using UnityEngine;
using UnityEngine.InputSystem;

namespace Agame
{
    public class MouseLook : MonoBehaviour
    {
        [Header("Sensitivity")]
        [Tooltip("Degrees of rotation per pixel of mouse movement.")]
        public float mouseSensitivity = 0.12f;

        [Header("Vertical Clamp")]
        public float minLookAngle = -80f;
        public float maxLookAngle = 80f;

        [Header("References")]
        public Transform characterBody;

        private float xRotation = 0f;

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

        private void Update()
        {
            var kb = Keyboard.current;
            var mouse = Mouse.current;
            if (mouse == null)
            {
                return;
            }

            // Esc releases the cursor, left click grabs it again (editor-friendly)
            if (kb != null && kb.escapeKey.wasPressedThisFrame)
            {
                LockCursor(false);
            }
            if (mouse.leftButton.wasPressedThisFrame && Cursor.lockState != CursorLockMode.Locked)
            {
                LockCursor(true);
            }

            if (Cursor.lockState != CursorLockMode.Locked)
            {
                return;
            }

            // Mouse delta is in pixels for the new Input System
            Vector2 delta = mouse.delta.ReadValue();
            float mouseX = delta.x * mouseSensitivity;
            float mouseY = delta.y * mouseSensitivity;

            // Yaw the body left/right
            if (characterBody != null)
            {
                characterBody.Rotate(Vector3.up * mouseX);
            }

            // Pitch the camera up/down
            xRotation -= mouseY;
            xRotation = Mathf.Clamp(xRotation, minLookAngle, maxLookAngle);
            transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
        }

        private void LockCursor(bool locked)
        {
            Cursor.lockState = locked ? CursorLockMode.Locked : CursorLockMode.None;
            Cursor.visible = !locked;
        }
    }
}