<?php

declare(strict_types=1);

namespace App\Tests\Service;

use App\Model\DomainConfig;
use App\Service\DomainConfigProvider;
use PHPUnit\Framework\TestCase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;

class DomainConfigProviderTest extends TestCase
{
    public function testReturnsConfigForExactMatch(): void
    {
        $provider = $this->createProvider([
            'example.com' => [
                'theme' => 'custom',
                'gtm_id' => 'GTM-123',
                'cmp_url' => 'https://cmp.example.com',
            ],
        ], 'example.com');

        $config = $provider->getConfig();

        $this->assertSame('custom', $config->theme);
        $this->assertSame('GTM-123', $config->gtmId);
        $this->assertSame('https://cmp.example.com', $config->cmpUrl);
    }

    public function testReturnsConfigForSubdomainMatch(): void
    {
        $provider = $this->createProvider([
            'example.com' => [
                'theme' => 'custom',
                'gtm_id' => 'GTM-456',
                'cmp_url' => 'https://cmp.example.com',
            ],
        ], 'www.example.com');

        $config = $provider->getConfig();

        $this->assertSame('custom', $config->theme);
        $this->assertSame('GTM-456', $config->gtmId);
    }

    public function testReturnsDefaultConfigForUnknownDomain(): void
    {
        $provider = $this->createProvider([
            'example.com' => [
                'theme' => 'custom',
                'gtm_id' => 'GTM-123',
                'cmp_url' => 'https://cmp.example.com',
            ],
        ], 'unknown.com');

        $config = $provider->getConfig();

        $this->assertSame(DomainConfig::DEFAULT_THEME, $config->theme);
        $this->assertSame('', $config->gtmId);
        $this->assertSame('', $config->cmpUrl);
    }

    public function testReturnsDefaultConfigWhenNoRequest(): void
    {
        $requestStack = new RequestStack();
        $provider = new DomainConfigProvider([], $requestStack);

        $config = $provider->getConfig();

        $this->assertSame(DomainConfig::DEFAULT_THEME, $config->theme);
    }

    public function testHandlesMissingConfigValues(): void
    {
        $provider = $this->createProvider([
            'example.com' => [
                'theme' => 'custom',
            ],
        ], 'example.com');

        $config = $provider->getConfig();

        $this->assertSame('custom', $config->theme);
        $this->assertSame('', $config->gtmId);
        $this->assertSame('', $config->cmpUrl);
    }

    public function testCachesConfigForSameHost(): void
    {
        $provider = $this->createProvider([
            'example.com' => [
                'theme' => 'custom',
                'gtm_id' => 'GTM-123',
                'cmp_url' => 'https://cmp.example.com',
            ],
        ], 'example.com');

        $config1 = $provider->getConfigForHost('example.com');
        $config2 = $provider->getConfigForHost('example.com');

        $this->assertSame($config1, $config2);
    }

    public function testFirstMatchWins(): void
    {
        // When a host matches multiple patterns, the first pattern in iteration order wins
        // Here 'deep.portal.example.com' matches both 'portal.example.com' (via subdomain)
        // and 'example.com' (via subdomain), but portal.example.com is checked first
        $provider = $this->createProvider([
            'portal.example.com' => ['theme' => 'portal'],
            'example.com' => ['theme' => 'main'],
        ], 'deep.portal.example.com');

        $config = $provider->getConfig();

        $this->assertSame('portal', $config->theme);
    }

    public function testCaseInsensitiveMatching(): void
    {
        $provider = $this->createProvider([
            'Example.COM' => [
                'theme' => 'custom',
            ],
        ], 'EXAMPLE.com');

        $config = $provider->getConfig();

        $this->assertSame('custom', $config->theme);
    }

    /**
     * @param array<string, array{theme?: string, gtm_id?: string, cmp_url?: string}> $domainConfig
     */
    private function createProvider(array $domainConfig, string $host): DomainConfigProvider
    {
        $request = Request::create('https://'.$host.'/');
        $requestStack = new RequestStack();
        $requestStack->push($request);

        return new DomainConfigProvider($domainConfig, $requestStack);
    }
}