using Budget.Core.Models;

namespace Budget.Core.Services;

public static class FrequencyCalculator
{
    public static decimal ToMonthly(decimal amount, Frequency frequency) => frequency switch
    {
        Frequency.Biennial      => amount / 24m,
        Frequency.Annually      => amount / 12m,
        Frequency.Biannually    => amount * 2m / 12m,
        Frequency.Quarterly     => amount * 4m / 12m,
        Frequency.EveryTwoMonths => amount * 6m / 12m,
        Frequency.Monthly       => amount,
        Frequency.SemiMonthly   => amount * 2m,
        Frequency.Biweekly      => amount * 26m / 12m,
        Frequency.Weekly        => amount * 52m / 12m,
        _ => 0m,
    };

    public static decimal ToAnnually(decimal amount, Frequency frequency) =>
        ToMonthly(amount, frequency) * 12m;
}