<?php
declare(strict_types=1);

/**
 * Base database for Nexus core (users, settings, modules).
 * Prefer the deployed root config, but fall back to checked-in env defaults.
 */

$candidates = [
    __DIR__ . '/db_settings_basic.php',
    __DIR__ . '/staging/db_settings_basic.php',
    __DIR__ . '/prod/db_settings_basic.php',
];

foreach ($candidates as $path) {
    if (is_file($path)) {
        return require $path;
    }
}

throw new RuntimeException(
    'Missing base DB config. Expected one of: '
    . implode(', ', array_map(static fn (string $path): string => basename(dirname($path)) . '/' . basename($path), $candidates))
);