import os
from datetime import datetime

from dotenv import load_dotenv
from sqlalchemy import create_engine, Column, Integer, String, Float, DateTime, Text

load_dotenv()
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

Base = declarative_base()


class Prediction(Base):
    __tablename__ = "predictions"

    id = Column(Integer, primary_key=True, autoincrement=True)
    image_data = Column(Text, nullable=True)
    image_path = Column(String, nullable=False)
    disease = Column(String, nullable=False)
    confidence = Column(Float, nullable=False)
    cnn_disease = Column(String, nullable=True)
    cnn_confidence = Column(Float, nullable=True)
    source = Column(String, nullable=True)
    autoderm_predictions = Column(Text, nullable=True)
    severity = Column(String, nullable=True)
    severity_confidence = Column(String, nullable=True)
    reasoning = Column(String, nullable=True)
    timestamp = Column(DateTime, default=datetime.utcnow)


DATABASE_URL = os.getenv("DATABASE_URL")
if not DATABASE_URL:
    raise ValueError("DATABASE_URL environment variable is not set")

engine = create_engine(
    DATABASE_URL,
    connect_args={"sslmode": "require"},
    pool_pre_ping=True,
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


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


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()