"use strict";

import fs from 'fs';

import l from '../../Helpers/Log.mjs';
import a from '../../Helpers/Ansi.mjs';

import Terrain50 from 'terrain50';
import Terrain50Renderer from './Terrain50Renderer.mjs';

export default async function(settings) {
	if(typeof settings.cli.input !== "string") {
		l.error("Error: No input file specified (try --filename path/to/file.asc)");
		process.exit(1);
	}
	if(typeof settings.cli.output !== "string") {
		l.error("Error: No output file specified (try --filename-output path/to/image.png)");
		process.exit(1);
	}
	
	let terrain50 = Terrain50.Parse(
		await fs.promises.readFile(settings.cli.input, "utf-8")
	);
	
	let renderer = new Terrain50Renderer(settings.scale_factor | 1);
	let png_buffer = await renderer.render(terrain50);
	
	if(!(png_buffer instanceof Buffer))
		throw new Error(`Error: Renderer did not return Buffer (found unexpected ${png_buffer} instead)`);
	
	await fs.promises.writeFile(
		settings.cli.output,
		png_buffer
	);
	l.log(`Written to ${a.hicol}${settings.cli.output}${a.reset}`);
}