using AsbCloudApp.Data;
using AsbCloudApp.Requests;
using AsbCloudApp.Services;
using AsbCloudDb.Model;
using AsbCloudInfrastructure.Services;
using Mapster;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Background
{
    /// <summary>
    /// Класс для создания отчета
    /// </summary>
    internal class WorkToCreateReport : Work
    {
        private int idWell;
        private DateTime begin;
        private DateTime end;
        private int stepSeconds;
        private int format;
        private int idUser;
        private Action<object, string> progressHandler;

        public WorkToCreateReport(int idWell, int idUser, ReportParametersRequest request, Action<object, string> progressHandler) : base("")
        {
            this.idWell = idWell;
            this.idUser = idUser;

            this.begin = request.Begin;
            this.end = request.End;
            this.stepSeconds = request.StepSeconds;
            this.format = request.Format;

            this.progressHandler = progressHandler;

            Id = $"create report by wellid:{idWell} for userid:{idUser} requested at {DateTime.Now}";
        }


        protected override async Task Action(string id, IServiceProvider services, Action<string, double?> onProgress, CancellationToken token)
        {
            var wellService = services.GetRequiredService<IWellService>();
            using var context = services.GetRequiredService<IAsbCloudDbContext>();
            var fileService = services.GetRequiredService<FileService>();

            var timezoneOffset = wellService.GetTimezone(idWell).Hours;
            var beginRemote = begin.ToTimeZoneOffsetHours(timezoneOffset);
            var endRemote = end.ToTimeZoneOffsetHours(timezoneOffset);
            var beginUtc = begin.ToUtcDateTimeOffset(timezoneOffset);
            var endUtc = end.ToUtcDateTimeOffset(timezoneOffset);

            var tempDir = Path.Combine(Path.GetTempPath(), "report");

            var generator = ReportService.GetReportGenerator(idWell, beginRemote, endRemote, stepSeconds, format, context);
            var reportFileName = Path.Combine(tempDir, generator.GetReportDefaultFileName());
            var totalPages = generator.GetPagesCount();

            generator.OnProgress += (s, e) =>
            {
                var arg = e.Adapt<ReportProgressDto>();
                onProgress(arg.Operation ?? string.Empty, arg.Progress);
                progressHandler.Invoke(arg, id);
            };
            generator.Make(reportFileName);

            var ReportCategoryId = context.FileCategories
                .AsNoTracking()
                .First(c => c.Name.Equals("Рапорт"))
                .Id;

            var fileInfo = (await fileService.MoveAsync(idWell, idUser, ReportCategoryId, reportFileName, reportFileName, token))!;

            progressHandler.Invoke(new
            {
                Operation = "done",
                Progress = 100f,
                TotalPages = totalPages,
                CurrentPage = totalPages,
                file = fileInfo,
            }, id);

            var newReportProperties = new ReportProperty
            {
                IdWell = idWell,
                IdFile = fileInfo.Id,
                Begin = beginUtc,
                End = endUtc,
                Step = stepSeconds,
                Format = format
            };
            context.ReportProperties.Add(newReportProperties);
            context.SaveChanges();
        }
    }
}