<?php

namespace Tests\Unit;

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

class PdoConnectionTest extends TestCase
{
    private PdoConnection $connection;

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

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

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

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

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

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

        try {
            $connection->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->connection->query('INSERT INTO pdo_connection_test (name) VALUES (?)', ['foo']);
        $row = $this->connection->query('SELECT * FROM pdo_connection_test WHERE name = ?', ['foo'])->fetch();

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

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

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

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

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

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

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

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

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

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

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

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

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

    public function testManualPrepareExecuteIsProfiledToo(): void
    {
        // Регрессия: профилирование должно ловить любой execute(), а не только PdoConnection::query() —
        // Repository сам делает $this->pdo->prepare()->execute() напрямую (см. get()/create()/...).
        Profiler::reset();

        $stmt = $this->connection->prepare('INSERT INTO pdo_connection_test (name) VALUES (?)');
        $stmt->execute(['foo']);

        $this->assertSame(1, Profiler::count());
    }

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

    public function testSqliteDialectConnectsAndQueries(): void
    {
        // dialect — не требует живой MariaDB (в отличие от остальных тестов класса, см. setUp()),
        // регрессия на DSN/подключение для диалекта, отличного от дефолтного mysql
        $connection = new PdoConnection(['dialect' => 'sqlite', 'dbname' => ':memory:']);
        $connection->exec('CREATE TABLE t (id INTEGER PRIMARY KEY, name TEXT)');
        $connection->query('INSERT INTO t (name) VALUES (?)', ['hello']);

        $row = $connection->query('SELECT * FROM t')->fetch();
        $this->assertSame('hello', $row['name']);

        $connection->beginTransaction();
        $connection->query('INSERT INTO t (name) VALUES (?)', ['rolled_back']);
        $connection->rollback();

        $count = $connection->query('SELECT COUNT(*) AS c FROM t')->fetch();
        $this->assertSame(1, (int) $count['c']);
    }
}