using Unity.Entities;
using Unity.NetCode;
using UnityEngine.Scripting;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Custom Netcode for Entities bootstrap. Subclassing <see cref="ClientServerBootstrap"/> gives an
    /// explicit hook to customize world creation, tick rate, and connection.
    /// <para>
    /// M4 (LAN co-op): auto-connect is DISABLED (<see cref="ClientServerBootstrap.AutoConnectPort"/> = 0).
    /// Listening/connecting is driven explicitly via the <see cref="ConnectionConfig"/> singleton and the
    /// per-world ConnectionControlSystems — from the UITK frontend menu (<c>MainMenuController</c> → <c>WorldLauncher</c>, Host / Join + IP) in player builds,
    /// or from the editor-only <c>EditorAutoHostSystem</c>, which auto-hosts on loopback and connects the
    /// in-proc client plus any Multiplayer-PlayMode-Tools thin clients. Direct IP/LAN only for now; Unity
    /// Relay is deferred to a later pass.
    /// </para>
    /// </summary>
    [Preserve]
    public class GameBootstrap : ClientServerBootstrap
    {
        public override bool Initialize(string defaultWorldName)
        {
            // No auto-connect: the menu (or, in the editor, the auto-host system) owns listen/connect.
            AutoConnectPort = 0;

#if UNITY_EDITOR
            // Editor: keep today's instant-into-game + MPPM loop by DEFAULT. Only the MAIN editor
            // (ClientAndServer) with the "Boot Into Menu (Editor)" toggle ON takes the frontend path, so MPPM
            // virtual players (Client) never boot to the menu. Open MainMenu.unity + Play to test the menu.
            bool bootMenu = UnityEditor.EditorPrefs.GetBool("ProjectM.BootIntoMenu", false)
                            && RequestedPlayType == PlayType.ClientAndServer;
            if (!bootMenu)
            {
                CreateDefaultClientServerWorlds();
                return true;
            }
            return false; // Frontend: Entities makes a single default "menu" world; MainMenuController drives sessions.
#else
            // Player build: a dedicated/headless server auto-hosts; everyone else boots the front-end menu.
            if (RequestedPlayType == PlayType.Server)
            {
                var server = CreateServerWorld("ServerWorld");
                World.DefaultGameObjectInjectionWorld = server;
                var em = server.EntityManager;
                var e = em.CreateEntity();
                em.AddComponentData(e, new ConnectionConfig { Mode = ConnectionMode.Host, Address = "0.0.0.0", Port = 7979, Requested = true });
                return true;
            }
            return false; // Frontend menu (MainMenu.unity is build index 0).
#endif
        }
    }
}