/*

  Version: MPL 1.1/GPL 2.0/LGPL 2.1

  The contents of this file are subject to the Mozilla Public License Version

  1.1 (the "License"); you may not use this file except in compliance with

  the License. You may obtain a copy of the License at

  http://www.mozilla.org/MPL/

  Software distributed under the License is distributed on an "AS IS" basis,

  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

  for the specific language governing rights and limitations under the License.

  The Original Code is the Open Hardware Monitor code.

  The Initial Developer of the Original Code is 

  Michael Möller <m.moeller@gmx.ch>.

  Portions created by the Initial Developer are Copyright (C) 2009-2010

  the Initial Developer. All Rights Reserved.

  Contributor(s):

  Alternatively, the contents of this file may be used under the terms of

  either the GNU General Public License Version 2 or later (the "GPL"), or

  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

  in which case the provisions of the GPL or the LGPL are applicable instead

  of those above. If you wish to allow use of your version of this file only

  under the terms of either the GPL or the LGPL, and not to allow others to

  use your version of this file under the terms of the MPL, indicate your

  decision by deleting the provisions above and replace them with the notice

  and other provisions required by the GPL or the LGPL. If you do not delete

  the provisions above, a recipient may use your version of this file under

  the terms of any one of the MPL, the GPL or the LGPL.

*/

using System;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Drawing.Imaging;

using System.Drawing.Text;

using System.Runtime.InteropServices;

using System.Windows.Forms;

using OpenHardwareMonitor.Hardware;

using OpenHardwareMonitor.Utilities;

namespace OpenHardwareMonitor.GUI {

  public class SensorNotifyIcon : IDisposable {

    private ISensor sensor;

    private NotifyIcon notifyIcon;

    private Bitmap bitmap;

    private Graphics graphics;

    private Color color;

    private Color darkColor;

    private Brush brush;

    private Brush darkBrush;

    private Pen pen;

    private Font font;

    public SensorNotifyIcon(SystemTray sensorSystemTray, ISensor sensor,

      bool balloonTip, PersistentSettings settings) 

    {

      this.sensor = sensor;

      this.notifyIcon = new NotifyIcon();

      Color defaultColor = Color.Black;

      if (sensor.SensorType == SensorType.Load ||

          sensor.SensorType == SensorType.Control ||

          sensor.SensorType == SensorType.Level) 

      {

        defaultColor = Color.FromArgb(0xff, 0x70, 0x8c, 0xf1);

      }

      Color = settings.GetValue(new Identifier(sensor.Identifier, 

        "traycolor").ToString(), defaultColor);      

      this.pen = new Pen(Color.FromArgb(96, Color.Black));

      this.font = SystemFonts.MessageBoxFont;

      ContextMenu contextMenu = new ContextMenu();

      MenuItem hideShowItem = new MenuItem("Hide/Show");

      hideShowItem.Click += delegate(object obj, EventArgs args) {

        sensorSystemTray.SendHideShowCommand();

      };

      contextMenu.MenuItems.Add(hideShowItem);

      contextMenu.MenuItems.Add(new MenuItem("-"));

      MenuItem removeItem = new MenuItem("Remove Sensor");

      removeItem.Click += delegate(object obj, EventArgs args) {

        sensorSystemTray.Remove(this.sensor);

      };

      contextMenu.MenuItems.Add(removeItem);

      MenuItem colorItem = new MenuItem("Change Color...");

      colorItem.Click += delegate(object obj, EventArgs args) {

        ColorDialog dialog = new ColorDialog();

        dialog.Color = Color;

        if (dialog.ShowDialog() == DialogResult.OK) {

          Color = dialog.Color;

          settings.SetValue(new Identifier(sensor.Identifier,

            "traycolor").ToString(), Color);

        }

      };

      contextMenu.MenuItems.Add(colorItem);

      contextMenu.MenuItems.Add(new MenuItem("-"));

      MenuItem exitItem = new MenuItem("Exit");

      exitItem.Click += delegate(object obj, EventArgs args) {

        sensorSystemTray.SendExitCommand();

      };

      contextMenu.MenuItems.Add(exitItem);

      this.notifyIcon.ContextMenu = contextMenu;

      this.notifyIcon.DoubleClick += delegate(object obj, EventArgs args) {

        sensorSystemTray.SendHideShowCommand();

      };

      // get the default dpi to create an icon with the correct size

      float dpiX, dpiY;

      using (Bitmap b = new Bitmap(1, 1, PixelFormat.Format32bppArgb)) {

        dpiX = b.HorizontalResolution;

        dpiY = b.VerticalResolution;

      }

      // adjust the size of the icon to current dpi (default is 16x16 at 96 dpi) 

      int width = (int)Math.Round(16 * dpiX / 96);

      int height = (int)Math.Round(16 * dpiY / 96);

      // make sure it does never get smaller than 16x16

      width = width < 16 ? 16: width;

      height = height < 16 ? 16: height;

      this.bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);      

      this.graphics = Graphics.FromImage(this.bitmap);

      if (Environment.OSVersion.Version.Major > 5) {

        this.graphics.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;

        this.graphics.SmoothingMode = SmoothingMode.HighQuality;

      }

    }

    public ISensor Sensor {

      get { return sensor; }

    }

    public Color Color {

      get { return color; }

      set { 

        this.color = value;

        this.darkColor = Color.FromArgb(255,

          this.color.R / 3,

          this.color.G / 3,

          this.color.B / 3);

        Brush brush = this.brush;

        this.brush = new SolidBrush(this.color);

        if (brush != null)

          brush.Dispose();

        Brush darkBrush = this.darkBrush;

        this.darkBrush = new SolidBrush(this.darkColor);

        if (darkBrush != null)

          darkBrush.Dispose();

      }

    }

    public void Dispose() {      

      Icon icon = notifyIcon.Icon;

      notifyIcon.Icon = null;

      if (icon != null)

        icon.Dispose();      

      notifyIcon.Dispose();

      if (brush != null)

        brush.Dispose();

      if (darkBrush != null)

        darkBrush.Dispose();

      pen.Dispose();

      graphics.Dispose();      

      bitmap.Dispose();      

    }

    private string GetString() {

      if (!sensor.Value.HasValue)

        return "-";

      switch (sensor.SensorType) {

        case SensorType.Voltage:

          return string.Format("{0:F11}", sensor.Value);

        case SensorType.Clock:

          return string.Format("{0:F11}", 1e-3f * sensor.Value);

        case SensorType.Load: 

          return string.Format("{0:F0}", sensor.Value);

        case SensorType.Temperature: 

          return string.Format("{0:F0}", sensor.Value);

        case SensorType.Fan: 

          return string.Format("{0:F11}", 1e-3f * sensor.Value);

        case SensorType.Flow:

          return string.Format("{0:F11}", 1e-3f * sensor.Value);

        case SensorType.Control:

          return string.Format("{0:F0}", sensor.Value);

        case SensorType.Level:

          return string.Format("{0:F0}", sensor.Value);

      }

      return "-";

    }

    private Icon CreateTransparentIcon() {

      graphics.Clear(Color.Black);

      TextRenderer.DrawText(graphics, GetString(), font,

        new Point(-2, 0), Color.White, Color.Black);        

      BitmapData data = bitmap.LockBits(

        new Rectangle(0, 0, bitmap.Width, bitmap.Height),

        ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);

      IntPtr Scan0 = data.Scan0;

      int numBytes = bitmap.Width * bitmap.Height * 4;

      byte[] bytes = new byte[numBytes];

      Marshal.Copy(Scan0, bytes, 0, numBytes);

      bitmap.UnlockBits(data);

      byte red, green, blue;

      for (int i = 0; i < bytes.Length; i += 4) {

        blue = bytes[i];

        green = bytes[i + 1];

        red = bytes[i + 2];

        bytes[i] = color.B;

        bytes[i + 1] = color.G;

        bytes[i + 2] = color.R;

        bytes[i + 3] = (byte)(0.3 * red + 0.59 * green + 0.11 * blue);

      }

      return IconFactory.Create(bytes, bitmap.Width, bitmap.Height, 

        PixelFormat.Format32bppArgb);

    }

    private Icon CreatePercentageIcon() {      

      try {

        graphics.Clear(Color.Transparent);

      } catch (ArgumentException) {

        graphics.Clear(Color.Black);

      }

      graphics.FillRectangle(darkBrush, 0.5f, -0.5f, bitmap.Width - 2, bitmap.Height);

      float value = sensor.Value.GetValueOrDefault();

      float y = 0.16f * (100 - value);

      graphics.FillRectangle(brush, 0.5f, -0.5f + y, bitmap.Width - 2, bitmap.Height - y);

      graphics.DrawRectangle(pen, 1, 0, bitmap.Width - 3, bitmap.Height - 1);

      BitmapData data = bitmap.LockBits(

        new Rectangle(0, 0, bitmap.Width, bitmap.Height),

        ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);

      byte[] bytes = new byte[bitmap.Width * bitmap.Height * 4];

      Marshal.Copy(data.Scan0, bytes, 0, bytes.Length);

      bitmap.UnlockBits(data);

      return IconFactory.Create(bytes, bitmap.Width, bitmap.Height, 

        PixelFormat.Format32bppArgb);

    }

    public void Update() {

      Icon icon = notifyIcon.Icon;

      switch (sensor.SensorType) {

        case SensorType.Load:

        case SensorType.Control:

        case SensorType.Level:

          notifyIcon.Icon = CreatePercentageIcon();

          break;

        default:

          notifyIcon.Icon = CreateTransparentIcon();

          break;

      }

      if (icon != null) 

        icon.Dispose();

      string format = "";

      switch (sensor.SensorType) {

        case SensorType.Voltage: format = "\n{0}: {1:F2} V"; break;

        case SensorType.Clock: format = "\n{0}: {1:F0} MHz"; break;

        case SensorType.Load: format = "\n{0}: {1:F1} %"; break;

        case SensorType.Temperature: format = "\n{0}: {1:F1} °C"; break;

        case SensorType.Fan: format = "\n{0}: {1:F0} RPM"; break;

        case SensorType.Flow: format = "\n{0}: {1:F0} L/h"; break;

        case SensorType.Control: format = "\n{0}: {1:F1} %"; break;

        case SensorType.Level: format = "\n{0}: {1:F1} %"; break;

      }

      string formattedValue = string.Format(format, sensor.Name, sensor.Value);

      string hardwareName = sensor.Hardware.Name;

      hardwareName = hardwareName.Substring(0, 

        Math.Min(63 - formattedValue.Length, hardwareName.Length));

      string text = hardwareName + formattedValue;

      if (text.Length > 63)

        text = null;

      notifyIcon.Text = text;

      notifyIcon.Visible = true;         

    }

  }

}