// Copyright (c) 2007 Omer Rauchwerger (a.k.a rauchy) (omer@rauchy.net)
// All rights reserved.
//
// This file is part of Regionerate.
// 
// 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/>.

using System;
using System.Reflection;
using Rauchy.Regionerate.Shared.Components;

namespace Rauchy.Regionerate.Presentation.Console
{
    /// <summary>
    /// Provides user interface services for the console application.
    /// </summary>
    internal class UserInterface
    {


        #region Fields (3)

        private static int _criticalWarnings;
        private static int _lineCounter;
        private static int _nonCriticalWarnings;

        #endregion

        #region Methods (7)

        private static void CountWarning( string text, Output.WarningLevel level )
        {
            switch ( level )
            {
                case Output.WarningLevel.NonCritical:
                    _nonCriticalWarnings++;
                    break;
                case Output.WarningLevel.Critical:
                    _criticalWarnings++;
                    break;
            }
        }

        private static void DisplayWarning( string text, Output.WarningLevel level )
        {
            System.Console.WriteLine( "[#{0}] ({1}) {2} warning: {3}.", ++_lineCounter, DateTime.Now.ToLongTimeString(),
                                      level, text );
        }

        /// <summary>
        /// Prompts the user about the accepted arguments and attaches to the output accordingly.
        /// </summary>
        /// <param name="arguments">The arguments.</param>
        public static void Load( Arguments arguments )
        {
            System.Console.Write( "Target file: {0}, ", arguments.TargetFile );
            System.Console.Write( "Type: {0}, ", arguments.TargetType );
            System.Console.WriteLine( "Code Layout: {0}.",
                                      arguments.UseDefaultCodeLayout ? "Default" : arguments.CustomCodeLayoutPath );

            if ( arguments.NoInfo )
            {
                System.Console.WriteLine( "Information prompting disabled." );
            }
            else
            {
                Output.OnInformationSubmitted += Output_OnInformationSubmitted;
            }

            if ( arguments.NoWarn )
            {
                System.Console.WriteLine( "Warning prompting disabled." );
            }
            else
            {
                Output.OnWarningSubmitted += DisplayWarning;
            }

            // Register to the OnWarningSubmitted anyway, even if the user does not want 
            // to receive warnings, in order to count them.
            Output.OnWarningSubmitted += CountWarning;

            System.Console.WriteLine();
        }

        private static void Output_OnInformationSubmitted( string text )
        {
            System.Console.WriteLine( "[#{0}] ({1}) Information: {2}.", ++_lineCounter, DateTime.Now.ToLongTimeString(),
                                      text );
        }

        public static void ShowFooter()
        {
            string header =
                string.Format( "\nOperation completed with {0} critical warnings and {1} non-critical warnings.\n",
                               _criticalWarnings, _nonCriticalWarnings );

            System.Console.WriteLine( Environment.NewLine );

            for ( int i = 0; i < header.Length; i++ )
            {
                System.Console.Write( "=" );
            }

            System.Console.WriteLine( Environment.NewLine );

            System.Console.WriteLine( header );
        }

        /// <summary>
        /// Shows the header.
        /// </summary>
        public static void ShowHeader()
        {
            string header =
                string.Format( "\nRegionerate command line utility v{0} by Omer Rauchwerger (omer@rauchy.net)",
                               Assembly.GetExecutingAssembly().GetName( false ).Version );
            System.Console.WriteLine( header );

            for ( int i = 0; i < header.Length; i++ )
            {
                System.Console.Write( "=" );
            }

            System.Console.WriteLine( Environment.NewLine );
        }

        /// <summary>
        /// Shows the syntax.
        /// </summary>
        public static void ShowSyntax()
        {
            System.Console.WriteLine( "Required syntax:\n" );

            System.Console.WriteLine(
                "In order to run the command line utility, you must specify your target by using the -target argument as follows:" );
            System.Console.WriteLine( "rgn -target:Calculator.csproj" );
            System.Console.WriteLine( "The target can be a code file, project file or solution file.\n" );
            System.Console.WriteLine(
                "Besides the -target argument, you can also specify which Code Layout you want to use using the -layout argument as follows:" );
            System.Console.WriteLine( "rgn -target:Calculator.csproj -layout:My Special Layout.xml" );
            System.Console.WriteLine( "If you won't use the -layout argument, the default Code Layout will be used.\n" );
            System.Console.WriteLine(
                "If you are running on projects or solutions, you may wish to ignore certain files or projects inside them." );
            System.Console.WriteLine( "To do so, use the -ignoreFiles and -ignoreProjects arguments as follows:" );
            System.Console.WriteLine(
                "rgn -target:Calculator.csproj -ignoreFiles:\"AssemblyInfo.cs|MainForm.cs|MainWindow.cs\"" );
            System.Console.WriteLine( "rgn -target:MathLib.sln -ignoreProjects:\"Calculator.csproj|Graphs.csproj\"" );
            System.Console.WriteLine( "Ignored values should be separated by the '|' delimiter." );
            System.Console.WriteLine( "Ignored values will be searched as part of the file/project name, so:" );
            System.Console.WriteLine( "rgn -target:Calculator.csproj -ignoreFiles:\"Main\"" );
            System.Console.WriteLine(
                "Will ignore all files that contain the word \"Main\" in their name, e.g: \"MainForm.cs\" and \"MainWindow.cs\"\n" );
            System.Console.WriteLine(
                "You can disable information prompts by using the -noinfo argument and disable warning prompts by using the -nowarn argument, for example:" );
            System.Console.WriteLine( "rgn -target:Calculator.csproj -noinfo -nowarn" );
            System.Console.WriteLine(
                "This will Regionerate the Calculator project in silent mode, only fatal exceptions will be brought to your attentions." );
        }

        #endregion
    }
}