class Controller
{
	#game;
	#drawer;
	#colorsBank = ['black','silver','gray','maroon','red','purple','fuchsia','green','lime','olive','yellow','navy','blue','teal','aqua'];
	#historyHandler;
	
	constructor()
	{
		this.initializeGame();
	}

	drawer()
	{
		return this.#drawer
	}
	
	initializeGame() {
		let params = this.gatherMenuValues();
		
		this.#game = new Game(params.TUBESNUMBERS, params.TUBESLEVELS);
		this.#drawer = new Drawer(params.PADDING, params.SCALE, this.#game);
		this.#historyHandler = new HistoryHandler();

		this.ui = new UI(800, 600);
		this.lastTime = millis();
		
		this.initializeColorTubes(params.TUBESLEVELS - 1);
		
		this.needUpdate = true;
	}

	gatherMenuValues()
	{
		let inputTubesNumbers = parseInt(document.getElementById("tbNumber").value);
		let inputTubesLevels = parseInt(document.getElementById("tbLevel").value);
		let inputScale = parseInt(document.getElementById("scale").value);
		let inputPadding = parseInt(document.getElementById("padding").value);
		
		return {
			TUBESNUMBERS: inputTubesNumbers,
			TUBESLEVELS: inputTubesLevels,
			SCALE: inputScale,
			PADDING: inputPadding
		};
	}
	
	initializeColorTubes(LayersPerTube)
	{
		let nbTubes = this.#game.tubesNumber() - 1;
		let allColors = [];
		
		for (let i = 0; i < nbTubes; i++)
		{
			let coloridx = i % this.#colorsBank.length;
			for (let times = 0; times < LayersPerTube; times++)
			{
				allColors.push(this.#colorsBank[coloridx]);
			}
		}
		
		for (let index = allColors.length - 1; index >= 0; index--) {
			let randomIndex = Math.floor(Math.random() * (index + 1));
			let tubeIndex = Math.floor(index / LayersPerTube);
			
			this.#game.tubeAt(tubeIndex).addColorLayer(allColors[randomIndex]);
			
			allColors[randomIndex] = allColors[index];
		}
	}
	
	clickTube(tubeIndex)
	{
		let _clickedTube = this.#game.tubeAt(tubeIndex);
		let _selectedTube = this.#game.selectedTube();

		if (_clickedTube == null) return;
		
		if (_clickedTube == _selectedTube)
		{
			this.#drawer.removeSelectedEffect(this.#game.selectedTubeIndex());
			this.#game.unselectTube();
		}
		else if (this.canPourInto(_selectedTube, _clickedTube))
		{
			this.pourColorInto(_selectedTube, _clickedTube);
			this.#drawer.removeSelectedEffect(this.#game.selectedTubeIndex());
			this.#game.unselectTube();
		}
		else if (!_clickedTube.isEmpty())
		{
			if (_selectedTube != null) this.#drawer.removeSelectedEffect(this.#game.selectedTubeIndex());
			this.#drawer.applySelectedEffect(tubeIndex);
			this.#game.selectTubeAt(tubeIndex);
		}
	}
	
	canPourInto(sourceTube, targetTube)
	{
		return sourceTube != null && targetTube != null
			&& sourceTube != targetTube
			&& (targetTube.isEmpty() || sourceTube.peekTopColor() == targetTube.peekTopColor())
			&& !targetTube.isFull();
	}
	
	pourColorInto(sourceTube, targetTube)
	{
		let times = 0;

		do
		{
			targetTube.addColorLayer(sourceTube.removeColorLayer());
			times++;
		} while (this.canPourInto(sourceTube, targetTube) && !targetTube.isComplete());

		this.#historyHandler.log(sourceTube, targetTube, times);
		
		//this.checkTubeCompletion(sourceTube);
		//this.checkTubeCompletion(targetTube);
	}
	
	checkTubeCompletion(tube)
	{
		if (tube.isComplete())
		{
			//this.#game.removeTube(tube);
			this.checkGameCompletion();
		}
	}
	
	checkGameCompletion()
	{
		if (this.#game.tubesNumber() == 1 && this.#game.tubeAt(0).isEmpty())
		{
			this.#game.clean();
		}
	}

	undoPreviousAction()
	{
		this.#historyHandler.restore();
	}
	
	mousePressed(e) 
	{
		let clickedTubeId = this.#drawer.getTubeIdAt(mouseX, mouseY);
		this.clickTube(clickedTubeId);
		
		this.needUpdate = true;
	}
	
	runLoop()
	{
		let timeDelta = millis() - this.lastTime;
		// peut-être pas nécessaire de limiter le framerate
		if (timeDelta < 1000 / 60)
			return;
		this.lastTime = millis();
		
		const steps = [
			(this.needUpdate || this.#game.isCompleted) && this.drawGame,
			this.#game.isComplete() && this.drawUI
		]

		steps.forEach(step => step && step.call(this));
	}

	drawGame()
	{
		this.#drawer.draw();
	}

	drawUI()
	{
		this.ui.drawWinView();
	}
}