<?php
/** @license MIT
 * Copyright 2017 J. King, Dustin Wilson et al.
 * See LICENSE and AUTHORS files for details */

declare(strict_types=1);

namespace JKingWeb\Arsse\Db\MySQL;

use JKingWeb\Arsse\Arsse;
use JKingWeb\Arsse\Db\Exception;

class PDODriver extends Driver {
    use \JKingWeb\Arsse\Db\PDODriver;

    protected $db;

    public static function requirementsMet(): bool {
        return class_exists("PDO") && in_array("mysql", \PDO::getAvailableDrivers());
    }

    protected function makeConnection(string $db, string $user, string $password, string $host, int $port, string $socket): void {
        $dsn = "mysql:".implode(";", [
            "charset=utf8mb4",
            "dbname=$db",
            "host=$host",
            "socket=$socket",
            "port=$port",
        ]);
        try {
            $this->db = new \PDO($dsn, $user, $password, [
                \PDO::ATTR_ERRMODE           => \PDO::ERRMODE_EXCEPTION,
                \PDO::ATTR_STRINGIFY_FETCHES => true,
            ]);
        } catch (\PDOException $e) {
            $msg = $e->getMessage();
            $code = (int) substr($msg, 17, 4);
            $msg = substr($msg, 23);
            [$excClass, $excMsg, $excData] = $this->buildConnectionException($code, $msg);
            throw new $excClass($excMsg, $excData);
        }
    }

    public function __destruct() {
        unset($this->db);
    }

    /** @codeCoverageIgnore */
    public static function create(): \JKingWeb\Arsse\Db\Driver {
        if (self::requirementsMet()) {
            return new self;
        } elseif (Driver::requirementsMet()) {
            return new Driver;
        } else {
            throw new Exception("extMissing", self::driverName());
        }
    }

    public function prepareArray(string $query, array $paramTypes): \JKingWeb\Arsse\Db\Statement {
        return new PDOStatement($this->db, $query, $paramTypes);
    }

    public static function driverName(): string {
        return Arsse::$lang->msg("Driver.Db.MySQLPDO.Name");
    }
}