using System;
using System.Collections.Generic;
using System.IO;
using JD.Kernel.Classes;
using JD.LogService;
using JD.TeaBoxAddinSystem.Bootstrap;

namespace JD.TeaBoxAddinSystem.Addins.Management
{
    /// <summary>
    /// Generates an addin xml schema
    /// </summary>
    internal class GenerateAddinXmlSchemaCommand : AbstractCommandLineHandler
    {
        #region Constants

        private const string GenerateAddinXmlSchemaSwitchName = "generate_addin_xml_schema";

        #endregion

        #region Methods

        public override IEnumerable<string> ArgumentNames
        {
            get 
            {
                yield return GenerateAddinXmlSchemaSwitchName;
            }
        }

        public override string ShortHelpDescription
        {
            get { return "Generates an addin xml schema."; }
        }

        protected override void ExecuteImpl()
        {
            if (Runtime.Arguments.Parameters.Count == 0)
            {
                Console.Out.WriteLine("Must specify a schema file.");
                return;
            }

            string filename = Runtime.Arguments.Parameters[0];

            filename = Path.GetFullPath(filename);

            LoggingContext loggingContext = new LoggingContext();

            loggingContext.ErrorAdded += delegate(object sender, ItemEventArgs<Error> e)
            {
                Console.Out.WriteLine(e.Item.ToCanonicalString());
            };

            loggingContext.WarningAdded += delegate(object sender, ItemEventArgs<Error> e) 
            { 
                Console.Out.WriteLine(e.Item.ToCanonicalString()); 
            };

            loggingContext.MessageAdded += delegate(object sender, ItemEventArgs<Message> e)
            {
                Console.Out.WriteLine(e.Item.Message);
            };

            foreach (LogEvent @event in ApplicationStartup.Instance.BootstrapLoggingContext.FullLog)
            {
                loggingContext.Log(@event);
            }

            try
            {
                AddinXmlSchemaGenerator generator = new AddinXmlSchemaGenerator(Runtime.AddinRepository, loggingContext);
                generator.GenerateAndSaveTo(filename);
            }
            catch (Exception e)
            {
                Console.Out.WriteLine("Unexpected error while generating schema: {0}", e.Message);
                return;
            }

            Console.Out.WriteLine("Generated addin schema in {0}.", filename);
        }

        #endregion
    }
}