#!/usr/bin/env php
<?php
declare(strict_types=1);

use NeonBlog\ContentRepository;

$app = require dirname(__DIR__) . '/app/bootstrap.php';
$repo = $app->repository();
$comments = $app->comments();
$config = $app->config();
$stats = $app->stats();

$argv = $_SERVER['argv'] ?? [];
array_shift($argv);
$command = array_shift($argv) ?? 'help';

try {
    match ($command) {
        'help', '--help', '-h' => help(),
        'init' => init($repo),
        'rebuild' => rebuild($repo),
        'list' => listContent($repo, options($argv)),
        'create' => createContent($repo, $argv),
        'update' => updateContent($repo, $argv),
        'delete' => deleteContent($repo, $argv),
        'comments:list' => listComments($comments, options($argv)),
        'comments:approve' => setCommentStatus($comments, $argv, 'approved'),
        'comments:pending' => setCommentStatus($comments, $argv, 'pending'),
        'comments:spam' => setCommentStatus($comments, $argv, 'spam'),
        'comments:delete' => deleteComment($comments, $argv),
        'site:set' => setConfig($config, $argv),
        'social:list' => listSocial($config),
        'social:add' => addSocial($config, $argv),
        'stats:summary' => statsSummary($stats),
        default => fail('Unknown command "' . $command . '". Run php cli/blog.php help.'),
    };
} catch (Throwable $error) {
    fail($error->getMessage());
}

function help(): void
{
    echo <<<TEXT
Ty Clifford CMS CLI

Content:
  php cli/blog.php init
  php cli/blog.php list [--type=post|page] [--all]
  php cli/blog.php create "Title" [--slug=custom] [--type=post|page] [--status=published|draft] [--category=Name] [--tags=a,b] [--summary=text] [--body-file=/path/file.md] [--no-comments]
  php cli/blog.php update slug [--title=New] [--status=published|draft] [--category=Name] [--tags=a,b] [--summary=text] [--body-file=/path/file.md]
  php cli/blog.php delete slug
  php cli/blog.php rebuild

Comments:
  php cli/blog.php comments:list [--status=pending|approved|spam] [--slug=post-slug]
  php cli/blog.php comments:approve 12
  php cli/blog.php comments:pending 12
  php cli/blog.php comments:spam 12
  php cli/blog.php comments:delete 12

Site:
  php cli/blog.php site:set site.title "My Blog"
  php cli/blog.php social:list
  php cli/blog.php social:add github "GitHub" https://github.com/example
  php cli/blog.php stats:summary

TEXT;
}

function init(ContentRepository $repo): void
{
    $repo->rebuildIndex();
    line('Content index rebuilt.');
}

function rebuild(ContentRepository $repo): void
{
    $repo->rebuildIndex();
    line('Content index rebuilt.');
}

/** @param array<string, mixed> $opts */
function listContent(ContentRepository $repo, array $opts): void
{
    $includeDrafts = isset($opts['all']);
    $type = (string) ($opts['type'] ?? 'post');
    $items = $type === 'page' ? $repo->pages($includeDrafts) : $repo->posts($includeDrafts);

    if ($items === []) {
        line('No content found.');
        return;
    }

    foreach ($items as $item) {
        printf(
            "%-22s %-10s %-10s %s\n",
            $item['slug'],
            $item['type'],
            $item['status'],
            $item['title']
        );
    }
}

/** @param array<int, string> $args */
function createContent(ContentRepository $repo, array $args): void
{
    $title = array_shift($args);
    if ($title === null || str_starts_with($title, '--')) {
        fail('A title is required.');
    }
    $opts = options($args);
    $slug = (string) ($opts['slug'] ?? ContentRepository::slugify($title));
    $body = bodyFromOptions($opts, "# {$title}\n\nStart writing here.");
    $metadata = metadataFromOptions($opts, [
        'title' => $title,
        'type' => $opts['type'] ?? 'post',
        'status' => $opts['status'] ?? 'draft',
    ]);

    $item = $repo->save($slug, $metadata, $body);
    line('Saved ' . $item['type'] . ' "' . $item['title'] . '" at bl-content/pages/' . $item['slug'] . '/index.txt');
}

/** @param array<int, string> $args */
function updateContent(ContentRepository $repo, array $args): void
{
    $slug = array_shift($args);
    if ($slug === null || str_starts_with($slug, '--')) {
        fail('A slug is required.');
    }

    $item = $repo->find($slug, true);
    if ($item === null) {
        fail('No content exists for slug "' . $slug . '".');
    }

    $opts = options($args);
    $body = bodyFromOptions($opts, (string) $item['markdown']);
    $metadata = metadataFromOptions($opts, $item);
    $newSlug = (string) ($opts['slug'] ?? $slug);
    $saved = $repo->save($newSlug, $metadata, $body);
    if ($newSlug !== $slug) {
        $repo->delete($slug);
    }

    line('Updated ' . $saved['slug'] . '.');
}

/** @param array<int, string> $args */
function deleteContent(ContentRepository $repo, array $args): void
{
    $slug = $args[0] ?? '';
    if ($slug === '') {
        fail('A slug is required.');
    }

    line($repo->delete($slug) ? 'Deleted ' . $slug . '.' : 'No content exists for slug "' . $slug . '".');
}

/** @param array<string, mixed> $opts */
function listComments($comments, array $opts): void
{
    $rows = $comments->list($opts['status'] ?? null, $opts['slug'] ?? null);
    if ($rows === []) {
        line('No comments found.');
        return;
    }

    foreach ($rows as $row) {
        printf(
            "#%-4d %-9s %-20s %-18s %s\n",
            $row['id'],
            $row['status'],
            $row['slug'],
            $row['author'],
            mb_substr(str_replace(["\r", "\n"], ' ', $row['body']), 0, 64)
        );
    }
}

/** @param array<int, string> $args */
function setCommentStatus($comments, array $args, string $status): void
{
    $id = (int) ($args[0] ?? 0);
    if ($id < 1) {
        fail('A numeric comment id is required.');
    }

    line($comments->setStatus($id, $status) ? 'Comment updated.' : 'Comment not found.');
}

/** @param array<int, string> $args */
function deleteComment($comments, array $args): void
{
    $id = (int) ($args[0] ?? 0);
    if ($id < 1) {
        fail('A numeric comment id is required.');
    }

    line($comments->delete($id) ? 'Comment deleted.' : 'Comment not found.');
}

/** @param array<int, string> $args */
function setConfig($config, array $args): void
{
    $key = $args[0] ?? '';
    $value = $args[1] ?? null;
    if ($key === '' || $value === null) {
        fail('Usage: php cli/blog.php site:set site.title "My Blog"');
    }
    $config->set($key, parseCliValue($value));
    $config->save();
    line('Updated config key ' . $key . '.');
}

function listSocial($config): void
{
    $social = $config->get('social', []);
    if (!is_array($social) || $social === []) {
        line('No social links configured.');
        return;
    }
    foreach ($social as $network => $item) {
        printf("%-14s %-18s %s\n", $network, $item['label'] ?? $network, $item['url'] ?? '');
    }
}

/** @param array<int, string> $args */
function addSocial($config, array $args): void
{
    [$network, $label, $url] = [$args[0] ?? '', $args[1] ?? '', $args[2] ?? ''];
    if ($network === '' || $label === '' || $url === '') {
        fail('Usage: php cli/blog.php social:add github "GitHub" https://github.com/example');
    }

    $social = $config->get('social', []);
    $social[$network] = ['label' => $label, 'url' => $url];
    $config->set('social', $social);
    $config->save();
    line('Added social link ' . $network . '.');
}

function statsSummary($stats): void
{
    $summary = $stats->summary();
    line('Visits: ' . $summary['visits']);
    line('Routes:');
    foreach ($summary['routes'] as $route => $count) {
        line('  ' . $route . ': ' . $count);
    }
    line('Top paths:');
    foreach ($summary['top_paths'] as $path => $count) {
        line('  ' . $path . ': ' . $count);
    }
}

/** @param array<int, string> $args @return array<string, mixed> */
function options(array $args): array
{
    $options = [];
    foreach ($args as $arg) {
        if (!str_starts_with($arg, '--')) {
            continue;
        }
        $arg = substr($arg, 2);
        if (str_contains($arg, '=')) {
            [$key, $value] = explode('=', $arg, 2);
            $options[$key] = parseCliValue($value);
        } else {
            $options[$arg] = true;
        }
    }

    return $options;
}

/** @param array<string, mixed> $opts @param array<string, mixed> $base @return array<string, mixed> */
function metadataFromOptions(array $opts, array $base): array
{
    foreach (['title', 'slug', 'type', 'status', 'date', 'category', 'summary', 'author', 'cover', 'menu_order'] as $key) {
        if (array_key_exists($key, $opts)) {
            $base[$key] = $opts[$key];
        }
    }
    if (array_key_exists('tags', $opts)) {
        $base['tags'] = ContentRepository::normalizeList($opts['tags']);
    }
    if (isset($opts['no-comments'])) {
        $base['allow_comments'] = false;
    }

    return $base;
}

/** @param array<string, mixed> $opts */
function bodyFromOptions(array $opts, string $fallback): string
{
    if (!isset($opts['body-file'])) {
        return $fallback;
    }
    $path = (string) $opts['body-file'];
    if (!is_file($path)) {
        fail('Body file not found: ' . $path);
    }

    return (string) file_get_contents($path);
}

function parseCliValue(string $value): mixed
{
    $lower = mb_strtolower($value);
    if (in_array($lower, ['true', 'false'], true)) {
        return $lower === 'true';
    }
    if (is_numeric($value) && preg_match('/^\d+$/', $value)) {
        return (int) $value;
    }

    return $value;
}

function line(string $message): void
{
    echo $message . PHP_EOL;
}

function fail(string $message): never
{
    fwrite(STDERR, $message . PHP_EOL);
    exit(1);
}