// -*- csharp -*-
// LuceneDemo.cs - a simple demo app for Lucene.NET
//
// Copyright 2004, Silverback Software, LLC
//
// Permission to use, copy, modify, and distribute this software and
// its documentation for any purpose, without fee, and without a
// written agreement is hereby granted, provided that the above
// copyright notice and this paragraph and the following two
// paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
// INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
// LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
// NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER
// IS ON AN "AS IS" BASIS, AND THE AUTHOR HAS NO OBLIGATIONS TO
// PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
// MODIFICATIONS.
//
// Compile this with:
//
// csc /target:exe /reference:Lucene.Net.dll LuceneDemo.cs
//

using System;
using System.IO;

using Lucene.Net.Analysis;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Documents; // NOTE: namespace doesn't match class
using Lucene.Net.Index;
using Lucene.Net.QueryParsers; // NOTE: namespace doesn't match class
using Lucene.Net.Search;

namespace SilverbackSoftware.LuceneDemo
{
    /// <summary>LuceneDemo</summary>
    public class LuceneDemo
    {
        public static bool Building = false;

        /// <summary>Main</summary>
        public static void Main(string[] args)
        {
            string usage = "usage: LuceneDemo [index filename]|" +
                "[search query]";

            if(args.Length != 2)
            {
                Console.WriteLine(usage);
                return;
            }

            switch(args[0])
            {
            case "index":
                IndexWriter indexWriter = new IndexWriter(
                    "./index.lcn", new StopAnalyzer(), true);

                indexWriter.AddDocument(
                    FileDocument.Document(
                        new FileInfo(args[1])));

                indexWriter.Optimize();
                indexWriter.Close();
                break;

            case "search":
                Searcher searcher = new IndexSearcher("index.lcn");
                Analyzer analyzer = new StandardAnalyzer();

                Query query = QueryParser.Parse(args[1], "contents",
                                                analyzer);
                Hits hits = searcher.Search(query);

                Console.WriteLine("{0} hits", hits.Length());
                if(hits.Length() > 0)
                {
                    Console.WriteLine("{0}", hits.Doc(0).Get("path"));
                }
                break;

            default:
                Console.WriteLine(usage);
                return;
            }
        }
    }

    public class FileDocument
    {
        /// <summary></summary>
        public static Document Document(FileInfo f)
        {
            Document doc = new Document();

            doc.Add(Field.Text("path", f.FullName));

            doc.Add(Field.Keyword(
                        "modified",
                        DateField.DateToString(f.LastWriteTime)));

            doc.Add(Field.Text("contents",
                               new StreamReader(f.FullName)));

            return doc;
        }

        private FileDocument()
        {
        }
    }
}