<?php

declare(strict_types=1);

require __DIR__ . '/vendor/autoload.php';

$opts = getopt('o:t:', rest_index: $rest_index);
$rest = array_slice($argv, $rest_index);

$gemlog_input_path = $rest[0] ?? null;
$gemlog_output_path = $opts['o'] ?? null;
$trim_prefix = $opts['t'] ?? null;

if (is_null($gemlog_input_path) || !file_exists($gemlog_input_path)) {
    throw new \Exception('Please provide an input gemlog file listing some articles. Got: ' . $gemlog_input_path);
}

if (is_null($gemlog_output_path) || !is_dir($gemlog_output_path)) {
    throw new \Exception('Please provide a destination directory using -o');
}

$dir = dirname($gemlog_input_path);

$gemlog = new LogseqGem\GemlogParser;
$article = new LogseqGem\ArticleParser;

$gemlog->load($gemlog_input_path);
$titles = $gemlog->getTitles();

foreach ($titles as $title) {
    $encoded_title = str_replace('/', '%2F', $title);
    $article_path = $dir . '/' . $encoded_title . '.md';
    $article->load($article_path);
    $gemtext = $article->convert();

    if (!$article->isPublished() || empty($gemtext)) {
        continue;
    }

    $sanitized_title = $title;

    if ($trim_prefix && strpos($sanitized_title, $trim_prefix) === 0) {
        $sanitized_title = substr($sanitized_title, strlen($trim_prefix));
    }

    $sanitized_title = strtolower($sanitized_title);
    $sanitized_title = str_replace([' ', ','], ['-'], $sanitized_title);
    $sanitized_title .= '.gmi';

    $output_path = $gemlog_output_path . '/' . $sanitized_title;

    echo "Writing to ", $sanitized_title, "...\n";

    $date = strtotime($article->getProperties()['date'] ?? null);
    if (empty($date)) {
        throw new Exception('Article ' . $title . ' has no date property');
    }

    $output = sprintf(
        "# %s\n\n%s\n\n%s\n\n=> /gemlog.gmi gemlog\n=> / home\n",
        $title,
        date('j F Y', $date),
        $gemtext
    );

    file_put_contents($output_path, $output);
}