#include <iostream>
#include <sndfile.hh>
#include <algorithm>
#include <fstream>
using namespace std;
int decode(u_int8_t * array,size_t ssize, string filename);
int main(int argc, char *argv[])
{
    if (argc < 3) {
        cerr << "No output specified" << endl << "Where will it go then?" << endl;
        return 1;
    }
    if (argc < 2) {
        cerr << "No input specified" << endl;
        return 1;
    }
    ifstream Input(argv[1], ios::binary | ios::ate);
    if(!Input) {
        cerr << "Failed to open data" << endl;
        return -1;
    }
    streamsize size = Input.tellg();
    if (size < 0) {
        cerr << "Failed to find file size" << endl;
        return -1;
    }
    char buffer[(size_t)size];
    cout << (size_t)size << endl;
    Input.seekg(0,ios::beg);
    if (!Input.read(buffer,size)) {
        cerr << "nooo" << endl;
        return -1;
    }
    return  decode((u_int8_t*)buffer,(size_t)size,argv[2]);
}
int8_t Fetch(u_int8_t toDecode, bool decodeSecond)
{
    int8_t output = 0;
    if (decodeSecond)
    {
        output = int((toDecode & 0xf0) >> 4) - 8;
    } else
    {
        output = int(toDecode & 0b00001111) - 8;
    }
    return output;
}
int decode(u_int8_t * array,size_t ssize, string filename)
{
    int16_t currentSample = 0;
    size_t arraySize = ssize;
    int16_t output[arraySize * 2] = {0};
    cout << " size " << arraySize * 2 << endl;
    int8_t currentError = 0;
    for (u_int32_t i = 0; i < arraySize * 2; i++) {
        currentError = Fetch(array[(int)(i /2)],(int)(i % 2));
        currentSample += currentError;
        output[i] = currentSample;
        cout << "Sample " << i <<" Error " << (int)currentError << " Step " << currentSample << " Decodery \n";
    }
    int maxval = *std::max_element(output, output + sizeof(output) / sizeof(output[0]));
    int minval = *std::min_element(output, output + sizeof(output) / sizeof(output[0]));
    int toNorm = 32767 / max(maxval,-minval);
    cout << toNorm <<" "<< maxval << endl;
    for (int t = 0;t < sizeof(output) / sizeof(output[0]); t++){
        output[t] *= toNorm;
    }
    const int channels = 1;
    const int sampleRate = 8000;
    const int format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
    const char* outfilename = filename.c_str();
    SndfileHandle outfile(outfilename, SFM_WRITE, format, channels, sampleRate);
    if (!outfile) {
        cout << "Failed to open wave";
        return 1;
    }
    outfile.write(output,sizeof(output) / sizeof(output[0]));
    cout << "Output sucsessfly packaged as " << filename << endl ;
    return 0;
}

#include <stdio.h>
int main() {
  printf("Hello, World!");
  return 0;
}

#include <iostream>
using namespace std;
int main() {
  cout << "Hello, World!";
  return 0;
}

using System;
namespace Hello {
  class Hello {
     static void Main(string[] args) {
        Console.WriteLine("Hello, World!");
     }
  }
}