using UnityEngine;
using System.Collections;

public class thirdPersonController : MonoBehaviour {

	public string CAMERA_INPUT_X;
	public string CAMERA_INPUT_Y;
	public string MOVEMENT_INPUT_X;
	public string MOVEMENT_INPUT_Y;
	public string JUMP_INPUT;

	public Camera camera;
	public GameObject cameraCentre;

	public float cameraSpeedX = 250.0f;
	public float cameraSpeedY = 120.0f;
	public float cameraDistance = 10.0f;
	public bool active = true;

	public float movementSpeed;
	public float jumpHeight;
	public float grip;
	public float maxVelocity;
	public float maxAirVelocity;
	private float curMaxVelocity;

	public float cameraX;
	public float cameraY;
	private float movementX;
	private float movementY;

	private bool grounded;

	private Rigidbody rigidbody;




	
	// Use this for initialization
	void Start () {

		rigidbody = GetComponent<Rigidbody> ();

		cameraX = camera.transform.eulerAngles.x;
		cameraY = camera.transform.eulerAngles.y;

	}

	void FixedUpdate(){

		RaycastHit hit;

		Ray ray = new Ray(transform.position, -Vector3.up);
		

		if (Physics.Raycast (ray, out hit, 1.3f)) {
			grounded = true;
			curMaxVelocity = maxVelocity;
			if (hit.collider.tag == "moveable")
				matchVelocity(hit.collider);

		} else {
			grounded = false;
			curMaxVelocity = maxAirVelocity;
		}
		if (active) {

			applyMovement ();

			Vector3 checkVelocity = rigidbody.velocity;
			//Debug.Log ("VelMag: " + checkVelocity.magnitude);
			if (checkVelocity.magnitude > maxVelocity){
				float vertVelo = checkVelocity.y;
				checkVelocity = Vector3.ClampMagnitude (checkVelocity, curMaxVelocity);
				checkVelocity.y = vertVelo;
				//Debug.Log (checkVelocity);
				rigidbody.velocity = checkVelocity;
			}

			transform.rotation = Quaternion.Euler (new Vector3 (0.0f, camera.transform.rotation.eulerAngles.y, 0.0f));

			applyGrip();

			applyJump (jumpHeight);
		}



		}


	//}
	
	// Update is called once per frame
	void LateUpdate () {
		if (active) {
			cameraX += Input.GetAxis (CAMERA_INPUT_X) * cameraSpeedX * 0.02f;
			cameraY += Input.GetAxis (CAMERA_INPUT_Y) * cameraSpeedY * 0.02f;
		}
		Quaternion cameraRotation = Quaternion.Euler (cameraY, cameraX, 0.0f);
		Vector3 cameraPosition = cameraRotation * new Vector3(0.0f, 0.0f, -cameraDistance) + cameraCentre.transform.position;

		camera.transform.rotation = cameraRotation;
		camera.transform.position = cameraPosition;

	
	}

	private void applyMovement(){
		movementX = Input.GetAxis (MOVEMENT_INPUT_X);
		movementY = Input.GetAxis (MOVEMENT_INPUT_Y);
		
		Vector3 velocity = new Vector3 (movementX, 0.0f, movementY) * movementSpeed * Time.deltaTime;
		//Debug.Log (velocity);
		velocity = Quaternion.Euler (0.0f, camera.transform.rotation.eulerAngles.y, 0.0f) * velocity;
		
		rigidbody.AddForce (velocity);
	}

	private void applyJump(float power){
		if (grounded) {
			if (Input.GetButtonDown (JUMP_INPUT)) {
				rigidbody.AddRelativeForce (0, power, 0);
			}
		}

	}

	private void matchVelocity(Collider target){

		Debug.Log ("matching velocity");

		//Vector3 velocity = rigidbody.velocity;
		//velocity = target.attachedRigidbody.velocity;

		//rigidbody.velocity = velocity;

			//transform.parent = target.transform;
			//rigidbody.isKinematic = true;
	}


	public void applyGrip(){
		float localVelX = transform.InverseTransformDirection (rigidbody.velocity).x;
		float localVelZ = transform.InverseTransformDirection (rigidbody.velocity).z;
		//Debug.Log ("velocity.y: " + localVelZ);

		if (grounded && Mathf.Abs(movementX) < 0.8f ) {
			rigidbody.AddForce(transform.right * -localVelX * grip);

			if (Mathf.Abs(movementY) < 0.5f && Mathf.Abs(localVelZ )> 1.0f){
				rigidbody.AddForce(-transform.forward * grip * localVelZ  );
			}

		}




	}


}