using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerControllerV2 : MonoBehaviour
{
    private CharacterController m_CharacterController;
    private Camera m_Camera;
    private bool m_IsGrounded = false;
    public float m_LookSensitivity = 25f;
    public float m_PlayerSpeed = 10f;
    private Vector2 m_MoveInput = Vector2.zero;
    private Vector2 m_LookInput = Vector2.zero;
    private Vector3 m_Velocity = Vector3.zero;
    public float m_MaxSpeed = 5f;

    void Awake()
    {
        m_CharacterController = GetComponent<CharacterController>();
        m_Camera = GetComponentInChildren<Camera>();
        Cursor.lockState = CursorLockMode.Locked;
    }

    void FixedUpdate()
    {
        m_IsGrounded = false;
        RaycastHit hit; // TODO: Use to see if on train later and ground angle if that's relevant
        if (Physics.Raycast(transform.position, Vector3.down, out hit, 1.1f))
        {
            m_IsGrounded = true;
        }

        Look();
        Move();
    }

    private void Look()
    {
        m_CharacterController.transform.Rotate(Vector3.up * m_LookInput.x * m_LookSensitivity * Time.deltaTime);

        float pitchRotation = m_Camera.transform.eulerAngles.x;
        if (pitchRotation > 270) pitchRotation -= 360;
        pitchRotation -= m_LookInput.y * m_LookSensitivity * Time.deltaTime;
        //pitchRotation = Mathf.Clamp(pitchRotation, -90f, 90f);

        m_Camera.transform.localRotation = Quaternion.Euler(pitchRotation, 0f, 0f);
    }
    private void Move()
    {
        Vector3 direction = transform.right * m_MoveInput.x +
            transform.forward * m_MoveInput.y;

        m_Velocity += -transform.up * 9.81f * Time.deltaTime; // Gravity

        // Reset negative velocity when landed
        if (m_IsGrounded && m_Velocity.y < 0)
        {
            m_Velocity.y = -1 * Time.deltaTime;
        }

        // Apply input to velocity only when on the ground
        if (m_IsGrounded)
        {
            m_Velocity += direction * m_PlayerSpeed * Time.deltaTime;
        }

        // Apply friction when on the ground and not moving
        if (m_IsGrounded && m_MoveInput.magnitude < .1f /*dead zone*/)
        {
            m_Velocity.x /= 1.1f;
            m_Velocity.z /= 1.1f;
        }

        m_CharacterController.Move(m_Velocity * Time.deltaTime);
    }

    void OnJump()
    {
        if (m_IsGrounded)
        {
            m_Velocity.y = 10;
            m_IsGrounded = false;
        }
    }

    void OnMove(InputValue value)
    {
        m_MoveInput = value.Get<Vector2>();   
    }

    void OnLook(InputValue value)
    {
        m_LookInput = value.Get<Vector2>();   
    }
}