// -----------------------------------------------------------------------
// <copyright file="FeedbackViewModel.cs" company="GRNET">
// Copyright 2011-2012 GRNET S.A. All rights reserved.
// 
// Redistribution and use in source and binary forms, with or
// without modification, are permitted provided that the following
// conditions are met:
// 
//   1. Redistributions of source code must retain the above
//      copyright notice, this list of conditions and the following
//      disclaimer.
// 
//   2. Redistributions in binary form must reproduce the above
//      copyright notice, this list of conditions and the following
//      disclaimer in the documentation and/or other materials
//      provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// 
// The views and conclusions contained in the software and
// documentation are those of the authors and should not be
// interpreted as representing official policies, either expressed
// or implied, of GRNET S.A.
// </copyright>
// -----------------------------------------------------------------------


using System.Collections.Specialized;
using System.ComponentModel.Composition;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.IO;
using System.Net;
using System.Reflection;
using System.Windows;
using Caliburn.Micro;
using Pithos.Client.WPF.Properties;

namespace Pithos.Client.WPF.Shell
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    /// <summary>
    /// TODO: Update summary.
    /// </summary>
    [Export(typeof(FeedbackViewModel))]
    public class FeedbackViewModel:Screen
    {        
        public string Message { get; set; }

        public string Data { get; set; }

        private IWindowManager _windowManager;

        private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos");


        [ImportingConstructor]
        public FeedbackViewModel(IWindowManager windowManager)
        {
            _windowManager = windowManager;
            Data = GetBasicData() ;
        }

        public void AppendData(string data)
        {
            Data = Data + "\r\n" + data;
        }

        private string GetBasicData()
        {
            Assembly assembly = Assembly.GetExecutingAssembly();

            var attributes = assembly.GetCustomAttributes(false);
            var versionAtt = attributes.OfType<AssemblyInformationalVersionAttribute>().First();
            var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
            var released = DateTime.Parse(versionAtt.InformationalVersion);


            var builder = new StringBuilder();
            
            builder.AppendLine("Pithos Windows Client")
                .Append('-', 30)
                .AppendLine()
                .AppendFormat("Released: {0}\r\n", released)
                .AppendFormat("File Version: {0}\r\n", fileVersion.FileVersion)
                .AppendFormat("Assembly Version: {0}\r\n", assembly.GetName().Version)
                .AppendFormat("OS: {0} 64Bit: {1}\r\n",Environment.OSVersion,Environment.Is64BitOperatingSystem)
                .AppendFormat("Wokring Set: {0} bytes\r\n", Environment.WorkingSet)
                .AppendFormat("Processors: {0} \r\n", Environment.ProcessorCount)                
                .Append('=', 30)
                .AppendLine();
            var basicData = builder.ToString();
            return basicData;

        }
        
        public void Send()
        {
            var message = "Pithos Windows Client Feedback:\r\n" +Message;
            var fields = new Dictionary<string, string> { { "feedback-msg", message }, { "feedback-data", Data } };
            string token="0007";
            if (Settings.Default.Accounts.Count>0)
                token = Settings.Default.Accounts[0].ApiKey;
            try
            {
                PostForm(Settings.Default.FeedbackUri, token,fields);
            }
            catch (Exception exc)
            {
                Log.Error("Failed to submit feedback",exc);
                MessageBox.Show("There was an error while submitting your feedback. The error was logged", "Failed to submit feedback",
                                MessageBoxButton.OK, MessageBoxImage.Error);
            }
            
            TryClose();
        }

        private void PostForm(string formUrl, string token,Dictionary<string, string> fields)
        {

            if (String.IsNullOrWhiteSpace(formUrl))
                throw new ArgumentNullException("formUrl");
            if (String.IsNullOrWhiteSpace(token))
                throw new ArgumentNullException("token");
            if (fields == null)
                throw new ArgumentNullException("fields");
            Contract.EndContractBlock();


            var client = new WebClient();
            client.Headers.Add("X-Auth-Token", token);

            var values=new NameValueCollection();
            fields.Apply(field => values.Add(field.Key, Uri.EscapeDataString(field.Value)));
            try
            {
                client.UploadValues(formUrl, values);
            }
            catch (WebException exc)
            {
                Log.WarnFormat("Unexpected status returned from feedback form: {0} - {1}", exc.Status,exc.Message);                    
            }
        }
    }
}