<?php

declare(strict_types=1);

namespace DeskMoloni\Tests\Unit;

/**
 * Descomplicar® Crescimento Digital
 * https://descomplicar.pt
 */

use PHPUnit\Framework\TestCase;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\Attributes\Group;
use PHPUnit\Framework\Attributes\DataProvider;
use DeskMoloni\Tests\TestCase as DeskMoloniTestCase;
use stdClass;

/**
 * WebhookControllerTest
 * 
 * Unit tests for WebhookController class
 * Tests webhook handling, validation, and security
 * 
 * @package DeskMoloni\Tests\Unit
 * @author Development Helper
 * @version 1.0.0
 */
#[CoversClass('WebhookController')]
class WebhookControllerTest extends DeskMoloniTestCase
{
    private $webhook_controller;
    private $input_mock;
    private $security_mock;
    private $queue_processor_mock;
    
    protected function setUp(): void
    {
        parent::setUp();
        
        // Create mocks
        $this->input_mock = $this->createMock(stdClass::class);
        $this->security_mock = $this->createMock(stdClass::class);
        $this->queue_processor_mock = $this->createMock(stdClass::class);
        
        // Setup CI mock with required components
        $this->ci->input = $this->input_mock;
        $this->ci->security = $this->security_mock;
        $this->ci->output = $this->createMock(stdClass::class);
        $this->ci->load = $this->createMock(stdClass::class);
        
        // Mock function_exists for validation
        if (!function_exists('is_cli')) {
            function is_cli() {
                return false;
            }
        }
        
        // Load WebhookController
        require_once 'modules/desk_moloni/controllers/WebhookController.php';
        $this->webhook_controller = new WebhookController();
    }
    
    #[Test]
    #[Group('unit')]
    public function testControllerInitialization(): void
    {
        $this->assertInstanceOf(WebhookController::class, $this->webhook_controller);
    }
    
    #[Test]
    #[Group('unit')]
    public function testValidWebhookSignature(): void
    {
        $payload = json_encode([
            'entity_type' => 'customer',
            'entity_id' => '123',
            'action' => 'update',
            'timestamp' => time()
        ]);
        
        $secret = 'webhook_secret_key';
        $signature = hash_hmac('sha256', $payload, $secret);
        
        // Mock input for webhook data
        $this->input_mock
            ->expects($this->once())
            ->method('raw_input_stream')
            ->willReturn($payload);
            
        $this->input_mock
            ->expects($this->once())
            ->method('get_request_header')
            ->with('X-Moloni-Signature')
            ->willReturn('sha256=' . $signature);
        
        // Mock security XSS clean
        $this->security_mock
            ->expects($this->once())
            ->method('xss_clean')
            ->willReturn(json_decode($payload, true));
        
        // Mock successful queue addition
        $this->queue_processor_mock
            ->expects($this->once())
            ->method('add_to_queue')
            ->willReturn('job_12345');
        
        // Mock output
        $this->ci->output
            ->expects($this->once())
            ->method('set_content_type')
            ->with('application/json');
            
        $this->ci->output
            ->expects($this->once())
            ->method('set_output');
        
        // Execute webhook
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        // Assertions are handled through mock expectations
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testInvalidWebhookSignature(): void
    {
        $payload = json_encode([
            'entity_type' => 'customer',
            'entity_id' => '123',
            'action' => 'update'
        ]);
        
        $invalid_signature = 'sha256=invalid_signature_hash';
        
        // Mock input
        $this->input_mock
            ->expects($this->once())
            ->method('raw_input_stream')
            ->willReturn($payload);
            
        $this->input_mock
            ->expects($this->once())
            ->method('get_request_header')
            ->with('X-Moloni-Signature')
            ->willReturn($invalid_signature);
        
        // Mock output with 401 status
        $this->ci->output
            ->expects($this->once())
            ->method('set_status_header')
            ->with(401);
            
        $this->ci->output
            ->expects($this->once())
            ->method('set_content_type')
            ->with('application/json');
        
        // Should not add to queue with invalid signature
        $this->queue_processor_mock
            ->expects($this->never())
            ->method('add_to_queue');
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testMissingWebhookSignature(): void
    {
        $payload = json_encode([
            'entity_type' => 'customer',
            'entity_id' => '123'
        ]);
        
        // Mock input without signature
        $this->input_mock
            ->expects($this->once())
            ->method('raw_input_stream')
            ->willReturn($payload);
            
        $this->input_mock
            ->expects($this->once())
            ->method('get_request_header')
            ->with('X-Moloni-Signature')
            ->willReturn(null);
        
        // Should return 401 Unauthorized
        $this->ci->output
            ->expects($this->once())
            ->method('set_status_header')
            ->with(401);
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    #[DataProvider('webhookPayloadProvider')]
    public function testWebhookPayloadValidation(array $payload, bool $should_be_valid): void
    {
        $json_payload = json_encode($payload);
        $secret = 'test_secret';
        $signature = hash_hmac('sha256', $json_payload, $secret);
        
        // Mock input
        $this->input_mock
            ->expects($this->once())
            ->method('raw_input_stream')
            ->willReturn($json_payload);
            
        $this->input_mock
            ->expects($this->once())
            ->method('get_request_header')
            ->willReturn('sha256=' . $signature);
        
        $this->security_mock
            ->expects($this->once())
            ->method('xss_clean')
            ->willReturn($payload);
        
        if ($should_be_valid) {
            // Should process valid payload
            $this->queue_processor_mock
                ->expects($this->once())
                ->method('add_to_queue')
                ->willReturn('job_id');
                
            $this->ci->output
                ->expects($this->once())
                ->method('set_status_header')
                ->with(200);
        } else {
            // Should reject invalid payload
            $this->queue_processor_mock
                ->expects($this->never())
                ->method('add_to_queue');
                
            $this->ci->output
                ->expects($this->once())
                ->method('set_status_header')
                ->with(400);
        }
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    public static function webhookPayloadProvider(): array
    {
        return [
            'Valid customer payload' => [
                [
                    'entity_type' => 'customer',
                    'entity_id' => '123',
                    'action' => 'update',
                    'timestamp' => time(),
                    'data' => ['name' => 'Updated Customer']
                ],
                true
            ],
            'Valid invoice payload' => [
                [
                    'entity_type' => 'invoice',
                    'entity_id' => '456',
                    'action' => 'create',
                    'timestamp' => time(),
                    'data' => ['number' => 'INV-001']
                ],
                true
            ],
            'Missing entity_type' => [
                [
                    'entity_id' => '123',
                    'action' => 'update'
                ],
                false
            ],
            'Missing entity_id' => [
                [
                    'entity_type' => 'customer',
                    'action' => 'update'
                ],
                false
            ],
            'Invalid entity_type' => [
                [
                    'entity_type' => 'invalid_entity',
                    'entity_id' => '123',
                    'action' => 'update'
                ],
                false
            ],
            'Invalid action' => [
                [
                    'entity_type' => 'customer',
                    'entity_id' => '123',
                    'action' => 'invalid_action'
                ],
                false
            ]
        ];
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookRateLimit(): void
    {
        // Mock multiple rapid requests from same IP
        $payload = json_encode([
            'entity_type' => 'customer',
            'entity_id' => '123',
            'action' => 'update'
        ]);
        
        $signature = hash_hmac('sha256', $payload, 'secret');
        
        // Setup input mocks for multiple calls
        $this->input_mock
            ->method('raw_input_stream')
            ->willReturn($payload);
            
        $this->input_mock
            ->method('get_request_header')
            ->willReturn('sha256=' . $signature);
            
        $this->input_mock
            ->method('ip_address')
            ->willReturn('192.168.1.100');
        
        $this->security_mock
            ->method('xss_clean')
            ->willReturn(json_decode($payload, true));
        
        // First request should succeed
        $this->queue_processor_mock
            ->expects($this->once())
            ->method('add_to_queue')
            ->willReturn('job_1');
        
        // Subsequent requests should be rate limited (if implemented)
        if (method_exists($this->webhook_controller, 'check_rate_limit')) {
            $this->ci->output
                ->expects($this->once())
                ->method('set_status_header')
                ->with(429); // Too Many Requests
        }
        
        // Execute first webhook
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookIdempotency(): void
    {
        // Test that duplicate webhooks are handled correctly
        $payload = [
            'entity_type' => 'customer',
            'entity_id' => '123',
            'action' => 'update',
            'timestamp' => time(),
            'idempotency_key' => 'unique_webhook_123'
        ];
        
        $json_payload = json_encode($payload);
        $signature = hash_hmac('sha256', $json_payload, 'secret');
        
        $this->input_mock
            ->method('raw_input_stream')
            ->willReturn($json_payload);
            
        $this->input_mock
            ->method('get_request_header')
            ->willReturn('sha256=' . $signature);
        
        $this->security_mock
            ->method('xss_clean')
            ->willReturn($payload);
        
        // First webhook should be processed
        $this->queue_processor_mock
            ->expects($this->once())
            ->method('add_to_queue')
            ->willReturn('job_1');
        
        // If idempotency is implemented, duplicate should be ignored
        if (method_exists($this->webhook_controller, 'is_duplicate_webhook')) {
            $this->ci->output
                ->expects($this->once())
                ->method('set_status_header')
                ->with(200); // OK but not processed
        }
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookLogging(): void
    {
        $payload = [
            'entity_type' => 'customer',
            'entity_id' => '456',
            'action' => 'delete'
        ];
        
        $json_payload = json_encode($payload);
        $signature = hash_hmac('sha256', $json_payload, 'secret');
        
        $this->input_mock
            ->method('raw_input_stream')
            ->willReturn($json_payload);
            
        $this->input_mock
            ->method('get_request_header')
            ->willReturn('sha256=' . $signature);
        
        $this->security_mock
            ->method('xss_clean')
            ->willReturn($payload);
        
        // Mock webhook logging if available
        if (method_exists($this->webhook_controller, 'log_webhook')) {
            // Should log webhook receipt and processing
            $this->assertTrue(true);
        } else {
            $this->markTestSkipped('Webhook logging not implemented');
        }
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookErrorHandling(): void
    {
        $payload = json_encode([
            'entity_type' => 'customer',
            'entity_id' => '789',
            'action' => 'update'
        ]);
        
        $signature = hash_hmac('sha256', $payload, 'secret');
        
        $this->input_mock
            ->method('raw_input_stream')
            ->willReturn($payload);
            
        $this->input_mock
            ->method('get_request_header')
            ->willReturn('sha256=' . $signature);
        
        $this->security_mock
            ->method('xss_clean')
            ->willReturn(json_decode($payload, true));
        
        // Mock queue failure
        $this->queue_processor_mock
            ->expects($this->once())
            ->method('add_to_queue')
            ->willReturn(false);
        
        // Should handle queue failure gracefully
        $this->ci->output
            ->expects($this->once())
            ->method('set_status_header')
            ->with(500);
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookMetrics(): void
    {
        if (!method_exists($this->webhook_controller, 'get_webhook_metrics')) {
            $this->markTestSkipped('Webhook metrics not implemented');
        }
        
        $metrics = $this->webhook_controller->get_webhook_metrics();
        
        $this->assertIsArray($metrics);
        $this->assertArrayHasKey('total_received', $metrics);
        $this->assertArrayHasKey('total_processed', $metrics);
        $this->assertArrayHasKey('total_errors', $metrics);
        $this->assertArrayHasKey('by_entity_type', $metrics);
        $this->assertArrayHasKey('by_action', $metrics);
        $this->assertArrayHasKey('success_rate', $metrics);
    }
    
    #[Test]
    #[Group('unit')]
    public function testWebhookSecurity(): void
    {
        // Test various security scenarios
        
        // 1. Request from unauthorized IP (if IP whitelist implemented)
        $this->input_mock
            ->method('ip_address')
            ->willReturn('192.168.999.999');
        
        if (method_exists($this->webhook_controller, 'is_ip_whitelisted')) {
            $this->ci->output
                ->expects($this->once())
                ->method('set_status_header')
                ->with(403);
        }
        
        // 2. Request with suspicious user agent
        $this->input_mock
            ->method('user_agent')
            ->willReturn('SuspiciousBot/1.0');
        
        // 3. Request with malformed JSON
        $this->input_mock
            ->method('raw_input_stream')
            ->willReturn('{"invalid": json}');
        
        $this->ci->output
            ->expects($this->once())
            ->method('set_status_header')
            ->with(400);
        
        ob_start();
        $this->webhook_controller->moloni();
        ob_end_clean();
        
        $this->assertTrue(true);
    }
    
    protected function tearDown(): void
    {
        $this->webhook_controller = null;
        $this->input_mock = null;
        $this->security_mock = null;
        $this->queue_processor_mock = null;
        
        parent::tearDown();
    }
}