using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using QMSBLL.Matrix;
using static GB5Shared.GB5Constant.Constant;

namespace QMSSL.EndPoints.Matrix
{
    public class GetMatrixAllocationPreview
        : BaseEndpoint<GetMatrixAllocationPreview.Params, ResponseStandardDTO<object>>
    {
        private readonly IMatrixBLL _bll;
        public GetMatrixAllocationPreview(IMatrixBLL bll) => _bll = bll;

        public override void Configure()
        {
            Get("/Matrix/GetMatrixAllocationPreview");
            AllowAnonymous();
            Description(x => x
                .WithTags("Matrix")
                .WithSummary("Get Matrix Allocation Preview")
                .WithDescription("Matrix-independent dashboard: customer/SO/sets-ordered-generated-remaining summary plus the Product Composition & Next Serial Numbers table. Caller passes AllotedAllocationId only. Sourced entirely from TPENDINGALLOCATION/TALLOCATION/MALLOCATION/MPARTY/MITEM (summary) and MBOM/TLOT/TLOTDETAIL (composition) — never touches TMATRIX, TMATRIXINPUT, or TMATRIXOUTPUT."));
        }

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

        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.GetMatrixAllocationPreviewAsync(req.AllotedAllocationId, login, ct);

                if (result is null)
                    return await GB5Shared.ResponseStandard.Response
                        .CreateExceptionError<string>(
                            new InvalidOperationException("No matrix found for this allocation."),
                            CacheKeyLevel.NOT_REQUIRED, login,
                            "No matrix found for this allocation.", 404);

                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);
            }
        }
    }
}