define(function() {

    var InfoManager = Class.extend({
        init: function(game) {
            this.game = game;
            this.infos = {};
            this.destroyQueue = [];
        },
    
        addDamageInfo: function(value, x, y, type) {
            var time = this.game.currentTime,
                id = time+""+Math.abs(value)+""+x+""+y,
                self = this,
                info = new DamageInfo(id, value, x, y, DamageInfo.DURATION, type);
        
            info.onDestroy(function(id) {
                self.destroyQueue.push(id);
            });
            this.infos[id] = info;
        },
    
        forEachInfo: function(callback) {
            var self = this;
        
            _.each(this.infos, function(info, id) {
                callback(info);
            });
        },
    
        update: function(time) {
            var self = this;
        
            this.forEachInfo(function(info) {
                info.update(time);
            });
        
            _.each(this.destroyQueue, function(id) {
                delete self.infos[id];
            });
            this.destroyQueue = [];
        }
    });


    var damageInfoColors = {
        "received": {
            fill: "rgb(255, 50, 50)",
            stroke: "rgb(255, 180, 180)"
        },
        "inflicted": {
            fill: "white",
            stroke: "#373737"
        },
        "healed": {
            fill: "rgb(80, 255, 80)",
            stroke: "rgb(50, 120, 50)"
        }
    };


    var DamageInfo = Class.extend({
        DURATION: 1000,
    
        init: function(id, value, x, y, duration, type) {
            this.id = id;
            this.value = value;
            this.duration = duration;
            this.x = x;
            this.y = y;
            this.opacity = 1.0;
            this.lastTime = 0;
            this.speed = 100;
            this.fillColor = damageInfoColors[type].fill;
            this.strokeColor = damageInfoColors[type].stroke;
        },
    
        isTimeToAnimate: function(time) {
        	return (time - this.lastTime) > this.speed;
        },
    
        update: function(time) {
            if(this.isTimeToAnimate(time)) {
                this.lastTime = time;
                this.tick();
            }
        },
    
        tick: function() {
            this.y -= 1;
            this.opacity -= 0.07;
            if(this.opacity < 0) {
                this.destroy();
            }
        },
    
        onDestroy: function(callback) {
            this.destroy_callback = callback;
        },
    
        destroy: function() {
            if(this.destroy_callback) {
                this.destroy_callback(this.id);
            }
        }
    });
    
    return InfoManager;
});