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

<?php

/**
 * Contract Test: Moloni OAuth API (Standalone)
 * 
 * Tests the OAuth 2.0 integration contract with Moloni API
 * These tests MUST FAIL initially (TDD) before implementing the OAuth library
 * 
 * @package    DeskMoloni
 * @subpackage Tests\Contract
 * @version    3.0.0
 * @author     Descomplicar®
 */

// Define constants for testing
define('BASEPATH', true);
define('ENVIRONMENT', 'testing');

echo "\n" . str_repeat("=", 80) . "\n";
echo "MOLONI OAUTH API CONTRACT TESTS (Standalone)\n";
echo "TDD: These tests MUST FAIL before implementation\n";
echo str_repeat("=", 80) . "\n\n";

$test_results = [];
$start_time = microtime(true);

// Test 1: OAuth Library File Existence
echo "1. 🧪 Testing OAuth Library File Existence...\n";
$oauth_file = __DIR__ . '/../../libraries/Moloni_oauth.php';

if (file_exists($oauth_file)) {
    echo "   ✅ Moloni_oauth.php file exists\n";
    
    // Test class definition
    $content = file_get_contents($oauth_file);
    if (strpos($content, 'class Moloni_oauth') !== false) {
        echo "   ✅ Moloni_oauth class is defined\n";
        $test_results['class_exists'] = true;
    } else {
        echo "   ❌ EXPECTED FAILURE: Moloni_oauth class not found\n";
        $test_results['class_exists'] = false;
    }
} else {
    echo "   ❌ EXPECTED FAILURE: Moloni_oauth.php file does not exist\n";
    echo "   📝 TODO: Create libraries/Moloni_oauth.php\n";
    $test_results['file_exists'] = false;
}

// Test 2: Required Methods Contract
echo "\n2. 🧪 Testing Required Methods Contract...\n";

$required_methods = [
    'configure',
    'get_authorization_url', 
    'handle_callback',
    'save_tokens',
    'get_access_token',
    'is_token_valid',
    'refresh_access_token',
    'get_auth_headers',
    'get_last_error',
    'supports_pkce',
    'validate_state',
    'are_tokens_encrypted'
];

if (file_exists($oauth_file)) {
    $content = file_get_contents($oauth_file);
    $methods_found = 0;
    
    foreach ($required_methods as $method) {
        if (strpos($content, "function {$method}") !== false || 
            strpos($content, "function {$method}(") !== false) {
            echo "   ✅ Method {$method}() found\n";
            $methods_found++;
        } else {
            echo "   ❌ Method {$method}() missing\n";
        }
    }
    
    $test_results['methods_complete'] = ($methods_found === count($required_methods));
    echo "   📊 Methods found: {$methods_found}/" . count($required_methods) . "\n";
    
} else {
    echo "   ❌ Cannot test methods - file does not exist\n";
    $test_results['methods_complete'] = false;
}

// Test 3: OAuth Endpoints Configuration
echo "\n3. 🧪 Testing OAuth Endpoints Configuration...\n";

$expected_endpoints = [
    'auth_url' => 'https://www.moloni.pt',
    'token_url' => 'https://api.moloni.pt'
];

if (file_exists($oauth_file)) {
    $content = file_get_contents($oauth_file);
    $endpoints_found = 0;
    
    foreach ($expected_endpoints as $endpoint => $domain) {
        if (strpos($content, $domain) !== false) {
            echo "   ✅ {$endpoint} contains correct domain: {$domain}\n";
            $endpoints_found++;
        } else {
            echo "   ❌ {$endpoint} missing or incorrect domain\n";
        }
    }
    
    $test_results['endpoints_configured'] = ($endpoints_found === count($expected_endpoints));
    
} else {
    echo "   ❌ Cannot test endpoints - file does not exist\n";
    $test_results['endpoints_configured'] = false;
}

// Test 4: Security Features Contract
echo "\n4. 🧪 Testing Security Features Contract...\n";

$security_features = [
    'PKCE' => ['pkce', 'code_verifier', 'code_challenge'],
    'State validation' => ['state', 'csrf'],
    'Token encryption' => ['encrypt', 'decrypt', 'token_manager'],
    'Rate limiting' => ['rate_limit', 'throttle', 'request_count']
];

if (file_exists($oauth_file)) {
    $content = file_get_contents($oauth_file);
    $security_score = 0;
    
    foreach ($security_features as $feature => $keywords) {
        $feature_found = false;
        foreach ($keywords as $keyword) {
            if (stripos($content, $keyword) !== false) {
                $feature_found = true;
                break;
            }
        }
        
        if ($feature_found) {
            echo "   ✅ {$feature} implementation found\n";
            $security_score++;
        } else {
            echo "   ❌ {$feature} implementation missing\n";
        }
    }
    
    $test_results['security_features'] = ($security_score >= 3);
    echo "   📊 Security features: {$security_score}/" . count($security_features) . "\n";
    
} else {
    echo "   ❌ Cannot test security features - file does not exist\n";
    $test_results['security_features'] = false;
}

// Test 5: Database Integration Contract
echo "\n5. 🧪 Testing Database Integration Contract...\n";

$config_model_file = __DIR__ . '/../../models/Desk_moloni_config_model.php';

if (file_exists($config_model_file)) {
    echo "   ✅ Config model exists for OAuth storage\n";
    
    $content = file_get_contents($config_model_file);
    if (strpos($content, 'oauth') !== false) {
        echo "   ✅ Config model supports OAuth settings\n";
        $test_results['database_integration'] = true;
    } else {
        echo "   ⚠️ Config model may not support OAuth settings\n";
        $test_results['database_integration'] = false;
    }
} else {
    echo "   ❌ Config model missing for OAuth storage\n";
    $test_results['database_integration'] = false;
}

// Test 6: Token Manager Integration
echo "\n6. 🧪 Testing Token Manager Integration...\n";

$token_manager_file = __DIR__ . '/../../libraries/TokenManager.php';

if (file_exists($token_manager_file)) {
    echo "   ✅ TokenManager library exists\n";
    
    $content = file_get_contents($token_manager_file);
    if (strpos($content, 'save_tokens') !== false || 
        strpos($content, 'get_token') !== false) {
        echo "   ✅ TokenManager has token management methods\n";
        $test_results['token_manager_integration'] = true;
    } else {
        echo "   ❌ TokenManager missing required methods\n";
        $test_results['token_manager_integration'] = false;
    }
} else {
    echo "   ❌ TokenManager library missing\n";
    $test_results['token_manager_integration'] = false;
}

// Generate Final Report
$execution_time = microtime(true) - $start_time;

echo "\n" . str_repeat("=", 80) . "\n";
echo "MOLONI OAUTH CONTRACT TEST REPORT\n";
echo str_repeat("=", 80) . "\n";

$passed_tests = array_filter($test_results, function($result) {
    return $result === true;
});

$failed_tests = array_filter($test_results, function($result) {
    return $result === false;
});

echo "Execution Time: " . number_format($execution_time, 2) . "s\n";
echo "Tests Passed: " . count($passed_tests) . "\n";
echo "Tests Failed: " . count($failed_tests) . " (EXPECTED in TDD)\n";

if (count($failed_tests) > 0) {
    echo "\n🔴 TDD STATUS: TESTS FAILING AS EXPECTED\n";
    echo "Next Step: Implement Moloni_oauth library to make tests pass\n";
    
    echo "\nFailed Test Categories:\n";
    foreach ($test_results as $test => $result) {
        if ($result === false) {
            echo "   ❌ " . ucwords(str_replace('_', ' ', $test)) . "\n";
        }
    }
} else {
    echo "\n🟢 ALL TESTS PASSING\n";
    echo "OAuth implementation appears to be complete\n";
}

echo "\n📋 IMPLEMENTATION REQUIREMENTS:\n";
echo "   1. Create libraries/Moloni_oauth.php with class Moloni_oauth\n";
echo "   2. Implement all required methods listed above\n";
echo "   3. Support OAuth 2.0 with PKCE for security\n";
echo "   4. Integrate with TokenManager for secure storage\n";
echo "   5. Use Config model for persistent settings\n";
echo "   6. Implement comprehensive error handling\n";
echo "   7. Add rate limiting and security features\n";

echo "\n🎯 SUCCESS CRITERIA:\n";
echo "   - All contract tests must pass\n";
echo "   - OAuth flow must work with real Moloni API\n";
echo "   - Tokens must be securely encrypted\n";
echo "   - PKCE must be implemented for security\n";
echo "   - Proper error handling and logging\n";

// Save results
$reports_dir = __DIR__ . '/../reports';
if (!is_dir($reports_dir)) {
    mkdir($reports_dir, 0755, true);
}

$report_file = $reports_dir . '/oauth_contract_test_' . date('Y-m-d_H-i-s') . '.json';
file_put_contents($report_file, json_encode([
    'timestamp' => date('Y-m-d H:i:s'),
    'test_type' => 'oauth_contract_standalone',
    'status' => count($failed_tests) > 0 ? 'failing' : 'passing',
    'results' => $test_results,
    'execution_time' => $execution_time,
    'tdd_status' => 'Tests failing as expected - ready for implementation'
], JSON_PRETTY_PRINT));

echo "\n📄 Contract test results saved to: {$report_file}\n";
echo str_repeat("=", 80) . "\n";