using UnityEngine;

[RequireComponent(typeof(CharacterController))]
public class SimplePlayerController : MonoBehaviour
{
    public PlayerStats playerStats;
    public CharacterController characterController;
    public Transform cameraTransform;

    [Header("Movement")]
    public float gravity = -25f;
    public float rotationSpeed = 12f;

    [Header("Camera")]
    public Vector3 cameraOffset = new Vector3(0f, 9f, -8f);
    public float cameraYaw = 45f;
    public float cameraSmooth = 12f;

    private float verticalVelocity;

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

        if (playerStats == null)
        {
            playerStats = GetComponent<PlayerStats>();
        }

        if (cameraTransform == null && Camera.main != null)
        {
            cameraTransform = Camera.main.transform;
        }
    }

    private void Update()
    {
        if (Input.GetMouseButton(1))
        {
            cameraYaw += Input.GetAxis("Mouse X") * 120f * Time.deltaTime;
        }

        Vector3 input = new Vector3(Input.GetAxisRaw("Horizontal"), 0f, Input.GetAxisRaw("Vertical"));
        input = Vector3.ClampMagnitude(input, 1f);

        Quaternion yawRotation = Quaternion.Euler(0f, cameraYaw, 0f);
        Vector3 moveDirection = yawRotation * input;

        if (characterController.isGrounded && verticalVelocity < 0f)
        {
            verticalVelocity = -1f;
        }

        verticalVelocity += gravity * Time.deltaTime;

        float speed = playerStats != null ? playerStats.MoveSpeed : 5f;
        Vector3 velocity = moveDirection * speed;
        velocity.y = verticalVelocity;
        characterController.Move(velocity * Time.deltaTime);

        if (moveDirection.sqrMagnitude > 0.001f)
        {
            Quaternion targetRotation = Quaternion.LookRotation(moveDirection, Vector3.up);
            transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
        }
    }

    private void LateUpdate()
    {
        if (cameraTransform == null)
        {
            return;
        }

        Quaternion yawRotation = Quaternion.Euler(0f, cameraYaw, 0f);
        Vector3 desiredPosition = transform.position + yawRotation * cameraOffset;
        cameraTransform.position = Vector3.Lerp(cameraTransform.position, desiredPosition, cameraSmooth * Time.deltaTime);
        cameraTransform.LookAt(transform.position + Vector3.up * 1.3f);
    }
}