using System;
using System.Collections.Generic;
using System.IO;


namespace RobvanderWoude
{
	class EnergyLoggerConfig
	{
		static string progver = "1.00";
		static int minutesinfuture = 1;
		static int deviceID = 1;
		static double daytimetariff = 0.076;
		static double nighttimetariff = 0.051;
		static Currency currency = Currency.Euro;
		static DateFormat dateformat = DateFormat.DateDmy;
		static TimeFormat timeformat = TimeFormat.Clock24Hour;


		static int Main( string[] args )
		{
			if ( args.Length < 2 || args.Length > 7 )
			{
				return ShowHelp( );
			}

			try
			{
				foreach ( string arg in args )
				{
					string key, val;
					if ( arg.IndexOf( ':' ) == -1 )
					{
						key = arg.ToLower( );
						val = null;
					}
					else
					{
						key = arg.Substring( 0, arg.IndexOf( ':' ) ).ToLower( );
						val = arg.Substring( arg.IndexOf( ':' ) + 1 ).ToLower( );
					}
					switch ( key )
					{
						case "/12h":
							timeformat = TimeFormat.Clock12Hour;
							break;
						case "/c":
							switch ( val[0] )
							{
								case 'd':
								case 'u':
								case '$':
									currency = Currency.USDollar;
									break;
								case 'e':
									currency = Currency.Euro;
									break;
								case 'f':
								case 's':
									currency = Currency.SwissFrank;
									break;
								case 'g':
								case 'p':
									currency = Currency.GBPound;
									break;
								default:
									return ShowHelp( );
							}
							break;
						case "/dt":
							daytimetariff = Convert.ToDouble( val );
							break;
						case "/f":
							minutesinfuture = Convert.ToInt32( val );
							break;
						case "/id":
							deviceID = Convert.ToInt32( val );
							break;
						case "/mdy":
							dateformat = DateFormat.DateMdy;
							break;
						case "/nt":
							nighttimetariff = Convert.ToDouble( val );
							break;
						default:
							return ShowHelp( );
					}
				}
			}
			catch ( Exception )
			{
				return ShowHelp( );
			}

			if ( daytimetariff <= 0 || daytimetariff >= 10 )
			{
				return ShowHelp( );
			}

			if ( nighttimetariff <= 0 || nighttimetariff >= 10 )
			{
				return ShowHelp( );
			}

			if ( deviceID < 0 || deviceID > 9 )
			{
				return ShowHelp( );
			}

			if ( minutesinfuture < 0 || minutesinfuture > 60 )
			{
				return ShowHelp( );
			}

			// Minute(s) to write the file to SD card and then load the SD card into the Energy Logger 3500
			DateTime soon = DateTime.Now.AddMinutes( minutesinfuture );

			byte[] bindata = new byte[] { 
				0xB8,
				0xAD,
				0xF2, // fixed 3 bytes header
				Convert.ToByte( deviceID),
				Convert.ToByte( timeformat ),
				Convert.ToByte( dateformat ),
				Convert.ToByte( soon.Hour ),
				Convert.ToByte( soon.Minute ),
				Convert.ToByte( soon.Month ),
				Convert.ToByte( soon.Day ),
				Convert.ToByte( soon.Year % 100 ), // 2-digit year (without the century)
				Convert.ToByte( currency ),
				Convert.ToByte( Convert.ToInt32( nighttimetariff ) ),
				Convert.ToByte( Convert.ToInt32( nighttimetariff * 10 ) % 10 ),
				Convert.ToByte( Convert.ToInt32( nighttimetariff * 100 ) % 100 ),
				Convert.ToByte( Convert.ToInt32( nighttimetariff * 1000 ) % 1000 ),
				Convert.ToByte( Convert.ToInt32( daytimetariff ) ),
				Convert.ToByte( Convert.ToInt32( daytimetariff * 10 ) % 10 ),
				Convert.ToByte( Convert.ToInt32( daytimetariff * 100 ) % 100 ),
				Convert.ToByte( Convert.ToInt32( daytimetariff * 1000 ) % 1000 )
			};

			// Create the binary file
			using ( BinaryWriter binfile = new BinaryWriter( File.Open( Path.Combine( Directory.GetCurrentDirectory( ), "setupel3.bin" ), FileMode.Create ) ) )
			{
				binfile.Write( bindata );
			}

			return 0;
		}


		static void ReadConfig( )
		{
		}


		static int ShowHelp( params string[] errmsg )
		{
			/*
			EnergyLoggerConfig.exe,  Version 1.00
			Create a binary configuration file for the VoltCraft Energy Logger 3500 or 4000
			
			Usage:    EnergyLoggerConfig /dt:daytimetariff /nt:nighttimetariff [ options ]
			
			Where:    daytimetariff      is the day time tariff for 1 kWh
			          nighttimetariff    is the night time tariff for 1 kWh
			
			Options:  /ID:deviceID       set device ID (0..9; default: 1)
			          /12H               use 12 hour clock (default: 24 hour clock)
			          /MDY               use date format M/D/Y (default: D-M-Y)
			          /F:minutes         set time to specified number of minutes in future
			                             to allow sufficient time to load the SD card into
			                             the device (0..60; default: 1 minute)
			          /C:currency        set currency: G = GB Pound, S = Swiss Frank,
			                             U = US Dollar, E = Euro (default: Euro)

			The settings will be written to a binary file named "setupel3.bin", located in
			the current directory. It should be written to SD card and loaded into the
			device in the specified number of minutes (/F switch) for optimal accuracy of
			cost calculations. Once loaded, the device will erase the file from the SD card.
			Detailed information on the setupel3.bin file format can be found at
			http://wiki.td-er.nl/index.php?title=Energy_Logger_3500
			
			Written by Rob van der Woude
			http://www.robvanderwoude.com
			*/

			if ( errmsg.Length > 0 )
			{
				List<string> errargs = new List<string>( errmsg );
				errargs.RemoveAt( 0 );
				Console.Error.WriteLine( );
				Console.ForegroundColor = ConsoleColor.Red;
				Console.Error.Write( "ERROR:\t" );
				Console.ForegroundColor = ConsoleColor.White;
				Console.Error.WriteLine( errmsg[0], errargs.ToArray( ) );
				Console.ResetColor( );
			}

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "EnergyLoggerConfig.exe,  Version {0}", progver );

			Console.Error.WriteLine( "Create a binary configuration file for the VoltCraft Energy Logger 3500 or 4000" );

			Console.Error.WriteLine( );

			Console.Error.Write( "Usage:    " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.WriteLine( "EnergyLoggerConfig /dt:daytimetariff /nt:nighttimetariff [ options ]" );
			Console.ResetColor( );

			Console.Error.WriteLine( );

			Console.Error.Write( "Where:    " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "daytimetariff" );
			Console.ResetColor( );
			Console.Error.WriteLine( "      is the day time tariff for 1 kWh" );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          nighttimetariff" );
			Console.ResetColor( );
			Console.Error.WriteLine( "    is the night time tariff for 1 kWh" );

			Console.Error.WriteLine( );

			Console.Error.Write( "Options:  " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "/ID:deviceID" );
			Console.ResetColor( );
			Console.Error.WriteLine( "       set device ID (0..9; default: 1)" );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          /12H" );
			Console.ResetColor( );
			Console.Error.WriteLine( "               use 12 hour clock (default: 24 hour clock)" );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          /MDY" );
			Console.ResetColor( );
			Console.Error.WriteLine( "               use date format M/D/Y (default: D-M-Y)" );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          /F:minutes" );
			Console.ResetColor( );
			Console.Error.WriteLine( "         set time to specified number of minutes in future" );

			Console.Error.WriteLine( "                             to allow sufficient time to load the SD card into" );

			Console.Error.WriteLine( "                             the device (0..60; default: 1 minute)" );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          /C:currency" );
			Console.ResetColor( );
			Console.Error.Write( "        set currency: " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "G" );
			Console.ResetColor( );
			Console.Error.Write( " = GB Pound, " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "S" );
			Console.ResetColor( );
			Console.Error.WriteLine( " = Swiss Frank," );

			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "                             U" );
			Console.ResetColor( );
			Console.Error.Write( " = US Dollar, " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "E" );
			Console.ResetColor( );
			Console.Error.WriteLine( " = Euro (default: Euro)" );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "The settings will be written to a binary file named \"setupel3.bin\", located in" );

			Console.Error.WriteLine( "the current directory. It should be written to SD card and loaded into the" );

			Console.Error.WriteLine( "device in the specified number of minutes (/F switch) for optimal accuracy of" );

			Console.Error.WriteLine( "cost calculations. Once loaded, the device will erase the file from the SD card." );

			Console.Error.WriteLine( "Detailed information on the setupel3.bin file format can be found at" );

			Console.ForegroundColor = ConsoleColor.DarkGray;
			Console.Error.WriteLine( "http://wiki.td-er.nl/index.php?title=Energy_Logger_3500" );
			Console.ResetColor( );

			Console.Error.WriteLine( );

			Console.Error.WriteLine( "Written by Rob van der Woude" );

			Console.Error.WriteLine( "http://www.robvanderwoude.com" );

			return 1;
		}
	}


	public enum Currency
	{
		GBPound = 1,
		SwissFrank = 2,
		USDollar = 4,
		Euro = 8
	}


	public enum DateFormat
	{
		DateMdy = 1,
		DateDmy = 2
	}


	public enum TimeFormat
	{
		Clock12Hour = 1,
		Clock24Hour = 2
	}
}