<?php

namespace Tests\Unit;

use PHPUnit\Framework\TestCase;
use ReflectionClass;
use Services\Database;
use Services\DataBase\Classes\PdoDriver;
use System\Classes\Config;
use System\Classes\MyException;

class DatabaseTest extends TestCase
{
    protected function tearDown(): void
    {
        // Сбрасываем кэш подключений Database и загруженный Config, чтобы тесты не влияли друг на друга.
        $ref  = new ReflectionClass(Database::class);
        $prop = $ref->getProperty('_instances');
        $prop->setAccessible(true);
        $prop->setValue(null, []);

        $ref  = new ReflectionClass(Config::class);
        $prop = $ref->getProperty('config');
        $prop->setAccessible(true);
        $prop->setValue(null, null);
    }

    public function testDefaultConnectionReturnsPdoDriver(): void
    {
        $this->assertInstanceOf(PdoDriver::class, Database::instance());
    }

    public function testInstanceIsCachedPerConnectionName(): void
    {
        $this->assertSame(Database::instance('default'), Database::instance('default'));
    }

    public function testDifferentConnectionNamesAreDistinctInstances(): void
    {
        Config::set('db', [
            'default' => ['driver' => 'pdo', 'connection' => ['host' => 'db', 'dbname' => 'a']],
            'second'  => ['driver' => 'pdo', 'connection' => ['host' => 'db', 'dbname' => 'b']],
        ]);

        $this->assertNotSame(Database::instance('default'), Database::instance('second'));
    }

    public function testUnknownConnectionNameThrows(): void
    {
        $this->expectException(MyException::class);
        Database::instance('nonexistent');
    }

    public function testUnknownDriverThrows(): void
    {
        Config::set('db', ['bad' => ['driver' => 'mysqli', 'connection' => []]]);

        $this->expectException(MyException::class);
        Database::instance('bad');
    }
}