import psycopg2
import sys

def check_db():
    try:
        conn = psycopg2.connect("postgres://nxcaldav@localhost:5432/nxcaldav")
        cur = conn.cursor()
        
        print("--- Users ---")
        cur.execute("SELECT id, name FROM users")
        users = cur.fetchall()
        for u in users:
            print(u)
            
        print("\n--- Calendars ---")
        cur.execute("SELECT id, path, owner_id FROM calendars")
        cals = cur.fetchall()
        for c in cals:
            print(c)
            
        print("\n--- Calendar Access (Diane) ---")
        cur.execute("""
            SELECT c.path, ca.mode 
            FROM calendar_access ca 
            JOIN calendars c ON ca.calendar_id = c.id 
            JOIN users u ON ca.user_id = u.id 
            WHERE u.name = 'diane'
        """)
        access = cur.fetchall()
        for a in access:
            print(a)
            
        cur.close()
        conn.close()
    except Exception as e:
        print(f"Error: {e}")

if __name__ == "__main__":
    check_db()