<?php

namespace Tests\Unit;

use PHPUnit\Framework\TestCase;
use Acme\Dhl\Services\ShippingService;
use ReflectionClass;
use ReflectionMethod;

/**
 * Test cases for German address parsing functionality
 */
class AddressParserTest extends TestCase
{
    private ShippingService $shippingService;
    private ReflectionMethod $parseMethod;

    protected function setUp(): void
    {
        parent::setUp();
        
        // Mock DhlClient for testing
        $mockClient = $this->createMock(\Acme\Dhl\Support\DhlClient::class);
        $this->shippingService = new ShippingService($mockClient);
        
        // Make private method accessible for testing
        $reflection = new ReflectionClass($this->shippingService);
        $this->parseMethod = $reflection->getMethod('parseGermanAddress');
        $this->parseMethod->setAccessible(true);
    }

    /**
     * Test standard German address formats
     */
    public function testStandardGermanAddresses(): void
    {
        $testCases = [
            // Basic format: Street + Number
            'Musterstraße 123' => ['street' => 'Musterstraße', 'houseNumber' => '123'],
            'Hauptstraße 1' => ['street' => 'Hauptstraße', 'houseNumber' => '1'],
            
            // With letter suffix
            'Bahnhofstraße 45a' => ['street' => 'Bahnhofstraße', 'houseNumber' => '45a'],
            'Kirchgasse 12B' => ['street' => 'Kirchgasse', 'houseNumber' => '12B'],
            
            // Multi-word street names
            'Am Markt 7' => ['street' => 'Am Markt', 'houseNumber' => '7'],
            'An der Kirche 23' => ['street' => 'An der Kirche', 'houseNumber' => '23'],
            'Karl-Marx-Straße 156' => ['street' => 'Karl-Marx-Straße', 'houseNumber' => '156'],
            
            // Range numbers
            'Lindenstraße 1-3' => ['street' => 'Lindenstraße', 'houseNumber' => '1-3'],
            'Gartenweg 12/14' => ['street' => 'Gartenweg', 'houseNumber' => '12/14'],
            
            // With abbreviations
            'Muster Str. 99' => ['street' => 'Muster Str.', 'houseNumber' => '99'],
            'Berliner Pl. 5' => ['street' => 'Berliner Pl.', 'houseNumber' => '5'],
        ];

        foreach ($testCases as $input => $expected) {
            $result = $this->parseMethod->invoke($this->shippingService, $input);
            
            $this->assertEquals($expected['street'], $result['street'], "Failed parsing street for: {$input}");
            $this->assertEquals($expected['houseNumber'], $result['houseNumber'], "Failed parsing house number for: {$input}");
        }
    }

    /**
     * Test edge cases and problematic addresses
     */
    public function testEdgeCases(): void
    {
        $edgeCases = [
            // No house number - should return null for houseNumber
            'Musterstraße' => ['street' => 'Musterstraße', 'houseNumber' => null],
            'Am Markt' => ['street' => 'Am Markt', 'houseNumber' => null],
            
            // Empty string
            '' => ['street' => '', 'houseNumber' => null],
            
            // Only number
            '123' => ['street' => '123', 'houseNumber' => null],
            
            // Multiple spaces
            'Muster   Straße   123' => ['street' => 'Muster   Straße', 'houseNumber' => '123'],
        ];

        foreach ($edgeCases as $input => $expected) {
            $result = $this->parseMethod->invoke($this->shippingService, $input);
            
            $this->assertEquals($expected['street'], $result['street'], "Failed parsing street for edge case: {$input}");
            $this->assertEquals($expected['houseNumber'], $result['houseNumber'], "Failed parsing house number for edge case: {$input}");
        }
    }

    /**
     * Test international addresses (should not be parsed)
     */
    public function testInternationalAddresses(): void
    {
        $internationalCases = [
            // English-style addresses
            '123 Main Street' => ['street' => '123 Main Street', 'houseNumber' => null],
            '456 Oak Avenue' => ['street' => '456 Oak Avenue', 'houseNumber' => null],
        ];

        foreach ($internationalCases as $input => $expected) {
            $result = $this->parseMethod->invoke($this->shippingService, $input);
            
            $this->assertEquals($expected['street'], $result['street'], "International address should not be parsed: {$input}");
            $this->assertEquals($expected['houseNumber'], $result['houseNumber'], "International address should have null house number: {$input}");
        }
    }
}