using System.Text.Encodings.Web;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Text.Unicode;

namespace BookJsonFilesGenerator
{
    internal class Program
    {
        static int Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("Arg 1 needed: directory to bible files.");
                return 1;
            }

            if (!Directory.Exists(args[0]))
            {
                Console.WriteLine("Directory in parameter does not exist.");
            }

            var jsonSettings = new JsonSerializerOptions()
            {
                Encoder = JavaScriptEncoder.Create(UnicodeRanges.All)
            };

            var directory = Directory.GetDirectories(args[0]);
            foreach(var bibleTranslation in directory)
            {
                Console.WriteLine("Handling: " + bibleTranslation);
                var booksDirectory = Path.Combine(bibleTranslation, "books");
                string output;
                if (!Directory.Exists(booksDirectory))
                {
                    output = "[]";
                }
                else
                {
                    var paths = Directory.GetDirectories(booksDirectory);
                    var books = new List<Book>();
                    foreach (var path in paths)
                    {
                        var book = Path.GetFileName(path);
                        var chapterCount = Directory.GetDirectories(Path.Combine(path, "chapters")).Length;
                        books.Add(new Book()
                        {
                            Name = book,
                            Chapters = chapterCount,
                        });
                    }
                    var result = new BibleVersionBooks()
                    {
                        Books = books,
                    };
                    output = JsonSerializer.Serialize(result, jsonSettings);
                }
                var outputPath = Path.Combine(bibleTranslation, "books.json");
                File.WriteAllText(outputPath, output);

                Console.WriteLine("Output written to: " + outputPath);
            }
            
            return 0;
        }
    }

    public class BibleVersionBooks
    {
        [JsonPropertyName("books")]
        public List<Book> Books { get; set; } = default!;
    }

    public class Book
    {
        [JsonPropertyName("name")]
        public string Name { get; set; } = default!;

        [JsonPropertyName("chapters")]
        public int Chapters { get; set; }
    }
}