Rename the log file

Common/Internationalization/Message/LanguageCHS.cs

@@ -222,9 +222,16 @@ public class HelpTextCHS
 public class AccountTextCHS
 {
     public string Desc => "管理 SDK 登录使用的账号映射";
-    public string Usage => "用法: /account create <邮箱> <UID>";
+    public string Usage =>
+        "用法: /account create <邮箱> <UID>\n" +
+        "用法: /account delete <邮箱|UID>\n" +
+        "用法: /account list";
     public string Created => "已创建账号映射: {0} -> UID {1}";
     public string CreateFailed => "创建账号映射失败: {0}";
+    public string Deleted => "已删除账号映射: {0} -> UID {1}";
+    public string DeleteFailed => "删除账号映射失败: {0}";
+    public string DeleteOnline => "账号在线时无法删除: {0} -> UID {1}";
+    public string NotFound => "未找到账号: {0}";
 }
 
 /// <summary>

Common/Internationalization/Message/LanguageCHT.cs

@@ -222,9 +222,16 @@ public class HelpTextCHT
 public class AccountTextCHT
 {
     public string Desc => "管理 SDK 登入使用的帳號映射";
-    public string Usage => "用法: /account create <郵箱> <UID>";
+    public string Usage =>
+        "用法: /account create <郵箱> <UID>\n" +
+        "用法: /account delete <郵箱|UID>\n" +
+        "用法: /account list";
     public string Created => "已建立帳號映射: {0} -> UID {1}";
     public string CreateFailed => "建立帳號映射失敗: {0}";
+    public string Deleted => "已刪除帳號映射: {0} -> UID {1}";
+    public string DeleteFailed => "刪除帳號映射失敗: {0}";
+    public string DeleteOnline => "帳號在線時無法刪除: {0} -> UID {1}";
+    public string NotFound => "未找到帳號: {0}";
 }
 
 /// <summary>

Common/Internationalization/Message/LanguageEN.cs

@@ -188,9 +188,16 @@ public class HelpTextEN
 public class AccountTextEN
 {
     public string Desc => "Manage account mappings for SDK logins";
-    public string Usage => "Usage: /account create <email> <uid>";
+    public string Usage =>
+        "Usage: /account create <email> <uid>\n" +
+        "Usage: /account delete <email|uid>\n" +
+        "Usage: /account list";
     public string Created => "Created account mapping: {0} -> UID {1}";
     public string CreateFailed => "Failed to create account mapping: {0}";
+    public string Deleted => "Deleted account mapping: {0} -> UID {1}";
+    public string DeleteFailed => "Failed to delete account mapping: {0}";
+    public string DeleteOnline => "Cannot delete account while online: {0} -> UID {1}";
+    public string NotFound => "Account not found: {0}";
 }
 
 /// <summary>

GameServer/Command/Commands/CommandAccount.cs

@@ -2,6 +2,7 @@ using MikuSB.Database;
 using MikuSB.Database.Account;
 using MikuSB.Enums.Player;
 using MikuSB.Internationalization;
+using MikuSB.GameServer.Server;
 using System.Text;
 
 namespace MikuSB.GameServer.Command.Commands;
@@ -37,6 +38,42 @@ public class CommandAccount : ICommands
         }
     }
 
+    [CommandMethod("delete")]
+    public async ValueTask Delete(CommandArg arg)
+    {
+        if (!await arg.CheckArgCnt(1))
+            return;
+
+        var identifier = arg.Args[0].Trim();
+        var account = int.TryParse(identifier, out var uid) && uid > 0
+            ? AccountData.GetAccountByUid(uid)
+            : AccountData.GetAccountByUserName(identifier);
+
+        if (account == null)
+        {
+            await arg.SendMsg(I18NManager.Translate("Game.Command.Account.NotFound", identifier));
+            return;
+        }
+
+        try
+        {
+            if (Listener.GetActiveConnection(account.Uid) != null)
+            {
+                await arg.SendMsg(I18NManager.Translate("Game.Command.Account.DeleteOnline", account.Username,
+                    account.Uid.ToString()));
+                return;
+            }
+
+            AccountData.DeleteAccount(account.Uid);
+            await arg.SendMsg(I18NManager.Translate("Game.Command.Account.Deleted", account.Username,
+                account.Uid.ToString()));
+        }
+        catch (Exception ex)
+        {
+            await arg.SendMsg(I18NManager.Translate("Game.Command.Account.DeleteFailed", ex.Message));
+        }
+    }
+
     [CommandMethod("list")]
     public async ValueTask List(CommandArg arg)
     {

MikuSB/Program/LoaderManager.cs

@@ -22,16 +22,35 @@ public class LoaderManager : MikuSB
     public static void InitConfig()
     {
         // Initialize log
-        var counter = 0;
-        FileInfo file;
-        while (true)
+        var logDir = ConfigManager.Config.Path.LogPath;
+        var logFile = new FileInfo(Path.Combine(logDir, "Server.log"));
+        logFile.Directory?.Create();
+
+        if (logFile.Exists)
         {
-            file = new FileInfo(ConfigManager.Config.Path.LogPath + $"/{DateTime.Now:yyyy-MM-dd}-{++counter}.log");
-            if (file is not { Exists: false, Directory: not null }) continue;
-            file.Directory.Create();
-            break;
+            // Read start time from first log line, fall back to file creation time
+            DateTime logStartTime;
+            try
+            {
+                var firstLine = File.ReadLines(logFile.FullName).FirstOrDefault() ?? "";
+                // Format: [HH:mm:ss] ...
+                var timeStr = firstLine.Length >= 10 ? firstLine[1..9] : "";
+                var dateStr = logFile.CreationTime.ToString("yyyy-MM-dd");
+                logStartTime = DateTime.TryParse($"{dateStr} {timeStr}", out var parsed)
+                    ? parsed
+                    : logFile.CreationTime;
+            }
+            catch
+            {
+                logStartTime = logFile.CreationTime;
+            }
+
+            var backupName = $"Server-backup-{logStartTime:yyyy.MM.dd-HH.mm.ss}.log";
+            var backupFile = new FileInfo(Path.Combine(logDir, backupName));
+            logFile.MoveTo(backupFile.FullName, overwrite: true);
         }
-        Logger.SetLogFile(file);
+
+        Logger.SetLogFile(new FileInfo(Path.Combine(logDir, "Server.log")));
 
         // Init all directories
         try

SdkServer/Handlers/RouteController.cs

@@ -270,13 +270,13 @@ public class RouteController : ControllerBase
         var finalEmail = email ?? form_email ?? await GetJsonBodyValue("email");
         if (!string.IsNullOrWhiteSpace(finalEmail))
         {
-            var username = finalEmail.Split('@')[0];
-            var accountData = AccountData.GetAccountByUserName(username);
+            var normalizedEmail = finalEmail.Trim();
+            var accountData = AccountData.GetAccountByEmail(normalizedEmail);
             if (accountData == null)
             {
                 if (!ConfigManager.Config.ServerOption.AutoCreateUser) return BuildLoginFailedResponse("Account not found.");
-                AccountData.CreateAccount(username, 0, "123456");
-                accountData = AccountData.GetAccountByUserName(username)!;
+                AccountData.CreateAccount(normalizedEmail, 0, "123456");
+                accountData = AccountData.GetAccountByEmail(normalizedEmail)!;
             }
 
             var finalUidValue = accountData.Uid.ToString();