<?php

namespace Tests\Unit;

use PHPUnit\Framework\Attributes\Test;
use Libs\Neuron;
use PDO;
use Tests\TestCase;

/**
 * BootstrapTest - DuckBrain test harness
 *
 * Prueba de humo de la infraestructura: autoload de composer + framework,
 * constantes de la DB de prueba y conexión PDO realmente utilizable. Si
 * algo del entorno está mal, esta prueba falla primero con el diagnóstico.
 */
final class BootstrapTest extends TestCase
{
    #[Test]
    public function frameworkClassesAreAutoloaded(): void
    {
        $this->assertTrue(
            class_exists(Neuron::class),
            'MISSING AUTOLOAD: autoload.php did not resolve Libs\Neuron; check ROOT_CORE and run from the project root'
        );

        $neuron = new Neuron(['key' => 'value']);
        $this->assertSame('value', $neuron->key);
        $this->assertNull($neuron->doesNotExist);
    }

    #[Test]

    public function databaseConstantsPointToInMemorySqlite(): void
    {
        $this->assertSame(
            'sqlite',
            DB_TYPE,
            'MISSING OVERRIDE: DB_TYPE comes from config.php; the bootstrap must define the DB_* constants BEFORE requiring autoload.php'
        );
        $this->assertSame(':memory:', DB_NAME, 'DB_NAME should be :memory: so tests never touch disks or servers');
    }

    #[Test]

    public function testDatabaseIsUsable(): void
    {
        $db = self::db();
        $this->assertInstanceOf(PDO::class, $db, 'Could not obtain the test PDO connection');
        $this->assertSame($db, self::db(), 'Database::getInstance should return the same singleton');

        $db->exec('CREATE TABLE smoke (id INTEGER PRIMARY KEY, v TEXT)');
        $db->prepare('INSERT INTO smoke (v) VALUES (?)')->execute(['quack']);
        $this->assertSame('quack', $db->query('SELECT v FROM smoke')->fetchColumn());
        $db->exec('DROP TABLE smoke');
    }
}