// ****************************************************************

// Copyright 2008, Charlie Poole

// This is free software licensed under the NUnit license. You may

// obtain a copy of the license at http://nunit.org.

// ****************************************************************



using System;

using System.IO;

using System.Reflection;

using System.Configuration;

using System.Collections.Specialized;

using System.Threading;

using Microsoft.Win32;



namespace NUnit.Core

{

    /// <summary>

    /// Provides static methods for accessing the NUnit config

    /// file 

    /// </summary>

    public class NUnitConfiguration

    {

        #region Class Constructor

        /// <summary>

        /// Class constructor initializes fields from config file

        /// </summary>

        static NUnitConfiguration()

        {

            try

            {

                NameValueCollection settings = GetConfigSection("NUnit/TestCaseBuilder");

                if (settings != null)

                {

                    string oldStyle = settings["OldStyleTestCases"];

                    if (oldStyle != null)

                            allowOldStyleTests = Boolean.Parse(oldStyle);

                }



                settings = GetConfigSection("NUnit/TestRunner");

                if (settings != null)

                {

                    string apartment = settings["ApartmentState"];

                    if (apartment != null)

                        apartmentState = (ApartmentState)

                            System.Enum.Parse(typeof(ApartmentState), apartment, true);



                    string priority = settings["ThreadPriority"];

                    if (priority != null)

                        threadPriority = (ThreadPriority)

                            System.Enum.Parse(typeof(ThreadPriority), priority, true);

                }

            }

            catch (Exception ex)

            {

                string msg = string.Format("Invalid configuration setting in {0}",

                    AppDomain.CurrentDomain.SetupInformation.ConfigurationFile);

                throw new ApplicationException(msg, ex);

            }

        }



        private static NameValueCollection GetConfigSection( string name )

        {

#if NET_2_0

            return (NameValueCollection)System.Configuration.ConfigurationManager.GetSection(name);

#else

			return (NameValueCollection)System.Configuration.ConfigurationSettings.GetConfig(name);

#endif

        }

        #endregion



        #region Public Properties



        #region AllowOldStyleTests

        private static bool allowOldStyleTests = false;

        public static bool AllowOldStyleTests

        {

            get { return allowOldStyleTests; }

        }

        #endregion



        #region ThreadPriority

        private static ThreadPriority threadPriority = ThreadPriority.Normal;

        public static ThreadPriority ThreadPriority

        {

            get { return threadPriority; }

        }

        #endregion



        #region ApartmentState

        private static ApartmentState apartmentState = ApartmentState.Unknown;

        public static ApartmentState ApartmentState

        {

            get { return apartmentState; }

            //set { apartmentState = value; }

        }

        #endregion



        #region BuildConfiguration

        public static string BuildConfiguration

        {

            get

            {

#if DEBUG

                    return "Debug";

#else

					return "Release";

#endif

            }

        }

        #endregion



        #region NUnitLibDirectory

        private static string nunitLibDirectory;

        /// <summary>

        /// Gets the path to the lib directory for the version and build

        /// of NUnit currently executing.

        /// </summary>

        public static string NUnitLibDirectory

        {

            get

            {

                if (nunitLibDirectory == null)

                {

                    nunitLibDirectory =

                        AssemblyHelper.GetDirectoryName(Assembly.GetExecutingAssembly());

                }



                return nunitLibDirectory;

            }

        }

        #endregion



        #region NUnitBinDirectory

        private static string nunitBinDirectory;

        public static string NUnitBinDirectory

        {

            get

            {

                if (nunitBinDirectory == null)

                {

                    nunitBinDirectory = NUnitLibDirectory;

                    if (Path.GetFileName(nunitBinDirectory).ToLower() == "lib")

                        nunitBinDirectory = Path.GetDirectoryName(nunitBinDirectory);

                }



                return nunitBinDirectory;

            }

        }

        #endregion



        #region AddinDirectory

        private static string addinDirectory;

        public static string AddinDirectory

        {

            get

            {

                if (addinDirectory == null)

                {

                    addinDirectory = Path.Combine(NUnitBinDirectory, "addins");

                }



                return addinDirectory;

            }

        }

        #endregion



        #region TestAgentExePath

        //private static string testAgentExePath;

        //private static string TestAgentExePath

        //{

        //    get

        //    {

        //        if (testAgentExePath == null)

        //            testAgentExePath = Path.Combine(NUnitBinDirectory, "nunit-agent.exe");



        //        return testAgentExePath;

        //    }

        //}

        #endregion



        #region MonoExePath

        private static string monoExePath;

        public static string MonoExePath

        {

            get

            {

                if (monoExePath == null)

                {

                    string[] searchNames = IsWindows()

                        ? new string[] { "mono.bat", "mono.cmd", "mono.exe" }

                        : new string[] { "mono", "mono.exe" };

                    

                    monoExePath = FindOneOnPath(searchNames);



                    if (monoExePath == null && IsWindows())

                    {

                        RegistryKey key = Registry.LocalMachine.OpenSubKey(@"Software\Novell\Mono");

                        if (key != null)

                        {

                            string version = key.GetValue("DefaultCLR") as string;

                            if (version != null)

                            {

                                key = key.OpenSubKey(version);

                                if (key != null)

                                {

                                    string installDir = key.GetValue("SdkInstallRoot") as string;

                                    if (installDir != null)

                                        monoExePath = Path.Combine(installDir, @"bin\mono.exe");

                                }

                            }

                        }

                    }



                    if (monoExePath == null)

                        return "mono";

                }



                return monoExePath;

            }

        }



        private static string FindOneOnPath(string[] names)

        {

            //foreach (string dir in Environment.GetEnvironmentVariable("path").Split(new char[] { Path.PathSeparator }))

            //    foreach (string name in names)

            //    {

            //        string fullPath = Path.Combine(dir, name);

            //        if (File.Exists(fullPath))

            //            return name;

            //    }



            return null;

        }



        private static bool IsWindows()

        {

            return Environment.OSVersion.Platform == PlatformID.Win32NT;

        }

        #endregion



        #region ApplicationDataDirectory

        private static string applicationDirectory;

        public static string ApplicationDirectory

        {

            get

            {

                if (applicationDirectory == null)

                {

                    applicationDirectory = Path.Combine(

                        Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),

                        "NUnit");

                }



                return applicationDirectory;

            }

        }

        #endregion



        #region HelpUrl

        public static string HelpUrl

        {

            get

            {

#if NET_2_0

                string helpUrl = ConfigurationManager.AppSettings["helpUrl"];

#else

                string helpUrl = ConfigurationSettings.AppSettings["helpUrl"];

#endif



                if (helpUrl == null)

                {

                    helpUrl = "http://nunit.org";

                    string dir = Path.GetDirectoryName(NUnitBinDirectory);

                    if ( dir != null )

                    {

                        dir = Path.GetDirectoryName(dir);

                        if ( dir != null )

                        {

                            string localPath = Path.Combine(dir, @"doc/index.html");

                            if (File.Exists(localPath))

                            {

                                UriBuilder uri = new UriBuilder();

                                uri.Scheme = "file";

                                uri.Host = "localhost";

                                uri.Path = localPath;

                                helpUrl = uri.ToString();

                            }

                        }

                    }

                }



                return helpUrl;

            }

        }

        #endregion



        #endregion



        #region Public Methods



        /// <summary>

        /// Return the NUnit Bin Directory for a particular

        /// runtime version, or null if it's not installed.

        /// For normal installations, there are only 1.1 and

        /// 2.0 directories. However, this method accomodates

        /// 3.5 and 4.0 directories for the benefit of NUnit

        /// developers using those runtimes.

        /// </summary>

        public static string GetNUnitBinDirectory(Version v)

        {

            string dir = NUnitBinDirectory;



            if ((Environment.Version.Major >= 2) == (v.Major >= 2))

                return dir;



            string[] v1Strings = new string[] { "1.0", "1.1" };

            string[] v2Strings = new string[] { "2.0", "3.0", "3.5", "4.0" };

            

            string[] search;

            string[] replace;



            if (Environment.Version.Major == 1)

            {

                search = v1Strings;

                replace = v2Strings;

            }

            else

            {

                search = v2Strings;

                replace = v1Strings;

            }



            // Look for current value in path so it can be replaced

            string current = null;

            foreach (string s in search)

                if (dir.IndexOf(s) >= 0)

                {

                    current = s;

                    break;

                }



            // If nothing found, we can't do it

            if (current == null)

                return null;



            // First try exact replacement

            string altDir = dir.Replace(current, v.ToString(2));

            if (Directory.Exists(altDir))

                return altDir;



            // Now try all the alternatives

            foreach (string target in replace)

            {

                altDir = dir.Replace(current, target);

                if (Directory.Exists(altDir))

                    return altDir;

            }



            // Nothing was found

            return null;

        }



        public static string GetTestAgentExePath(Version v)

        {

            string binDir = GetNUnitBinDirectory(v);

            if ( binDir == null ) return null;



#if NET_2_0

            Assembly a = System.Reflection.Assembly.GetEntryAssembly();

            string agentName = v.Major > 1 && a != null && a.GetName().ProcessorArchitecture == ProcessorArchitecture.X86

                ? "nunit-agent-x86.exe" 

                : "nunit-agent.exe";

#else

            string agentName = "nunit-agent.exe";

#endif



            string agentExePath = Path.Combine(binDir, agentName);

            return File.Exists(agentExePath) ? agentExePath : null;

        }



        #endregion

    }

}