backend/database.py

from sqlalchemy import create_engine, Column, Integer, String, Boolean, ForeignKey
from sqlalchemy.orm import declarative_base, sessionmaker

DATABASE_URL = "sqlite:///./focusflow.db"

engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

class Source(Base):
    __tablename__ = "sources"

    id = Column(Integer, primary_key=True, index=True)
    student_id = Column(String, index=True, default="anonymous")
    filename = Column(String, index=True)
    type = Column(String)  # online/offline
    file_path = Column(String)
    is_active = Column(Boolean, default=True)

class Schedule(Base):
    __tablename__ = "schedule"

    id = Column(Integer, primary_key=True, index=True)
    student_id = Column(String, index=True, default="anonymous")
    date = Column(String, index=True)  # YYYY-MM-DD
    topic_name = Column(String)
    is_completed = Column(Boolean, default=False)
    is_locked = Column(Boolean, default=True)

class Mastery(Base):
    __tablename__ = "mastery"

    id = Column(Integer, primary_key=True, index=True)
    student_id = Column(String, index=True, default="anonymous")
    topic_name = Column(String, index=True)
    quiz_score = Column(Integer, default=0)
    flashcard_status = Column(String, default="Not Started")

# Create tables
def init_db():
    Base.metadata.create_all(bind=engine)

if __name__ == "__main__":
    init_db()