From 772c272fb4f7ca597bb36a39927e524946e641fe Mon Sep 17 00:00:00 2001
From: Kei-Luna <touhousetsuna@gmail.com>
Date: Sun, 24 May 2026 07:11:29 +0900
Subject: [PATCH] ClimbTowerLogic_SetLevelDiff

---
 Common/Data/Excel/ClimbTowerDiffExcel.cs      | 18 +++++
 Common/Data/GameData.cs                       |  1 +
 .../Tower/ClimbTowerLogic_SetLevelDiff.cs     | 76 +++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 Common/Data/Excel/ClimbTowerDiffExcel.cs
 create mode 100644 GameServer/Server/CallGS/Handlers/Tower/ClimbTowerLogic_SetLevelDiff.cs

diff --git a/Common/Data/Excel/ClimbTowerDiffExcel.cs b/Common/Data/Excel/ClimbTowerDiffExcel.cs
new file mode 100644
index 0000000..6f89b4d
--- /dev/null
+++ b/Common/Data/Excel/ClimbTowerDiffExcel.cs
@@ -0,0 +1,18 @@
+using Newtonsoft.Json;
+
+namespace MikuSB.Data.Excel;
+
+[ResourceEntity("challenge/climbtower/climb_tower_diff.json")]
+public class ClimbTowerDiffExcel : ExcelResource
+{
+    [JsonProperty("ID")] public uint ID { get; set; }
+    [JsonProperty("Level1")] public int Level1 { get; set; }
+    [JsonProperty("Level2")] public int Level2 { get; set; }
+
+    public override uint GetId() => ID;
+
+    public override void Loaded()
+    {
+        GameData.ClimbTowerDiffData[ID] = this;
+    }
+}
diff --git a/Common/Data/GameData.cs b/Common/Data/GameData.cs
index 96c5bdb..a1f04af 100644
--- a/Common/Data/GameData.cs
+++ b/Common/Data/GameData.cs
@@ -34,6 +34,7 @@ public static class GameData
     public static Dictionary<uint, BossPvpBossExcel> BossPvpBossData { get; private set; } = [];
     public static Dictionary<uint, BossPvpNumExcel> BossPvpNumData { get; private set; } = [];
     public static Dictionary<uint, ClimbTowerTimeExcel> ClimbTowerTimeData { get; private set; } = [];
+    public static Dictionary<uint, ClimbTowerDiffExcel> ClimbTowerDiffData { get; private set; } = [];
     public static Dictionary<uint, Dictionary<int, ClimbTowerAwardExcel>> ClimbTowerAwardData { get; private set; } = [];
     public static Dictionary<uint, ClimbTowerLevelOrderExcel> ClimbTowerLevelOrderData { get; private set; } = [];
     public static Dictionary<uint, TowerLevelExcel> TowerLevelData { get; private set; } = [];
diff --git a/GameServer/Server/CallGS/Handlers/Tower/ClimbTowerLogic_SetLevelDiff.cs b/GameServer/Server/CallGS/Handlers/Tower/ClimbTowerLogic_SetLevelDiff.cs
new file mode 100644
index 0000000..ec96141
--- /dev/null
+++ b/GameServer/Server/CallGS/Handlers/Tower/ClimbTowerLogic_SetLevelDiff.cs
@@ -0,0 +1,76 @@
+using MikuSB.Data;
+using MikuSB.Database;
+using MikuSB.Database.Player;
+using MikuSB.Proto;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MikuSB.GameServer.Server.CallGS.Handlers.Tower;
+
+[CallGSApi("ClimbTowerLogic_SetLevelDiff")]
+public class ClimbTowerLogic_SetLevelDiff : ICallGSHandler
+{
+    private const uint TowerGroupId = 3;
+    private const uint DiffSid = 4;
+    private const uint HisDiffSid = 5;
+
+    public async Task Handle(Connection connection, string param, ushort seqNo)
+    {
+        var player = connection.Player!;
+        var req = JsonSerializer.Deserialize<ClimbTowerSetLevelDiffParam>(param);
+        if (req == null || req.Diff <= 0)
+        {
+            await CallGSRouter.SendScript(connection, "ClimbTowerLogic_SetLevelDiff", "{\"sErr\":\"error.BadParam\"}");
+            return;
+        }
+
+        if (!GameData.ClimbTowerDiffData.ContainsKey((uint)req.Diff))
+        {
+            await CallGSRouter.SendScript(connection, "ClimbTowerLogic_SetLevelDiff", "{\"sErr\":\"error.BadParam\"}");
+            return;
+        }
+
+        var hisDiff = GetAttrValue(player.Data, TowerGroupId, HisDiffSid);
+        if (req.Diff > hisDiff + 1)
+        {
+            await CallGSRouter.SendScript(connection, "ClimbTowerLogic_SetLevelDiff", "{\"sErr\":\"error.BadParam\"}");
+            return;
+        }
+
+        var diffAttr = GetOrCreateAttr(player.Data, TowerGroupId, DiffSid);
+        diffAttr.Val = (uint)req.Diff;
+
+        var sync = new NtfSyncPlayer();
+        sync.Custom[player.ToPackedAttrKey(diffAttr.Gid, diffAttr.Sid)] = diffAttr.Val;
+        sync.Custom[player.ToShiftedAttrKey(diffAttr.Gid, diffAttr.Sid)] = diffAttr.Val;
+
+        DatabaseHelper.SaveDatabaseType(player.Data);
+        await CallGSRouter.SendScript(connection, "ClimbTowerLogic_SetLevelDiff", "{}", sync);
+    }
+
+    private static uint GetAttrValue(PlayerGameData data, uint gid, uint sid)
+    {
+        return data.Attrs.FirstOrDefault(x => x.Gid == gid && x.Sid == sid)?.Val ?? 0;
+    }
+
+    private static PlayerAttr GetOrCreateAttr(PlayerGameData data, uint gid, uint sid)
+    {
+        var attr = data.Attrs.FirstOrDefault(x => x.Gid == gid && x.Sid == sid);
+        if (attr != null)
+            return attr;
+
+        attr = new PlayerAttr
+        {
+            Gid = gid,
+            Sid = sid
+        };
+        data.Attrs.Add(attr);
+        return attr;
+    }
+}
+
+internal sealed class ClimbTowerSetLevelDiffParam
+{
+    [JsonPropertyName("nDiff")]
+    public int Diff { get; set; }
+}