Update Epitomized Path (#1254)

* Update Epitomized Path

* Update Epitomized Path

* Update Epitomized Path

* Refactor doRarePull

* Update Epitomized Path

Co-authored-by: AnimeGitUserB <AnimeGitUserB@bigblueball.in>

src/main/java/emu/grasscutter/game/gacha/GachaBanner.java

 package emu.grasscutter.game.gacha;
 
+import emu.grasscutter.database.DatabaseHelper;
+import emu.grasscutter.game.Account;
+import emu.grasscutter.game.player.Player;
 import emu.grasscutter.net.proto.GachaInfoOuterClass.GachaInfo;
 import emu.grasscutter.net.proto.GachaUpInfoOuterClass.GachaUpInfo;
 import emu.grasscutter.utils.Utils;
@@ -44,6 +47,7 @@ public class GachaBanner {
 	private int[] rateUpItems2 = {};
 	private int eventChance = -1;
 	private int costItem = 0;
+	private int wishMaxProgress = 2;
 	
 	public int getGachaType() {
 		return gachaType;
@@ -108,6 +112,11 @@ public class GachaBanner {
 	public boolean getRemoveC6FromPool() {return removeC6FromPool;}
 	public boolean getAutoStripRateUpFromFallback() {return autoStripRateUpFromFallback;}
 
+	public int getWishMaxProgress() {return wishMaxProgress;}
+
+	public boolean hasEpitomized() {
+		return bannerType.equals(BannerType.WEAPON);
+	}
 
 	public int getWeight(int rarity, int pity) {
 		return switch(rarity) {
@@ -166,6 +175,17 @@ public class GachaBanner {
 	            .setLeftGachaTimes(Integer.MAX_VALUE)
 	            .setGachaTimesLimit(Integer.MAX_VALUE)
 	            .setGachaSortId(this.getSortId());
+
+		if(hasEpitomized() && !sessionKey.isEmpty()) {
+			Account account = DatabaseHelper.getAccountBySessionKey(sessionKey);
+			Player player = Grasscutter.getGameServer().getPlayerByAccountId(account.getId());
+			PlayerGachaBannerInfo gachaInfo = player.getGachaInfo().getBannerInfo(this);
+
+			info.setWishItemId(gachaInfo.getWishItemId())
+				.setWishProgress(gachaInfo.getFailedChosenItemPulls())
+				.setWishMaxProgress(this.getWishMaxProgress());
+		}
+
 		if (this.getTitlePath() != null) {
 			info.setTitleTextmap(this.getTitlePath());
 		}

src/main/java/emu/grasscutter/game/gacha/GachaManager.java

@@ -35,6 +35,7 @@ import emu.grasscutter.net.proto.RetcodeOuterClass.Retcode;
 import emu.grasscutter.server.game.GameServer;
 import emu.grasscutter.server.game.GameServerTickEvent;
 import emu.grasscutter.server.packet.send.PacketDoGachaRsp;
+import emu.grasscutter.server.packet.send.PacketGachaWishRsp;
 import emu.grasscutter.utils.Utils;
 import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
 import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
@@ -182,38 +183,59 @@ public class GachaManager {
 		return 0;  // This should only be reachable if total==0
 	}
 
+	private synchronized int doFallbackRarePull(int[] fallback1, int[] fallback2, int rarity, GachaBanner banner, PlayerGachaBannerInfo gachaInfo) {
+		if (fallback1.length < 1) {
+			if (fallback2.length < 1) {
+				return getRandom((rarity==5)? fallbackItems5Pool2Default : fallbackItems4Pool2Default);
+			} else {
+				return getRandom(fallback2);
+			}
+		} else if (fallback2.length < 1) {
+			return getRandom(fallback1);
+		} else {  // Both pools are possible, use the pool balancer
+			int pityPool1 = banner.getPoolBalanceWeight(rarity, gachaInfo.getPityPool(rarity, 1));
+			int pityPool2 = banner.getPoolBalanceWeight(rarity, gachaInfo.getPityPool(rarity, 2));
+			int chosenPool = switch ((pityPool1 >= pityPool2)? 1 : 0) {  // Larger weight must come first for the hard cutoff to function correctly
+				case 1 -> 1 + drawRoulette(new int[] {pityPool1, pityPool2}, 10000);
+				default -> 2 - drawRoulette(new int[] {pityPool2, pityPool1}, 10000);
+			};
+			return switch (chosenPool) {
+				case 1:
+					gachaInfo.setPityPool(rarity, 1, 0);
+					yield getRandom(fallback1);
+				default:
+					gachaInfo.setPityPool(rarity, 2, 0);
+					yield getRandom(fallback2);
+			};
+		}
+	}
+
 	private synchronized int doRarePull(int[] featured, int[] fallback1, int[] fallback2, int rarity, GachaBanner banner, PlayerGachaBannerInfo gachaInfo) {
 		int itemId = 0;
-		boolean pullFeatured = (gachaInfo.getFailedFeaturedItemPulls(rarity) >= 1)  // Lost previous coinflip
-							|| (this.randomRange(1, 100) <= banner.getEventChance(rarity));  // Won this coinflip
-		if (pullFeatured && (featured.length > 0)) {
-			itemId = getRandom(featured);
-			gachaInfo.setFailedFeaturedItemPulls(rarity, 0);
+		boolean epitomized = (banner.hasEpitomized()) && (rarity == 5) && (gachaInfo.getWishItemId() != 0);
+		boolean pityEpitomized = (gachaInfo.getFailedChosenItemPulls() >= banner.getWishMaxProgress());  // Maximum fate points reached
+		boolean pityFeatured = (gachaInfo.getFailedFeaturedItemPulls(rarity) >= 1);  // Lost previous coinflip
+		boolean rollFeatured = (this.randomRange(1, 100) <= banner.getEventChance(rarity));  // Won this coinflip
+		boolean pullFeatured = pityFeatured || rollFeatured;
+
+		if (epitomized && pityEpitomized) {  // Auto pick item when epitomized points reached
+			gachaInfo.setFailedFeaturedItemPulls(rarity, 0);  // Epitomized item will always be a featured one
+			itemId = gachaInfo.getWishItemId();
 		} else {
-			gachaInfo.addFailedFeaturedItemPulls(rarity, 1);
-			if (fallback1.length < 1) {
-				if (fallback2.length < 1) {
-					itemId = getRandom((rarity==5)? fallbackItems5Pool2Default : fallbackItems4Pool2Default);
-				} else {
-					itemId = getRandom(fallback2);
-				}
-			} else if (fallback2.length < 1) {
-				itemId = getRandom(fallback1);
-			} else {  // Both pools are possible, use the pool balancer
-				int pityPool1 = banner.getPoolBalanceWeight(rarity, gachaInfo.getPityPool(rarity, 1));
-				int pityPool2 = banner.getPoolBalanceWeight(rarity, gachaInfo.getPityPool(rarity, 2));
-				int chosenPool = switch ((pityPool1 >= pityPool2)? 1 : 0) {  // Larger weight must come first for the hard cutoff to function correctly
-					case 1 -> 1 + drawRoulette(new int[] {pityPool1, pityPool2}, 10000);
-					default -> 2 - drawRoulette(new int[] {pityPool2, pityPool1}, 10000);
-				};
-				itemId = switch (chosenPool) {
-					case 1:
-						gachaInfo.setPityPool(rarity, 1, 0);
-						yield getRandom(fallback1);
-					default:
-						gachaInfo.setPityPool(rarity, 2, 0);
-						yield getRandom(fallback2);
-				};
+			if (pullFeatured && (featured.length > 0)) {
+				gachaInfo.setFailedFeaturedItemPulls(rarity, 0);
+				itemId = getRandom(featured);
+			} else {
+				gachaInfo.addFailedFeaturedItemPulls(rarity, 1);  // This could be moved into doFallbackRarePull but having it here makes it clearer
+				itemId = doFallbackRarePull(fallback1, fallback2, rarity, banner, gachaInfo);
+			}
+		}
+
+		if (epitomized) {
+			if(itemId == gachaInfo.getWishItemId()) { // Reset epitomized points when got wished item
+				gachaInfo.setFailedChosenItemPulls(0);
+			} else { // Add epitomized points if not get wished item
+				gachaInfo.addFailedChosenItemPulls(1);
 			}
 		}
 		return itemId;
@@ -356,7 +378,7 @@ public class GachaManager {
 		}
 		
 		// Packets
-		player.sendPacket(new PacketDoGachaRsp(banner, list));
+		player.sendPacket(new PacketDoGachaRsp(banner, list, gachaInfo));
 	}
 
 	private synchronized void startWatcher(GameServer server) {

src/main/java/emu/grasscutter/game/gacha/PlayerGachaBannerInfo.java

@@ -12,6 +12,9 @@ public class PlayerGachaBannerInfo {
 	private int pity5Pool2 = 0;
 	private int pity4Pool1 = 0;
 	private int pity4Pool2 = 0;
+
+	private int failedChosenItemPulls = 0;
+	private int wishItemId = 0;
 	
 	public int getPity5() {
 		return pity5;
@@ -36,6 +39,26 @@ public class PlayerGachaBannerInfo {
 	public void addPity4(int amount) {
 		this.pity4 += amount;
 	}
+
+	public int getWishItemId() {
+		return wishItemId;
+	}
+
+	public void setWishItemId(int wishItemId) {
+		this.wishItemId = wishItemId;
+	}
+
+	public int getFailedChosenItemPulls() {
+		return failedChosenItemPulls;
+	}
+
+	public void setFailedChosenItemPulls(int amount) {
+		failedChosenItemPulls = amount;
+	}
+
+	public void addFailedChosenItemPulls(int amount) {
+		failedChosenItemPulls += amount;
+	}
 	
 	public int getFailedFeaturedItemPulls(int rarity) {
 		return switch (rarity) {

src/main/java/emu/grasscutter/server/packet/recv/HandlerGachaWishReq.java

+package emu.grasscutter.server.packet.recv;
+
+import emu.grasscutter.game.gacha.GachaBanner;
+import emu.grasscutter.game.gacha.PlayerGachaBannerInfo;
+import emu.grasscutter.net.packet.Opcodes;
+import emu.grasscutter.net.packet.PacketHandler;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.GachaWishReqOuterClass.GachaWishReq;
+import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketGachaWishRsp;
+
+@Opcodes(PacketOpcodes.GachaWishReq)
+public class HandlerGachaWishReq extends PacketHandler {
+
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] payload) throws Exception {
+        GachaWishReq req = GachaWishReq.parseFrom(payload);
+
+        GachaBanner banner = session.getServer().getGachaManager().getGachaBanners().get(req.getGachaScheduleId());
+        PlayerGachaBannerInfo gachaInfo = session.getPlayer().getGachaInfo().getBannerInfo(banner);
+
+        gachaInfo.setFailedChosenItemPulls(0);
+        gachaInfo.setWishItemId(req.getItemId());
+
+        session.send(new PacketGachaWishRsp(req.getGachaType(), req.getGachaScheduleId(), req.getItemId(), 0, banner.getWishMaxProgress()));
+    }
+
+}

src/main/java/emu/grasscutter/server/packet/recv/HandlerGetGachaInfoReq.java

 package emu.grasscutter.server.packet.recv;
 
+import emu.grasscutter.game.gacha.GachaBanner;
+import emu.grasscutter.game.gacha.PlayerGachaBannerInfo;
 import emu.grasscutter.net.packet.Opcodes;
 import emu.grasscutter.net.packet.PacketOpcodes;
 import emu.grasscutter.net.packet.PacketHandler;
 import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketGachaWishRsp;
 import emu.grasscutter.server.packet.send.PacketGetGachaInfoRsp;
 
 @Opcodes(PacketOpcodes.GetGachaInfoReq)

src/main/java/emu/grasscutter/server/packet/send/PacketDoGachaRsp.java

@@ -4,6 +4,7 @@ import java.util.List;
 
 import emu.grasscutter.data.common.ItemParamData;
 import emu.grasscutter.game.gacha.GachaBanner;
+import emu.grasscutter.game.gacha.PlayerGachaBannerInfo;
 import emu.grasscutter.net.packet.BasePacket;
 import emu.grasscutter.net.packet.PacketOpcodes;
 import emu.grasscutter.net.proto.DoGachaRspOuterClass.DoGachaRsp;
@@ -13,12 +14,12 @@ import emu.grasscutter.net.proto.RetcodeOuterClass;
 
 public class PacketDoGachaRsp extends BasePacket {
 	
-	public PacketDoGachaRsp(GachaBanner banner, List<GachaItem> list) {
+	public PacketDoGachaRsp(GachaBanner banner, List<GachaItem> list, PlayerGachaBannerInfo gachaInfo) {
 		super(PacketOpcodes.DoGachaRsp);
 
 		ItemParamData costItem = banner.getCost(1);
 		ItemParamData costItem10 = banner.getCost(10);
-		DoGachaRsp p = DoGachaRsp.newBuilder()
+		DoGachaRsp.Builder rsp = DoGachaRsp.newBuilder()
 				.setGachaType(banner.getGachaType())
 				.setGachaScheduleId(banner.getScheduleId())
 				.setGachaTimes(list.size())
@@ -28,10 +29,15 @@ public class PacketDoGachaRsp extends BasePacket {
 	            .setCostItemNum(costItem.getCount())
 	            .setTenCostItemId(costItem10.getId())
 	            .setTenCostItemNum(costItem10.getCount())
-	            .addAllGachaItemList(list)
-				.build();
+	            .addAllGachaItemList(list);
+
+		if(banner.hasEpitomized()) {
+			rsp.setWishItemId(gachaInfo.getWishItemId())
+				.setWishProgress(gachaInfo.getFailedChosenItemPulls())
+				.setWishMaxProgress(banner.getWishMaxProgress());
+		}
 		
-		this.setData(p);
+		this.setData(rsp.build());
 	}
 
 	public PacketDoGachaRsp() {

src/main/java/emu/grasscutter/server/packet/send/PacketGachaWishRsp.java

+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.net.packet.BasePacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.GachaWishRspOuterClass.GachaWishRsp;
+
+public class PacketGachaWishRsp extends BasePacket {
+
+    public PacketGachaWishRsp(int gachaType, int scheduleId, int itemId, int progress, int maxProgress) {
+        super(PacketOpcodes.GachaWishRsp);
+
+        GachaWishRsp proto = GachaWishRsp.newBuilder()
+                .setGachaType(gachaType)
+                .setGachaScheduleId(scheduleId)
+                .setWishItemId(itemId)
+                .setWishProgress(progress)
+                .setWishMaxProgress(maxProgress)
+                .build();
+
+        this.setData(proto);
+    }
+
+}