#include <iostream>
#include <string.h>
#include <stdlib.h>
#include "BMP.h"
using namespace std;

void usage(const char * progName)
{
    cout << "Usage: " << progName << " [options] <input-BMP-file>" << endl;
    cout << "  Options:" << endl;
    cout << "    -l threshold_level : set threshold level" << endl;
    exit(42);
}

int main(int argc, char * argv[])
{
    int argi;
    string inputFileName;
    string outputFileName;
    unsigned int threshold_level = 60;

    if (argc < 2)
        usage(argv[0]);

    for (argi = 0; argi < argc; argi++)
    {
        if (!strcmp(argv[argi], "-l"))
        {
            if (argi >= argc - 1)
                usage(argv[0]);
            argi++;
            threshold_level = atoi(argv[argi]);
        }
        else
        {
            inputFileName = argv[argi];
            outputFileName = string(argv[argi], strlen(argv[argi]) - 4);
            outputFileName += "-edges.bmp";
        }
    }


    BMP inputImage(inputFileName.c_str());
    unsigned char * data =
        new unsigned char[inputImage.getWidth() * inputImage.getHeight() * 3];
    inputImage.read(data);

    unsigned char * data_ptr = data;
    for (int i = 0; i < inputImage.getWidth() * inputImage.getHeight(); i++)
    {
        *data_ptr++ = 0;
        *data_ptr++ = 0;
        data_ptr++;
    }

    BMP edges(outputFileName.c_str(),
              inputImage.getWidth(),
              inputImage.getHeight(),
              data);
    delete[] data;
}