(type of "+(typeof PIXI)+") is not an object");
        }
        return;
    }
    if(typeof Transition!="function") {
        if(typeof loadfail=="function") {
            loadfail("libpointerfx.js: Transition(type of "+(typeof Transition)+") is not an function");
        } else {
            window.alert("libpointerfx.js: Transition(type of "+(typeof Transition)+") is not an function");
        }
        return;
    }
    if(typeof libmain!="object") {
        if(typeof loadfail=="function") {
            loadfail("libpointerfx.js: libmain(type of "+(typeof libmain)+") is not an object");
        } else {
            window.alert("libpointerfx.js: libmain(type of "+(typeof libmain)+") is not an object");
        }
        return;
    }

    var libpointerfx= {};

    libpointerfx.fx_template_list=[];
    libpointerfx.fx_instance_map= {};
    libpointerfx.fx_pointer_texture=PIXI.Texture.WHITE;

    // pack sprite sheet into PIXI.GifSprite
    libpointerfx.fx_tail_anim_textures=[];
    var tail_base=await PIXI.Assets.load({"src":await AssetManager.loadWithCache("./assets/sprite-pointer_tail.png"), "loadParser":"loadTextures"});
    for(var i=9; i>=0; i--) {
        var crop_rect = new PIXI.Rectangle(i*32, 0, 32, 32);
        var t=PIXI.Texture.from(tail_base.source);
        t.frame.x=i*32;
        t.frame.y=0;
        t.frame.width=32;
        t.frame.height=32;
        t.updateUvs();
        libpointerfx.fx_tail_anim_textures.push(t);
    }

    var on_pointer_down=function(event) {
        var pointer_id=event.pointerType+event.pointerId;
        var fx_instance = new PIXI.Sprite(libpointerfx.fx_pointer_texture);
        fx_instance.anchor.set(0.5, 0.5);
        fx_instance.position.copyFrom(event.global);
        fx_instance.width=4;
        fx_instance.height=4;

        libpointerfx.fx_instance_map[pointer_id] = fx_instance;
        libmain.scenes.pointer_fx.root.addChild(fx_instance);
    };

    var on_pointer_move=function(event) {
        var pointer_id=event.pointerType+event.pointerId;
        if(!(pointer_id in libpointerfx.fx_instance_map)) {
            //console.warn("warn: pointer_id `"+pointer_id+"` is NOT in libpointerfx.fx_instance_map");
            return;
        }
        libpointerfx.fx_instance_map[pointer_id].position.copyFrom(event.global);

        var fx_instance = new PIXI.AnimatedSprite(libpointerfx.fx_tail_anim_textures);
        fx_instance.anchor.set(0.5, 0.5);
        fx_instance.position.copyFrom(event.global);
        fx_instance.width=32;
        fx_instance.height=32;
        fx_instance.animationSpeed=0.4;
        fx_instance.autoUpdate=true;
        fx_instance.currentFrame=0;
        fx_instance.loop=true;
        fx_instance.play();

        var func_remove=function() {
            libmain.scenes.pointer_fx.root.removeChild(fx_instance);
        };
        libmain.scenes.pointer_fx.root.addChild(fx_instance);
        var fx_end_transition=new Transition();
        fx_end_transition.obj=fx_instance;
        fx_end_transition.key="alpha";
        fx_end_transition.startval=1.0;
        fx_end_transition.endval=0.0;
        fx_end_transition.duration=300;
        fx_end_transition.onend=func_remove;
        fx_end_transition.start();
    };

    var on_pointer_up=function(event) {
        var pointer_id=event.pointerType+event.pointerId;
        if(!(pointer_id in libpointerfx.fx_instance_map)) {
            //console.warn("warn: pointer_id `"+pointer_id+"` is NOT in libpointerfx.fx_instance_map");
            return;
        }
        var fx_instance_toend=libpointerfx.fx_instance_map[pointer_id];
        delete(libpointerfx.fx_instance_map[pointer_id]);
        var func_remove=function() {
            libmain.scenes.pointer_fx.root.removeChild(fx_instance_toend);
        };
        var fx_end_transition=new Transition();
        fx_end_transition.obj=fx_instance_toend;
        fx_end_transition.key="alpha";
        fx_end_transition.startval=1.0;
        fx_end_transition.endval=0.0;
        fx_end_transition.duration=300;
        fx_end_transition.onend=func_remove;
        fx_end_transition.start();
    };

    libmain.scenes.pointer_fx.root.interactiveChildren=false;

    libmain.scenes.pointer_fx.judge_rect.eventMode="static";
    libmain.scenes.pointer_fx.judge_rect.alpha=0.0;

    libmain.scenes.pointer_fx.judge_rect.on("pointerdown", on_pointer_down);
    libmain.scenes.pointer_fx.judge_rect.on("pointermove", on_pointer_move);
    libmain.scenes.pointer_fx.judge_rect.on("pointerup", on_pointer_up);
    libmain.scenes.pointer_fx.judge_rect.on("pointerout", on_pointer_up);

    libmain.scenes.pointer_fx.judge_rect.x=0;
    libmain.scenes.pointer_fx.judge_rect.y=0;
    libmain.scenes.pointer_fx.judge_rect.anchor.set(0, 0);

    //libmain.settings.hud.show_pointerfx

    window.libpointerfx=libpointerfx;
    console.log("[libpointerfx] initialized successfully.");
})();