using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.ComponentModel.Composition;
using System.Linq;
using System.Linq.Expressions;
using System.Net;
using System.Net.Mail;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Caliburn.Micro;
using Pithos.Client.WPF.Shell;
using Pithos.Network;

namespace Pithos.Client.WPF
{
    /// <summary>
    /// Interaction logic for MessageView.xaml
    /// </summary>
    public partial class MessageView : Window, INotifyPropertyChanged
    {
        public ObservableCollection<UserMessage> UserMessages { get; set; }

        private string _message;
        public string Message
        {
            get
            {
                return _message;
            }
            set
            {
                _message = value;
                NotifyOfPropertyChange(()=>Message);
            }
        }


        public MessageView(IEnumerable<UserMessage> userMessages)
        {
            UserMessages = new ObservableCollection<UserMessage>(userMessages);
            DataContext = this;
            InitializeComponent();            
        }


        
        public MessageView(WebException exception)
        {
            DataContext = this;
            InitializeComponent();

            var messages = new List<UserMessage>();
            
            if ((exception.Response as HttpWebResponse).StatusCode == HttpStatusCode.Unauthorized)
            {
                Message = "Your authorization token has expired. Please renew the token and try again ";
                Title = "Authorization expired";
            }
            else
            {
                messages.Add(new UserMessage
                {
                    Message = exception.InnerException.Message,
                    Details = exception.InnerException.ToString(),
                    Severity = Severity.Warn
                });
                Message = "There was an error while retrieving the item's information";
                Title = "Error";
            }
            UserMessages = new ObservableCollection<UserMessage>(messages);
        }

        public MessageView(RetryException exception)
        {
            DataContext = this;
            InitializeComponent();

            var messages = new List<UserMessage>{
                new UserMessage{
                        Message = exception.InnerException.Message,
                        Details = exception.InnerException.ToString(),
                        Severity = Severity.Warn
                    }
            };

            Title = "Network error";
            Message = "The connection to the server timed out. Please check your network connection and try again later";                

            UserMessages = new ObservableCollection<UserMessage>(messages);
        }
        
        public MessageView(Exception exception)
        {
            DataContext = this;
            InitializeComponent();

            var messages = new List<UserMessage>{
                new UserMessage{
                        Message = exception.InnerException.Message,
                        Details = exception.InnerException.ToString(),
                        Severity = Severity.Warn
                    }
            };

            Title = "Unexpected error";
            Message = "An unexpected error has occured";                

            UserMessages = new ObservableCollection<UserMessage>(messages);
        }

        /// <summary>
        /// Copies the messages to the clipboard
        /// </summary>
        private void OnCopy(object sender, ExecutedRoutedEventArgs e)
        {
            var text = GetLogText();
            Clipboard.SetText(text);
        }

        private string GetLogText()
        {
            StringBuilder logText = new StringBuilder()
                .Append('-', 30)
                .AppendLine("\r\nPithos")
                .Append('-', 30)
                .AppendLine()
                .AppendLine();
            foreach (var message in UserMessages)
            {
                logText
                    .Append('-', 20)
                    .AppendFormat("\r\n[{0,5}]\t{1}", message.Severity, message.Message)
                    .AppendLine()
                    .AppendLine(message.Details)
                    .AppendLine();
            }

            var text = logText.ToString();
            return text;
        }

        private void OnClose(object sender, ExecutedRoutedEventArgs e)
        {
            this.Close();
        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property)
        {
            if (PropertyChanged!=null)
                PropertyChanged(this,new PropertyChangedEventArgs(property.GetMemberInfo().Name));
        }

        private void OnSend(object sender, RoutedEventArgs e)
        {
            var manager=IoC.Get<IWindowManager>();
            var logText = GetLogText();
            var feedBack = IoC.Get<FeedbackViewModel>();
            feedBack.AppendData(logText);
            manager.ShowWindow(feedBack);
            this.Close();
        }
    }

    public class UserMessage
    {
        public string Message { get; set; }

        public Severity Severity { get; set; }
        public string Details { get; set; }
    }

    public enum Severity
    {
        Info,
        Warn,
        Error
    }
}