#!/usr/bin/env php
<?php
/**
 * Add a new blog post from a markdown file
 * Usage: php add-blog-post.php post.md
 * 
 * Markdown format:
 * ---
 * title: Your Post Title
 * excerpt: Brief excerpt for homepage
 * ---
 * 
 * Your full blog post content here...
 * 
 * Use double newlines for paragraphs.
 */

$blogFile = __DIR__ . '/../data/posts.json';

if ($argc < 2) {
    echo "Usage: php add-blog-post.php post.md\n";
    exit(1);
}

$markdownFile = $argv[1];

if (!file_exists($markdownFile)) {
    echo "Error: File '$markdownFile' not found\n";
    exit(1);
}

$content = file_get_contents($markdownFile);

// Parse frontmatter
if (!preg_match('/^---\s*\n(.*?)\n---\s*\n(.*)$/s', $content, $matches)) {
    echo "Error: Invalid markdown format. Expected frontmatter with --- delimiters.\n";
    echo "Format:\n---\ntitle: Your Title\nexcerpt: Your excerpt\n---\n\nContent...\n";
    exit(1);
}

$frontmatter = $matches[1];
$postContent = trim($matches[2]);

// Parse frontmatter fields
$title = null;
$excerpt = null;

foreach (explode("\n", $frontmatter) as $line) {
    if (preg_match('/^title:\s*(.+)$/i', trim($line), $m)) {
        $title = trim($m[1]);
    } elseif (preg_match('/^excerpt:\s*(.+)$/i', trim($line), $m)) {
        $excerpt = trim($m[1]);
    }
}

if (!$title || !$excerpt) {
    echo "Error: Missing required fields. Need 'title:' and 'excerpt:' in frontmatter.\n";
    exit(1);
}

if (empty($postContent)) {
    echo "Error: Post content is required\n";
    exit(1);
}

// Load existing posts
$posts = [];
if (file_exists($blogFile)) {
    $json = file_get_contents($blogFile);
    $posts = json_decode($json, true) ?: [];
}

// Get next ID
$nextId = 0;
if (!empty($posts)) {
    $ids = array_column($posts, 'id');
    $nextId = max($ids) + 1;
}

// Get today's date
$date = date('Y-m-d');

// Create new post
$newPost = [
    'id' => $nextId,
    'title' => $title,
    'date' => $date,
    'excerpt' => $excerpt,
    'content' => $postContent
];

// Add to array
$posts[] = $newPost;

// Write back to file
file_put_contents($blogFile, json_encode($posts, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . "\n");

echo "Blog post added successfully!\n";
echo "ID: $nextId\n";
echo "Date: $date\n";
echo "Title: $title\n";