class Gamepad{
	constructor(keyboard){
		var kbd = keyboard.getBindings()
		this.gameBtn = {}
		this.gameBtn[kbd["don_l"]] = ["u", "d", "l", "r"]
		this.gameBtn[kbd["don_r"]] = ["a", "b", "x", "y"]
		this.gameBtn[kbd["ka_l"]] = ["lb", "lt"]
		this.gameBtn[kbd["ka_r"]] = ["rb", "rt"]
		this.menuBtn = {}
		this.menuBtn[kbd["pause"]] = ["start"]
		this.b = {
			"a": "0",
			"b": "1",
			"x": "2",
			"y": "3",
			"lb": "4",
			"rb": "5",
			"lt": "6",
			"rt": "7",
			"back": "8",
			"start": "9",
			"ls": "10",
			"rs": "11",
			"u": "12",
			"d": "13",
			"l": "14",
			"r": "15",
			"guide": "16"
		}
		this.btn = {}
		this.keyboard = keyboard
	}
	play(menuPlay){
		if("getGamepads" in navigator){
			var gamepads = navigator.getGamepads()
		}else{
			return
		}
		var bindings = menuPlay ? this.menuBtn : this.gameBtn
		for(var i = 0; i < gamepads.length; i++){
			if(gamepads[i]){
				this.toRelease = {}
				for(var bind in bindings){
					this.toRelease[bind] = bindings[bind].length
				}
				for(var btnName in gamepads[i].buttons){
					buttonSearch: {
						for(var bind in bindings){
							for(var name in bindings[bind]){
								if(btnName === this.b[bindings[bind][name]]){
									this.checkButton(gamepads, btnName, bind)
									break buttonSearch
								}
							}
						}
					}
				}
				break
			}
		}
	}
	checkButton(gamepads, btnName, keyCode){
		var button = false
		for(var i = 0; i < gamepads.length; i++){
			if(gamepads[i]){
				var btnPressed = gamepads[i].buttons[btnName].pressed
				if(btnPressed){
					button = btnPressed
				}
			}
		}
		var pressed = !this.btn[btnName] && button
		var released = this.btn[btnName] && !button
		if(pressed){
			this.btn[btnName] = true
		}else if(released){
			delete this.btn[btnName]
		}
		if(pressed){
			if(this.keyboard.getKeys()[keyCode]){
				this.keyboard.setKey(keyCode, false)
			}
			this.keyboard.setKey(keyCode, true)
		}else if(!button && this.keyboard.getKeys()[keyCode]){
			if(released){
				this.toRelease[keyCode + "released"] = true
			}
			this.toRelease[keyCode]--
			if(this.toRelease[keyCode] === 0 && this.toRelease[keyCode + "released"]){
				this.keyboard.setKey(keyCode, false)
			}
		}
	}
}