using System;
using System.Threading.Tasks;
using UnityEngine;

namespace AlterchaseSDK
{
    public class ModIOIntegrationStub : MonoBehaviour
    {
        private static ModIOIntegrationStub instance;
        private bool isInitialized = false;
        private bool isAuthenticated = false;

        public static ModIOIntegrationStub Instance
        {
            get
            {
                if (instance == null)
                {
                    GameObject go = new GameObject("ModIOIntegration (Stub)");
                    instance = go.AddComponent<ModIOIntegrationStub>();
                    DontDestroyOnLoad(go);
                }
                return instance;
            }
        }

        public bool IsInitialized => isInitialized;
        public bool IsAuthenticated => isAuthenticated;

        public event Action OnInitialized;
        public event Action OnAuthenticationSuccess;
        public event Action<string> OnAuthenticationFailed;

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

        private void Start()
        {
            InitializeModIO();
        }

        public void InitializeModIO()
        {
            Debug.LogWarning("Using ModIOIntegrationStub - mod.io SDK not installed.");
            Debug.LogWarning("To enable mod.io integration:");
            Debug.LogWarning("1. Install mod.io Unity Plugin from Asset Store or GitHub");
            Debug.LogWarning("2. Add 'MODIO_INSTALLED' to Project Settings > Player > Scripting Define Symbols");
            Debug.LogWarning("3. Use ModIOIntegration instead of ModIOIntegrationStub");
            
            isInitialized = true;
            OnInitialized?.Invoke();
        }

        public async Task<bool> AuthenticateWithEmail(string email)
        {
            Debug.LogWarning($"Stub: Would authenticate with email: {email}");
            await Task.Delay(100);
            isAuthenticated = true;
            OnAuthenticationSuccess?.Invoke();
            return true;
        }

        public async Task<bool> SubmitSecurityCode(string code)
        {
            Debug.LogWarning($"Stub: Would submit security code: {code}");
            await Task.Delay(100);
            isAuthenticated = true;
            OnAuthenticationSuccess?.Invoke();
            return true;
        }

        public async Task<ModIOModProfile[]> BrowseMods()
        {
            Debug.LogWarning("Stub: Would browse mods from mod.io");
            await Task.Delay(100);
            return Array.Empty<ModIOModProfile>();
        }

        public async Task<bool> SubscribeToMod(long modId)
        {
            Debug.LogWarning($"Stub: Would subscribe to mod ID: {modId}");
            await Task.Delay(100);
            return true;
        }

        public async Task<bool> UnsubscribeFromMod(long modId)
        {
            Debug.LogWarning($"Stub: Would unsubscribe from mod ID: {modId}");
            await Task.Delay(100);
            return true;
        }

        public async Task<bool> UploadModPackage(ModPackage package, string modDirectory)
        {
            Debug.LogWarning($"Stub: Would upload mod package '{package.PackageName}' from {modDirectory}");
            await Task.Delay(100);
            return true;
        }

        public ModIOModProfile[] GetSubscribedMods()
        {
            Debug.LogWarning("Stub: Would return subscribed mods");
            return Array.Empty<ModIOModProfile>();
        }

        public async Task<Texture2D> DownloadModLogo(long modId)
        {
            Debug.LogWarning($"Stub: Would download logo for mod ID: {modId}");
            await Task.Delay(100);
            return null;
        }
    }

}
