from sqlalchemy import create_engine, Column, Integer, String, Text, ForeignKey, Boolean
from sqlalchemy.sql.sqltypes import DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy.sql.functions import func
from sqlalchemy.sql.sqltypes import DateTime
import os
import secrets
from passlib.context import CryptContext

# Initialize the database
DATABASE_URL = os.getenv("DATABASE_URL")

if not DATABASE_URL:
    raise ValueError("DATABASE_URL environment variable is not set")

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


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(64), unique=True, nullable=False, index=True)
    password_hash = Column(String(128), nullable=False)
    created_at = Column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


class Script(Base):
    __tablename__ = "scripts"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, nullable=False)
    script_content = Column(Text, nullable=True)
    enabled = Column(Boolean, default=False)
    created_at = Column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    user_id = Column(
        Integer, ForeignKey("users.id", name="fk_script_user_id"), nullable=False
    )


class Log(Base):
    __tablename__ = "logs"

    id = Column(Integer, primary_key=True, index=True)
    message = Column(String, nullable=False)
    error_code = Column(Integer, nullable=False, default=0)
    error_message = Column(String, nullable=True)
    created_at = Column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    script_id = Column(
        Integer, ForeignKey("scripts.id", name="fk_log_script_id"), nullable=False
    )


class Settings(Base):
    __tablename__ = "user_settings"

    id = Column(Integer, primary_key=True, index=True)
    requirements = Column(String, nullable=False)
    environment = Column(String, nullable=False)
    ntfy_url = Column(String, nullable=True)
    user_id = Column(
        Integer, ForeignKey("users.id", name="fk_user_settings_user_id"), nullable=False
    )


class Subscription(Base):
    __tablename__ = "subscriptions"

    id = Column(Integer, primary_key=True, index=True)
    topic = Column(String, nullable=False, unique=True)
    last_message_id = Column(String, nullable=True)
    created_at = Column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    user_id = Column(
        Integer, ForeignKey("users.id", name="fk_subscription_user_id"), nullable=False
    )


class Notification(Base):
    __tablename__ = "notifications"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String(255), nullable=False)
    message = Column(Text, nullable=False)
    priority = Column(Integer, nullable=False, default=3)
    viewed = Column(Boolean, default=False)
    sent = Column(Boolean, default=False)

    subscription_id = Column(
        Integer,
        ForeignKey("subscriptions.id", name="fk_notification_subscription_id"),
        nullable=False,
    )
    created_at = Column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


# Create the database tables
Base.metadata.create_all(bind=engine)


# Ensure a default admin user exists
def ensure_default_setting():
    db = SessionLocal()
    admin_user = db.query(User).filter(User.username == "admin").first()
    if not admin_user:
        pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
        random_password = secrets.token_urlsafe(12)
        password_hash = pwd_context.hash(random_password)
        admin_user = User(username="admin", password_hash=password_hash)
        db.add(admin_user)
        db.commit()
        print(
            f"Default admin user created. Username: admin, Password: {random_password}"
        )
        # Refresh to get admin_user.id
        db.refresh(admin_user)
    # Set all rows with null user_id in Script and Subscription to admin user id
    db.query(Script).filter(Script.user_id is None).update({"user_id": admin_user.id})
    db.query(Subscription).filter(Subscription.user_id is None).update(
        {"user_id": admin_user.id}
    )
    db.commit()

    default_setting = (
        db.query(Settings).filter(Settings.user_id == admin_user.id).first()
    )
    if not default_setting:
        new_setting = Settings(
            requirements="",
            environment="",
            user_id=admin_user.id,
            ntfy_url="https://ntfy.abzk.fr",
        )
        db.add(new_setting)
        db.commit()
    db.close()