using Unity.Netcode;
using UnityEngine;

/// <summary>
/// Щит: удержание F — поднят (нет стрельбы, иммунитет к пулям, замедление).
/// Состояние синхронизируется через NetworkVariable (видно на клонах и у других игроков).
/// </summary>
public class PlayerShield : NetworkBehaviour
{
    [SerializeField] private GameObject shieldVisual;
    [SerializeField] private float shieldMoveSpeedMultiplier = 0.45f;

    public NetworkVariable<bool> isActive = new NetworkVariable<bool>(false);

    private PlayerHealth playerHealth;
    private bool inputEnabled;

    public bool IsShieldUp => isActive.Value;
    public float MoveSpeedMultiplier => isActive.Value ? shieldMoveSpeedMultiplier : 1f;

    public override void OnNetworkSpawn()
    {
        isActive.OnValueChanged += OnShieldChanged;
        UpdateVisual(isActive.Value);
    }

    public override void OnNetworkDespawn()
    {
        isActive.OnValueChanged -= OnShieldChanged;
    }

    /// <summary> Владелец игрока — читает F и шлёт на сервер. </summary>
    public void InitInput()
    {
        inputEnabled = true;
        playerHealth = GetComponent<PlayerHealth>();
    }

    private void Update()
    {
        if (!inputEnabled || !IsOwner) return;
        if (playerHealth != null && playerHealth.isDead.Value) return;

        bool _wantShield = Input.GetKey(KeyCode.F);
        if (_wantShield == isActive.Value) return;

        SetShieldServerRpc(_wantShield);
    }

    /// <summary> Сервер: для клонов при воспроизведении записи. </summary>
    public void SetShieldState(bool _active)
    {
        if (!IsServer) return;
        isActive.Value = _active;
    }

    [ServerRpc]
    private void SetShieldServerRpc(bool _active)
    {
        if (playerHealth == null) playerHealth = GetComponent<PlayerHealth>();
        if (playerHealth != null && playerHealth.isDead.Value) return;

        isActive.Value = _active;
    }

    private void OnShieldChanged(bool _previous, bool _current) => UpdateVisual(_current);

    private void UpdateVisual(bool _active)
    {
        if (shieldVisual != null)
            shieldVisual.SetActive(_active);
    }
}