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

public class PlayerMovement : MonoBehaviour
{
    private float horizontal;
    private float speed = 6f;
    private float jumpingPower = 6.5f;
    private float DoublejumpingPower = 5.5f;
    public float fallMultiplier = 3.5f;
    public float lowJumpMultiplier = 2f;
    private bool isFacingRight = true;

    private bool isWallSliding;
    private float wallSlidingSpeed = 2f;

    private bool isWallJumping;
    private float wallJumpingDirection;
    private float wallJumpingTime = 0.2f;
    private float wallJumpingCounter;
    private float wallJumpingDuration = 0.4f;
    private float wallJumps = 0f;
    private Vector2 wallJumpingPower = new Vector2(4f, 6f);

    [SerializeField] private Rigidbody2D rb;
    [SerializeField] private Transform groundCheck;
    [SerializeField] private LayerMask groundLayer;
    [SerializeField] private Transform wallCheck;
    [SerializeField] private LayerMask wallLayer;
    [SerializeField] bool DoubleJumpReady;

    private void Update()
    {

        if (rb.velocity.y < 0)
        {
            rb.velocity += Vector2.up * Physics2D.gravity.y * (fallMultiplier - 1) * Time.deltaTime;
        }
        else if (rb.velocity.y > 0 && !Input.GetButton("Jump"))
        {
            rb.velocity += Vector2.up * Physics2D.gravity.y * (lowJumpMultiplier - 1) * Time.deltaTime;
        }


        horizontal = Input.GetAxisRaw("Horizontal");

        if (Input.GetButtonDown("Jump") && IsGrounded())
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpingPower);
        }
        else if (Input.GetButtonDown("Jump") && DoubleJumpReady)
        {
            
            rb.velocity = new Vector2(rb.velocity.x, DoublejumpingPower);
            DoubleJumpReady = false;
        }
            

            if (Input.GetButtonUp("Jump") && rb.velocity.y > 0f)
        {
            rb.velocity = new Vector2(rb.velocity.x, rb.velocity.y * 0.5f);
        }

        WallSlide();
        WallJump();

        if (!isWallJumping)
        {
            Flip();
        }

        if (!IsGrounded())
        {
            speed = 5f;
        }

        if (IsGrounded())
        {
            speed = 6f;
            wallJumps = 0f;
            DoubleJumpReady = true;
        }
    }

    private void FixedUpdate()
    {
        if (!isWallJumping)
        {
            rb.velocity = new Vector2(horizontal * speed, rb.velocity.y);
        }
    }

    private bool IsGrounded()
    {
        return Physics2D.OverlapCircle(groundCheck.position, 0.2f, groundLayer);
    }

    private bool IsWalled()
    {
        return Physics2D.OverlapCircle(wallCheck.position, 0.2f, wallLayer);
    }

    private void WallSlide()
    {
        if (IsWalled() && !IsGrounded() && horizontal != 0f)
        {
            isWallSliding = true;
            rb.velocity = new Vector2(rb.velocity.x, Mathf.Clamp(rb.velocity.y, -wallSlidingSpeed, float.MaxValue));
        }
        else
        {
            isWallSliding = false;
        }
    }

    private void WallHold()
    {
        if (IsWalled() && !IsGrounded() && horizontal == 0f)
        {
            
            rb.velocity = new Vector2(rb.velocity.x, Mathf.Clamp(rb.velocity.y, -wallSlidingSpeed, float.MaxValue));
        }
        else
        {
            isWallSliding = false;
        }
    }


    private void WallJump()
    {
        if (isWallSliding)
        {
            isWallJumping = false;
            wallJumpingDirection = -transform.localScale.x;
            wallJumpingCounter = wallJumpingTime;

            CancelInvoke(nameof(StopWallJumping));
        }
        else
        {
            wallJumpingCounter -= Time.deltaTime;
        }

        if (Input.GetButtonDown("Jump") && wallJumpingCounter > 0f && wallJumps < 4f)
        {
            wallJumps++;
            isWallJumping = true;
            rb.velocity = new Vector2(wallJumpingDirection * wallJumpingPower.x, wallJumpingPower.y);
            wallJumpingCounter = 0f;

            if (transform.localScale.x != wallJumpingDirection)
            {
                isFacingRight = !isFacingRight;
                Vector3 localScale = transform.localScale;
                localScale.x *= -1f;
                transform.localScale = localScale;
            }

            Invoke(nameof(StopWallJumping), wallJumpingDuration);
        }
    }

    private void StopWallJumping()
    {
        isWallJumping = false;
    }

    private void Flip()
    {
        if (isFacingRight && horizontal < 0f || !isFacingRight && horizontal > 0f)
        {
            isFacingRight = !isFacingRight;
            Vector3 localScale = transform.localScale;
            localScale.x *= -1f;
            transform.localScale = localScale;
        }
    }
}