using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class SimplePlayerController : MonoBehaviour
{
    [Header("Movement")]
    public float moveSpeed = 4.5f;
    public float jumpForce = 1.2f;
    public float gravity = -18f;

    [Header("Look")]
    public Camera playerCamera;
    public float mouseSensitivity = 2.2f;
    public float minPitch = -75f;
    public float maxPitch = 75f;

    private CharacterController characterController;
    private Vector3 verticalVelocity;
    private float pitch;
    private bool inputEnabled = true;

    private void Awake()
    {
        characterController = GetComponent<CharacterController>();

        if (playerCamera == null)
            playerCamera = GetComponentInChildren<Camera>();
    }

    private void Start()
    {
        SetInputEnabled(true);
    }

    private void Update()
    {
        if (!inputEnabled)
            return;

        Look();
        Move();
    }

    public void SetInputEnabled(bool enabled)
    {
        inputEnabled = enabled;

        if (!enabled)
            verticalVelocity = Vector3.zero;

        Cursor.visible = !enabled;
        Cursor.lockState = enabled ? CursorLockMode.Locked : CursorLockMode.None;
    }

    private void Look()
    {
        float yaw = Input.GetAxis("Mouse X") * mouseSensitivity;
        float pitchDelta = Input.GetAxis("Mouse Y") * mouseSensitivity;

        transform.Rotate(Vector3.up * yaw);
        pitch = Mathf.Clamp(pitch - pitchDelta, minPitch, maxPitch);

        if (playerCamera != null)
            playerCamera.transform.localEulerAngles = new Vector3(pitch, 0f, 0f);
    }

    private void Move()
    {
        bool grounded = characterController.isGrounded;
        if (grounded && verticalVelocity.y < 0f)
            verticalVelocity.y = -2f;

        float horizontal = Input.GetAxis("Horizontal");
        float vertical = Input.GetAxis("Vertical");
        Vector3 move = transform.right * horizontal + transform.forward * vertical;

        if (move.sqrMagnitude > 1f)
            move.Normalize();

        characterController.Move(move * (moveSpeed * Time.deltaTime));

        if (grounded && Input.GetKeyDown(KeyCode.Space))
            verticalVelocity.y = Mathf.Sqrt(jumpForce * -2f * gravity);

        verticalVelocity.y += gravity * Time.deltaTime;
        characterController.Move(verticalVelocity * Time.deltaTime);
    }
}