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using System.Threading;
using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerController : MonoBehaviour
{
    [Header("Movement")]
    public float MovementAcceleration;
    public float MovementDrag;

    [Header("Dash")]
    public float DashSpeed;
    public float DashDuration; 
    public float DashSlowdown;
    public Key DashKey = Key.Space;
    public float MaxDashFlash;
    public float DashCooldown;
    public float CurrentDashCooldown;

    private float xVelocity;
    private float yVelocity;

    private float xInput;
    private float yInput;

    public bool isDashing;
    private float dashTimer;
    private Vector2 dashDirection;

    private SpriteRenderer playerSprite;
    private Color originalColor;

    void Start()
    {
        playerSprite = GetComponentInChildren<SpriteRenderer>();
        originalColor = playerSprite.color;
    }

    void Update()
    {
        HandleInputs();
        HandleMovement();

        float brightness = Mathf.Lerp(1f, MaxDashFlash, dashTimer / DashDuration);
        playerSprite.color = originalColor * brightness;



        if (CurrentDashCooldown > 0)
        {
            CurrentDashCooldown -= Time.deltaTime;
        } else { CurrentDashCooldown = 0; }
    }

    private void HandleInputs()
    {
        if (isDashing)
            return;

        xInput = (Keyboard.current.dKey.isPressed ? 1f : 0f)
               - (Keyboard.current.aKey.isPressed ? 1f : 0f);

        yInput = (Keyboard.current.wKey.isPressed ? 1f : 0f)
               - (Keyboard.current.sKey.isPressed ? 1f : 0f);

        if (Keyboard.current[DashKey].wasPressedThisFrame && (xInput != 0 || yInput != 0) && CurrentDashCooldown <= 0)
        {
            isDashing = true;
            dashTimer = DashDuration;
            CurrentDashCooldown = DashCooldown;

            dashDirection = new Vector2(xInput, yInput).normalized;
        }

    }

    private void HandleMovement()
    {
        if (isDashing)
        {
            if (dashTimer > 0)
            {
                xVelocity = dashDirection.x * DashSpeed;
                yVelocity = dashDirection.y * DashSpeed;
                dashTimer -= Time.deltaTime;
            }
else
{
    float slowdownFactor = 1 - DashSlowdown * Time.deltaTime;

    xVelocity *= slowdownFactor;
    yVelocity *= slowdownFactor;

    if (new Vector2(xVelocity, yVelocity).magnitude < 10f)
        isDashing = false;
}

        }
        else
        {
            xVelocity += xInput * MovementAcceleration;
            yVelocity += yInput * MovementAcceleration;

            xVelocity *= 1 - MovementDrag * Time.deltaTime;
            yVelocity *= 1 - MovementDrag * Time.deltaTime;
        }

        Vector2 movement = new Vector2(xVelocity, yVelocity) * Time.deltaTime;
        transform.position += (Vector3)movement;
    }
}