using UnityEngine;
using Unheimlich.Managers;

namespace Unheimlich.Gameplay.Player
{
    /// <summary>
    /// Handles player movement, jumping, and gravity using CharacterController.
    /// Provides movement state information for other systems like camera head bob.
    /// </summary>
    [RequireComponent(typeof(CharacterController))]
    public class PlayerMovement : MonoBehaviour
{
    public static PlayerMovement Instance { get; private set; }

    [Header("Settings")]
    [SerializeField] private float _moveSpeed = 5f; 
    [SerializeField] private float _jumpForce = 10f;
    [SerializeField] private float _groundedGravity = -2f;

    public CharacterController CharacterController { get; private set; } 

    public bool IsMoving { get; private set; }

    private float _ySpeed; 
    private Vector3 _moveDirection;

    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(this);
            return;
        }
        Instance = this;

        CharacterController = GetComponent<CharacterController>(); 
    }

    private void Update()
    {
        if (!PlayerInputManager.IsInputEnabled || CharacterController == null)
            return; 

        HandleMovement(); 
    }

    private void HandleMovement()
    {
        Vector2 input = PlayerInputManager.Instance.MoveInput; 

        Vector3 forward = transform.forward * input.y; 
        Vector3 right = transform.right * input.x; 

        _moveDirection = forward + right; 
        _moveDirection = _moveDirection.normalized * _moveSpeed; 

        IsMoving = _moveDirection.magnitude > 0.1f && CharacterController.isGrounded;

        if (CharacterController.isGrounded)
        {
            _ySpeed = _groundedGravity; 
            
            if (PlayerInputManager.Instance.JumpAction.action.WasPressedThisFrame())
                _ySpeed = _jumpForce;
        }
        else 
            _ySpeed += Physics.gravity.y * Time.deltaTime; 

        _moveDirection.y = _ySpeed;
        CharacterController.Move(_moveDirection * Time.deltaTime); 
    }
}
}