using System;
using System.Collections;
using System.IO;

namespace rshw2sst
{
    public class Program
    {

        public static void Main(string[] args)
        {
            Console.WriteLine("mitzifier RSHW converter");
            if (args[0] == "help")
            {
                Console.WriteLine("Usage: mitzifier <file path> <output directory>\n"
                    + "This will output a SST showtape for use with the Mitzi/Helen firmware and player only\n"
                );
            }
            if (!File.Exists(args[0]))
            {
                Console.WriteLine("FATAL: Specified file does not exist.");
                return;
            }
            if (!Directory.Exists(args[1])) Directory.CreateDirectory(args[1]);
            RSHWFile file = RSHWLoader.Load(args[0]);
            if (file.signalData == null)
            {
                Console.WriteLine("FATAL: This file contains no signal data.");
                return;
            }
            if (file.audioData != null) File.WriteAllBytes(args[1] + "/audio_out.wav", file.audioData);
            if (file.videoData != null) File.WriteAllBytes(args[1] + "/video_out.mp4", file.videoData);
            Console.WriteLine("Wrote out audio and video data.");

            List<BitArray> rshwBits = new List<BitArray>();
            int countlength = 0;
            if (file.signalData[0] != 0)
            {
                countlength = 1;
                BitArray bit = new BitArray(300);
                rshwBits.Add(bit);
            }
            for (int i = 0; i < file.signalData.Length; i++)
            {
                if (file.signalData[i] == 0)
                {
                    countlength += 1;
                    BitArray bit = new BitArray(300);
                    rshwBits.Add(bit);
                }
                else
                {
                    rshwBits[countlength - 1].Set(file.signalData[i], true);
                }
            }
            Console.WriteLine("Loaded RSHW signal data.");

            List<string> writeOut = new List<string>();
            int hfb = 0;
            foreach (BitArray bits in rshwBits)
            {
                int frameByte = 0;
                for (int i = 0; i < 19; i++)
                {
                    if (bits.Get(targetBits[i])) frameByte += 1 << i;
                }
                if (frameByte > hfb) hfb = frameByte;
                writeOut.Add(frameByte.ToString("X8"));
            }
            File.WriteAllLines(args[1] + "/signals_out.mts", writeOut.ToArray());
            Console.WriteLine("Wrote out signal data.");

            File.WriteAllText(args[1] + "/manifest.ini", $"; Exported by Mitzifier\nname={Path.GetFileNameWithoutExtension(args[0])} Helen/Mitzi \nvideo=video_out.mp4\naudio=audio_out.wav\ndata=signals_out.mts\nframes-per-second=60\nbits-per-frame=32");
            Console.WriteLine("Wrote out manifest.");
            if (file.videoData == null) Console.WriteLine("Warning: Video data was blank, you will need to add the file manually.");
            Console.WriteLine("Complete!");
            Console.WriteLine("Highest frame byte was " + hfb.ToString("B32"));
        }

        public static int[] targetBits = { 168, 169, 170, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188 };
    }
}