using AsbCloudApp.Data;
using AsbCloudApp.Services;
using AsbCloudDb.Model;
using ClosedXML.Excel;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Services.ProcessMap
{
    public class ProcessMapReportService : IProcessMapReportService
    {
        private readonly IAsbCloudDbContext context;
        private readonly IProcessMapRepository processMapRepository;

        public ProcessMapReportService(IAsbCloudDbContext context, IProcessMapRepository processMapRepository)
        {
            this.context = context;
            this.processMapRepository = processMapRepository;
        }

        public async Task<Stream> MakeReportAsync(int idWell, CancellationToken token)
        {
            var dtos = (await processMapRepository.GetByIdWellAsync(idWell, token))
                .GroupBy(x => x.IdWellSectionType);
            var stream = GetExcelTemplateStream();
            using var workbook = new XLWorkbook(stream, XLEventTracking.Disabled);

            FillProcessMapToWorkbook(workbook, dtos);

            MemoryStream memoryStream = new MemoryStream();
            workbook.SaveAs(memoryStream, new SaveOptions { });
            memoryStream.Seek(0, SeekOrigin.Begin);
            return memoryStream;
        }

        private static void FillProcessMapToWorkbook(XLWorkbook workbook, IEnumerable<IGrouping<int, ProcessMapDto>> dto)
        {
            var sheet = workbook.Worksheets.FirstOrDefault();
            if (sheet is null)
                return;


        }

        private Stream GetExcelTemplateStream()
        {
            var stream = System.Reflection.Assembly.GetExecutingAssembly()
                .GetManifestResourceStream("AsbCloudInfrastructure.Services.ProcessMap.ProcessMapReportTemplate.xlsx");
            return stream;
        }
    }
}