from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

Base = declarative_base()


class Theme(Base):
    __tablename__ = "themes"
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String(100), nullable=False, unique=True)
    description = Column(Text)
    created_at = Column(DateTime, server_default=func.now())
    
    questions = relationship("Question", back_populates="theme")


class Question(Base):
    __tablename__ = "questions"
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    theme_id = Column(Integer, ForeignKey("themes.id"), nullable=False)
    question_text = Column(Text, nullable=False)
    correct_answer = Column(Text, nullable=False)
    hint = Column(Text)
    difficulty_level = Column(Integer, default=1)
    created_at = Column(DateTime, server_default=func.now())
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
    
    theme = relationship("Theme", back_populates="questions")
    game_answers = relationship("GameAnswer", back_populates="question")


class Player(Base):
    __tablename__ = "players"
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String(50), nullable=False)
    email = Column(String(100))
    created_at = Column(DateTime, server_default=func.now())
    
    game_sessions = relationship("GameSession", back_populates="player")


class GameSession(Base):
    __tablename__ = "game_sessions"
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    player_id = Column(Integer, ForeignKey("players.id"), nullable=False)
    started_at = Column(DateTime, server_default=func.now())
    ended_at = Column(DateTime)
    total_score = Column(Integer, default=0)
    questions_answered = Column(Integer, default=0)
    session_duration = Column(Integer, default=0)  # in seconds
    
    player = relationship("Player", back_populates="game_sessions")
    game_answers = relationship("GameAnswer", back_populates="session")


class GameAnswer(Base):
    __tablename__ = "game_answers"
    
    id = Column(Integer, primary_key=True, autoincrement=True)
    session_id = Column(Integer, ForeignKey("game_sessions.id"), nullable=False)
    question_id = Column(Integer, ForeignKey("questions.id"), nullable=False)
    attempt_number = Column(Integer, nullable=False)  # 1, 2, or 3
    user_answer = Column(Text)
    is_correct = Column(Boolean, default=False)
    hint_used = Column(Boolean, default=False)
    points_earned = Column(Integer, default=0)
    answered_at = Column(DateTime, server_default=func.now())
    
    session = relationship("GameSession", back_populates="game_answers")
    question = relationship("Question", back_populates="game_answers")