rework shop

backend/app/api/v1/shop.py

@@ -181,18 +181,29 @@ async def use_consumable(
     # Get participant
     participant = await require_participant(db, current_user.id, data.marathon_id)
 
-    # For skip and reroll, we need the assignment
+    # For some consumables, we need the assignment
     assignment = None
-    if data.item_code in ["skip", "reroll"]:
+    if data.item_code in ["skip", "wild_card", "copycat"]:
         if not data.assignment_id:
-            raise HTTPException(status_code=400, detail="assignment_id is required for skip/reroll")
+            raise HTTPException(status_code=400, detail=f"assignment_id is required for {data.item_code}")
 
-        result = await db.execute(
-            select(Assignment).where(
-                Assignment.id == data.assignment_id,
-                Assignment.participant_id == participant.id,
+        # For copycat, we need bonus_assignments to properly handle playthrough
+        if data.item_code == "copycat":
+            result = await db.execute(
+                select(Assignment)
+                .options(selectinload(Assignment.bonus_assignments))
+                .where(
+                    Assignment.id == data.assignment_id,
+                    Assignment.participant_id == participant.id,
+                )
+            )
+        else:
+            result = await db.execute(
+                select(Assignment).where(
+                    Assignment.id == data.assignment_id,
+                    Assignment.participant_id == participant.id,
+                )
             )
-        )
         assignment = result.scalar_one_or_none()
         if not assignment:
             raise HTTPException(status_code=404, detail="Assignment not found")
@@ -201,15 +212,29 @@ async def use_consumable(
     if data.item_code == "skip":
         effect = await consumables_service.use_skip(db, current_user, participant, marathon, assignment)
         effect_description = "Assignment skipped without penalty"
-    elif data.item_code == "shield":
-        effect = await consumables_service.use_shield(db, current_user, participant, marathon)
-        effect_description = "Shield activated - next drop will be free"
     elif data.item_code == "boost":
         effect = await consumables_service.use_boost(db, current_user, participant, marathon)
-        effect_description = f"Boost x{effect['multiplier']} activated for next complete"
-    elif data.item_code == "reroll":
-        effect = await consumables_service.use_reroll(db, current_user, participant, marathon, assignment)
-        effect_description = "Assignment rerolled - you can spin again"
+        effect_description = f"Boost x{effect['multiplier']} activated for current assignment"
+    elif data.item_code == "wild_card":
+        if data.game_id is None:
+            raise HTTPException(status_code=400, detail="game_id is required for wild_card")
+        effect = await consumables_service.use_wild_card(
+            db, current_user, participant, marathon, assignment, data.game_id
+        )
+        effect_description = f"New challenge from {effect['game_name']}: {effect['challenge_title']}"
+    elif data.item_code == "lucky_dice":
+        effect = await consumables_service.use_lucky_dice(db, current_user, participant, marathon)
+        effect_description = f"Lucky Dice rolled: x{effect['multiplier']} multiplier"
+    elif data.item_code == "copycat":
+        if data.target_participant_id is None:
+            raise HTTPException(status_code=400, detail="target_participant_id is required for copycat")
+        effect = await consumables_service.use_copycat(
+            db, current_user, participant, marathon, assignment, data.target_participant_id
+        )
+        effect_description = f"Copied challenge: {effect['challenge_title']}"
+    elif data.item_code == "undo":
+        effect = await consumables_service.use_undo(db, current_user, participant, marathon)
+        effect_description = f"Restored {effect['points_restored']} points and streak {effect['streak_restored']}"
     else:
         raise HTTPException(status_code=400, detail=f"Unknown consumable: {data.item_code}")
 
@@ -243,9 +268,11 @@ async def get_consumables_status(
 
     # Get inventory counts for all consumables
     skips_available = await consumables_service.get_consumable_count(db, current_user.id, "skip")
-    shields_available = await consumables_service.get_consumable_count(db, current_user.id, "shield")
     boosts_available = await consumables_service.get_consumable_count(db, current_user.id, "boost")
-    rerolls_available = await consumables_service.get_consumable_count(db, current_user.id, "reroll")
+    wild_cards_available = await consumables_service.get_consumable_count(db, current_user.id, "wild_card")
+    lucky_dice_available = await consumables_service.get_consumable_count(db, current_user.id, "lucky_dice")
+    copycats_available = await consumables_service.get_consumable_count(db, current_user.id, "copycat")
+    undos_available = await consumables_service.get_consumable_count(db, current_user.id, "undo")
 
     # Calculate remaining skips for this marathon
     skips_remaining = None
@@ -256,12 +283,16 @@ async def get_consumables_status(
         skips_available=skips_available,
         skips_used=participant.skips_used,
         skips_remaining=skips_remaining,
-        shields_available=shields_available,
-        has_shield=participant.has_shield,
         boosts_available=boosts_available,
         has_active_boost=participant.has_active_boost,
         boost_multiplier=consumables_service.BOOST_MULTIPLIER if participant.has_active_boost else None,
-        rerolls_available=rerolls_available,
+        wild_cards_available=wild_cards_available,
+        lucky_dice_available=lucky_dice_available,
+        has_lucky_dice=participant.has_lucky_dice,
+        lucky_dice_multiplier=participant.lucky_dice_multiplier,
+        copycats_available=copycats_available,
+        undos_available=undos_available,
+        can_undo=participant.can_undo,
     )
 
 

backend/app/api/v1/wheel.py

@@ -621,10 +621,12 @@ async def complete_assignment(
                 if ba.status == BonusAssignmentStatus.COMPLETED.value:
                     ba.points_earned = int(ba.challenge.points * multiplier)
 
-        # Apply boost multiplier from consumable
+        # Apply boost and lucky dice multipliers from consumables
         boost_multiplier = consumables_service.consume_boost_on_complete(participant)
-        if boost_multiplier > 1.0:
-            total_points = int(total_points * boost_multiplier)
+        lucky_dice_multiplier = consumables_service.consume_lucky_dice_on_complete(participant)
+        combined_multiplier = boost_multiplier * lucky_dice_multiplier
+        if combined_multiplier != 1.0:
+            total_points = int(total_points * combined_multiplier)
 
         # Update assignment
         assignment.status = AssignmentStatus.COMPLETED.value
@@ -666,6 +668,8 @@ async def complete_assignment(
             activity_data["is_redo"] = True
         if boost_multiplier > 1.0:
             activity_data["boost_multiplier"] = boost_multiplier
+        if lucky_dice_multiplier != 1.0:
+            activity_data["lucky_dice_multiplier"] = lucky_dice_multiplier
         if coins_earned > 0:
             activity_data["coins_earned"] = coins_earned
         if playthrough_event:
@@ -728,10 +732,12 @@ async def complete_assignment(
         total_points += common_enemy_bonus
         print(f"[COMMON_ENEMY] bonus={common_enemy_bonus}, closed={common_enemy_closed}, winners={common_enemy_winners}")
 
-    # Apply boost multiplier from consumable
+    # Apply boost and lucky dice multipliers from consumables
     boost_multiplier = consumables_service.consume_boost_on_complete(participant)
-    if boost_multiplier > 1.0:
-        total_points = int(total_points * boost_multiplier)
+    lucky_dice_multiplier = consumables_service.consume_lucky_dice_on_complete(participant)
+    combined_multiplier = boost_multiplier * lucky_dice_multiplier
+    if combined_multiplier != 1.0:
+        total_points = int(total_points * combined_multiplier)
 
     # Update assignment
     assignment.status = AssignmentStatus.COMPLETED.value
@@ -772,6 +778,8 @@ async def complete_assignment(
         activity_data["is_redo"] = True
     if boost_multiplier > 1.0:
         activity_data["boost_multiplier"] = boost_multiplier
+    if lucky_dice_multiplier != 1.0:
+        activity_data["lucky_dice_multiplier"] = lucky_dice_multiplier
     if coins_earned > 0:
         activity_data["coins_earned"] = coins_earned
     if assignment.event_type == EventType.JACKPOT.value:
@@ -887,11 +895,10 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
             participant.drop_count, game.playthrough_points, playthrough_event
         )
 
-        # Check for shield - if active, no penalty
-        shield_used = False
-        if consumables_service.consume_shield(participant):
-            penalty = 0
-            shield_used = True
+        # Save drop data for potential undo
+        consumables_service.save_drop_for_undo(
+            participant, penalty, participant.current_streak
+        )
 
         # Update assignment
         assignment.status = AssignmentStatus.DROPPED.value
@@ -921,8 +928,6 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
             "penalty": penalty,
             "lost_bonuses": completed_bonuses_count,
         }
-        if shield_used:
-            activity_data["shield_used"] = True
         if playthrough_event:
             activity_data["event_type"] = playthrough_event.type
             activity_data["free_drop"] = True
@@ -941,7 +946,6 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
             penalty=penalty,
             total_points=participant.total_points,
             new_drop_count=participant.drop_count,
-            shield_used=shield_used,
         )
 
     # Regular challenge drop
@@ -953,11 +957,10 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
     # Calculate penalty (0 if double_risk event is active)
     penalty = points_service.calculate_drop_penalty(participant.drop_count, assignment.challenge.points, active_event)
 
-    # Check for shield - if active, no penalty
-    shield_used = False
-    if consumables_service.consume_shield(participant):
-        penalty = 0
-        shield_used = True
+    # Save drop data for potential undo
+    consumables_service.save_drop_for_undo(
+        participant, penalty, participant.current_streak
+    )
 
     # Update assignment
     assignment.status = AssignmentStatus.DROPPED.value
@@ -975,8 +978,6 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
         "difficulty": assignment.challenge.difficulty,
         "penalty": penalty,
     }
-    if shield_used:
-        activity_data["shield_used"] = True
     if active_event:
         activity_data["event_type"] = active_event.type
         if active_event.type == EventType.DOUBLE_RISK.value:
@@ -996,7 +997,6 @@ async def drop_assignment(assignment_id: int, current_user: CurrentUser, db: DbS
         penalty=penalty,
         total_points=participant.total_points,
         new_drop_count=participant.drop_count,
-        shield_used=shield_used,
     )
 
 

backend/app/models/participant.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 from enum import Enum
-from sqlalchemy import DateTime, ForeignKey, Integer, String, UniqueConstraint, Boolean
+from sqlalchemy import DateTime, ForeignKey, Integer, String, UniqueConstraint, Boolean, Float
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.database import Base
@@ -32,7 +32,15 @@ class Participant(Base):
     # Shop: consumables state
     skips_used: Mapped[int] = mapped_column(Integer, default=0)
     has_active_boost: Mapped[bool] = mapped_column(Boolean, default=False)
-    has_shield: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    # Lucky Dice state
+    has_lucky_dice: Mapped[bool] = mapped_column(Boolean, default=False)
+    lucky_dice_multiplier: Mapped[float | None] = mapped_column(Float, nullable=True)
+
+    # Undo state - stores last drop data for potential rollback
+    last_drop_points: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    last_drop_streak_before: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    can_undo: Mapped[bool] = mapped_column(Boolean, default=False)
 
     # Relationships
     user: Mapped["User"] = relationship("User", back_populates="participations")

backend/app/models/shop.py

@@ -28,9 +28,11 @@ class ItemRarity(str, Enum):
 
 class ConsumableType(str, Enum):
     SKIP = "skip"
-    SHIELD = "shield"
     BOOST = "boost"
-    REROLL = "reroll"
+    WILD_CARD = "wild_card"
+    LUCKY_DICE = "lucky_dice"
+    COPYCAT = "copycat"
+    UNDO = "undo"
 
 
 class ShopItem(Base):

backend/app/schemas/assignment.py

@@ -86,7 +86,6 @@ class DropResult(BaseModel):
     penalty: int
     total_points: int
     new_drop_count: int
-    shield_used: bool = False  # Whether shield consumable was used to prevent penalty
 
 
 class EventAssignmentResponse(BaseModel):

backend/app/schemas/marathon.py

@@ -43,10 +43,10 @@ class ParticipantInfo(BaseModel):
     # Shop: coins and consumables status
     coins_earned: int = 0
     skips_used: int = 0
-    has_shield: bool = False
     has_active_boost: bool = False
-    boost_multiplier: float | None = None
-    boost_expires_at: datetime | None = None
+    has_lucky_dice: bool = False
+    lucky_dice_multiplier: float | None = None
+    can_undo: bool = False
 
     class Config:
         from_attributes = True

backend/app/schemas/shop.py

@@ -94,9 +94,11 @@ class PurchaseResponse(BaseModel):
 
 class UseConsumableRequest(BaseModel):
     """Schema for using a consumable"""
-    item_code: str  # 'skip', 'shield', 'boost', 'reroll'
+    item_code: str  # 'skip', 'boost', 'wild_card', 'lucky_dice', 'copycat', 'undo'
     marathon_id: int
-    assignment_id: int | None = None  # Required for skip and reroll
+    assignment_id: int | None = None  # Required for skip, wild_card, copycat
+    game_id: int | None = None  # Required for wild_card
+    target_participant_id: int | None = None  # Required for copycat
 
 
 class UseConsumableResponse(BaseModel):
@@ -192,9 +194,13 @@ class ConsumablesStatusResponse(BaseModel):
     skips_available: int  # From inventory
     skips_used: int  # In this marathon
     skips_remaining: int | None  # Based on marathon limit
-    shields_available: int  # From inventory
-    has_shield: bool  # Currently activated
     boosts_available: int  # From inventory
-    has_active_boost: bool  # Currently activated (one-time for next complete)
+    has_active_boost: bool  # Currently activated (one-time for current assignment)
     boost_multiplier: float | None  # 1.5 if boost active
-    rerolls_available: int  # From inventory
+    wild_cards_available: int  # From inventory
+    lucky_dice_available: int  # From inventory
+    has_lucky_dice: bool  # Currently activated
+    lucky_dice_multiplier: float | None  # Rolled multiplier if active
+    copycats_available: int  # From inventory
+    undos_available: int  # From inventory
+    can_undo: bool  # Has drop data to undo

backend/app/services/coins.py

@@ -14,19 +14,19 @@ class CoinsService:
 
     # Coins awarded per challenge difficulty (only in certified marathons)
     CHALLENGE_COINS = {
-        Difficulty.EASY.value: 5,
-        Difficulty.MEDIUM.value: 12,
-        Difficulty.HARD.value: 25,
+        Difficulty.EASY.value: 10,
+        Difficulty.MEDIUM.value: 20,
+        Difficulty.HARD.value: 35,
     }
 
     # Coins for playthrough = points * this ratio
-    PLAYTHROUGH_COIN_RATIO = 0.05  # 5% of points
+    PLAYTHROUGH_COIN_RATIO = 0.10  # 10% of points
 
     # Coins awarded for marathon placements
     MARATHON_PLACE_COINS = {
-        1: 100,  # 1st place
-        2: 50,   # 2nd place
-        3: 30,   # 3rd place
+        1: 500,  # 1st place
+        2: 250,  # 2nd place
+        3: 150,  # 3rd place
     }
 
     # Bonus coins for Common Enemy event winners

backend/app/services/consumables.py

@@ -1,15 +1,25 @@
 """
-Consumables Service - handles consumable items usage (skip, shield, boost, reroll)
+Consumables Service - handles consumable items usage
+
+Consumables:
+- skip: Skip current assignment without penalty
+- boost: x1.5 multiplier for current assignment
+- wild_card: Choose a game, get random challenge from it
+- lucky_dice: Random multiplier (0.5, 1.0, 1.5, 2.0, 2.5, 3.0)
+- copycat: Copy another participant's assignment
+- undo: Restore points and streak from last drop
 """
+import random
 from datetime import datetime
 from fastapi import HTTPException
-from sqlalchemy import select
+from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
 from app.models import (
     User, Participant, Marathon, Assignment, AssignmentStatus,
-    ShopItem, UserInventory, ConsumableUsage, ConsumableType
+    ShopItem, UserInventory, ConsumableUsage, ConsumableType, Game, Challenge,
+    BonusAssignment
 )
 
 
@@ -19,6 +29,9 @@ class ConsumablesService:
     # Boost settings
     BOOST_MULTIPLIER = 1.5
 
+    # Lucky Dice multipliers (equal probability, starts from 1.5x)
+    LUCKY_DICE_MULTIPLIERS = [1.5, 2.0, 2.5, 3.0, 3.5, 4.0]
+
     async def use_skip(
         self,
         db: AsyncSession,
@@ -85,53 +98,6 @@ class ConsumablesService:
             "streak_preserved": True,
         }
 
-    async def use_shield(
-        self,
-        db: AsyncSession,
-        user: User,
-        participant: Participant,
-        marathon: Marathon,
-    ) -> dict:
-        """
-        Activate a Shield - protects from next drop penalty.
-
-        - Next drop will not cause point penalty
-        - Streak is preserved on next drop
-
-        Returns: dict with result info
-
-        Raises:
-            HTTPException: If consumables not allowed or shield already active
-        """
-        if not marathon.allow_consumables:
-            raise HTTPException(status_code=400, detail="Consumables are not allowed in this marathon")
-
-        if participant.has_shield:
-            raise HTTPException(status_code=400, detail="Shield is already active")
-
-        # Consume shield from inventory
-        item = await self._consume_item(db, user, ConsumableType.SHIELD.value)
-
-        # Activate shield
-        participant.has_shield = True
-
-        # Log usage
-        usage = ConsumableUsage(
-            user_id=user.id,
-            item_id=item.id,
-            marathon_id=marathon.id,
-            effect_data={
-                "type": "shield",
-                "activated": True,
-            },
-        )
-        db.add(usage)
-
-        return {
-            "success": True,
-            "shield_activated": True,
-        }
-
     async def use_boost(
         self,
         db: AsyncSession,
@@ -140,10 +106,10 @@ class ConsumablesService:
         marathon: Marathon,
     ) -> dict:
         """
-        Activate a Boost - multiplies points for NEXT complete only.
+        Activate a Boost - multiplies points for current assignment on complete.
 
-        - Points for next completed challenge are multiplied by BOOST_MULTIPLIER
-        - One-time use (consumed on next complete)
+        - Points for completed challenge are multiplied by BOOST_MULTIPLIER
+        - One-time use (consumed on complete)
 
         Returns: dict with result info
 
@@ -181,41 +147,71 @@ class ConsumablesService:
             "multiplier": self.BOOST_MULTIPLIER,
         }
 
-    async def use_reroll(
+    async def use_wild_card(
         self,
         db: AsyncSession,
         user: User,
         participant: Participant,
         marathon: Marathon,
         assignment: Assignment,
+        game_id: int,
     ) -> dict:
         """
-        Use a Reroll - discard current assignment and spin again.
+        Use Wild Card - choose a game and get a random challenge from it.
 
-        - Current assignment is cancelled (not dropped)
-        - User can spin the wheel again
-        - No penalty
+        - Current assignment is replaced
+        - New challenge is randomly selected from the chosen game
+        - Game must be in the marathon
 
-        Returns: dict with result info
+        Returns: dict with new assignment info
 
         Raises:
-            HTTPException: If consumables not allowed or assignment not active
+            HTTPException: If game not in marathon or no challenges available
         """
         if not marathon.allow_consumables:
             raise HTTPException(status_code=400, detail="Consumables are not allowed in this marathon")
 
         if assignment.status != AssignmentStatus.ACTIVE.value:
-            raise HTTPException(status_code=400, detail="Can only reroll active assignments")
+            raise HTTPException(status_code=400, detail="Can only use wild card on active assignments")
 
-        # Consume reroll from inventory
-        item = await self._consume_item(db, user, ConsumableType.REROLL.value)
+        # Verify game is in this marathon
+        result = await db.execute(
+            select(Game)
+            .where(
+                Game.id == game_id,
+                Game.marathon_id == marathon.id,
+            )
+        )
+        game = result.scalar_one_or_none()
 
-        # Cancel current assignment
-        old_challenge_id = assignment.challenge_id
+        if not game:
+            raise HTTPException(status_code=400, detail="Game not found in this marathon")
+
+        # Get random challenge from this game
+        result = await db.execute(
+            select(Challenge)
+            .where(Challenge.game_id == game_id)
+            .order_by(func.random())
+            .limit(1)
+        )
+        new_challenge = result.scalar_one_or_none()
+
+        if not new_challenge:
+            raise HTTPException(status_code=400, detail="No challenges available for this game")
+
+        # Consume wild card from inventory
+        item = await self._consume_item(db, user, ConsumableType.WILD_CARD.value)
+
+        # Store old assignment info for logging
         old_game_id = assignment.game_id
-        assignment.status = AssignmentStatus.DROPPED.value
-        assignment.completed_at = datetime.utcnow()
-        # Note: We do NOT increase drop_count (this is a reroll, not a real drop)
+        old_challenge_id = assignment.challenge_id
+
+        # Update assignment with new challenge
+        assignment.game_id = game_id
+        assignment.challenge_id = new_challenge.id
+        # Reset timestamps since it's a new challenge
+        assignment.started_at = datetime.utcnow()
+        assignment.deadline = None  # Will be recalculated if needed
 
         # Log usage
         usage = ConsumableUsage(
@@ -224,17 +220,275 @@ class ConsumablesService:
             marathon_id=marathon.id,
             assignment_id=assignment.id,
             effect_data={
-                "type": "reroll",
-                "rerolled_from_challenge_id": old_challenge_id,
-                "rerolled_from_game_id": old_game_id,
+                "type": "wild_card",
+                "old_game_id": old_game_id,
+                "old_challenge_id": old_challenge_id,
+                "new_game_id": game_id,
+                "new_challenge_id": new_challenge.id,
             },
         )
         db.add(usage)
 
         return {
             "success": True,
-            "rerolled": True,
-            "can_spin_again": True,
+            "game_id": game_id,
+            "game_name": game.name,
+            "challenge_id": new_challenge.id,
+            "challenge_title": new_challenge.title,
+        }
+
+    async def use_lucky_dice(
+        self,
+        db: AsyncSession,
+        user: User,
+        participant: Participant,
+        marathon: Marathon,
+    ) -> dict:
+        """
+        Use Lucky Dice - get a random multiplier for current assignment.
+
+        - Random multiplier from [0.5, 1.0, 1.5, 2.0, 2.5, 3.0]
+        - Applied on next complete (stacks with boost if both active)
+        - One-time use
+
+        Returns: dict with rolled multiplier
+
+        Raises:
+            HTTPException: If consumables not allowed or lucky dice already active
+        """
+        if not marathon.allow_consumables:
+            raise HTTPException(status_code=400, detail="Consumables are not allowed in this marathon")
+
+        if participant.has_lucky_dice:
+            raise HTTPException(status_code=400, detail="Lucky Dice is already active")
+
+        # Consume lucky dice from inventory
+        item = await self._consume_item(db, user, ConsumableType.LUCKY_DICE.value)
+
+        # Roll the dice
+        multiplier = random.choice(self.LUCKY_DICE_MULTIPLIERS)
+
+        # Activate lucky dice
+        participant.has_lucky_dice = True
+        participant.lucky_dice_multiplier = multiplier
+
+        # Log usage
+        usage = ConsumableUsage(
+            user_id=user.id,
+            item_id=item.id,
+            marathon_id=marathon.id,
+            effect_data={
+                "type": "lucky_dice",
+                "multiplier": multiplier,
+            },
+        )
+        db.add(usage)
+
+        return {
+            "success": True,
+            "lucky_dice_activated": True,
+            "multiplier": multiplier,
+        }
+
+    async def use_copycat(
+        self,
+        db: AsyncSession,
+        user: User,
+        participant: Participant,
+        marathon: Marathon,
+        assignment: Assignment,
+        target_participant_id: int,
+    ) -> dict:
+        """
+        Use Copycat - copy another participant's assignment.
+
+        - Current assignment is replaced with target's current/last assignment
+        - Can copy even if target already completed theirs
+        - Cannot copy your own assignment
+
+        Returns: dict with copied assignment info
+
+        Raises:
+            HTTPException: If target not found or no assignment to copy
+        """
+        if not marathon.allow_consumables:
+            raise HTTPException(status_code=400, detail="Consumables are not allowed in this marathon")
+
+        if assignment.status != AssignmentStatus.ACTIVE.value:
+            raise HTTPException(status_code=400, detail="Can only use copycat on active assignments")
+
+        if target_participant_id == participant.id:
+            raise HTTPException(status_code=400, detail="Cannot copy your own assignment")
+
+        # Find target participant
+        result = await db.execute(
+            select(Participant)
+            .where(
+                Participant.id == target_participant_id,
+                Participant.marathon_id == marathon.id,
+            )
+        )
+        target_participant = result.scalar_one_or_none()
+
+        if not target_participant:
+            raise HTTPException(status_code=400, detail="Target participant not found")
+
+        # Get target's most recent assignment (active or completed)
+        result = await db.execute(
+            select(Assignment)
+            .options(
+                selectinload(Assignment.challenge),
+                selectinload(Assignment.game).selectinload(Game.challenges),
+            )
+            .where(
+                Assignment.participant_id == target_participant_id,
+                Assignment.status.in_([
+                    AssignmentStatus.ACTIVE.value,
+                    AssignmentStatus.COMPLETED.value
+                ])
+            )
+            .order_by(Assignment.started_at.desc())
+            .limit(1)
+        )
+        target_assignment = result.scalar_one_or_none()
+
+        if not target_assignment:
+            raise HTTPException(status_code=400, detail="Target has no assignment to copy")
+
+        # Consume copycat from inventory
+        item = await self._consume_item(db, user, ConsumableType.COPYCAT.value)
+
+        # Store old assignment info for logging
+        old_game_id = assignment.game_id
+        old_challenge_id = assignment.challenge_id
+        old_is_playthrough = assignment.is_playthrough
+
+        # Copy the assignment - handle both challenge and playthrough
+        assignment.game_id = target_assignment.game_id
+        assignment.challenge_id = target_assignment.challenge_id
+        assignment.is_playthrough = target_assignment.is_playthrough
+        # Reset timestamps
+        assignment.started_at = datetime.utcnow()
+        assignment.deadline = None
+
+        # If copying a playthrough, recreate bonus assignments
+        if target_assignment.is_playthrough:
+            # Delete existing bonus assignments
+            for ba in assignment.bonus_assignments:
+                await db.delete(ba)
+
+            # Create new bonus assignments from target game's challenges
+            if target_assignment.game and target_assignment.game.challenges:
+                for ch in target_assignment.game.challenges:
+                    bonus = BonusAssignment(
+                        main_assignment_id=assignment.id,
+                        challenge_id=ch.id,
+                    )
+                    db.add(bonus)
+
+        # Log usage
+        usage = ConsumableUsage(
+            user_id=user.id,
+            item_id=item.id,
+            marathon_id=marathon.id,
+            assignment_id=assignment.id,
+            effect_data={
+                "type": "copycat",
+                "old_challenge_id": old_challenge_id,
+                "old_game_id": old_game_id,
+                "old_is_playthrough": old_is_playthrough,
+                "copied_from_participant_id": target_participant_id,
+                "new_challenge_id": target_assignment.challenge_id,
+                "new_game_id": target_assignment.game_id,
+                "new_is_playthrough": target_assignment.is_playthrough,
+            },
+        )
+        db.add(usage)
+
+        # Prepare response
+        if target_assignment.is_playthrough:
+            title = f"Прохождение: {target_assignment.game.title}" if target_assignment.game else "Прохождение"
+        else:
+            title = target_assignment.challenge.title if target_assignment.challenge else None
+
+        return {
+            "success": True,
+            "copied": True,
+            "game_id": target_assignment.game_id,
+            "challenge_id": target_assignment.challenge_id,
+            "is_playthrough": target_assignment.is_playthrough,
+            "challenge_title": title,
+        }
+
+    async def use_undo(
+        self,
+        db: AsyncSession,
+        user: User,
+        participant: Participant,
+        marathon: Marathon,
+    ) -> dict:
+        """
+        Use Undo - restore points and streak from last drop.
+
+        - Only works if there was a drop in this marathon
+        - Can only undo once per drop
+        - Restores both points and streak
+
+        Returns: dict with restored values
+
+        Raises:
+            HTTPException: If no drop to undo
+        """
+        if not marathon.allow_consumables:
+            raise HTTPException(status_code=400, detail="Consumables are not allowed in this marathon")
+
+        if not participant.can_undo:
+            raise HTTPException(status_code=400, detail="No drop to undo")
+
+        if participant.last_drop_points is None or participant.last_drop_streak_before is None:
+            raise HTTPException(status_code=400, detail="No drop data to restore")
+
+        # Consume undo from inventory
+        item = await self._consume_item(db, user, ConsumableType.UNDO.value)
+
+        # Store values for logging
+        points_restored = participant.last_drop_points
+        streak_restored = participant.last_drop_streak_before
+        current_points = participant.total_points
+        current_streak = participant.current_streak
+
+        # Restore points and streak
+        participant.total_points += points_restored
+        participant.current_streak = streak_restored
+        participant.drop_count = max(0, participant.drop_count - 1)
+
+        # Clear undo data
+        participant.can_undo = False
+        participant.last_drop_points = None
+        participant.last_drop_streak_before = None
+
+        # Log usage
+        usage = ConsumableUsage(
+            user_id=user.id,
+            item_id=item.id,
+            marathon_id=marathon.id,
+            effect_data={
+                "type": "undo",
+                "points_restored": points_restored,
+                "streak_restored_to": streak_restored,
+                "points_before": current_points,
+                "streak_before": current_streak,
+            },
+        )
+        db.add(usage)
+
+        return {
+            "success": True,
+            "undone": True,
+            "points_restored": points_restored,
+            "streak_restored": streak_restored,
+            "new_total_points": participant.total_points,
+            "new_streak": participant.current_streak,
         }
 
     async def _consume_item(
@@ -292,17 +546,6 @@ class ConsumablesService:
         quantity = result.scalar_one_or_none()
         return quantity or 0
 
-    def consume_shield(self, participant: Participant) -> bool:
-        """
-        Consume shield when dropping (called from wheel.py).
-
-        Returns: True if shield was consumed, False otherwise
-        """
-        if participant.has_shield:
-            participant.has_shield = False
-            return True
-        return False
-
     def consume_boost_on_complete(self, participant: Participant) -> float:
         """
         Consume boost when completing assignment (called from wheel.py).
@@ -315,6 +558,33 @@ class ConsumablesService:
             return self.BOOST_MULTIPLIER
         return 1.0
 
+    def consume_lucky_dice_on_complete(self, participant: Participant) -> float:
+        """
+        Consume lucky dice when completing assignment (called from wheel.py).
+        One-time use - consumed after single complete.
+
+        Returns: Multiplier value (rolled multiplier if active, 1.0 otherwise)
+        """
+        if participant.has_lucky_dice and participant.lucky_dice_multiplier is not None:
+            multiplier = participant.lucky_dice_multiplier
+            participant.has_lucky_dice = False
+            participant.lucky_dice_multiplier = None
+            return multiplier
+        return 1.0
+
+    def save_drop_for_undo(
+        self,
+        participant: Participant,
+        points_lost: int,
+        streak_before: int,
+    ) -> None:
+        """
+        Save drop data for potential undo (called from wheel.py before dropping).
+        """
+        participant.last_drop_points = points_lost
+        participant.last_drop_streak_before = streak_before
+        participant.can_undo = True
+
 
 # Singleton instance
 consumables_service = ConsumablesService()