using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using GeneralApi.IntegrationUtility.Common;
using log4net;
using Microsoft.Practices.ServiceLocation;
using Taloyhtio.GeneralApi.Common.Extensions;
using Taloyhtio.GeneralApi.IntegrationUtility.TaloyhtioIntegration;
using Condo = Taloyhtio.GeneralApi.Common.DTO.Condo;

namespace Taloyhtio.GeneralApi.IntegrationUtility.Services.Impl
{
    public class FileProcessor<T> : IFileProcessor<T>
        where T : class
    {
        private ILog logger = ServiceLocator.Current.GetInstance<ILog>();
        private IFileParser<T> parser;
        private ISettingsProvider settingsProvider;
        private ISender<T> sender;

        public FileProcessor(IFileParser<T> parser, ISettingsProvider settingsProvider, ISender<T> sender)
        {
            this.parser = parser;
            this.sender = sender;
            this.settingsProvider = settingsProvider;
            this.sender = sender;
        }

        public bool ProcessFile(string filePath)
        {
            try
            {
                return this.processFile(filePath);
            }
            catch (Exception x)
            {
                this.logger.ErrorFormat(string.Format("{0}\n{1}", x.Message, x.StackTrace));
                return false;
            }
        }

        private bool processFile(string filePath)
        {
            if (string.IsNullOrEmpty(filePath))
            {
                this.logger.WarnFormat("File path is null or empty");
                return false;
            }
            var items = this.parser.Parse(filePath);
            if (items.IsNullOrEmpty())
            {
                this.logger.WarnFormat("No items were found in the file '{0}'", filePath);
                return true;
            }
            this.logger.InfoFormat("'{0}' item(s) were found in the file '{1}'", items.Count, filePath);

            var proxy = new TaloyhtioIntegrationClient();
            using (new OperationContextScope(proxy.InnerChannel))
            {
                string loginName = this.settingsProvider.Get<string>(Constants.Settings.LOGIN_NAME_SETTING_KEY);
                string pwd = this.settingsProvider.Get<string>(Constants.Settings.PASSWORD_SETTING_KEY);
                WebOperationContext.Current.OutgoingRequest.Headers.Add(
                    Taloyhtio.GeneralApi.Common.Constants.HttpHeaders.Username, loginName);
                WebOperationContext.Current.OutgoingRequest.Headers.Add(
                    Taloyhtio.GeneralApi.Common.Constants.HttpHeaders.Password, pwd);

                this.logger.Info("Start processing items...");
                // pairs of (original index, result)
                var results = new List<KeyValuePair<int, bool>>();
                int count = items.Count;
                for (int i = 0; i < count; i++)
                {
                    var item = items[i];
                    if (item == null)
                    {
                        this.logger.WarnFormat("Item with index '{0}' is null. Skip it", i);
                        continue;
                    }
                    this.logger.InfoFormat("Send item with index '{0}': {1}...", i, item.ToString());
                    bool result = this.send(item, proxy);
                    results.Add(new KeyValuePair<int, bool>(i, result));
                    this.logger.InfoFormat("Complete sending item with index '{0}'", i);
                }
                this.logger.Info("Finish processing items");
                bool commonResult = results.All(r => r.Value);
                this.logger.InfoFormat("Common result is '{0}'", commonResult);
                this.logger.Info("Detailed result:");
                for (int i = 0; i < results.Count; i++)
                {
                    this.logger.InfoFormat("Index {0}: {1}", results[i].Key, results[i].Value);
                }
                this.logger.Info("End of detailed result");
                return commonResult;
           }
        }

        private bool send(T item, TaloyhtioIntegrationClient proxy)
        {
            try
            {
                if (item == null)
                {
                    this.logger.Error("Item is null. It will not be sent");
                    return false;
                }

                if (proxy == null)
                {
                    this.logger.Error("Proxy is null. Item will not be sent");
                    return false;
                }

                this.logger.InfoFormat("Sending item information to Taloyhtio...");

                //proxy.SaveCondoInformation(item);
                this.sender.Send(item, proxy);
                this.logger.Info("Item information was successfully sent");

                return true;
            }
            catch (Exception x)
            {
                this.logger.ErrorFormat(string.Format("Error occured during sending item information:\n{0}\n{1}", x.Message, x.StackTrace));
                return false;
            }
        }
    }
}