<?php
namespace Misuzu;

use PDO;
use InvalidArgumentException;
use Index\Data\IDbConnectionInfo;
use Index\Data\MariaDB\MariaDBConnectionInfo;
use Misuzu\Database\Database;

/**
 * @method static int queries()
 * @method static int exec(string $stmt)
 * @method static \Misuzu\Database\DatabaseStatement prepare(string $stmt, array $options = [])
 * @method static \Misuzu\Database\DatabaseStatement query(string $stmt, ?int $fetchMode = null, ...$args)
 * @method static int lastId()
 */
final class DB {
    private static $instance;

    public const ATTRS = [
        PDO::ATTR_CASE => PDO::CASE_NATURAL,
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
        PDO::ATTR_STRINGIFY_FETCHES => false,
        PDO::ATTR_EMULATE_PREPARES => false,
    ];

    public static function init(IDbConnectionInfo $connInfo) {
        if(!($connInfo instanceof MariaDBConnectionInfo))
            throw new InvalidArgumentException('$connInfo must be an instance of MariaDBConnectionInfo (only mariadb/mysql is supported).');

        $dsn = 'mysql:';

        if($connInfo->isUnixSocket())
            $dsn .= 'unix_socket=' . $connInfo->getSocketPath() . ';';
        else {
            $dsn .= 'host=' . $connInfo->getHost() . ';';
            $dsn .= 'port=' . $connInfo->getPort() . ';';
        }

        $dsn .= 'dbname=' . $connInfo->getDatabaseName() . ';';

        if($connInfo->hasCharacterSet())
            $dsn .= 'charset=' . $connInfo->getCharacterSet() . ';';

        self::$instance = new Database($dsn, $connInfo->getUserName(), $connInfo->getPassword(), self::ATTRS);
    }

    public static function __callStatic(string $name, array $args) {
        return self::$instance->{$name}(...$args);
    }

    public static function getInstance(): Database {
        return self::$instance;
    }
}