/*

   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.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 SensorFrontView : IDisposable

     {

         private UnitManager unitManager;

         private ISensor sensor;

         private Bitmap bitmap;

         private Graphics graphics;

         private Color color;

         private Color darkColor;

         private Brush brush;

         private Brush darkBrush;

         private Pen pen;

         private Font font;

         private Font smallFont;

         public SensorFrontView(SoundGraphDisplay soundGraphDisplay, ISensor sensor,

           bool balloonTip, PersistentSettings settings, UnitManager unitManager)

         {

             this.unitManager = unitManager;

             this.sensor = sensor;

             // 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;

             // adjust the font size to the icon size

             FontFamily family = SystemFonts.MessageBoxFont.FontFamily;

             float baseSize;

             switch (family.Name)

             {

                 case "Segoe UI": baseSize = 12; break;

                 case "Tahoma": baseSize = 11; break;

                 default: baseSize = 12; break;

             }

             this.font = new Font(family,

               baseSize * width / 16.0f, GraphicsUnit.Pixel);

             this.smallFont = new Font(family,

               0.75f * baseSize * width / 16.0f, GraphicsUnit.Pixel);

             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()

         {

             if (brush != null)

                 brush.Dispose();

             if (darkBrush != null)

                 darkBrush.Dispose();

             pen.Dispose();

             graphics.Dispose();

             bitmap.Dispose();

             font.Dispose();

             smallFont.Dispose();

         }

         private string GetString()

         {

             if (!sensor.Value.HasValue)

                 return "-";

             switch (sensor.SensorType)

             {

                 case SensorType.Voltage:

                     return string.Format("{0:F1}", sensor.Value);

                 case SensorType.Clock:

                     return string.Format("{0:F1}", 1e-3f * sensor.Value);

                 case SensorType.Load:

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

                 case SensorType.Temperature:

                     if (unitManager.TemperatureUnit == TemperatureUnit.Fahrenheit)

                         return string.Format("{0:F0}",

                           UnitManager.CelsiusToFahrenheit(sensor.Value));

                     else

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

                 case SensorType.Fan:

                     return string.Format("{0:F1}", 1e-3f * sensor.Value);

                 case SensorType.Flow:

                     return string.Format("{0:F1}", 1e-3f * sensor.Value);

                 case SensorType.Control:

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

                 case SensorType.Level:

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

                 case SensorType.Power:

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

                 case SensorType.Data:

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

                 case SensorType.Factor:

                     return string.Format("{0:F1}", sensor.Value);

             }

             return "-";

         }

         private Icon CreateTransparentIcon()

         {

             string text = GetString();

             int count = 0;

             for (int i = 0; i < text.Length; i++)

                 if ((text[i] >= '0' && text[i] <= '9') || text[i] == '-')

                     count++;

             bool small = count > 2;

             graphics.Clear(Color.Black);

             TextRenderer.DrawText(graphics, text, small ? smallFont : font,

               new Point(-2, small ? 1 : 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()

         {

             switch (sensor.SensorType)

             {

                 case SensorType.Load:

                 case SensorType.Control:

                 case SensorType.Level:

                     //notifyIcon.Icon = CreatePercentageIcon();

                     break;

                 default:

                     //notifyIcon.Icon = CreateTransparentIcon();

                     break;

             }

             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;

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

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

                 case SensorType.Factor: format = "\n{0}: {1:F3} GB"; break;

             }

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

             if (sensor.SensorType == SensorType.Temperature &&

               unitManager.TemperatureUnit == TemperatureUnit.Fahrenheit)

             {

                 format = "\n{0}: {1:F1} °F";

                 formattedValue = string.Format(format, sensor.Name,

                   UnitManager.CelsiusToFahrenheit(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;

         }

     }

 }