<?php

namespace Tests\Unit;

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

class PdoDriverTest extends TestCase
{
    private PdoDriver $driver;

    protected function setUp(): void
    {
        $config       = Config::get('db', 'default')['connection'] ?? [];
        $this->driver = new PdoDriver($config);

        try {
            $this->driver->pdo();
        } catch (MyException $e) {
            $this->markTestSkipped('Нет живого подключения к MariaDB (заполните App/config/config.local.php): ' . $e->getMessage());
        }

        $this->driver->exec('DROP TABLE IF EXISTS pdo_driver_test');
        $this->driver->exec('CREATE TABLE pdo_driver_test (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255))');
    }

    protected function tearDown(): void
    {
        Profiler::reset();

        if (isset($this->driver)) {
            try {
                $this->driver->exec('DROP TABLE IF EXISTS pdo_driver_test');
            } catch (MyException) {
                // соединения не было — нечего дропать
            }
        }
    }

    public function testFailoverThrowsWithAllHostErrors(): void
    {
        // Чисто логика failover — не требует живой БД, оба хоста заведомо недоступны
        $driver = new PdoDriver(['hosts' => ['bad-host-1', 'bad-host-2'], 'dbname' => 'x', 'user' => 'x', 'password' => 'x']);

        try {
            $driver->pdo();
            $this->fail('Ожидалось MyException');
        } catch (MyException $e) {
            $this->assertStringContainsString('bad-host-1', $e->getMessage());
            $this->assertStringContainsString('bad-host-2', $e->getMessage());
        }
    }

    public function testQueryInsertsAndSelects(): void
    {
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['foo']);
        $row = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['foo'])->fetch();

        $this->assertSame('foo', $row['name']);
    }

    public function testLastInsertId(): void
    {
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['foo']);
        $this->assertNotFalse($this->driver->lastInsertId());
    }

    public function testCommitPersistsChanges(): void
    {
        $this->driver->beginTransaction();
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['committed']);
        $this->driver->commit();

        $row = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['committed'])->fetch();
        $this->assertNotFalse($row);
    }

    public function testRollbackDiscardsChanges(): void
    {
        $this->driver->beginTransaction();
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['rolled_back']);
        $this->driver->rollback();

        $row = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['rolled_back'])->fetch();
        $this->assertFalse($row);
    }

    public function testNestedTransactionRollbackDoesNotAffectOuter(): void
    {
        $this->driver->beginTransaction();
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['outer']);

        $this->driver->beginTransaction(); // SAVEPOINT sp_1
        $this->driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['inner']);
        $this->driver->rollback(); // ROLLBACK TO SAVEPOINT sp_1 — не трогает 'outer'

        $this->driver->commit(); // фиксирует внешнюю транзакцию

        $outer = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['outer'])->fetch();
        $inner = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['inner'])->fetch();

        $this->assertNotFalse($outer);
        $this->assertFalse($inner);
    }

    public function testTransactionHelperRollsBackOnException(): void
    {
        try {
            $this->driver->transaction(function (PdoDriver $driver) {
                $driver->query('INSERT INTO pdo_driver_test (name) VALUES (?)', ['should_rollback']);
                throw new \RuntimeException('boom');
            });
            $this->fail('Ожидалось RuntimeException');
        } catch (\RuntimeException) {
            // ожидаемо
        }

        $row = $this->driver->query('SELECT * FROM pdo_driver_test WHERE name = ?', ['should_rollback'])->fetch();
        $this->assertFalse($row);
    }

    public function testInTransaction(): void
    {
        $this->assertFalse($this->driver->inTransaction());
        $this->driver->beginTransaction();
        $this->assertTrue($this->driver->inTransaction());
        $this->driver->commit();
        $this->assertFalse($this->driver->inTransaction());
    }
}