namespace Electricity.Api.Models;

public record Day(uint DateTime, double TotalPowerUse, double TotalPowerReturn, double TotalGasUse)
{
    public static Day Empty(DateOnly date)
    {
        return new Day(
            ConvertToEpoch(date.ToDateTime(new TimeOnly(0, 0), DateTimeKind.Utc)),
            0, 0, 0);
    }

    public static Day FromEntity(Entities.ElectricityLog entity)
    {
        return new Day(
            DateTime: ConvertToEpoch(ParseEntityDateTime(entity.Date, entity.TimeUtc)),
            TotalPowerUse: entity.TotalPowerConsumptionDay + entity.TotalPowerConsumptionNight,
            TotalPowerReturn: entity.TotalPowerReturnDay + entity.TotalPowerReturnNight,
            TotalGasUse: entity.GasConsumptionInCubicMeters
        );
    }

    private static DateTime ParseEntityDateTime(string date, string timeUtc)
    {
        return System.DateTime
            .Parse(
                $"{date}T{timeUtc}Z",
                null,
                System.Globalization.DateTimeStyles.AssumeUniversal)
            .ToUniversalTime();
    }

    private static uint ConvertToEpoch(DateTime dateTime)
    {
        return (uint)Math.Round((dateTime - System.DateTime.UnixEpoch).TotalSeconds);
    }
};