import mariadb
from flask import current_app

def get_db_connection():
    """Get database connection using external server configuration"""
    settings_file = current_app.instance_path + '/external_server.conf'
    settings = {}
    with open(settings_file, 'r') as f:
        for line in f:
            key, value = line.strip().split('=', 1)
            settings[key] = value
    return mariadb.connect(
        user=settings['username'],
        password=settings['password'],
        host=settings['server_domain'],
        port=int(settings['port']),
        database=settings['database_name']
    )

def get_unprinted_orders_data(limit=100):
    """
    Retrieve unprinted orders from the database for display
    Returns list of order dictionaries where printed_labels != 1
    """
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # Check if printed_labels column exists
        cursor.execute("SHOW COLUMNS FROM order_for_labels LIKE 'printed_labels'")
        column_exists = cursor.fetchone()
        
        if column_exists:
            # Use printed_labels column
            cursor.execute("""
                SELECT id, comanda_productie, cod_articol, descr_com_prod, cantitate,
                       com_achiz_client, nr_linie_com_client, customer_name,
                       customer_article_number, open_for_order, line_number,
                       created_at, updated_at, printed_labels, data_livrare, dimensiune
                FROM order_for_labels 
                WHERE printed_labels != 1
                ORDER BY created_at DESC 
                LIMIT %s
            """, (limit,))
        else:
            # Fallback: get all orders if no printed_labels column
            cursor.execute("""
                SELECT id, comanda_productie, cod_articol, descr_com_prod, cantitate,
                       com_achiz_client, nr_linie_com_client, customer_name,
                       customer_article_number, open_for_order, line_number,
                       created_at, updated_at
                FROM order_for_labels 
                ORDER BY created_at DESC 
                LIMIT %s
            """, (limit,))
        
        orders = []
        for row in cursor.fetchall():
            if column_exists:
                orders.append({
                    'id': row[0],
                    'comanda_productie': row[1],
                    'cod_articol': row[2],
                    'descr_com_prod': row[3],
                    'cantitate': row[4],
                    'com_achiz_client': row[5],
                    'nr_linie_com_client': row[6],
                    'customer_name': row[7],
                    'customer_article_number': row[8],
                    'open_for_order': row[9],
                    'line_number': row[10],
                    'created_at': row[11],
                    'updated_at': row[12],
                    'printed_labels': row[13],
                    'data_livrare': row[14] or '-',
                    'dimensiune': row[15] or '-'
                })
            else:
                orders.append({
                    'id': row[0],
                    'comanda_productie': row[1],
                    'cod_articol': row[2],
                    'descr_com_prod': row[3],
                    'cantitate': row[4],
                    'com_achiz_client': row[5],
                    'nr_linie_com_client': row[6],
                    'customer_name': row[7],
                    'customer_article_number': row[8],
                    'open_for_order': row[9],
                    'line_number': row[10],
                    'created_at': row[11],
                    'updated_at': row[12],
                    # Add default values for missing columns
                    'data_livrare': '-',
                    'dimensiune': '-',
                    'printed_labels': 0
                })
            
        conn.close()
        return orders
        
    except Exception as e:
        print(f"Error retrieving unprinted orders: {e}")
        return []