/*
    Jurgen Resource Load Manager  Copyright (C) 2014  Adonis S. Deliannis
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 */

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Speech.Synthesis;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Jurgen
{
    class Program
    {
        #region Static Member Definitions
        private static PerformanceCounter _cpuCounter;
        private static PerformanceCounter _memCounter;
        private static PerformanceCounter _sysUptime;
        private static PerformanceCounter _totalDiskIdle;
        private static SpeechSynthesizer synth;

        private static string _warnXPercent = "Warning, Your CPU is over 80 percent! For the love of God, take it easy!";
        private static string _warnLessThanXMB = "Warning, You are running low on Memory! Please, close some programs!";
        private static string _errMsgShow = "I'm sorry, {0} is not a valid switch!";
        private static string _paramOverflow = "Parameter overflow!";
        private static string _notEnoughParams = "Not enough Parameters";
        private static string _help = "For help, type help";
        private static string _cmdHelp = "There's a help command ya know! help";
        private static string _errNoCmd = "{0} is not an available command";

        private static int _cpuThreshold = 80;
        private static int _cpuThresholdMax = 100;
        private static int _memThreshold = 4096;
        private static List<string> cpuMaxedOut;
        private static Random rand = new Random ( );
        #endregion

        #region Constant Values
        public const string AUTHOR = "Adonis S. Deliannis ( Blizzardo1 )";
        public const string APPNAME = "Jurgen Resource Load Manager";
        public const string VERSION = "1.0";
        public const string YEAR = "2014";
        public const string DESCRIPTION = "Jurgen Resource Load Manager displays a few resources to the user";
        public const string DEVELOPMENT_STAGE = "Beta";
        public const string INTRO = "Yurggen Resource Load Manager Version 1 point Oh Beta!";

        // Original width and height of the console
        public const int WIDTH = 80;
        public const int HEIGHT = 25;
        // ------------------------------------------

        public const string BOXNAME = "JurgenBox";
        public const string CONDITIONS = @"As the copyright says, this Software is absolutely Free, and thanks to @Barnacules for uploading the original project
to github, and making a youtube video about it. Therefore, I have no conditions about this software. Thanks again. :), Adonis S. Deliannis ( Blizzardo1 )";
        public const string COPYRIGHT = @"    {0}
    Copyright (C) {1}  {2}

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.";
        #endregion

        /// <summary>
        /// Main Brain of the Vein well... of this entire program, A.K.A. The Entry Point
        /// </summary>
        /// <remarks><see cref="System.String[]"/> args have been removed as this program does not require Arguments</remarks>
        static void Main ( )
        {
            // Declare a new instance of synth
            synth = new SpeechSynthesizer ( );
            cpuMaxedOut = new List<string> ( );

            Console.SetWindowSize ( WIDTH + 42, HEIGHT + 32 );
            
            // Print Program and Copyright Info
            Console.WriteLine ( "{0} {1} - {2}", APPNAME, VERSION, DEVELOPMENT_STAGE );
            Console.WriteLine ( "Made by {0} under the GPLv3", AUTHOR );

            // Have Jurgen speak the Introduction
            JSpeak ( INTRO );

            // Initialise the Performance Counters
            _cpuCounter = new PerformanceCounter ( "Processor Information", "% Processor Time", "_Total" );
            _memCounter = new PerformanceCounter ( "Memory", "Available MBytes" );
            _sysUptime = new PerformanceCounter ( "System", "System Up Time" );
            _totalDiskIdle = new PerformanceCounter ( "PhysicalDisk", "% Idle Time", "_Total" );

            // Add our 5 Messages
            cpuMaxedOut.Add ( "WARNING! YOU ARE NOW AT CRITICAL MASS! PRESS THAT FUCKING BUTTON!" );
            cpuMaxedOut.Add ( "WARNING! STOP CHASING DEM SQUIRRELS!" );
            cpuMaxedOut.Add ( "WARNING! I'M MELTING! I'M MELTING!" );
            cpuMaxedOut.Add ( "WARNING! YOU ARE 1 PERCENT EVIL, 99 PERCENT HOT GAS!" );
            cpuMaxedOut.Add ( "RED ALERT! RED ALERT! RED ALERT! RED ALERT! RED ALERT! RED ALERT! I FARTED OUT A HOT GAS" );

            // Hide the Console Cursor so it doesn't flicker
            Console.CursorVisible = false;

            // Display the contents to the screen
            RenderScreen ( );
        }

        private static void RenderScreen ( )
        {
            // Run forever until someone breaks the system
            while(true)
            {
                // Try looping, if something happens, display a message to the user.
                try
                {
                    do
                    {
                        while ( !Console.KeyAvailable )
                        {
                            // Set up all of our variables to display to the user
                            float cpuLoad = _cpuCounter.NextValue ( );
                            float memLoad = _memCounter.NextValue ( );
                            float sysTime = _sysUptime.NextValue ( );

                            // Neatly display the Up Time to the user ;)
                            string formatted = TimeSpanToFriendly ( TimeSpan.FromSeconds ( sysTime ) );

                            //////////////////////////////////////////////////////////////////////////
                            /* Display the current info we have initialised here                    */
                            Console.WriteLine ( "CPU Load:        {0:0.00}%", cpuLoad );
                            Console.WriteLine ( "Available RAM:   {0}MB - {1:0.00}GB", memLoad, memLoad / 1024 );
                            Console.WriteLine ( "Total Disk Idle: {0:0} %", _totalDiskIdle.NextValue ( ) );
                            // Add some of your own!
                            Console.WriteLine ( "System UpTime:   {0}", formatted );
                            //////////////////////////////////////////////////////////////////////////

                            // If we are getting higher than our threshold, spurt out a message
                            if ( cpuLoad > _cpuThreshold )
                            {
                                // If we are getting higher than our max threshold, spurt out a Critical Error!
                                if ( cpuLoad == _cpuThresholdMax )
                                    JSpeak ( cpuMaxedOut[ rand.Next ( 0, cpuMaxedOut.Count ) ] );
                                else
                                    JSpeak ( _warnXPercent );
                            }

                            // If we are getting lower than our threshold, spurt out a message
                            if ( memLoad < _memThreshold )
                            {
                                JSpeak ( _warnLessThanXMB );
                            }

                            // Wait then clear

                            Thread.Sleep ( 1000 );
                            Console.Clear ( );
                        }
                        // Do the above while we haven't pressed the Escape Key
                    } while ( Console.ReadKey ( true ).Key != ConsoleKey.Escape );

                    // Because we dropped to shell, we need to provide the cursor again
                    Console.CursorVisible = true;
                    while ( true )
                    {
                        // JurgenBox> CommandPrompt
                        Console.Write ( "{0}> ", BOXNAME );
                        string[] msg = Console.ReadLine ( ).Split(' ');

                        // Our list of commands
                        if ( msg[ 0 ].ToLower ( ) == "show" )
                        {
                            // Check to see if we have an equal length of 2
                            // JurgenBox> show c
                            // JurgenBox> show w
                            if ( msg.Length > 2 )
                                Error ( "{0} {1}", _paramOverflow, _help );
                            else if ( msg.Length < 2 )
                                Error ( "Must provide c or w as a parameter" );
                            else
                            {

                                if ( msg[ 1 ].ToLower ( ) == "c" )
                                {
                                    Console.WriteLine ( CONDITIONS );
                                }
                                else if ( msg[ 1 ].ToLower ( ) == "w" )
                                {
                                    Console.WriteLine ( COPYRIGHT, DESCRIPTION, YEAR, AUTHOR );
                                }
                                else
                                {
                                    Error ( _errMsgShow, msg[ 1 ] );
                                }
                            }
                        }
                        // JurgenBox> speak message goes here
                        else if ( msg[ 0 ].ToLower() == "speak" )
                        {
                            int index = 1;
                            string _msg = string.Join ( " ", msg, index, msg.Length - index );
                            JSpeak ( _msg );
                        }
                        // JurgenBox> help
                        else if ( msg[ 0 ].ToLower ( ) == "help" )
                        {
                            Console.WriteLine ( "exit | quit - Will exit the shell but continue to run the program" );
                            Console.WriteLine ( "help        - Displays this help file" );
                            Console.WriteLine ( "show <c|w>  - shows the copyright information" );
                            Console.WriteLine ( "          c - Show Terms and Conditions" );
                            Console.WriteLine ( "          w - Show Copyright" );
                            Console.WriteLine ( "speak <msg> - Jurgen Speaks what you write, so BE CAREFUL WHAT YOU SAY!");
                        }
                        // JurgenBox> exit
                        // JurgenBox> quit
                        else if ( msg[ 0 ].ToLower ( ) == "quit" || msg[ 0 ].ToLower ( ) == "exit" )
                        {
                            // Because we're breaking from shell, hide the Cursor again.
                            Console.CursorVisible = false;
                            break;
                        }
                        // What to do if you don't put anything
                        else if ( string.IsNullOrEmpty ( msg[ 0 ] ) )
                        {
                            Warning ( _cmdHelp );
                        }
                        // What to do when you don't type in a registered command
                        else
                        {
                            Error ( _errNoCmd, msg[0] );
                        }

                    }
                }
                // OH NOEZ! WE GOTZ US A LITTLE EWWOR! FIX IT! FIX IT!
                catch ( Exception ex )
                {
                    Console.WriteLine ( ex.Message );
                }
            }
        }

        /// <summary>
        /// Display an Error message to the User
        /// </summary>
        /// <param name="Message">A Formatted <see cref="System.String"/></param>
        /// <param name="args">An <c>Optional</c> <see cref="System.Object"/> array for the <paramref name="Message"/> </param>
        public static void Error ( string Message, params object[] args )
        {
            ConsoleColor resetColour = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.Red;
            Console.Write ( "[Error] " );
            Console.WriteLine ( Message, args );
            Console.ForegroundColor = resetColour;
        }

        /// <summary>
        /// Display an Informative message to the User
        /// </summary>
        /// <param name="Message">A Formatted <see cref="System.String"/></param>
        /// <param name="args">An <c>Optional</c> <see cref="System.Object"/> array for the <paramref name="Message"/> </param>
        public static void Info ( string Message, params object[] args )
        {
            ConsoleColor resetColour = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.Write ( "[Info] " );
            Console.WriteLine ( Message, args );
            Console.ForegroundColor = resetColour;
        }

        /// <summary>
        /// Display a Warning message to the User
        /// </summary>
        /// <param name="Message">A Formatted <see cref="System.String"/></param>
        /// <param name="args">An <c>Optional</c> <see cref="System.Object"/> array for the <paramref name="Message"/> </param>
        public static void Warning ( string Message, params object[] args )
        {
            ConsoleColor resetColour = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.Write ( "[Warning] " );
            Console.WriteLine ( Message, args );
            Console.ForegroundColor = resetColour;
        }

        /// <summary>
        /// Return a human readable time
        /// </summary>
        /// <param name="ts">The Timespan to translate to a String</param>
        /// <returns>A well translated; Human-Readable string representing the Time</returns>
        public static string TimeSpanToFriendly ( TimeSpan ts )
        {
            return string.Format ( "{0} {1}, {2} {3}, {4} {5}, and {6} {7}",
                ts.Days,
                ts.Days > 1 | ts.Days < 1 ? "days" : "day",
                ts.Hours,
                ts.Hours > 1 | ts.Hours < 1 ? "hours" : "hour",
                ts.Minutes,
                ts.Minutes > 1 | ts.Minutes < 1 ? "minutes" : "minute",
                ts.Seconds,
                ts.Seconds > 1 | ts.Seconds < 1 ? "seconds" : "second"
                );
        }

        /// <summary>
        /// Have Jurgen speak the current message
        /// </summary>
        /// <param name="message">A <see cref="System.String"/> to have the Synth speak</param>
        public static void JSpeak ( string message )
        {
            JSpeak ( message, VoiceGender.Male );
        }

        /// <summary>
        /// Have Jurgen speak the current message with a different Voice
        /// </summary>
        /// <param name="message">A <see cref="System.String"/> to have the Synth speak</param>
        /// <param name="gender"> A <see cref="System.Speech.Synthesis.VoiceGender"/> to change the voice of the Synth</param>
        public static void JSpeak ( string message, VoiceGender gender )
        {
            JSpeak ( message, gender, 1 );
        }

        /// <summary>
        /// Have Jurgen speak the current message with a different Voice and rate
        /// </summary>
        /// <param name="message">A <see cref="System.String"/> to have the Synth speak</param>
        /// <param name="gender"> A <see cref="System.Speech.Synthesis.VoiceGender"/> to change the voice of the Synth</param>
        /// <param name="rate">An <see cref="System.Int32"/> to change the rate of how fast the Synth speaks</param>
        public static void JSpeak ( string message, VoiceGender gender, int rate )
        {
            synth.Rate = rate;
            synth.SelectVoiceByHints ( gender );
            synth.Speak ( message );
        }
    }
}