using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Data.SqlClient;
using Microsoft.Extensions.Configuration;
using PartSource.Automation.Models.Configuration;
using PartSource.Automation.Models.Ftp;
using PartSource.Automation.Services;
using Ratermania.Automation.Interfaces;

namespace PartSource.Automation.Jobs.POC
{
    public class PartialInventoryUpdate : IAutomationJob
    {
        private readonly FtpService _ftpService;

        public PartialInventoryUpdate(IConfiguration configuration)
        {
            FtpConfiguration ftpConfiguration = configuration.GetSection("FtpServers:AzureConfiguration").Get<FtpConfiguration>();
            _ftpService = new FtpService(ftpConfiguration);
        }

        public async Task Run(CancellationToken token, params string[] arguments)
        {
            FtpFileInfo lastUploadedFile = _ftpService.ListFilesExtended("")
                .Where(f => f.FileType == FtpFileType.File && f.Filename.IndexOf("Availability") > -1)
                .OrderByDescending(f => f.Modified)
                .First();

            string file = _ftpService.Download(lastUploadedFile.Filename, Path.GetTempPath());

			DataTable dataTable = GetDataTable(file);

			using SqlConnection connection = new SqlConnection("Server=tcp:ps-automation-stage.eastus2.cloudapp.azure.com,1433;Initial Catalog=ps-whi-stage;Persist Security Info=False;User ID=stageuser;Password=]FXepK^cFYS|[H<;MultipleActiveResultSets=True;Encrypt=True;TrustServerCertificate=True;Connection Timeout=30;");
			connection.Open();

			using SqlBulkCopy bulk = new SqlBulkCopy(connection)
			{
				DestinationTableName = $"PartAvailability",
				BulkCopyTimeout = 14400
			};

			bulk.WriteToServer(dataTable);

			return;
        }

		private DataTable GetDataTable(string filename)
		{
			using DataTable dataTable = new DataTable();
			dataTable.Columns.Add("Store", typeof(int));
			dataTable.Columns.Add("SKU", typeof(int));
			dataTable.Columns.Add("QTY", typeof(int));

			using StreamReader reader = new StreamReader(filename);
			string line = reader.ReadLine(); // Burn the header row

			while (reader.Peek() > 0)
			{
				line = reader.ReadLine();

				string[] columns = line.Split("|");
				for (int i = 0; i < columns.Length; i++)
				{
					columns[i] = columns[i].Replace("\"", string.Empty);
				}

				if (int.TryParse(columns[0], out int store)
					&& int.TryParse(columns[1], out int sku)
					&& int.TryParse(columns[2], out int quantity))
				{
					dataTable.Rows.Add(new object[] { store, sku, quantity });
				}
			}

			return dataTable;
		}
	}
}