using Unity.Collections;
using Unity.Netcode;
using UnityEngine;

public sealed class PlayerIdentity : NetworkBehaviour, IPlayerSystem
{
    private readonly NetworkVariable<FixedString64Bytes> displayName = new(
        new FixedString64Bytes("Worker"),
        NetworkVariableReadPermission.Everyone,
        NetworkVariableWritePermission.Owner);

    private TextMesh nameLabel;
    private bool isInitialized;

    public string DisplayName => displayName.Value.ToString();

    public void Initialize(PlayerFacade facade)
    {
        isInitialized = true;
    }

    public override void OnNetworkSpawn()
    {
        displayName.OnValueChanged += HandleNameChanged;
        CreateNameLabel();
        HandleNameChanged(default, displayName.Value);

        if (IsOwner)
        {
            string localName = NetworkSessionController.Instance != null
                ? NetworkSessionController.Instance.LocalPlayerName
                : "Worker";
            displayName.Value = new FixedString64Bytes(localName);
        }
    }

    public override void OnNetworkDespawn()
    {
        displayName.OnValueChanged -= HandleNameChanged;
    }

    private void LateUpdate()
    {
        if (!isInitialized || nameLabel == null || Camera.main == null)
            return;

        Vector3 cameraPosition = Camera.main.transform.position;
        nameLabel.transform.rotation = Quaternion.LookRotation(nameLabel.transform.position - cameraPosition);
    }

    private void CreateNameLabel()
    {
        if (nameLabel != null)
            return;

        var labelObject = new GameObject("PlayerNameLabel");
        labelObject.transform.SetParent(transform, false);
        labelObject.transform.localPosition = new Vector3(0f, 2.25f, 0f);
        labelObject.transform.localScale = Vector3.one * 0.12f;

        nameLabel = labelObject.AddComponent<TextMesh>();
        nameLabel.anchor = TextAnchor.MiddleCenter;
        nameLabel.alignment = TextAlignment.Center;
        nameLabel.fontSize = 48;
        nameLabel.characterSize = 0.1f;
        nameLabel.color = Color.white;
    }

    private void HandleNameChanged(FixedString64Bytes previousValue, FixedString64Bytes newValue)
    {
        if (nameLabel != null)
            nameLabel.text = newValue.ToString();
    }
}