using UnityEngine;
using UnityEngine.InputSystem;

namespace IllOmen
{
    /// <summary>Free walking for inspecting test scenes: WASD to move, Shift to hurry, mouse to look.</summary>
    public class WalkAround : MonoBehaviour
    {
        [SerializeField] private float walkSpeed = 1.5f;
        [SerializeField] private float runSpeed = 3.5f;
        [SerializeField] private float sensitivity = 0.08f;
        [SerializeField] private float maxPitch = 80f;

        private float yaw;
        private float pitch;

        private void Start()
        {
            yaw = transform.eulerAngles.y;
            Cursor.lockState = CursorLockMode.Locked;
            Cursor.visible = false;
        }

        private void Update()
        {
            Mouse mouse = Mouse.current;
            if (mouse != null)
            {
                Vector2 delta = mouse.delta.ReadValue() * sensitivity;
                yaw += delta.x;
                pitch = Mathf.Clamp(pitch - delta.y, -maxPitch, maxPitch);
                transform.rotation = Quaternion.Euler(pitch, yaw, 0f);
            }

            Keyboard keyboard = Keyboard.current;
            if (keyboard == null) return;

            Vector3 input = Vector3.zero;
            if (keyboard.wKey.isPressed) input.z += 1f;
            if (keyboard.sKey.isPressed) input.z -= 1f;
            if (keyboard.dKey.isPressed) input.x += 1f;
            if (keyboard.aKey.isPressed) input.x -= 1f;

            float speed = keyboard.leftShiftKey.isPressed ? runSpeed : walkSpeed;
            transform.position += Quaternion.Euler(0f, yaw, 0f) * input.normalized * speed * Time.deltaTime;
        }
    }
}