"""
Presentation of account fact sales data

Presents fact_sales model data with specific response format.
"""
from ows_accounting import features


def revenues(results):
    """Get proper format of list of account revenues.

    Args:
        results (list): revenue data from model fact_sales.

    Returns:
        list: list of account revenue dictionaries.
    """

    return [revenue(result) for result in results]


def revenue(result):
    """Get proper format of account revenue.

    Args:
        result (dict): single account revenue data.

    Returns:
        dict: account revenue dictionary.
    """
    data = {
        'period_id': int(result[0]),
        'revenue': float(result[1]),
        'num_transactions': int(result[2])
    }
    if features.is_vendor_gross_net_enabled():
        try:
            data['gross_revenue'] = float(result[3])
        except IndexError:
            data['gross_revenue'] = 0
    return data