import SpriteKit
import CoreMotion

enum CollisionTypes: UInt32 {
  case player = 1
  case wall = 2
  case star = 4
  case rig = 3
}

final class GameScene: SKScene, SKPhysicsContactDelegate {
 private var player: SKSpriteNode!
 private var lastTouchPosition: CGPoint?
 private var motionManager: CMMotionManager?
 private var scoreLabel: SKLabelNode!
 private var score = 0 {
  didSet {
      scoreLabel.text = "Score: \(score)"
    }
  }
private var isGameOver = false
private var items = [String]()
private var teleportDestination = [CGPoint]()

override func didMove(to view: SKView) {
   createScoreLabel()
   loadLevel()
   createPlayer()
   physicsWorld.gravity = .zero
   physicsWorld.contactDelegate = self
  motionManager = CMMotionManager()
  motionManager?.startAccelerometerUpdates()
  let rightRect = CGRect(x: self.frame.size.width, y: 0, width: 1, height: self.frame.size.height)
  let right = SKNode()
  right.physicsBody = SKPhysicsBody(edgeLoopFrom: rightRect)
  self.addChild(right)
  right.name = "right"
   // right.physicsBody?.categoryBitMask = rightCategory
  right.physicsBody?.categoryBitMask = CollisionTypes.rig.rawValue
   right.physicsBody?.contactTestBitMask = CollisionTypes.player.rawValue
    right.physicsBody?.collisionBitMask = CollisionTypes.wall.rawValue
}

 override func update(_ currentTime: TimeInterval) {
  guard isGameOver == false else { return }
   #if targetEnvironment(simulator)
   if let lastTouchPosition = lastTouchPosition {
  let diff = CGPoint(x: lastTouchPosition.x - player.position.x, y: lastTouchPosition.y - player.position.y)
  physicsWorld.gravity = CGVector(dx: diff.x / 100, dy: diff.y / 100)
 }
 #else
  if let accelrometerData = motionManager?.accelerometerData {
   physicsWorld.gravity = CGVector(dx: accelrometerData.acceleration.x * 10, dy: accelrometerData.acceleration.y * 10)
 }
 #endif
/*
 if let accelerometerData = motionManager.accelerometerData {
 physicsWorld.gravity = CGVector(dx: accelerometerData.acceleration.y * -50, dy: accelerometerData.acceleration.x * 50)
 }
if let lastTouchPosition = lastTouchPosition {
 let diff = CGPoint(x: lastTouchPosition.x - player.position.x, y: lastTouchPosition.y - player.position.y)
   physicsWorld.gravity = CGVector(dx: diff.x / 200, dy: diff.y / 200)
}
 */
}
private func loadLevel() {
  let itm:CGFloat = frame.size.width/12
  guard let levelURL = Bundle.main.url(forResource: "level1", withExtension: "txt") else {
   fatalError("Could't find")
 }
guard let levelString = try? String(contentsOf: levelURL) else {
   fatalError("Could't load")
 }
 let lines = levelString.components(separatedBy: "\n")
  for (row, line) in lines.reversed().enumerated() {
    for (column, letter) in line.enumerated() {
     let position = CGPoint(x: (Int(itm) * column) + 16, y: (Int(itm) * row) + Int(self.frame.height) / 8)
     if letter == "a" {
     createBlock(in: position)
   }else if letter == "s" {
      createStar(in: position)
    }else if letter == "y" {
    createfild(in: position)
 }
 }
 }
}
private func createBlock(in position: CGPoint) {
  let node = SKSpriteNode(imageNamed: "Field0")
 node.name = "block"
  items.append(node.name!)
  node.position = position
  node.physicsBody = SKPhysicsBody(rectangleOf: node.size)
  node.physicsBody?.categoryBitMask = CollisionTypes.wall.rawValue
  node.physicsBody?.isDynamic = false
 addChild(node)
 node.setScale(1.05)
}
private func createScoreLabel() {
 scoreLabel = SKLabelNode(fontNamed: "AvenirNext-Bold")
  scoreLabel.text = "Score: 0"
  scoreLabel.horizontalAlignmentMode = .left
  scoreLabel.position = CGPoint(x: 50, y: 50)
  scoreLabel.zPosition = 2
  addChild(scoreLabel)
}
private func createPlayer() {
player = SKSpriteNode(imageNamed: "player")
 player.position = CGPoint(x: frame.size.width/12 + player.size.width * 0.38, y: frame.height - 270 )
 player.zPosition = 1
 player.physicsBody = SKPhysicsBody(circleOfRadius: player.size.width / 2)
 player.physicsBody?.allowsRotation = false
 player.physicsBody?.linearDamping = 0.8
 player.physicsBody?.categoryBitMask = CollisionTypes.player.rawValue
 player.physicsBody?.contactTestBitMask = CollisionTypes.star.rawValue
 player.physicsBody?.collisionBitMask = CollisionTypes.wall.rawValue
addChild(player)
 player.setScale(0.55)
}
 private func createStar(in position: CGPoint) {
   let node = SKSpriteNode(imageNamed: "star")
  node.name = "star"
  items.append(node.name!)
  node.physicsBody = SKPhysicsBody(circleOfRadius: node.size.width / 2)
  node.physicsBody?.isDynamic = false
  node.physicsBody?.categoryBitMask = CollisionTypes.star.rawValue
  node.physicsBody?.contactTestBitMask = CollisionTypes.player.rawValue
  node.physicsBody?.collisionBitMask = 0
  node.position = position
  addChild(node)
  node.setScale(0.5)
 }
private func createfild(in position: CGPoint) {
  let node = SKSpriteNode(imageNamed: "Field2")
  node.name = "fild"
  items.append(node.name!)
  node.physicsBody = SKPhysicsBody(circleOfRadius: node.size.width / 2)
  node.physicsBody?.isDynamic = false
  node.physicsBody?.categoryBitMask = CollisionTypes.rig.rawValue
 node.physicsBody?.contactTestBitMask = CollisionTypes.player.rawValue
  node.physicsBody?.collisionBitMask = 0
  node.position = position
 addChild(node)
  node.setScale(1.01)
 }
private func playerCollided(with node: SKNode) {
  if node.name == "star" {
    node.removeFromParent()
    score += 1
}
  if node.name == "fild" {
    node.removeFromParent()
    score += 3
  }
 }
 private func ballCollided(with node: SKNode) {
  if node.name == "right" {
   node.removeFromParent()
   let gameOverScene = GameScene(size: self.frame.size)
   self.view?.presentScene(gameOverScene)
 }
}
func didBegin(_ contact: SKPhysicsContact) {
 guard let nodeA = contact.bodyA.node else { return }
 guard let nodeB = contact.bodyB.node else { return }
  if nodeA == player {
     playerCollided(with: nodeB)
 } else if nodeB == player {
    playerCollided(with: nodeA)
    ballCollided(with: nodeA)
 }
 }
override func touchesBegan(_ touches: Set, with event: UIEvent?) {
 guard let touch = touches.first else { return }
  let location = touch.location(in: self)
  lastTouchPosition = location
 }
override func touchesMoved(_ touches: Set, with event: UIEvent?) {
   guard let touch = touches.first else { return }
   let location = touch.location(in: self)
   lastTouchPosition = location
}
override func touchesEnded(_ touches: Set, with event: UIEvent?) {
  lastTouchPosition = nil
  }
}