"""
Migration script to add notification tables to the database.
"""
from sqlalchemy import create_engine, text
from database import DATABASE_URL
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


def migrate():
    """Add notification tables to the database."""
    engine = create_engine(DATABASE_URL)
    
    with engine.connect() as conn:
        try:
            # Create notifications table
            logger.info("Creating notifications table...")
            conn.execute(text("""
                CREATE TABLE IF NOT EXISTS notifications (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    user_id INTEGER NOT NULL,
                    type VARCHAR(50) NOT NULL,
                    priority VARCHAR(20) DEFAULT 'normal',
                    title VARCHAR(255) NOT NULL,
                    message TEXT NOT NULL,
                    read BOOLEAN DEFAULT 0,
                    project_id INTEGER,
                    task_id INTEGER,
                    submission_id INTEGER,
                    email_sent BOOLEAN DEFAULT 0,
                    email_sent_at DATETIME,
                    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                    read_at DATETIME,
                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
                    FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE,
                    FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
                    FOREIGN KEY (submission_id) REFERENCES submissions(id) ON DELETE CASCADE
                )
            """))
            
            # Create indexes for notifications
            logger.info("Creating indexes for notifications table...")
            conn.execute(text("""
                CREATE INDEX IF NOT EXISTS idx_notifications_user_id 
                ON notifications(user_id)
            """))
            
            conn.execute(text("""
                CREATE INDEX IF NOT EXISTS idx_notifications_read 
                ON notifications(read)
            """))
            
            # Create user_notification_preferences table
            logger.info("Creating user_notification_preferences table...")
            conn.execute(text("""
                CREATE TABLE IF NOT EXISTS user_notification_preferences (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    user_id INTEGER NOT NULL UNIQUE,
                    email_enabled BOOLEAN DEFAULT 1,
                    email_task_assigned BOOLEAN DEFAULT 1,
                    email_task_status_changed BOOLEAN DEFAULT 1,
                    email_submission_reviewed BOOLEAN DEFAULT 1,
                    email_work_submitted BOOLEAN DEFAULT 1,
                    email_deadline_approaching BOOLEAN DEFAULT 1,
                    email_project_update BOOLEAN DEFAULT 1,
                    email_comment_added BOOLEAN DEFAULT 1,
                    inapp_enabled BOOLEAN DEFAULT 1,
                    inapp_task_assigned BOOLEAN DEFAULT 1,
                    inapp_task_status_changed BOOLEAN DEFAULT 1,
                    inapp_submission_reviewed BOOLEAN DEFAULT 1,
                    inapp_work_submitted BOOLEAN DEFAULT 1,
                    inapp_deadline_approaching BOOLEAN DEFAULT 1,
                    inapp_project_update BOOLEAN DEFAULT 1,
                    inapp_comment_added BOOLEAN DEFAULT 1,
                    email_digest_enabled BOOLEAN DEFAULT 0,
                    email_digest_frequency VARCHAR(50) DEFAULT 'daily',
                    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
                )
            """))
            
            conn.commit()
            logger.info("✅ Notification tables created successfully!")
            
        except Exception as e:
            logger.error(f"❌ Migration failed: {str(e)}")
            conn.rollback()
            raise


if __name__ == "__main__":
    migrate()