<?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_unique_slug(string $value, callable $exists): string
{
    $base = Web::instance()->slug(trim($value));
    if ($base === '') {
        $base = 'article';
    }

    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()));

        $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);

        return is_string($formatted) && $formatted !== '' ? $formatted : $value;
    } catch (Throwable) {
        return $value;
    }
}