/********************************************************************++
Copyright (c) Microsoft Corporation.  All rights reserved.
--********************************************************************/

using System.Management.Automation;
using System.Management.Automation.Runspaces;

namespace Microsoft.PowerShell
{
    /// <summary>
    /// This class provides an entry point which is called by minishell's main
    /// to transfer control to Msh console host implementation.
    /// </summary>

    public static
    class ConsoleShell
    {
#if CORECLR
        /// <summary>Entry point in to ConsoleShell. This method is called by main of minishell.</summary>
        /// <param name="bannerText">Banner text to be displayed by ConsoleHost</param>
        /// <param name="helpText">Help text for minishell. This is displayed on 'minishell -?'.</param>
        /// <param name="args">Commandline parameters specified by user.</param>
        /// <returns>An integer value which should be used as exit code for the process.</returns>
        public static int Start(string bannerText, string helpText, string[] args)
        {
            return Start(null, bannerText, helpText, null, args);
        }
#else
        /// <summary>Entry point in to ConsoleShell. This method is called by main of minishell.</summary>
        /// <param name="configuration">Configuration information which is used to create Runspace.</param>
        /// <param name="bannerText">Banner text to be displayed by ConsoleHost</param>
        /// <param name="helpText">Help text for minishell. This is displayed on 'minishell -?'.</param>
        /// <param name="args">Commandline parameters specified by user.</param>
        /// <returns>An integer value which should be used as exit code for the process.</returns>
        public static int Start(RunspaceConfiguration configuration, string bannerText, string helpText, string[] args)
        {
            return Start(configuration, bannerText, helpText, null, args);
        }
#endif

        /// <summary>
        ///
        /// Entry point in to ConsoleShell. This method is called from the native or managed exe host application
        ///
        /// </summary>
        /// <param name="configuration">
        /// Configuration information which is used to create Runspace.
        /// </param>
        ///
        /// <param name="bannerText">
        /// Banner text to be displayed by ConsoleHost
        /// </param>
        ///
        /// <param name="helpText">
        /// Help text for minishell. This is displayed on 'minishell -?'.
        /// </param>
        ///
        /// <param name="preStartWarning">
        /// Warning occurred prior to this point, for example, a snap-in fails to load beforehand.
        /// This string will be printed out.
        /// </param>
        ///
        /// <param name="args">
        /// Commandline parameters specified by user.
        /// </param>
        ///
        /// <returns>
        /// An integer value which should be used as exit code for the
        /// process.
        /// </returns>

        internal static
        int
        Start(RunspaceConfiguration configuration,
              string bannerText,
              string helpText,
              string preStartWarning,
              string[] args)
        {
            if (args == null)
            {
                throw PSTraceSource.NewArgumentNullException("args");
            }

            return ConsoleHost.Start(configuration, bannerText, helpText, preStartWarning, args);
        }
    }
}