// node script.js filename.txt

const {
	createCanvas,
	loadImage
} = require('canvas')
const fs = require('fs');
const bigInt = require("big-integer");

var args = process.argv.slice(2)

var input = fs.readFileSync(args.join('')).toString();
console.log("input loaded");
var sanitized = input.replace(/[^0-9a-zA-Z]/g, "");
console.log("input sanitized");

var image_data = bigInt(sanitized, 64).toString(2);
var image_size = Math.ceil(Math.pow(image_data.length, 0.5));
console.log("Image size: "+image_size);
const canvas = createCanvas(image_size, image_size);
const ctx = canvas.getContext('2d');

for (var i = 0; i < image_data.length; i++) {
	var x = i%image_size;
	var y = Math.floor(i/image_size);
	if (image_data[i] == "1") {
		ctx.fillStyle = "#000000";
	} else {
		ctx.fillStyle = "#FFFFFF";
	}
	ctx.fillRect( x, y, 1, 1 );
	if (y != Math.floor((i-1)/image_size)) {
		console.log("row "+y+" of "+image_size);
	}
}
var d = new Date();
var fn = "output/test_"+(d.getTime())+".png";
var out = fs.createWriteStream(fn)
const stream = canvas.createPNGStream({
	quality: 0.95,
	chromaSubsampling: false
})
stream.pipe(out)
out.on('finish', () => {
	return console.log("done");
});