const UP_KEY = "KeyW";
const DOWN_KEY = "KeyS";
const LEFT_KEY = "KeyA";
const RIGHT_KEY = "KeyD";
const ACT_KEY = "KeyE";
const MENU_KEY = "KeyQ";

class bpu_window {
	constructor (frameBufferRef, coordinates, dimentions, options) {
		this.parentBuffer = frameBufferRef;
		this.coordinates = coordinates instanceof vector ? (coordinates.d.length == 2 ? coordinates : new vector([0,0])) : new vector([0,0]);
		this.dimentions = dimentions instanceof vector ? (dimentions.d.length == 2 ? dimentions : new vector([0,0])) : new vector([0,0]);
		// add options for title bar, close button, and minimize button
		// add container object for window, container for optional title bar, and container for contents. 
	}
}

class bpu_menu { 
	constructor (frameBufferRef, dimentions, closeable, options, callbackArray) {
		this.parentBuffer = frameBufferRef;
		this.closeable = "boolean" == typeof closeable ? closeable : true;
		this.options = Array.isArray(options) ? options : ["Empty Menu"];
		this.callbackArray = Array.isArray(callbackArray) ? callbackArray : options.map(o=>{ return function () { print(o); } });
		this.callbackArray = this.callbackArray.map(cb=>{ if ("function" == typeof cb) { return cb; } else { return ()=> { print("Not Implimented") }; } });
		this.dimentions = dimentions instanceof vector ? dimentions : new vector([500,500]);
		this.renderLayer = new container( new vector([0,0]), this.dimentions);
		this.active = false;
		this.selectedOption = 0;
		this.renderLayer.addShape(new shape("rect", new vector([0,0]), this.dimentions, null, "#ffffff", "#000000", 2));
		this.selectorShape = new shape("rect", new vector([5,2]), new vector([this.dimentions.d[0] - 10, 16]), null, "#aaaaaa", "#000000", 2);
		this.renderLayer.addShape(this.selectorShape);
		// add case for menu with more options than screen allows
		this.optionShapes = [];
		for (var i = 0; i < this.options.length; i++) {
			var thisOption = this.options[i];
			this.optionShapes[i] = new shape("text", new vector([10,20+20*i]), new vector([this.dimentions.d[0] - 20,20]), null, "#000000", null, null, {text:thisOption});
			this.renderLayer.addShape(this.optionShapes[i]);
		}

	}

	activate () {
		this.previousMenu = window.activeMenu;
		window.activeMenu = this;
		this.active = true;
		this.selectedOption = 0;
		this.selectorShape.coordinates.d[1] = 8 + 20 * this.selectedOption;
		this.parentBuffer.addContainer(this.renderLayer);
	}

	deactivate () {
		window.activeMenu = this.previousMenu;
		var layerID = this.parentBuffer.containerArray.indexOf(this.renderLayer);
		this.parentBuffer.containerArray.splice(layerID,1);
	}

	selectItem () {
		this.deactivate();
		this.callbackArray[this.selectedOption]();
	}

	move (n) {
		this.selectedOption = (this.selectedOption + n + this.options.length) % this.options.length;
		this.selectorShape.coordinates.d[1] = 8 + 20 * this.selectedOption;
	}

	controls (e) {
		var input = e.code;
		if ((input == MENU_KEY) && this.closeable ) { this.deactivate(); }
		if (input == ACT_KEY) { this.selectItem(); }
		if (input == UP_KEY) { this.move(-1); }
		if (input == DOWN_KEY) { this.move(1); }
	}
}

class bpu_dialogBox {
	constructor (parentBufferRef) {
		this.parentBufferRef = parentBufferRef;
		this.messageLayer = new container(new vector([0, parentBufferRef.height - 100]), new vector([parentBufferRef.width, 100]));
		this.messageLayer.addShape( new shape("rect", new vector([0,0]), this.messageLayer.size, null, "#ffffff", "#000000", 1));
		this.line = [
			new shape("text", new vector([30,30]), new vector([this.messageLayer.size.d[0]-20,30]),null, "#000000"),
			new shape("text", new vector([30,60]), new vector([this.messageLayer.size.d[0]-20,30]),null, "#000000")
		];
		this.textQueue = [];
		this.messageLayer.addShape( this.line[0] );
		this.messageLayer.addShape( this.line[1] );
	}

	progressMessage () {
		if (this.textQueue.length <= 1) { 
			if (undefined != this.choice) {
				this.choice.activate();
				this.choice = undefined;
				return;
			} else {
				this.deactivate(); 
			}
		}
		this.textQueue.shift();
		this.line[0].text = "string" == typeof this.textQueue[0] ? this.textQueue[0] : "";
		this.line[1].text = "string" == typeof this.textQueue[1] ? this.textQueue[1] : "";
	}

	activate (message="No message", interactive, choice)  {
		message = "string" == typeof message ? message : "No valid text";
		interactive = "boolean" == typeof interactive ? interactive : false;
		this.choice = choice instanceof menu ? choice : undefined;
		this.textQueue.push(...message.match(/.{1,50}( |$)/g));
		if (!this.parentBufferRef.containerArray.includes(this.messageLayer)) {
			this.parentBufferRef.addContainer(this.messageLayer);
		}
		this.line[0].text = "string" == typeof this.textQueue[0] ? this.textQueue[0] : "";
		this.line[1].text = "string" == typeof this.textQueue[1] ? this.textQueue[1] : "";
		if (interactive) {
			if (undefined != window.activeDialog) { this.previousDialog = window.activeDialog; }
			window.activeDialog = this;
		} else {
			var me = this;
			setTimeout(function () { me.progressMessage(); }, 5000); // Not cleaned up properly yet
		}
	}

	deactivate () {
		var layerID = this.parentBufferRef.containerArray.indexOf(this.messageLayer);
		this.parentBufferRef.containerArray.splice(layerID,1);
		if (undefined != this.previousDialog) {
			window.activeDialog = this.previousDialog;
			this.previousDialog = undefined;
		} else {
			window.activeDialog = undefined;
		}
	}

	controls (e) {
		this.progressMessage();
	}
}