using UnityEngine;
using Unity.Netcode;

public class TunnelNode : NetworkBehaviour, IInteractable
{
    public TunnelNode aboveNode;
    public TunnelNode belowNode;

    public override void OnNetworkSpawn()
    {
        // 모든 클라이언트에서 각자 장부에 등록
        Vector3Int myPos = BuildManager.Instance.WorldToGrid3D(transform.position);
        BuildManager.Instance.RegisterTunnel(myPos, this);

        // 모든 노드가 등록될 시간을 벌기 위해 서버에서 약간 지연 후 연결 명령
        if (IsServer) Invoke(nameof(SyncLinks), 0.2f);
    }

    private void SyncLinks() => LinkVerticalRpc();

    [Rpc(SendTo.Everyone)]
    private void LinkVerticalRpc() => LinkVertical();

    public void LinkVertical()
    {
        Vector3Int myPos = BuildManager.Instance.WorldToGrid3D(transform.position);
        aboveNode = BuildManager.Instance.GetTunnelAt(myPos + Vector3Int.up);
        belowNode = BuildManager.Instance.GetTunnelAt(myPos + Vector3Int.down);

        if (aboveNode != null) aboveNode.belowNode = this;
        if (belowNode != null) belowNode.aboveNode = this;
    }

    public void Interact(GameObject user)
    {
        var traveler = user.GetComponent<TunnelTraveler>();
        if (traveler && !traveler.IsTraveling) traveler.StartTravel(this);
    }

    public string GetInteractionText() => "터널 이용 [E]";
}