/*

  This Source Code Form is subject to the terms of the Mozilla Public

  License, v. 2.0. If a copy of the MPL was not distributed with this

  file, You can obtain one at http://mozilla.org/MPL/2.0/.

  Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>

*/

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Text;

using System.Diagnostics;

using System.Windows.Forms;

using System.Windows;

using OpenHardwareMonitor.Hardware;

using OpenHardwareMonitor.Utilities;

using System.Runtime.InteropServices;

using System.ServiceModel;

using SharpLib.Display;

namespace OpenHardwareMonitor.GUI

{

    public class SharpDisplay : IDisposable

    {

        private IComputer computer;

        private PersistentSettings settings;

        private UnitManager unitManager;

        private List<SensorSharpDisplay> iSensors = new List<SensorSharpDisplay>();

        private Client iClient;

        TextField iTextFieldTop;

        TextField iTextFieldBottom;

        TextField iTextFieldTopRight;

        TextField iTextFieldBottomRight;

        DataField[] iTextFields;

        private int iNextSensorToDisplay = 0;

        private int iTickCounter = 0;

        bool iPacked = false;

        public SharpDisplay(IComputer computer, PersistentSettings settings, UnitManager unitManager)

        {

            this.computer = computer;

            this.settings = settings;

            this.unitManager = unitManager;

            computer.HardwareAdded += new HardwareEventHandler(HardwareAdded);

            computer.HardwareRemoved += new HardwareEventHandler(HardwareRemoved);

            //Connect our client

            //Instance context is then managed by our client class

            iClient = new Client();

            iClient.CloseOrderEvent += OnCloseOrder;

            //

            iTextFieldTop = new TextField("", ContentAlignment.MiddleLeft,0,0);

			iTextFieldBottom = new TextField("", ContentAlignment.MiddleLeft, 0, 1);

			iTextFieldTopRight = new TextField("", ContentAlignment.MiddleRight,1,0);

			iTextFieldBottomRight = new TextField("", ContentAlignment.MiddleRight,1,1);

			//

			iClient.Open();

			iClient.SetName("Open Hardware Monitor");

            iClient.SetPriority(Priorities.SystemMonitor);

            CreateFields();

        }

        public void OnCloseOrder()

        {            

            iClient.Close();

        }

        private void HardwareRemoved(IHardware hardware)

        {

            hardware.SensorAdded -= new SensorEventHandler(SensorAdded);

            hardware.SensorRemoved -= new SensorEventHandler(SensorRemoved);

            foreach (ISensor sensor in hardware.Sensors)

                SensorRemoved(sensor);

            foreach (IHardware subHardware in hardware.SubHardware)

                HardwareRemoved(subHardware);

        }

        private void HardwareAdded(IHardware hardware)

        {

            foreach (ISensor sensor in hardware.Sensors)

                SensorAdded(sensor);

            hardware.SensorAdded += new SensorEventHandler(SensorAdded);

            hardware.SensorRemoved += new SensorEventHandler(SensorRemoved);

            foreach (IHardware subHardware in hardware.SubHardware)

                HardwareAdded(subHardware);

        }

        private void SensorAdded(ISensor sensor)

        {

            if (settings.GetValue(new Identifier(sensor.Identifier,

              "SharpDisplay").ToString(), false))

                Add(sensor, false);

        }

        private void SensorRemoved(ISensor sensor)

        {

            if (Contains(sensor))

                Remove(sensor, false);

        }

        public void Dispose()

        {

            foreach (SensorSharpDisplay icon in iSensors)

                icon.Dispose();

            Quit();            

            //iServer.Stop();

            iClient.Close();

        }

		private void CreateFields()

		{

			if (iPacked)

            {

                //We just switched to packed mode                    

                //Make sure our layout is proper

                TableLayout layout = new TableLayout(2, 2);

                iClient.SetLayout(layout);

				iTextFields = new DataField[] { iTextFieldTop, iTextFieldBottom, iTextFieldTopRight, iTextFieldBottomRight };

				iClient.CreateFields(iTextFields);

            }

            else

            {

                //Non packed mode

                TableLayout layout = new TableLayout(1, 2);

                iClient.SetLayout(layout);

				iTextFields = new DataField[] { iTextFieldTop, iTextFieldBottom };

				iClient.CreateFields(iTextFields);

            }

		}

        public void Redraw(bool aPacked, bool aDisplayTime)

        {

            const int KNumberOfTickBeforeSwitch = 4;

            const int KMaxCharacterPerLine = 16;

            int count = 0;

            //string time = DateTime.Now.ToShortTimeString();

            string time = DateTime.Now.ToLongTimeString();

            if (iSensors.Count > 0)

            {

                if (iPacked != aPacked)

                {

                    //Remember mode

                    iPacked = aPacked;

					CreateFields();

                }

            }

            //Update all sensors from our front view

            foreach (SensorSharpDisplay sensor in iSensors)

            {

                count++;

                sensor.Update();

                if (aDisplayTime && count == 1)

                {

                    //First slot is taken by time display

                    count++;

                    iTextFieldTop.Text = time;

                    iClient.SetField(iTextFieldTop);

                }

                if (aPacked)

                {

                    //Build strings for packed mode

                    string packedText = "";

                    packedText = sensor.iFirstLine.Substring(0, 3) + ":" + sensor.iSecondLine;

                    if (count == 1)

                    {

                        iTextFieldTop.Text = packedText;

						iClient.SetField(iTextFieldTop);

                    }

                    else if (count == 2)

                    {

                        iTextFieldBottom.Text = packedText;

						iClient.SetField(iTextFieldBottom);

                    }

                    else if (count == 3)

                    {

                        iTextFieldTopRight.Text = packedText;

						iClient.SetField(iTextFieldTopRight);

                    }

                    else if (count == 4)

                    {

                        iTextFieldBottomRight.Text = packedText;

						iClient.SetField(iTextFieldBottomRight);

                    }

                }

            }

            //Alternate between sensors 

            if (iSensors.Count > 0)

            {

                if (aPacked)

                {

                    //Review that stuff cause as it is it's probably useless

                    //string packedLine = "";

                    iTickCounter++;

                    if (iTickCounter == KNumberOfTickBeforeSwitch) //Move to the next sensor only every so many tick

                    {

                        iTickCounter = 0;

                        if (iNextSensorToDisplay == 1)

                        {

                            iNextSensorToDisplay = 0;

                        }

                        else

                        {

                            iNextSensorToDisplay = 1;

                        }

                    }

                }

                else

                {

                    string secondLine = iSensors[iNextSensorToDisplay].iSecondLine;

                    if (aDisplayTime)

                    {

                        //Add enough spaces

                        while (secondLine.Length + time.Length < KMaxCharacterPerLine)

                        {

                            secondLine += " ";

                        }

                        secondLine += time;

                    }

                    //Display current sensor on our FrontView display

                    SetText(iSensors[iNextSensorToDisplay].iFirstLine, secondLine);

                    iTickCounter++;

                    if (iTickCounter == KNumberOfTickBeforeSwitch) //Move to the next sensor only every so many tick

                    {

                        iTickCounter = 0;

                        iNextSensorToDisplay++;

                    }

                }

            }

            if (iNextSensorToDisplay == iSensors.Count)

            {

                //Go back to first sensor

                iNextSensorToDisplay = 0;

            }

        }

        public bool Contains(ISensor sensor)

        {

            foreach (SensorSharpDisplay icon in iSensors)

                if (icon.Sensor == sensor)

                    return true;

            return false;

        }

        public void Add(ISensor sensor, bool balloonTip)

        {

            if (Contains(sensor))

            {

                return;

            }

            else

            {

                //SL:

                iSensors.Add(new SensorSharpDisplay(this, sensor, balloonTip, settings, unitManager));

                //UpdateMainIconVisibilty();

                settings.SetValue(new Identifier(sensor.Identifier, "SharpDisplay").ToString(), true);

                iNextSensorToDisplay = 0;

                if (iSensors.Count == 1)

                {

                    //Just added first sensor in FrontView, unable FrontView plug-in mode

                    Init();

                }

            }

        }

        public void Remove(ISensor sensor)

        {

            Remove(sensor, true);

            iNextSensorToDisplay = 0;

            if (iSensors.Count == 0)

            {

                //No sensor to display in FrontView, just disable FrontView plug-in mode

                Uninit();

            }

        }

        private void Remove(ISensor sensor, bool deleteConfig)

        {

            if (deleteConfig)

            {

                settings.Remove(

                  new Identifier(sensor.Identifier, "SharpDisplay").ToString());

            }

            SensorSharpDisplay instance = null;

            foreach (SensorSharpDisplay icon in iSensors)

                if (icon.Sensor == sensor)

                    instance = icon;

            if (instance != null)

            {

                iSensors.Remove(instance);

                //UpdateMainIconVisibilty();

                instance.Dispose();

            }

        }

        private void UpdateMainIconVisibilty()

        {

            /*

            if (mainIconEnabled)

            {

                mainIcon.Visible = list.Count == 0;

            }

            else

            {

                mainIcon.Visible = false;

            }

             */

        }

        public void Init()

        {

            //iServer.SendMessage("init:");

        }

        public void Uninit()

        {

            //iServer.SendMessage("uninit:");

        }

        public void SetText(string aUpperLine, string aLowerLine)

        {

            //iServer.SendMessage("set-vfd-text:" + aUpperLine + "\n" + aLowerLine);

            iTextFieldTop.Text = aUpperLine;

            iTextFieldBottom.Text = aLowerLine;

            iClient.SetFields(iTextFields);

        }

        public void Quit()

        {

            //iServer.SendMessage("quit:");

        }

        /*

        public bool IsMainIconEnabled

        {

            get { return mainIconEnabled; }

            set

            {

                if (mainIconEnabled != value)

                {

                    mainIconEnabled = value;

                    UpdateMainIconVisibilty();

                }

            }

        }*/

    }

}