<?php

namespace NoccyLabs\TermBuf\Renderer;

use NoccyLabs\TermBuf\TerminalBuffer;

class TerminalRenderer
{


    public function render(TerminalBuffer $buffer)
    {

        $lines = $buffer->getLines();
        $cols = $buffer->getColumns();

        $this->clearScreen();
        for ($line = 0; $line < $lines; $line++) {
            for ($column = 0; $column < $cols; $column++) {
                $this->renderChar($line, $column, $buffer->bufferGetRaw($line, $column));
            }
        }

    }

    private function clearScreen()
    {
        echo "\e[H\e[2J";
    }

    private function renderChar(int $line, int $column, array $raw)
    {
        [ $char, $attrs ] = $raw;
        if ($char === ' ') return;
        $attr = join(";", $attrs)??"0";
        printf("\e[%d;%dH\e[%sm%s", $line + 1, $column + 1, $attr, $char);
    }

}