/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A superclass for states powering the dispenser.

*/

import SpriteKit

import GameplayKit

class DispenserState: GKState {

    // MARK: Properties

    /// A reference to the game scene, used to alter sprites.

    let game: GameScene

    /// The name of the node in the game scene that is associated with this state.

    let associatedNodeName: String

    /// Convenience property to get the state's associated sprite node.

    var associatedNode: SKSpriteNode? {

        return game.childNode(withName: "//\(associatedNodeName)") as? SKSpriteNode

    }

    // MARK: Initialization

    init(game: GameScene, associatedNodeName: String) {

        self.game = game

        self.associatedNodeName = associatedNodeName

    }

    // MARK: GKState overrides

    /// Highlights the sprite representing the state.

    override func didEnter(from previousState: GKState?) {

        guard let associatedNode = associatedNode else { return }

        associatedNode.color = SKColor.lightGray

    }

    /// Unhighlights the sprite representing the state.

    override func willExit(to nextState: GKState) {

        guard let associatedNode = associatedNode else { return }

        associatedNode.color = SKColor.darkGray

    }

    // MARK: Methods

    /// Changes the dispenser's indicator light to the specified color.

    func changeIndicatorLightToColor(_ color: SKColor) {

        let indicator = game.childNode(withName: "//indicator") as! SKSpriteNode

        indicator.color = color

    }

}