using UnityEngine;
using UnityEngine.InputSystem;

namespace Agame
{
    [RequireComponent(typeof(CharacterController))]
    public class PlayerController : MonoBehaviour
    {
        [Header("Movement")]
        public float moveSpeed = 5f;
        public float sprintSpeed = 8f;
        public float gravity = -20f;
        public float jumpHeight = 1.5f;

        private CharacterController controller;
        private Vector3 velocity;
        private bool isGrounded;

        private void Awake()
        {
            controller = GetComponent<CharacterController>();
        }

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

            isGrounded = controller.isGrounded;
            if (isGrounded && velocity.y < 0f)
            {
                velocity.y = -2f;
            }

            // WASD input
            float moveX = 0f;
            float moveZ = 0f;
            if (kb.aKey.isPressed) moveX -= 1f;
            if (kb.dKey.isPressed) moveX += 1f;
            if (kb.sKey.isPressed) moveZ -= 1f;
            if (kb.wKey.isPressed) moveZ += 1f;

            // Move relative to the capsule's own facing (which MouseLook rotates)
            Vector3 move = transform.right * moveX + transform.forward * moveZ;
            move = Vector3.ClampMagnitude(move, 1f);

            float speed = kb.leftShiftKey.isPressed ? sprintSpeed : moveSpeed;
            controller.Move(move * speed * Time.deltaTime);

            // Jump
            if (kb.spaceKey.wasPressedThisFrame && isGrounded)
            {
                velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
            }

            // Gravity
            velocity.y += gravity * Time.deltaTime;
            controller.Move(velocity * Time.deltaTime);
        }
    }
}