using System;

using NodaTime;

using Npgsql.Internal;

using Npgsql.NodaTime.Properties;

namespace Npgsql.NodaTime.Internal;

sealed class LocalDateConverter(bool dateTimeInfinityConversions) : PgBufferedConverter<LocalDate>

{

public override bool CanConvert(DataFormat format, out BufferRequirements bufferRequirements)

{

bufferRequirements = BufferRequirements.CreateFixedSize(sizeof(int));

return format is DataFormat.Binary;

}

protected override LocalDate ReadCore(PgReader reader)

=> reader.ReadInt32() switch

{

int.MaxValue => dateTimeInfinityConversions

? LocalDate.MaxIsoValue

: throw new InvalidCastException(NpgsqlNodaTimeStrings.CannotReadInfinityValue),

int.MinValue => dateTimeInfinityConversions

? LocalDate.MinIsoValue

: throw new InvalidCastException(NpgsqlNodaTimeStrings.CannotReadInfinityValue),

var value => new LocalDate().PlusDays(value + 730119)

};

protected override void WriteCore(PgWriter writer, LocalDate value)

{

if (dateTimeInfinityConversions)

{

if (value == LocalDate.MaxIsoValue)

{

writer.WriteInt32(int.MaxValue);

return;

}

if (value == LocalDate.MinIsoValue)

{

writer.WriteInt32(int.MinValue);

return;

}

}

var totalDaysSinceEra = Period.Between(default, value, PeriodUnits.Days).Days;

writer.WriteInt32(totalDaysSinceEra - 730119);

}

}