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

public class Flipper : MonoBehaviour
{
    // Start is called before the first frame update
    [SerializeField]
    private float swingSpeed = 0.35f;
    [SerializeField]
    private float swingPower = 30f;
    [SerializeField]
    private float swingDistance = 45f;
    [SerializeField]
    private bool leftSide = false;
    [SerializeField]
    private KeyCode keyPress = KeyCode.Space;

    private Quaternion startRotation;
    private Quaternion endRotation;
    private float currentProgress;

    enum FlipperState
    {
        Idle,
        Swinging,
        Returning,
    }
    private FlipperState currentState = FlipperState.Idle;

    void Start()
    {
        startRotation = transform.rotation;

        if( leftSide )
        {
            swingDistance = -swingDistance;

        }
        endRotation = Quaternion.Euler( new Vector3( 0, startRotation.eulerAngles.y + swingDistance, 0 ) );
    }

    // Update is called once per frame
    void Update()
    {
        if( Input.GetKeyDown( keyPress ) )
        {
            if( currentState != FlipperState.Idle )
            {
                Debug.Log( "Cannot Swing Flipper, already in Swinging state" );

            }
            else
            {
                StartSwing();
            }
        }
        if( currentState == FlipperState.Swinging )
        {

            currentProgress += Time.deltaTime;
            //Debug.Log( "Swinging " + currentProgress );
            //transform.rotation = Quaternion.Lerp( startRotation, endRotation, currentProgress/ swingSpeed );
            if( currentProgress >= swingSpeed )
            {
                currentState = FlipperState.Returning;
                currentProgress = 0;
            }
        }
        else if( currentState == FlipperState.Returning )
        {
            currentProgress += Time.deltaTime;
            //Debug.Log( "Returning " + currentProgress );
            //transform.rotation = Quaternion.Lerp( endRotation, startRotation, currentProgress / swingSpeed );
            if( currentProgress >= swingSpeed )
            {
                currentState = FlipperState.Idle;
                currentProgress = 0;
            }
        }
    }

    private void StartSwing()
    {
        currentState = FlipperState.Swinging;
        currentProgress = 0;
        GetComponent<Rigidbody>().AddTorque( Vector3.up * swingPower );


    }
}