<?php

declare(strict_types=1);

namespace App\Support;

use PDO;

/**
 * Thin wrapper around a PDO connection to the SQLite database.
 */
final class Database
{
    private PDO $pdo;

    public function __construct(string $path)
    {
        $this->pdo = new PDO('sqlite:' . $path, null, null, [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES => false,
        ]);

        $this->pdo->exec('PRAGMA foreign_keys = ON');
        $this->pdo->exec('PRAGMA journal_mode = WAL');
    }

    public function pdo(): PDO
    {
        return $this->pdo;
    }

    /**
     * SQL expression for the current UTC time, in the format every
     * created_at/updated_at/*_at column uses (both as their DEFAULT in the
     * migrations and wherever a repository sets one explicitly).
     */
    public static function nowExpr(): string
    {
        return "strftime('%Y-%m-%dT%H:%M:%SZ', 'now')";
    }
}