using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class NewCar : MonoBehaviour
{
	// Car values
    [SerializeField] private float movementForce = 18000f;          			// Force used to move the car
	private float speedForce;
    [SerializeField] private float maxSpeedValue;
    [SerializeField] private float accelerationPower;
    [Space]

	// Hook values
	[SerializeField] private GameObject hookPrefab;                 			// Prefab of the hook that is going to be thrown
	[SerializeField] private Transform[] hookPoint = new Transform[2];			// Hook points relative positions
	GameObject travellingHook;                                      			// The hook that got isntantiated | To be removed later when the key is released
	private bool hookThrown = false;



	// Components / Scripts
	DistanceJoint3D distanceJoint;
	ConstantForce myConstantForce;

    private float multiplier;

    void Start()
	{
        multiplier = 1;
		distanceJoint = this.GetComponent<DistanceJoint3D>();
		myConstantForce = this.GetComponent<ConstantForce>();
	}

	void Update()
	{
		// Movement | Forward and backward forces for the car
        if (Input.GetKey(KeyCode.W))
        {
            if (multiplier<maxSpeedValue)
                multiplier += (float)(accelerationPower/100 * Time.deltaTime);
            //myConstantForce.relativeForce = new Vector3(0, 0, movementForce * multiplier);
            //Debug.Log(myConstantForce.relativeForce);
            speedForce =Mathf.Pow(movementForce,multiplier);
        }
        else if (Input.GetKey(KeyCode.S))
        {
            if (multiplier < maxSpeedValue)
                multiplier += (float)(accelerationPower / 100 * Time.deltaTime);
            speedForce = -Mathf.Pow(movementForce, multiplier);
        }
        else
        {
            multiplier = 1;
            speedForce = 0;
        }

		myConstantForce.relativeForce = new Vector3(0, 0, speedForce);

		// Hook launch
		if (Input.GetKeyDown(KeyCode.LeftArrow) && !hookThrown)
		{
			distanceJoint.relativePosition = hookPoint[1];
			AssignHook(hookPoint[0], -1);
		}
		else if (Input.GetKeyDown(KeyCode.RightArrow) && !hookThrown)
		{
			distanceJoint.relativePosition = hookPoint[0];
			AssignHook(hookPoint[1], 1);
		}
		else if (Input.GetKeyUp(KeyCode.LeftArrow) || Input.GetKeyUp(KeyCode.RightArrow))
        {
            distanceJoint.RemoveHook();
            Destroy(travellingHook);

            hookThrown = false;
        }
	}

	private void AssignHook(Transform _launchPosition, int _carSide)
	{
		travellingHook = Instantiate(hookPrefab, _launchPosition.position, Quaternion.Euler(this.transform.eulerAngles));
        HookTraveller travellingHookController = travellingHook.GetComponent<HookTraveller>();
        travellingHookController.carJoint = distanceJoint;
        travellingHookController.hookLaunchPosition = _launchPosition;
        travellingHookController.carSide = _carSide;

		hookThrown = true;
	}

}