/*

  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;

        }

    }

}