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 GenerateMatrixLots
    : BaseEndpoint<GenerateMatrixLots.Params, ResponseStandardDTO<object>>
{
    private readonly IMatrixBLL _bll;
    public GenerateMatrixLots(IMatrixBLL bll) => _bll = bll;

    public override void Configure()
    {
        Get("/Matrix/GenerateMatrixLots");
        AllowAnonymous();
        Description(x => x
            .WithTags("Matrix")
            .WithSummary("Generate Matrix Lots")
            .WithDescription("Matrix-independent read-only preview: computes the Set View and FG View " +
                "serial breakdown that WOULD be generated for this allocation line, without writing " +
                "anything to the database. Caller passes AllotedAllocationId (e.g. from " +
                "GetSelectListAllocationWithItem) instead of MatrixId. SetsToGenerate controls how many " +
                "sets to preview (0 = all remaining ungenerated sets). Does not touch TMATRIX, " +
                "TMATRIXINPUT, or TMATRIXOUTPUT."));
    }

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

    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.GenerateMatrixLotsAsync(
                req.AllotedAllocationId, req.SetsToGenerate, login, ct);

            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);
        }
    }
}