if (process.argv.length < 3)
{
    console.log('Usage: node DrawPixelOnConsole.js <image-url> [optional:reverse]');
    return;
}

let Jimp = require('jimp');

let printCharCondition = (x) =>
    process.argv.length >= 4 ? (x < 255 * 0.5 ) : (x > 255 * 0.5);

let url = process.argv[2];
Jimp.read(url).then
(function (image) {
    console.log('\x1b[36m%s\x1b[0m', 'Image size:' + image.bitmap.width + " x " + image.bitmap.height);

    for(let y = 0; y < image.bitmap.height; y++)
    {
        for(let x = 0; x < image.bitmap.width; x++)
        {
            let color = image.getPixelColor(x, y);

            let r = (color & 0xFF000000) >>> 24;
            let g = (color & 0x00FF0000) >>> 16;
            let b = (color & 0x0000FF00) >>> 8;
            //let a = (color & 0x000000FF);
            let illu = 0.2126 * r + 0.7152 * g + 0.0722 * b;

            if (printCharCondition(illu))
            {
                process.stdout.write('  ');
            }
            else
            {
                process.stdout.write('██');
            }
        }
        process.stdout.write('\n');
    }
},
function (err)
{
    console.log(err);
});