using System.Reflection;
using System.Text.Json;
using System.Text.Json.Nodes;
using HarmonyLib;
using SPTarkov.Reflection.Patching;
using SPTarkov.Server.Core.Routers;
using SPTarkov.Server.Core.Models.Common;
using SPTarkov.Server.Core.Models.Eft.Launcher;
using SPTarkov.Server.Core.Callbacks;
using SPTarkov.Server.Core.Controllers;
using System.Threading;

namespace PersonalAuthMod;

/// <summary>
///     AsyncLocal to pass the password from the patch to the router
/// </summary>
public static class AuthContext
{
    private static readonly AsyncLocal<string?> _currentPassword = new();
    private static readonly AsyncLocal<string?> _currentSessionID = new();

    public static string? CurrentPassword
    {
        get => _currentPassword.Value;
        set => _currentPassword.Value = value;
    }

    public static string? CurrentSessionID
    {
        get => _currentSessionID.Value;
        set => _currentSessionID.Value = value;
    }
}

/// <summary>
///     Patch HttpRouter.HandleRoute to capture session ID globally before deserialization happens.
/// </summary>
public class HttpRouterHandleRoutePatch : AbstractPatch
{
    protected override MethodBase GetTargetMethod()
    {
        return typeof(HttpRouter).GetMethod("HandleRoute", BindingFlags.NonPublic | BindingFlags.Instance)!;
    }

    [PatchPrefix]
    public static void Prefix(MongoId sessionID)
    {
        // Capture the session ID for other patches (like profile filtering)
        AuthContext.CurrentSessionID = sessionID.ToString();
    }
}
/// <summary>
///     Patch LauncherCallbacks.Login to enforce database authentication.
///     Returns true to let the original method execute and fetch the MongoId from memory.
///     Returns false if DB verification fails, aborting the original method.
/// </summary>
public class LauncherCallbacksLoginPatch : AbstractPatch
{
    protected override MethodBase GetTargetMethod()
    {
        return typeof(LauncherCallbacks).GetMethod(nameof(LauncherCallbacks.Login))!;
    }

    [PatchPrefix]
    public static bool Prefix(string url, LoginRequestData info, MongoId sessionID, ref ValueTask<string> __result)
    {
        if (string.IsNullOrWhiteSpace(info.Username) || string.IsNullOrWhiteSpace(info.Password))
        {
            __result = new ValueTask<string>("FAILED");
            return false;
        }

        if (!PersonalAuthMod.Instance!.DbManager.ValidateCredentials(info.Username, info.Password))
        {
            Console.WriteLine($"[PersonalAuthMod] Login FAILED for user: {info.Username} (Invalid credentials via DB)");
            __result = new ValueTask<string>("FAILED");
            return false;
        }

        Console.WriteLine($"[PersonalAuthMod] Login SUCCESS for user: {info.Username}, Validated by DB.");
        return true; 
    }
}

/// <summary>
///     Patch LauncherCallbacks.Register to enforce database registration.
///     Returns true to let the original method execute and create the account in SaveServer.
///     Returns false if DB registration fails (e.g. user exists).
/// </summary>
public class LauncherCallbacksRegisterPatch : AbstractPatch
{
    protected override MethodBase GetTargetMethod()
    {
        return typeof(LauncherCallbacks).GetMethod(nameof(LauncherCallbacks.Register))!;
    }

    [PatchPrefix]
    public static bool Prefix(string url, RegisterData info, MongoId sessionID, ref ValueTask<string> __result)
    {
        if (string.IsNullOrWhiteSpace(info.Username) || string.IsNullOrWhiteSpace(info.Password))
        {
            __result = new ValueTask<string>("FAILED");
            return false;
        }

        if (!PersonalAuthMod.Instance!.DbManager.RegisterUser(info.Username, info.Password))
        {
            Console.WriteLine($"[PersonalAuthMod] Register FAILED for user: {info.Username} (Already exists or DB error)");
            __result = new ValueTask<string>("FAILED");
            return false;
        }

        Console.WriteLine($"[PersonalAuthMod] Register SUCCESS for user: {info.Username}");
        return true; 
    }
}