using System;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BrotliTest
{
    class Program
    {
        static async Task Main(string[] args)
        {
            const int NUMBER_OF_LINES = 10000;
            const string SAMPLE_STRING = "hello this should compress well\n";

            var inputString = string.Concat(Enumerable.Repeat(SAMPLE_STRING, NUMBER_OF_LINES));
            var inputBytes = Encoding.UTF8.GetBytes(inputString);
            Console.WriteLine($"Input size: {inputBytes.Length} bytes");

            using (var outputMemory = new MemoryStream())
            using (var outputStream = new BrotliStream(outputMemory, CompressionLevel.Fastest))
            {
                await outputStream.WriteAsync(inputBytes);
                Console.WriteLine($"Output size (all at once): {outputMemory.Length} bytes");
            }

            using (var outputMemory = new MemoryStream())
            using (var outputStream = new BrotliStream(outputMemory, CompressionLevel.Fastest))
            {
                var bytes = Encoding.UTF8.GetBytes(SAMPLE_STRING);
                for (var i = 0; i < NUMBER_OF_LINES; i++)
                {
                    await outputStream.WriteAsync(bytes);
                }
                Console.WriteLine($"Output size (line by line): {outputMemory.Length} bytes");
            }

            using (var outputMemory = new MemoryStream())
            using (var outputStream = new BrotliStream(outputMemory, CompressionLevel.Fastest))
            {
                foreach (var inputByte in inputBytes)
                {
                    await outputStream.WriteAsync(new[] { inputByte });
                }

                Console.WriteLine($"Output size (byte by byte): {outputMemory.Length} bytes");
            }

            Console.ReadKey();
        }
    }
}