#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Windows.Forms;
using System.Xml.Serialization;
using HeuristicLab.Calendar;
using HeuristicLab.Hive.Slave.Console.SlaveConsoleService;
using ZedGraph;

namespace HeuristicLab.Hive.Slave.Console {

  #region Delegates

  //delegate to write text in the textbox from another process
  public delegate void AppendTextDelegate(String message);

  //delegate to remove text in the textbox from another process
  public delegate void RemoveTextDelegate(int newLength, int maxChars);

  //delegate fired, if a dialog is being closed
  public delegate void OnDialogClosedDelegate(RecurrentEvent e);

  #endregion

  public partial class HiveSlaveConsole : Form {

    #region Declarations
    private static bool isfired = false;
    //the logfilereader
    private ILogReader logFileReader;

    //communication with the slave
    private SlaveConsoleCommunicatorClient slaveCommunicator;

    //the timer for refreshing the gui
    private System.Windows.Forms.Timer refreshTimer;

    //the list of appointments in the calender
    [XmlArray("Appointments")]
    [XmlArrayItem("Appointment", typeof(Appointment))]
    public List<Appointment> onlineTimes = new List<Appointment>();

    public OnDialogClosedDelegate dialogClosedDelegate;

    #endregion

    #region Constructor

    public HiveSlaveConsole() {
      InitializeComponent();
      InitTimer();
      ConnectToSlave();
      RefreshGui();
      InitCalender();
      InitLogFileReader();
    }

    #endregion

    #region Methods

    #region Client connection

    private void ConnectToSlave() {
      try {
        slaveCommunicator = new SlaveConsoleCommunicatorClient();

        slaveCommunicator.GetStatusInfosCompleted += new EventHandler<GetStatusInfosCompletedEventArgs>(slaveCommunicator_GetStatusInfosCompleted);
        slaveCommunicator.GetUptimeCalendarCompleted += new EventHandler<GetUptimeCalendarCompletedEventArgs>(slaveCommunicator_GetUptimeCalendarCompleted);
        slaveCommunicator.SetUptimeCalendarCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(slaveCommunicator_SetUptimeCalendarCompleted);
      } catch (Exception ex) {
        ManageFatalException("Connection Error, check if Hive Slave is running!", "Connection Error", ex);
      }
    }

    #endregion

    #region Logging

    private void InitLogFileReader() {
      //logFileReader = new LogFileReader(AppDomain.CurrentDomain.BaseDirectory + @"/Hive.Slave.log");
      logFileReader = new LogServiceReader();
      logFileReader.MoreData += new MoreDataHandler(logFileReader_MoreData);
      logFileReader.Start();
    }

    private void logFileReader_MoreData(object sender, string newData) {
      int maxChars = txtLog.MaxLength;
      if (newData.Length > maxChars) {
        newData = newData.Remove(0, newData.Length - maxChars);
      }
      int newLength = this.txtLog.Text.Length + newData.Length;
      if (newLength > maxChars) {
        RemoveText(newLength, maxChars);
      }
      AppendText(newData);
    }

    private void RemoveText(int newLength, int maxChars) {
      if (this.txtLog.InvokeRequired) {
        this.txtLog.Invoke(new
          RemoveTextDelegate(RemoveText), new object[] { newLength, maxChars });
      } else {
        this.txtLog.Text = this.txtLog.Text.Remove(0, newLength - (int)maxChars);
      }
    }

    private void AppendText(string message) {
      if (this.txtLog.InvokeRequired) {
        this.txtLog.Invoke(new
          AppendTextDelegate(AppendText), new object[] { message });
      } else {
        this.txtLog.AppendText(message);
      }
    }

    #endregion

    #region Gui Refresh

    private void InitTimer() {
      refreshTimer = new System.Windows.Forms.Timer();
      refreshTimer.Interval = 1000;
      refreshTimer.Tick += new EventHandler(refreshTimer_Tick);
      refreshTimer.Start();
    }

    private void RefreshGui() {
      try {
        slaveCommunicator.GetStatusInfosAsync();
      } catch (Exception ex) {
        ManageFatalException("Connection Error, check if Hive Slave is running!", "Connection Error", ex);
      }
    }

    private void UpdateGraph(StatusCommons sc) {
      ZedGraphControl zgc = new ZedGraphControl();
      GraphPane myPane = zgc.GraphPane;
      myPane.GraphObjList.Clear();

      myPane.Title.IsVisible = false;  // no title
      myPane.Border.IsVisible = false; // no border
      myPane.Chart.Border.IsVisible = false; // no border around the chart
      myPane.XAxis.IsVisible = false;  // no x-axis
      myPane.YAxis.IsVisible = false;  // no y-axis
      myPane.Legend.IsVisible = false; // no legend

      myPane.Fill.Color = this.BackColor;

      myPane.Chart.Fill.Type = FillType.None;
      myPane.Fill.Type = FillType.Solid;

      double allProgress = 0;
      double done = 0;


      /*if (jobs.Length == 0)
      {
        myPane.AddPieSlice(100, Color.Green, 0.1, "");
      }
      else
      {
        for (int i = 0; i < jobs.Length; i++)
        {
          allProgress += jobs[i].Progress;
        } */

      //done = allProgress / jobs.Length;

      myPane.AddPieSlice((sc.FreeCores / (double)sc.TotalCores), Color.Red, 0, "");
      myPane.AddPieSlice(((sc.TotalCores - sc.FreeCores) / (double)sc.TotalCores), Color.Green, 0, "");
      // }
      //Hides the slice labels
      PieItem.Default.LabelType = PieLabelType.None;

      myPane.AxisChange();

      pbGraph.Image = zgc.GetImage();
    }

    #region Events

    private void refreshTimer_Tick(object sender, EventArgs e) {
      RefreshGui();
    }

    #endregion


    #endregion

    #region Calendar stuff

    private void InitCalender() {
      dvOnline.StartDate = DateTime.Now;
      dvOnline.OnNewAppointment += new EventHandler<NewAppointmentEventArgs>(dvOnline_OnNewAppointment);
      dvOnline.OnResolveAppointments += new EventHandler<ResolveAppointmentsEventArgs>(dvOnline_OnResolveAppointments);

      //get calender from slave
      slaveCommunicator.GetUptimeCalendarAsync();
    }

    private bool CreateAppointment() {
      DateTime from, to;

      if (!string.IsNullOrEmpty(dtpFrom.Text) && !string.IsNullOrEmpty(dtpTo.Text)) {
        if (chbade.Checked) {
          //whole day appointment, only dates are visible
          if (DateTime.TryParse(dtpFrom.Text, out from) && DateTime.TryParse(dtpTo.Text, out to) && from <= to)
            onlineTimes.Add(CreateAppointment(from, to.AddDays(1), true));
          else
            MessageBox.Show("Incorrect date format", "Schedule Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        } else if (!string.IsNullOrEmpty(txttimeFrom.Text) && !string.IsNullOrEmpty(txttimeTo.Text)) {
          //Timeframe appointment
          if (DateTime.TryParse(dtpFrom.Text + " " + txttimeFrom.Text, out from) && DateTime.TryParse(dtpTo.Text + " " + txttimeTo.Text, out to) && from < to) {
            if (from.Date == to.Date)
              onlineTimes.Add(CreateAppointment(from, to, false));
            else {
              //more than 1 day selected
              while (from.Date != to.Date) {
                onlineTimes.Add(CreateAppointment(from, new DateTime(from.Year, from.Month, from.Day, to.Hour, to.Minute, 0, 0), false));
                from = from.AddDays(1);
              }
              onlineTimes.Add(CreateAppointment(from, new DateTime(from.Year, from.Month, from.Day, to.Hour, to.Minute, 0, 0), false));
            }
          } else
            MessageBox.Show("Incorrect date format", "Schedule Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
        dvOnline.Invalidate();
        return true;
      } else {
        MessageBox.Show("Error in create appointment, please fill out all textboxes!", "Schedule Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return false;
      }
    }

    private Appointment CreateAppointment(DateTime startDate, DateTime endDate, bool allDay) {
      Appointment App = new Appointment();
      App.StartDate = startDate;
      App.EndDate = endDate;
      App.AllDayEvent = allDay;
      App.BorderColor = Color.Red;
      App.Locked = true;
      App.Subject = "Online";
      App.Recurring = false;
      return App;
    }

    private Appointment CreateAppointment(DateTime startDate, DateTime endDate, bool allDay, bool recurring, Guid recurringId) {
      Appointment App = new Appointment();
      App.StartDate = startDate;
      App.EndDate = endDate;
      App.AllDayEvent = allDay;
      App.BorderColor = Color.Red;
      App.Locked = true;
      App.Subject = "Online";
      App.Recurring = recurring;
      App.RecurringId = recurringId;
      return App;
    }

    private void DeleteAppointment() {
      onlineTimes.Remove(dvOnline.SelectedAppointment);
    }

    private void DeleteRecurringAppointment(Guid recurringId) {
      onlineTimes.RemoveAll(a => a.RecurringId.ToString() == dvOnline.SelectedAppointment.RecurringId.ToString());
    }

    private void ChangeRecurrenceAppointment(Guid recurringId) {
      int hourfrom = int.Parse(txttimeFrom.Text.Substring(0, txttimeFrom.Text.IndexOf(':')));
      int hourTo = int.Parse(txttimeTo.Text.Substring(0, txttimeTo.Text.IndexOf(':')));
      List<Appointment> recurringAppointments = onlineTimes.Where(appointment => appointment.RecurringId == recurringId).ToList();
      recurringAppointments.ForEach(appointment => appointment.StartDate = new DateTime(appointment.StartDate.Year, appointment.StartDate.Month, appointment.StartDate.Day, hourfrom, 0, 0));
      recurringAppointments.ForEach(appointment => appointment.EndDate = new DateTime(appointment.EndDate.Year, appointment.EndDate.Month, appointment.EndDate.Day, hourTo, 0, 0));

      DeleteRecurringAppointment(recurringId);
      onlineTimes.AddRange(recurringAppointments);
    }

    public void DialogClosed(RecurrentEvent e) {
      CreateDailyRecurrenceAppointments(e.DateFrom, e.DateTo, e.AllDay, e.IncWeeks, e.WeekDays);
    }

    private void CreateDailyRecurrenceAppointments(DateTime dateFrom, DateTime dateTo, bool allDay, int incWeek, HashSet<DayOfWeek> daysOfWeek) {
      DateTime incDate = dateFrom;
      Guid guid = Guid.NewGuid();

      while (incDate.Date <= dateTo.Date) {
        if (daysOfWeek.Contains(incDate.Date.DayOfWeek))
          onlineTimes.Add(CreateAppointment(incDate, new DateTime(incDate.Year, incDate.Month, incDate.Day, dateTo.Hour, dateTo.Minute, 0), allDay, true, guid));
        incDate = incDate.AddDays(1);
      }

      dvOnline.Invalidate();
    }

    #region Calendar Events

    private void btbDelete_Click(object sender, EventArgs e) {
      Appointment selectedAppointment = dvOnline.SelectedAppointment;
      if (dvOnline.SelectedAppointment != null) {
        if (!selectedAppointment.Recurring)
          DeleteAppointment();
        else {
          DialogResult res = MessageBox.Show("Delete all events in this series?", "Delete recurrences", MessageBoxButtons.YesNo);
          if (res != DialogResult.Yes)
            DeleteAppointment();
          else
            DeleteRecurringAppointment(selectedAppointment.RecurringId);
        }
      }
      dvOnline.Invalidate();
    }

    private void chbade_CheckedChanged(object sender, EventArgs e) {
      txttimeFrom.Visible = !chbade.Checked;
      txttimeTo.Visible = !chbade.Checked;
    }

    private void dvOnline_OnSelectionChanged(object sender, EventArgs e) {
      //btCreate.Enabled = true;
      if (dvOnline.Selection == SelectionType.DateRange) {
        dtpFrom.Text = dvOnline.SelectionStart.ToShortDateString();
        dtpTo.Text = dvOnline.SelectionEnd.Date.ToShortDateString();
        txttimeFrom.Text = dvOnline.SelectionStart.ToShortTimeString();
        txttimeTo.Text = dvOnline.SelectionEnd.ToShortTimeString();

        btCreate.Text = "Save";
      }

      if (dvOnline.Selection == SelectionType.Appointment) {

        dtpFrom.Text = dvOnline.SelectedAppointment.StartDate.ToShortDateString();
        dtpTo.Text = dvOnline.SelectedAppointment.EndDate.ToShortDateString();
        txttimeFrom.Text = dvOnline.SelectedAppointment.StartDate.ToShortTimeString();
        txttimeTo.Text = dvOnline.SelectedAppointment.EndDate.ToShortTimeString();

        if (dvOnline.SelectedAppointment.Recurring)
          //btCreate.Enabled = false;
          //also change the caption of the save button
          btCreate.Text = "Save changes";
      }

      if (dvOnline.Selection == SelectionType.None) {
        //also change the caption of the save button
        btCreate.Text = "Save";
      }

    }

    private void mcOnline_DateChanged(object sender, DateRangeEventArgs e) {
      dvOnline.StartDate = mcOnline.SelectionStart;
    }

    private void btCreate_Click(object sender, EventArgs e) {
      if (dvOnline.Selection != SelectionType.Appointment) {
        CreateAppointment();
      } else {
        //now we want to change an existing appointment
        if (!dvOnline.SelectedAppointment.Recurring) {
          if (CreateAppointment())
            DeleteAppointment();
        } else {
          //change recurring appointment
          //check, if only selected appointment has to change or whole recurrence
          DialogResult res = MessageBox.Show("Change all events in this series?", "Change recurrences", MessageBoxButtons.YesNo);
          if (res != DialogResult.Yes) {
            if (CreateAppointment())
              DeleteAppointment();
          } else
            ChangeRecurrenceAppointment(dvOnline.SelectedAppointment.RecurringId);
        }
      }
      dvOnline.Invalidate();
    }

    private void btnRecurrence_Click(object sender, EventArgs e) {
      Recurrence recurrence = new Recurrence();
      recurrence.dialogClosedDelegate = new OnDialogClosedDelegate(this.DialogClosed);
      recurrence.Show();
    }

    private void btnSaveCal_Click(object sender, EventArgs e) {
      slaveCommunicator.SetUptimeCalendarAsync(onlineTimes);
    }

    private void dvOnline_OnResolveAppointments(object sender, ResolveAppointmentsEventArgs e) {
      List<Appointment> Apps = new List<Appointment>();

      foreach (Appointment m_App in onlineTimes)
        if ((m_App.StartDate >= e.StartDate) &&
            (m_App.StartDate <= e.EndDate))
          Apps.Add(m_App);
      e.Appointments = Apps;
    }

    private void btnUpdateCalender_Click(object sender, EventArgs e) {
      slaveCommunicator.GetUptimeCalendarAsync();
    }

    private void dvOnline_OnNewAppointment(object sender, NewAppointmentEventArgs e) {
      Appointment Appointment = new Appointment();

      Appointment.StartDate = e.StartDate;
      Appointment.EndDate = e.EndDate;

      onlineTimes.Add(Appointment);
    }

    #endregion

    #endregion

    #region Slave communicator events

    void slaveCommunicator_SetUptimeCalendarCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e) {
      if (e.Error == null) {
        MessageBox.Show("Calendar successfully saved!", "Calender", MessageBoxButtons.OK, MessageBoxIcon.Information);
      } else {
        MessageBox.Show("Error saving calender \n" + e.Error.ToString(), "Calender", MessageBoxButtons.OK, MessageBoxIcon.Error);
      }
    }

    void slaveCommunicator_GetUptimeCalendarCompleted(object sender, GetUptimeCalendarCompletedEventArgs e) {
      if (e.Error == null) {
        if (e.Result != null) {
          onlineTimes = e.Result.ToList<Appointment>();
          onlineTimes.ForEach(a => a.BorderColor = Color.Red);
          dvOnline.Invalidate();

        } else {
          onlineTimes = new List<Appointment>();
        }
      }
    }

    private void slaveCommunicator_GetStatusInfosCompleted(object sender, GetStatusInfosCompletedEventArgs e) {
      if (e.Error == null) {
        StatusCommons sc = e.Result;

        lbGuid.Text = sc.ClientGuid.ToString();
        lbConnectionStatus.Text = sc.Status.ToString();
        lbJobdone.Text = sc.JobsDone.ToString();
        lbJobsAborted.Text = sc.JobsAborted.ToString();
        lbJobsFetched.Text = sc.JobsFetched.ToString();

        this.Text = "Slave Console (" + sc.Status.ToString() + ")";

        ListViewItem curJobStatusItem;

        if (sc.Jobs != null) {
          lvJobDetail.Items.Clear();
          double progress;
          foreach (JobStatus curJob in sc.Jobs) {
            curJobStatusItem = new ListViewItem(curJob.JobId.ToString());
            curJobStatusItem.SubItems.Add(curJob.Since.ToString());
            lvJobDetail.Items.Add(curJobStatusItem);
          }
          lvJobDetail.Sort();
        }

        UpdateGraph(sc);
      } else {
        ManageFatalException("Connection Error, check if Hive Slave is running!", "Connection Error", null);
      }
    }

    #endregion

    #region Exception
    private void ManageFatalException(string body, string caption, Exception e) {
      if (!isfired) {
        isfired = true;
        refreshTimer.Stop();
        
        DialogResult res;
        if (e != null) {
          res = MessageBox.Show(body + "\n" + e.Message + ": " + e.StackTrace, caption, MessageBoxButtons.OK, MessageBoxIcon.Error);
        } else {
          res = MessageBox.Show(body + " (no exception available)", caption, MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
        if (res == DialogResult.OK)
          this.Close();
      }
    }

    #endregion

    #endregion

    #region GUI Events


    private void btn_slaveShutdown_Click(object sender, EventArgs e) {
      DialogResult res = MessageBox.Show("Do you really want to shutdown the Hive Slace?", "Hive Slave Console", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
      if (res == DialogResult.Yes) {
        logFileReader.Stop();
        slaveCommunicator.ShutdownClient();
        this.Close();
      }
    }

    #endregion



  }
}