using System;
using System.Runtime.InteropServices;

/// <summary>
/// Provide some Kernel32 functions for the Console
/// </summary>
class ConsoleMode
{

	// Some constants brought over from WinCon.h

	// constants for console streams
	const int STD_INPUT_HANDLE = -10;
	const int STD_OUTPUT_HANDLE = -11;
	const int STD_ERROR_HANDLE = -12;	
	
	//
	//  Input Mode flags:
	//
	const uint ENABLE_PROCESSED_INPUT =		1;
	const uint ENABLE_LINE_INPUT =			2;
	const uint ENABLE_ECHO_INPUT =			4;
	const uint ENABLE_WINDOW_INPUT =		8;
	const uint ENABLE_MOUSE_INPUT =			10;	

	//
	// Output Mode flags:
	//
	const uint ENABLE_PROCESSED_OUTPUT =	1;
	const uint ENABLE_WRAP_AT_EOL_OUTPUT =	2;

	//
	// DLL imports
	//
	[DllImportAttribute("Kernel32.Dll")]
	private static extern IntPtr GetStdHandle( int nStdHandle );
	[DllImportAttribute("Kernel32.Dll")]
	private static extern bool SetConsoleMode( IntPtr hConsoleHandle, uint dwMode );
	[DllImportAttribute("Kernel32.Dll")]
	private static extern bool GetConsoleMode( IntPtr hConsoleHandle, out uint lpMode );

	private ConsoleMode() { }

	public static void SetSilentMode( bool turnOn )
	{		
		IntPtr nConsole = GetStdHandle( STD_INPUT_HANDLE );		
		uint lpMode, newMode;
		GetConsoleMode( nConsole, out lpMode );

		if (turnOn)
		{
			newMode = lpMode & ~(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT);
		}
		else
		{
			newMode = lpMode & (ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT);
		}	

		if (!SetConsoleMode(nConsole, newMode)) 
		{
			throw new ApplicationException("SetConsoleMode failed");
		}		
	}

	// --------- Colors ------------

	[DllImportAttribute("Kernel32.dll")]
	private static extern bool SetConsoleTextAttribute
		(
		IntPtr hConsoleOutput, // handle to screen buffer
		int wAttributes    // text and background colors
		);

	// colours that can be set
	[Flags] public enum ForeGroundColor
	{
		Black = 0x0000,
		Blue = 0x0001,
		Green = 0x0002, 
		Cyan = 0x0003,
		Red = 0x0004,
		Magenta = 0x0005,
		Yellow = 0x0006,
		Grey = 0x0007,
		White = 0x0008
	}

	public static bool SetForeGroundColor()
	{
		// default to a white-grey
		return SetForeGroundColor(ForeGroundColor.Grey);
	}

	public static bool SetForeGroundColor( ForeGroundColor foreGroundColor)
	{
		// default to a bright white-grey
		return SetForeGroundColor(foreGroundColor, true);
	}

	public static bool SetForeGroundColor(ForeGroundColor foreGroundColor, bool brightColors)
	{
		// get the current console handle
		IntPtr nConsole = GetStdHandle(STD_OUTPUT_HANDLE);
		int colourMap;
            
		// if we want bright colours OR it with white
		if (brightColors)
			colourMap = (int) foreGroundColor | 
				(int) ForeGroundColor.White;
		else
			colourMap = (int) foreGroundColor;

		// call the api and return the result
		return SetConsoleTextAttribute(nConsole, colourMap);
	}
}