package isac.gui.mawen.editor

import java.awt.Rectangle

import java.awt.Graphics

import isac.gui.mawen.syntax.Ast

import isac.gui.mawen.syntax.Ast._

/**

 * Holds all data required to draw the <code>Ast</code>.

 * The "Empty*Box"es initalise respective data before calculation.

 */

object Box {

  sealed abstract class Box(val ast: Ast)

  class EmptyBox(val level: Int, val x0: Int, val y0: Int, override val ast: Ast) extends Box(ast) {

    def apply (level: Int, x0: Int, y0: Int, ast: Ast) = new EmptyBox(level, x0, y0, ast)

    def toEmptyBox() = new EmptyBox(level, x0, y0, ast)

    def toEmptyBox(ast: Ast) = new EmptyBox(level, x0, y0, ast)

    def toEmptyBox(x: Int, y: Int, ast: Ast) = new EmptyBox(level, x, y, ast)

  }

  case class EmptyLeafOpBox(override val level: Int, override val x0: Int, override val y0: Int, override val ast: Ast) extends EmptyBox(level, x0, y0, ast)

  case class EmptyUniOpBox(override val level: Int, override val x0: Int, override val y0: Int, param: Ast, override val ast: Ast) extends EmptyBox(level, x0, y0, ast)

  case class EmptyBinOpBox(override val level: Int, override val x0: Int, override val y0: Int, operator: Ast, paraml: Ast, paramr: Ast, override val ast: Ast) extends EmptyBox(level, x0, y0, ast)

  case class DrawBox(name: String, val level: Int, val x: Int, val y: Int, val width: Int, val height: Int, x0 : Int, y0 : Int, override val ast: Ast) extends Box(ast) {

    var children : List[DrawBox] = List.empty[DrawBox]

    var isBoxed: Boolean  = false

    var colorCode : Int = 0

    var boxedElement : Int = 0

  }

  def isLeaf(b: DrawBox) : Boolean = b.children.length == 0

  def Contains(parent: DrawBox, box: DrawBox) : Boolean  =

    box == parent || parent.children.exists( y => Contains(y, box))

  def draw(b: DrawBox, g: Graphics) : Unit = draw(b, g, true) 

  def draw(b: DrawBox, g: Graphics, withChildren: Boolean) : Unit = {

    g.drawRect(b.x, b.y - b.height, b.width, b.height)

    if (withChildren) b.children.foreach(draw(_,g))

  }

  def drawBox(b: DrawBox, g: Graphics) {

    if (b.isBoxed) {

      g.setColor(Settings.CollorMapping(b.colorCode))

      g.drawRect(b.x, b.y - b.height, b.width, b.height)

      g.setColor(java.awt.Color.BLACK)

    }

  }

  def BoxIn(b: DrawBox, rect: Rectangle) : Boolean = 

    rect.contains(b.x, b.y) || rect.contains(b.x + b.width, b.y) ||

    rect.contains(b.x, b.y + b.height) || rect.contains(b.x + b.width, b.y + b.height)

}