namespace LaaProductionWeb.API.Areas.Shipment.Models
{
    using LaaProductionWeb.API.Areas.Shipment.Models.Interfaces;
    using LaaProductionWeb.API.Models;
    using LaaProductionWeb.API.Models.SMTP;
    using LaaProductionWeb.Data.Interfaces;

    using System.Collections.Generic;
    using System.Threading.Tasks;

    public class ScanModel : IScanModel
    {
        private readonly ISqlClient sqlClient;
        private readonly SMTPClient smtpClient;

        public ScanModel(ISqlClient sqlClient, SMTPClient smtpClient)
        {
            this.sqlClient = sqlClient;
            this.smtpClient = smtpClient;
        }

        public async Task<ModelResult> SerialScannedAsync(string serialNo)
        {
            const string TEST_STATE = "25";

            var watermeterTestPassed = this.sqlClient
                .FirstOrDefault(
                    query: $@"
                        SELECT [PS].[AuftragNr]
	                         , CASE WHEN MAX([APS].[StatusFertigung]) > '{TEST_STATE}'
			                        THEN CAST(1 AS BIT)
			                        ELSE CAST(0 AS BIT) END
                          FROM [PalettenScan]									AS [PS]
                          LEFT JOIN [AuftragPositionSerienNr]					AS [APS]
                            ON [APS].[AuftragNr]								 = [PS].[AuftragNr]
                           AND [APS].[PositionNr]								 = [PS].[PositionNr]
                           AND (REPLACE([APS].[KundeneigeneSerienNr], ' ', '')	 = [PS].[SerienNr] 
                            OR CAST([APS].[SerienNr] AS VARCHAR)				 = [PS].[SerienNr])
                         WHERE [PS].[SerienNr]									 = @{nameof(serialNo)}
                         GROUP BY [PS].[AuftragNr]",
                    parameters: parameters => parameters.Add(nameof(serialNo), serialNo),
                    reader: reader => new KeyValuePair<string, bool>(
                        key: reader.GetString(),
                        value: reader.GetValue<bool>()));

            if (watermeterTestPassed.Value)
            {
                var orderNo = watermeterTestPassed.Key;
                var unpackedWatermeterCount = this.sqlClient
                    .FirstOrDefault(
                        query: $@"
                            SELECT COUNT(1) 
                              FROM [AuftragPositionSerienNr]						AS [APS]
                              LEFT JOIN [PalettenScan]								AS [PS]
                                ON [PS].[AuftragNr]									 = [APS].[AuftragNr]
                               AND [PS].[PositionNr]								 = [APS].[PositionNr]
                               AND (REPLACE([APS].[KundeneigeneSerienNr], ' ', '')	 = [PS].[SerienNr] 
                                OR CAST([APS].[SerienNr] AS VARCHAR)				 = [PS].[SerienNr])
                             WHERE [PS].[AuftragNr]									 = @{nameof(orderNo)}
                               AND [APS].[StatusFertigung]							 > '{TEST_STATE}'
                               AND [PS].[ID]										IS NULL",
                        parameters: parameters => parameters.Add(nameof(orderNo), orderNo),
                        reader: reader => reader.GetValue<int>());

                if (unpackedWatermeterCount == 0)
                {
                    return await this.smtpClient.SendAsync(
                        subject: "Subject", 
                        body: "Html or text body", 
                        from: "laa_production@xylem.com", 
                        to: new[] { "Roland.Drabesch@Xylem.com", "Stoyan.Zlatev@Xylem.com" });
                }
            }

            return false;
        }
    }
}