initial

backend/app/models/challenge.py

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+from datetime import datetime
+from enum import Enum
+from sqlalchemy import String, Text, DateTime, ForeignKey, Integer, Boolean
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+
+
+class ChallengeType(str, Enum):
+    COMPLETION = "completion"
+    NO_DEATH = "no_death"
+    SPEEDRUN = "speedrun"
+    COLLECTION = "collection"
+    ACHIEVEMENT = "achievement"
+    CHALLENGE_RUN = "challenge_run"
+    SCORE_ATTACK = "score_attack"
+    TIME_TRIAL = "time_trial"
+
+
+class Difficulty(str, Enum):
+    EASY = "easy"
+    MEDIUM = "medium"
+    HARD = "hard"
+
+
+class ProofType(str, Enum):
+    SCREENSHOT = "screenshot"
+    VIDEO = "video"
+    STEAM = "steam"
+
+
+class Challenge(Base):
+    __tablename__ = "challenges"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    game_id: Mapped[int] = mapped_column(ForeignKey("games.id", ondelete="CASCADE"), index=True)
+    title: Mapped[str] = mapped_column(String(100), nullable=False)
+    description: Mapped[str] = mapped_column(Text, nullable=False)
+    type: Mapped[str] = mapped_column(String(30), nullable=False)
+    difficulty: Mapped[str] = mapped_column(String(10), nullable=False)
+    points: Mapped[int] = mapped_column(Integer, nullable=False)
+    estimated_time: Mapped[int | None] = mapped_column(Integer, nullable=True)  # in minutes
+    proof_type: Mapped[str] = mapped_column(String(20), nullable=False)
+    proof_hint: Mapped[str | None] = mapped_column(Text, nullable=True)
+    is_generated: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    game: Mapped["Game"] = relationship("Game", back_populates="challenges")
+    assignments: Mapped[list["Assignment"]] = relationship(
+        "Assignment",
+        back_populates="challenge"
+    )