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

public class Sliding : MonoBehaviour
{
    [Header("References")]
    public Transform orientation;
    public Transform playerObj;
    private Rigidbody rb;
    private PlayerMovement pm;
    PlayerStamina playerStamina;
    [Header("Sliding")]
    public float maxSlideTime;
    public float slideForce;
    private float slideTimer;

    

    public float slideYScale;
    private float startYScale;

    [Header("Input")]
    public KeyCode slideKey = KeyCode.LeftControl;
    private float horizontalInput;
    private float verticalInput;


    public float slideStaminaCost = 20;

    private void Start()
    {
        rb = GetComponent<Rigidbody>();
        pm = GetComponent<PlayerMovement>();
        playerStamina = GetComponent<PlayerStamina>();

        startYScale = playerObj.localScale.y;


    }

    private void Update()
    {
        horizontalInput = Input.GetAxisRaw("Horizontal");
        verticalInput = Input.GetAxisRaw("Vertical");

        if (Input.GetKeyDown(slideKey) && (horizontalInput != 0 || verticalInput != 0))
            StartSlide();

        if (Input.GetKeyUp(slideKey) && pm.sliding)
            StopSlide();
    }

    private void FixedUpdate()
    {
        if (pm.sliding)
            SlidingMovement();
    }



    private void StartSlide()
    {

        if (!playerStamina.DecreaseByChunk(slideStaminaCost))
        {
            return;
        }
        pm.sliding = true;

        playerObj.localScale = new Vector3(playerObj.localScale.x, slideYScale, playerObj.localScale.z);
        rb.AddForce(Vector3.down * 5f, ForceMode.Impulse);

        slideTimer = maxSlideTime;
    }

    private void SlidingMovement()
    {
        playerStamina.DecreaseStamina();

        Vector3 inputDirection = orientation.forward * verticalInput + orientation.right * horizontalInput;

        if(!pm.OnSlope() || rb.velocity.y > -0.1f)
        {
            rb.AddForce(inputDirection.normalized * slideForce, ForceMode.Force);
            slideTimer -= Time.deltaTime;
        }

        else
        {
            rb.AddForce(pm.GetSlopeMoveDirection(inputDirection) * slideForce, ForceMode.Force);
        }
        

        if (slideTimer <= 0)
            StopSlide();
    }

    private void StopSlide()
    {
        pm.sliding = false;

        playerObj.localScale = new Vector3(playerObj.localScale.x, startYScale, playerObj.localScale.z);
    }



}