package io.sarl.demos.sierpinski.gui

import io.sarl.lang.core.EventListener
import java.util.UUID
import io.sarl.util.OpenEventSpace
import javafx.fxml.FXML
import javafx.scene.canvas.Canvas
import javafx.scene.control.Button
import io.sarl.lang.core.Event
import io.sarl.demos.sierpinski.agents.Fractal
import io.janusproject.Boot
import io.sarl.demos.sierpinski.objects.Square
import io.sarl.demos.sierpinski.events.Multiply
import io.sarl.demos.sierpinski.objects.Positions
import javafx.scene.canvas.GraphicsContext
import javafx.animation.PauseTransition
import javafx.util.Duration
import javafx.scene.paint.Color
import io.sarl.demos.sierpinski.objects.Vector2D
import io.sarl.lang.core.Address
import io.sarl.demos.sierpinski.events.Exit

class FXMLViewerController implements EventListener {
	
	static class Launcher {
		static def main(screen: Square, controller: FXMLViewerController){
			Boot::offline = true
			Boot::startJanus(typeof(Fractal), screen, controller.positions, controller)
			controller.draw
		}
	}

	private val id: UUID = UUID.randomUUID()

	private var positions: Positions = new Positions
	
	private var ispace: OpenEventSpace
	private var setuped = false
	
	@FXML private var drawZone: Canvas
	@FXML private var multiplyButton: Button
	
	@FXML public def exitApplication(){
		if (setuped){
			var e = new Exit()
			this.multiplyButton.setDisable(true)
			e.source = new Address(ispace.spaceID, id)
			this.ispace.emit(e)
		}
	}
	
	@FXML protected def actionMultiply() {
		if (!setuped){
			Launcher.main(
				new Square(new Vector2D(0.0, 0.0),
					600.0
				), this )
			setuped = true
		}
		var m = new Multiply
		m.source = new Address(ispace.spaceID, id)
		this.ispace.emit(m)
	}
	
	public def getPositions(){
		return this.positions
	}
	
	private def draw(){
		var gc: GraphicsContext = drawZone.graphicsContext2D
		var wait: PauseTransition = new PauseTransition(Duration.seconds(0.03))
		
		gc.setStroke(Color.ORANGERED)
		gc.setLineWidth(3)
		
		wait.setOnFinished [ e | 
			try {
				gc.clearRect(0, 0, drawZone.width, drawZone.height)
				positions.triangles.forEach[ t | 
					gc.strokeLine(t.bottomLeft.x, t.bottomLeft.y, t.top.x, t.top.y)
					gc.strokeLine(t.top.x, t.top.y, t.bottomRight.x, t.bottomRight.y)
					gc.strokeLine(t.bottomRight.x, t.bottomRight.y, t.bottomLeft.x, t.bottomLeft.y)
				]
			} catch (exception: Exception){}
			wait.playFromStart
		]
		wait.play
	}
	
	public def setGUISpace(ispace: OpenEventSpace){
		this.ispace = ispace
		this.ispace.register(this)
	}
	
	@Override
	public def getID(): UUID {
		return this.id
	}
	
	@Override
	public def receiveEvent(ievent: Event){
		
	}
}