<?php

declare(strict_types=1);

// ── Core ────────────────────────────────────────────────────────────

function app_root(): string
{
    return dirname(__DIR__, 2);
}

function app_timezone(): string
{
    $timezone = trim((string) Base::instance()->get('app.timezone'));
    return ($timezone !== '' && in_array($timezone, DateTimeZone::listIdentifiers(), true)) ? $timezone : 'UTC';
}

function app_now(): string
{
    return gmdate('Y-m-d H:i:s');
}

function app_is_prod(): bool
{
    return Base::instance()->get('app.env') === 'prod';
}

// ── Fichiers et chemins ─────────────────────────────────────────────

function app_ensure_dir(string $path): void
{
    if (!is_dir($path)) {
        mkdir($path, 0775, true);
    }
}

function app_db_path(): string
{
    return app_root() . '/db/app.sqlite';
}

function app_logs_dir(): string
{
    return app_root() . '/logs';
}

function app_public_media_dir(): string
{
    return app_root() . '/public/uploads/media';
}

function app_media_url(string $fileName): string
{
    return rtrim((string) Base::instance()->get('BASE'), '/') . '/uploads/media/' . rawurlencode($fileName);
}

// ── Texte ───────────────────────────────────────────────────────────

function app_slugify(string $value): string
{
    $slug = Web::instance()->slug(trim($value));
    return $slug !== '' ? $slug : 'article';
}

function app_unique_slug(string $value, callable $exists): string
{
    $base = app_slugify($value);
    if (!$exists($base)) {
        return $base;
    }

    for ($i = 2; $i <= 1000; $i++) {
        $candidate = $base . '-' . $i;
        if (!$exists($candidate)) {
            return $candidate;
        }
    }

    throw new RuntimeException('Impossible de générer un slug unique.');
}

function app_format_datetime_fr(string $value): string
{
    static $utc, $formatter;

    $value = trim($value);
    if ($value === '') {
        return '';
    }

    try {
        $utc ??= new DateTimeZone('UTC');
        $date = DateTimeImmutable::createFromFormat('Y-m-d H:i:s', $value, $utc);
        if (!$date instanceof DateTimeImmutable) {
            $date = new DateTimeImmutable($value, $utc);
        }

        $date = $date->setTimezone(new DateTimeZone(date_default_timezone_get()));

        if (class_exists('IntlDateFormatter')) {
            $formatter ??= new IntlDateFormatter(
                'fr_FR',
                IntlDateFormatter::LONG,
                IntlDateFormatter::SHORT,
                date_default_timezone_get(),
                IntlDateFormatter::GREGORIAN,
                "d MMMM yyyy 'à' HH:mm"
            );

            $formatted = $formatter->format($date);
            if (is_string($formatted) && $formatted !== '') {
                return $formatted;
            }
        }

        $months = [
            1 => 'janvier', 2 => 'février', 3 => 'mars', 4 => 'avril',
            5 => 'mai', 6 => 'juin', 7 => 'juillet', 8 => 'août',
            9 => 'septembre', 10 => 'octobre', 11 => 'novembre', 12 => 'décembre',
        ];

        return sprintf(
            '%d %s %d à %s',
            (int) $date->format('j'),
            $months[(int) $date->format('n')] ?? $date->format('F'),
            (int) $date->format('Y'),
            $date->format('H:i')
        );
    } catch (Throwable) {
        return $value;
    }
}