using Unity.Netcode;
using UnityEngine;
using UnityEngine.InputSystem;

/// <summary>
/// Server-authoritative prototype movement.
/// The owner reads input, the server applies it, and NetworkTransform replicates the result.
/// </summary>
[RequireComponent(typeof(NetworkObject))]
public sealed class FriendslopPlayerMotor : NetworkBehaviour
{
    [SerializeField, Min(0.1f)] private float moveSpeed = 4.5f;

    private void Update()
    {
        if (!IsOwner || !IsSpawned || Keyboard.current == null)
        {
            return;
        }

        Vector2 input = ReadMoveInput();
        if (IsServer)
        {
            MoveOnServer(input);
        }
        else
        {
            MoveServerRpc(input);
        }
    }

    [ServerRpc]
    private void MoveServerRpc(Vector2 input)
    {
        MoveOnServer(input);
    }

    private void MoveOnServer(Vector2 input)
    {
        if (input.sqrMagnitude > 1f)
        {
            input.Normalize();
        }

        Vector3 direction = new Vector3(input.x, 0f, input.y);
        transform.position += direction * (moveSpeed * Time.deltaTime);

        if (direction.sqrMagnitude > 0.001f)
        {
            transform.forward = Vector3.Slerp(transform.forward, direction, 14f * Time.deltaTime);
        }
    }

    private static Vector2 ReadMoveInput()
    {
        Keyboard keyboard = Keyboard.current;
        float horizontal = (keyboard.dKey.isPressed || keyboard.rightArrowKey.isPressed ? 1f : 0f)
            - (keyboard.aKey.isPressed || keyboard.leftArrowKey.isPressed ? 1f : 0f);
        float vertical = (keyboard.wKey.isPressed || keyboard.upArrowKey.isPressed ? 1f : 0f)
            - (keyboard.sKey.isPressed || keyboard.downArrowKey.isPressed ? 1f : 0f);

        return new Vector2(horizontal, vertical);
    }
}