using System;

using Lifti;

using System.Threading.Tasks;

using System.Linq;

​

public class Book

{

  public int BookId { get; set; }

  public string Title { get; set; }

  public string[] Authors { get; set; }

  public string Synopsis { get; set; } 

}

​

public class Program

{

    public async static Task Main()

    {

        var bookIndex = new FullTextIndexBuilder<int>()

          // Configure the index to work with Book objects

          .WithObjectTokenization<Book>(

            options => options

              // Specifies the BookId property as the key for each document in the index.

              .WithKey(b => b.BookId)

              // Define a field named "Title"

              .WithField("Title", b => b.Title)

              // Define a field for "Authors" (arrays of strings are treated as a single body of text)

              .WithField("Authors", b => b.Authors)

              // Define a field for "Synopsis"

              .WithField("Synopsis", b => b.Synopsis))

          .Build();

        //An array of Book objects is created

        var books = new[]

        {

            new Book

            {

                BookId = 1,

                Title = "The Three Body Problem",

                Authors = new[] { "Liu Cixin" },

                Synopsis = "The Three-Body Problem (Chinese: 三体; literally: 'Three-Body'; pinyin: sān tǐ) is a hard science fiction novel..."

            },

            new Book

            {

                BookId = 2,

                Title = "Dragons of Autumn Twilight",

                Authors = new[] { "Margaret Weis", "Tracy Hickman" },

                Synopsis = "Dragons of Autumn Twilight is a 1984 fantasy novel by American writers Margaret Weis and Tracy Hickman..."

            },

            // ... other books

        };

        await bookIndex.AddRangeAsync(books);

        // Search for "novel" across all indexed fields (Title, Authors, Synopsis)

        var results = bookIndex.Search("novel");

        // Prints:

        // Matched documents: 2, 1

        // with respective scores: 0.1844777907113601, 0.18021514599659186

        Console.WriteLine($"Matched documents: {String.Join(", ", results.Select(i => i.Key))}");

        Console.WriteLine($"with respective scores: {string.Join(", ", results.Select(i => i.Score))}");

​

        // Search for "the" specifically in the Title field

        results = bookIndex.Search("title=the");

        // Prints: "Matched documents: 1"

        Console.WriteLine("Matched documents: " + string.Join(", ", results.Select(i => i.Key)));

    }

}