using AnalyticsBLL.BIFieldMapping;
using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace AnalyticsSL.EndPoints.BI
{
    // Phase 2: samples one live row from an ApiService-kind catalog's report and returns a
    // draft field-mapping list for the admin to review/edit before saving (SaveBIFieldMapping).
    // Never persists anything itself. See BIFieldMappingBLL.SuggestMappings.
    public class SuggestBIFieldMappings
        : BaseEndpoint<SuggestBIFieldMappings.Params, ResponseStandardDTO<object>>
    {
        private readonly IBIFieldMappingBLL _bll;

        public SuggestBIFieldMappings(IBIFieldMappingBLL bll) => _bll = bll;

        public override void Configure()
        {
            Get("/BI/SuggestBIFieldMappings");
            AllowAnonymous();
        }

        public record Params(
            [property: QueryParam] int BICatalogId,
            [property: FromHeader] string Login
        );

        protected override string? GetCacheKey(Params req, LoginDTO login) => null;

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            Params req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var result = await _bll.SuggestMappings(req.BICatalogId, login, ct).ConfigureAwait(false);
                return await GB5Shared.ResponseStandard.Response
                    .CreateSuccessResponse(result, CacheKeyLevel.NOT_REQUIRED, login);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response
                    .CreateExceptionError<string>(ex, CacheKeyLevel.NOT_REQUIRED, login, ex.Message, 500);
            }
        }
    }
}