using IceImportDAL.DTO.IceImportPipeline;

namespace IceImportBLL.FieldResolvers;

// ValueType = 1 (Fixed). Legacy overloads IceMapDetailsSourceFieldName to also hold the literal
// fixed value when ValueType is Fixed rather than Source.
public class FixedValueResolver : IIceFieldValueResolver
{
    public int ValueType => 1;

    public Task<FieldResolutionResult> ResolveAsync(FieldResolutionContext ctx, CancellationToken ct)
    {
        var raw = ctx.DetailConfig.IceMapDetailsSourceFieldName;

        if (!IceImportTypeCoercion.TryCoerce(raw, ctx.DetailConfig.DestinationMemberDataType, out var value))
        {
            var warning = new IceImportFieldErrorDTO
            {
                RowNumber = ctx.RowNumber,
                EntityCode = ctx.DetailConfig.EntityCode ?? string.Empty,
                FieldName = ctx.DetailConfig.DestinationMemberMemberName ?? string.Empty,
                Message = $"Fixed value '{raw}' could not be converted to the destination field's declared type.",
                Severity = IceImportSeverity.Warning
            };
            return Task.FromResult(FieldResolutionResult.WithWarning(null, warning));
        }

        return Task.FromResult(FieldResolutionResult.Ok(value));
    }
}