package lib;

import lib.Color;
import kernel.ui.TermWriteable;

/**
	Helpfull class for writing onto a `TermWriteable`.
**/
class TermIO {
	private var output:TermWriteable;

	public function new(output:TermWriteable) {
		this.output = output;

		output.reset();
		output.setCursorPos(0, 0);
	}

	public function writeLn(text:String, ?textColor:Color) {
		if (textColor != null) {
			output.setTextColor(textColor);
		}

		var size = output.getSize();
		var cPos = output.getCursorPos();

		if (cPos.y >= size.y){
			newLine();
		}

		for (i in 0...Math.floor(text.length / size.x) + 1) {
			output.write(text.substr(i * size.x, size.x));
			newLine();
		}

		if (textColor != null) {
			output.setTextColor(White);
		}
	}

	private function newLine() {
		var cPos = output.getCursorPos();

		if (cPos.y == output.getSize().y) {
			output.scroll(1);
			output.setCursorPos(0, cPos.y - 1);
		} else {
			output.setCursorPos(0, cPos.y + 1);
		}
	}
}