using Steamworks;
using UnityEngine;

namespace MegaKoop.Game.Networking
{
    /// <summary>
    /// Handles SteamAPI initialization and callback pumping. Place once in the initial scene.
    /// </summary>
    [DefaultExecutionOrder(-1000)]
    public class SteamBootstrap : MonoBehaviour
    {
        private static bool isInitialized;
        private static SteamBootstrap instance;

        public static bool IsInitialized => isInitialized;

        private void Awake()
        {
            if (instance != null)
            {
                Destroy(gameObject);
                return;
            }

            instance = this;
            DontDestroyOnLoad(gameObject);

            TryInitializeSteam();
        }

        private void TryInitializeSteam()
        {
            if (isInitialized)
            {
                return;
            }

            if (!Packsize.Test())
            {
                Debug.LogError("[SteamBootstrap] Packsize Test returned false. Wrong Steamworks binaries for this platform?");
                return;
            }

            if (!DllCheck.Test())
            {
                Debug.LogError("[SteamBootstrap] DllCheck Test returned false. Missing Steamworks dependencies.");
                return;
            }

            try
            {
                isInitialized = SteamAPI.Init();
            }
            catch (System.DllNotFoundException e)
            {
                Debug.LogError("[SteamBootstrap] Steamworks native binaries not found: " + e.Message);
                isInitialized = false;
            }

            if (!isInitialized)
            {
                Debug.LogError("[SteamBootstrap] Failed to initialize Steam API.");
            }
            else
            {
                Debug.Log("[SteamBootstrap] Steam API initialized for user " + SteamFriends.GetPersonaName());
            }
        }

        private void Update()
        {
            if (!isInitialized)
            {
                return;
            }

            SteamAPI.RunCallbacks();
        }

        private void OnDestroy()
        {
            if (instance == this)
            {
                ShutdownSteam();
                instance = null;
            }
        }

        private void ShutdownSteam()
        {
            if (!isInitialized)
            {
                return;
            }

            SteamAPI.Shutdown();
            isInitialized = false;
            Debug.Log("[SteamBootstrap] Steam API shutdown.");
        }
    }
}