using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Volo.Abp;
using Volo.Abp.BackgroundWorkers;
using Volo.Abp.Data;
using Volo.Abp.Domain.Entities;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.MultiTenancy;
using Volo.Abp.TenantManagement;
using Volo.Abp.Threading;
using Volo.Abp.Uow;
using Win_in.Sfs.Scp.v1.Domain;
using Win_in.Sfs.Scp.v1.Domain.Asns;
using Win_in.Sfs.Scp.WebApi.Asns;

namespace Win_in.Sfs.Scp.WebApi
{
    public class AsnBackgroundWorker : AsyncPeriodicBackgroundWorkerBase
    {
        private readonly IOptions<AsnOptions> _options;

        public AsnBackgroundWorker(
            AbpAsyncTimer timer,
            IOptions<AsnOptions> options,
            IServiceScopeFactory serviceScopeFactory
        ) : base(timer, serviceScopeFactory)
        {
            _options = options;
            Timer.Period = options.Value.PeriodSeconds * 1000; //default 5 minutes
        }

        [UnitOfWork]
        protected override async Task DoWorkAsync(PeriodicBackgroundWorkerContext workerContext)
        {
            Logger.LogInformation("Get ASN from SCP: Start");
            if (!_options.Value.Active)
            {
                Logger.LogInformation("Get ASN from SCP: Switch is closed!");
                return;
            }

            //Resolve dependencies
            var scpAsnManager = workerContext.ServiceProvider.GetRequiredService<IScpAsnManager>();
            var x12AsnRepository = workerContext.ServiceProvider.GetRequiredService<IX12AsnRepository>();
            var tenantStore = workerContext.ServiceProvider.GetRequiredService<ITenantStore>();
            var currentTenant = workerContext.ServiceProvider.GetRequiredService<ICurrentTenant>();
            var dataFilter = workerContext.ServiceProvider.GetRequiredService<IDataFilter>();

            //Do the work
            var asnX12List = new List<X12Asn>();

            foreach (var site in _options.Value.Sites)
            {
                var siteCode = site.Code;
                var siteMinUid = site.MinUid;
                try
                {
                    var tenant = await tenantStore.FindAsync(siteCode);

                    using (currentTenant.Change(tenant.Id, tenant.Name))
                    {
                        using (dataFilter.Disable<IMultiTenant>())
                        {
                            long lastUid = 0;

                            var x12 = await x12AsnRepository
                                .Where(p => p.Site == siteCode)
                                .OrderByDescending(p => p.UID)
                                .FirstOrDefaultAsync();
                            lastUid = x12?.UID ?? 0;

                            if (lastUid < siteMinUid)
                            {
                                lastUid = siteMinUid;
                            }

                            Logger.LogInformation($"{siteCode}: Last UID is {lastUid}");
                            var scpAsns =
                                await scpAsnManager.GetUnreadAsnsAsync(siteCode, lastUid, _options.Value.BatchSize);

                            Logger.LogInformation($"{siteCode}: {scpAsns.Count} ASNs were Found");

                            foreach (var asn in scpAsns)
                            {
                                var barcodes = await scpAsnManager.GetBarcodesAsync(siteCode, asn.AsnBillNum);
                                var asnFactory = new AsnFactory();
                                var asnX128563060 =
                                    asnFactory.CreateAsnX128563060(_options.Value.Receiver, asn, barcodes);
                                var jsonString = JsonSerializer.Serialize(asnX128563060);
                                var ediString = asnX128563060.ToString();
                                var asnX12 = new X12Asn(asn.Id, asn.Site, asn.AsnBillNum, jsonString, ediString,
                                    asn.ShipTime ?? DateTime.Today);
                                asnX12List.Add(asnX12);
                                Logger.LogInformation($"{siteCode}:{asn.Id} {asn.AsnBillNum} was loaded");
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    Logger.LogException(ex);
                }


            }

            foreach (var x12Asn in asnX12List)
            {
                var exist = await x12AsnRepository.FirstOrDefaultAsync(
                    p => p.UID == x12Asn.UID && p.Site == x12Asn.Site);
                if (exist == null)
                {
                    await x12AsnRepository.InsertAsync(x12Asn);
                }
                else
                {
                    exist.JsonString = x12Asn.JsonString;
                    exist.Reset();
                    await x12AsnRepository.UpdateAsync(exist);
                }
            }

            await x12AsnRepository.InsertManyAsync(asnX12List, true);

            Logger.LogInformation("Get ASN from SCP: Complete");
        }

    }
}