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

public class LeverController : MonoBehaviour
{
    private Transform pivot; //The lever will use a pivot point
    private Transform grabHand; // ONLY ONE HAND WORKS RIGHT NOW. NEED A SOLUTION!
    private bool leverGrabbed;

    private bool eventCalled;

    private Vector3 handDelta;
    private Vector3 lastPosition;

    [SerializeField]
    private UnityEvent onUp;
    [SerializeField]
    private UnityEvent onDown;

    public float minAngle = 20f;
    public float maxAngle = 75f;

    void Awake()
    {
        pivot = transform.parent;
        leverGrabbed = false;
        pivot.eulerAngles = new Vector3(pivot.eulerAngles.x, pivot.eulerAngles.y, minAngle);
    }

    void Update()
    {
        if (leverGrabbed)
        {
            handDelta = lastPosition - grabHand.position; //The vector of hand movement between frames
            pivot.RotateAround(pivot.position, pivot.forward, 200 * (handDelta.y));

            if(pivot.eulerAngles.z < minAngle)
            {
                pivot.eulerAngles = new Vector3(pivot.rotation.x, pivot.rotation.y, minAngle);
                if (!eventCalled)
                {
                    onUp.Invoke();
                    eventCalled = true;
                }
            } 
            else if(pivot.eulerAngles.z > maxAngle)
            {
                pivot.eulerAngles = new Vector3(pivot.rotation.x, pivot.rotation.y, maxAngle);
                if (!eventCalled)
                {
                    onDown.Invoke();
                    eventCalled = true;
                }
            }

            lastPosition = grabHand.position;
        }
    }

    public void GrabLever(Transform hand)
    {
        leverGrabbed = !leverGrabbed;
        grabHand = hand;
        handDelta = Vector3.zero;
        lastPosition = grabHand.position;
        eventCalled = false;
    }

    
}