using System.Threading.Tasks;
using Godot;

public partial class NetworkManager : Node
{
	[Export] public RPCNode RPCNode { get; private set; }

	public static NetworkManager Singleton { get; private set; }

	public int LocalNetId { get; private set; } = -1;

	public override void _Ready()
	{
		Singleton = this;

		if (Global.IsGameHost)
		{
			CreateServer();
		}
		else
		{
			CreateClient();
		}

		GetTree().GetMultiplayer().PeerConnected += OnPlayerConnected;
		GetTree().GetMultiplayer().PeerDisconnected += OnPlayerDisconnected;
		GetTree().GetMultiplayer().ServerDisconnected += OnServerClosed;
	}

	public override void _ExitTree()
	{
		GetTree().GetMultiplayer().MultiplayerPeer.Close();
		GetTree().GetMultiplayer().MultiplayerPeer = null;
	}

	public void CreateServer()
	{
		ENetMultiplayerPeer peer = new();
		peer.CreateServer(2142, 128);

		GetTree().GetMultiplayer().MultiplayerPeer = peer;

		LocalNetId = GetTree().GetMultiplayer().GetUniqueId();

		_ = SpawnNetPlayer(LocalNetId);
	}

	public void CreateClient()
	{
		ENetMultiplayerPeer peer = new();
		peer.CreateClient("127.0.0.1", 2142);

		GetTree().GetMultiplayer().MultiplayerPeer = peer;

		LocalNetId = GetTree().GetMultiplayer().GetUniqueId();

		_ = SpawnNetPlayer(LocalNetId);
	}

	public void OnServerClosed()
	{
		GetTree().ChangeSceneToFile("res://scenes/main_menu.tscn");
	}

	public void OnPlayerConnected(long id)
	{
		if (Global.IsGameHost)
		{
			GameManager.Singleton.SendUniverseToClient(id);
		}

		_ = SpawnNetPlayer(id);
	}

	public void OnPlayerDisconnected(long id)
	{
		Player player = GetNode<Player>($"/root/Game/Space/Player-{id}");
		GameManager.Singleton.DespawnPlayer(player);
	}

	private async Task SpawnNetPlayer(long id)
	{
		while (GameManager.Loading)
		{
			await Task.Delay(10);
		}

		bool isMainPlayer = LocalNetId == id;

		Character character = new(GameManager.GameUniverse.Sectors[5, 5, 5], new(0, 0, 0));
		Player player = GameManager.Singleton.SpawnPlayer(character, isMainPlayer);
		player.Name = $"Player-{id}";

		player.SetMultiplayerAuthority((int)id);

		if (isMainPlayer && !Global.IsGameHost)
		{
			GameManager.Singleton.RpcId(1, nameof(GameManager.Singleton.RpcSendNearbySectors), character.CurrentSector.Coordinates, id);
		}
	}
}