class Copier : Item {

    static val READY = 0
    static val DONE = 1
    static val JAMMED = 2

    // The number of items that can be copied
    @Attribute
    var times = 3

    // The number of copies to make of each item.
    @Attribute
    var copies = 1

    var copied = 0

    var state = 0

    var previousOriginal : Item = null

    var previousCopy : Item = null


    override fun myTurn() {

        val above = lookNorth()

        if ( times <= 0 ) return

        if ( square.occupant != null ) return // Copy being made still.

        if ( state == READY ) {

            if ( !above.isEmpty() && above.copyable() && !above.isMoving() ) {

                val copyA = above.item().actor.costume.createChild( "copy" )
                val copy = copyA.role as Movable

                copyA.x = actor.x
                copyA.y = actor.y

                val side = lookEast()
                if ( side == previousCopy ) return

                if ( side.isEmpty() ) {

                    copyA.stage = actor.stage
                    square.addOccupant( copy )
                    copy.replaceAction( Movement( copy, 1, 0, 8 ) )
                    previousOriginal = above.item()
                    previousCopy = copy
                    copied ++
                    if ( copied >= copies ) {
                        times --
                        copied = 0
                        state = DONE
                    }

                } else {
                    state = JAMMED
                    if ( ! isTalking() ) {
                        speak( "Paper Jam\nCheck output tray", 3 )
                    }
                }

            } else {
                // The item to copy moved out of the way before we had a chance to make copies.
                if ( copied > 0 ) {
                    copied = 0
                    times --
                }
            }

        } else if (state == DONE) {
            if (!above.isMoving() && (above != previousOriginal)) {
                state = READY
                copied = 0
            }

        } else if (state == JAMMED ) {
            if ( lookEast().isEmpty() ) {
                state = READY
            } else {
                if (!above.isMoving() && (above != previousOriginal)) {
                    state = READY
                }
            }
        }
    }
    
}