using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Transactions;
using bnhtrade.Core.Data;

namespace bnhtrade.Core.Logic.AmazonFBAInbound
{
    public class UpdateDatabaseShipmentInfo
    {
        private string sqlConnectionString;
        private readonly string logDateTimeId = "FbaInboundShipmentNewCheck";
        public int TotalUpdated { get; private set; } = 0;
        public UpdateDatabaseShipmentInfo(string sqlConnectionString)
        {
            this.sqlConnectionString = sqlConnectionString;
        }
        public void GetNew()
        {
            TotalUpdated = 0;

            // get time frame to check
            DateTime dateTimeBefore = new Data.AmazonMWS.CurrentDateTime().GetUtc();
            DateTime dateTimeAfter = new Data.Database.Log.DateTimeLog(sqlConnectionString).GetDateTimeUtc(logDateTimeId);

            //var objGetUtc = new Data.AmazonMWS.CurrentDateTime();
            //DateTime dateTimeBefore = objGetUtc.GetUtc();

            //var objDateTimeCheck = new Data.Database.Log.DateTimeLog(sqlConnectionString);
            //DateTime dateTimeAfter = objDateTimeCheck.GetDateTimeUtc(logDateTimeId);

            // 
            var shipmentRequest = new Data.AmazonMWS.FBAInbound.ListInboundShipments();
            shipmentRequest.LastUpdatedAfter = dateTimeAfter.AddDays(-14);
            shipmentRequest.LastUpdatedBefore = dateTimeBefore;

            List<Model.AmazonFba.ShipmentInfo> shipmentInfoList = shipmentRequest.GetShipmentInfo();

            // build list of shipments returned from mws
            var dicShipExistsInDb = new Dictionary<string, bool>();
            foreach (var item in shipmentInfoList)
            {
                dicShipExistsInDb.Add(item.FbaShipmentId, false);
            }

            // build list of shipmentId that do not exist in database
            int complete = 0;
            using (TransactionScope scope = new TransactionScope())
            {
                List<Model.AmazonFba.ShipmentInfo> newShipmentInfoList = null;
                if (dicShipExistsInDb.Any())
                {
                    var newShipmentId = new List<string>();

                    // query db for shipment header info
                    var resultHeader = new Data.Database.AmazonShipment.ReadShipmentInfo(sqlConnectionString)
                        .HeaderByFbaShipmentId(dicShipExistsInDb.Keys.ToList());

                    // compare db and mws result
                    foreach (var item in resultHeader)
                    {
                        dicShipExistsInDb[item.FbaShipmentId] = true;
                    }
                    foreach (var item in dicShipExistsInDb)
                    {
                        if (item.Value == false)
                        {
                            newShipmentId.Add(item.Key);
                        }
                    }

                    // query mws for new shipment info
                    if (newShipmentId.Any())
                    {
                        shipmentRequest.ShipmentIdList = newShipmentId;
                        newShipmentInfoList = shipmentRequest.GetShipmentInfo();

                        foreach (var item in newShipmentInfoList)
                        {
                            var shipmentItemInfoRequest = new Data.AmazonMWS.FBAInbound.ListInboundShipmentItems();
                            item.ShipmentItemInfoList = shipmentItemInfoRequest.GetByAmazonShipmentId(item.FbaShipmentId);
                        }
                    }

                    // write to db
                    if (newShipmentInfoList != null)
                    {
                        foreach (var item in newShipmentInfoList)
                        {
                            // add the update date
                            item.LastUpdated = dateTimeBefore;

                            // write to db
                            var dbWrite = new Data.Database.AmazonShipment.SetShipmentInfo(sqlConnectionString);
                            dbWrite.Excecute(item);
                            complete = complete + 1;
                        }
                    }
                }

                // update datetime log
                new Data.Database.Log.DateTimeLog(sqlConnectionString).SetDateTimeUtc(logDateTimeId, dateTimeBefore);
                //objDateTimeCheck.SetDateTimeUtc(logDateTimeId, dateTimeBefore);

                scope.Complete();
            }
            TotalUpdated = complete;
        }
    }
}