<?php

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use App\Framework\Core\ValueObjects\ClassName;
use App\Framework\Discovery\Analysis\DependencyAnalyzer;
use App\Framework\Reflection\CachedReflectionProvider;

echo "=== Testing Dependency Graph Analysis System ===\n\n";

$reflectionProvider = new CachedReflectionProvider();

echo "1. Testing DependencyAnalyzer with sample framework classes:\n";

try {
    $analyzer = new DependencyAnalyzer($reflectionProvider);

    // Test with simpler, existing classes first
    $classesToAnalyze = [
        'App\\Framework\\Core\\ValueObjects\\ClassName',
        'App\\Framework\\Http\\Method',
        'App\\Framework\\Router\\ValueObjects\\RoutePath',
        'App\\Framework\\Router\\ValueObjects\\Placeholder',
    ];

    echo "   🔍 Analyzing classes: " . implode(', ', array_map(fn ($c) => basename(str_replace('\\', '/', $c)), $classesToAnalyze)) . "\n";

    $analysisResult = $analyzer->analyzeWithCircularDetection($classesToAnalyze);
    $graph = $analysisResult->getGraph();
    $statistics = $analysisResult->getStatistics();

    echo "   ✅ Analysis completed successfully\n";
    echo "   📊 Statistics:\n";
    echo "      • Total nodes: {$statistics['node_count']}\n";
    echo "      • Total edges: {$statistics['edge_count']}\n";
    echo "      • Circular dependencies: {$statistics['circular_dependencies']}\n";
    echo "      • Leaf nodes: {$statistics['leaf_nodes']}\n";
    echo "      • Root nodes: {$statistics['root_nodes']}\n";
    echo "      • Average complexity: {$statistics['average_complexity']}\n";
    echo "      • Max dependencies: {$statistics['max_dependency_count']}\n\n";

    echo "   📈 Type distribution:\n";
    foreach ($statistics['type_distribution'] as $type => $count) {
        echo "      • {$type}: {$count}\n";
    }
    echo "\n";

    if ($analysisResult->hasCircularDependencies()) {
        echo "   ⚠️  Circular dependencies found:\n";
        foreach ($analysisResult->getCircularDependencies() as $cycle) {
            echo "      • " . implode(' -> ', $cycle) . "\n";
        }
        echo "\n";
    } else {
        echo "   ✅ No circular dependencies found\n\n";
    }

} catch (\Throwable $e) {
    echo "   ❌ Error: {$e->getMessage()}\n\n";
}

echo "2. Testing specific class analysis (DefaultContainer):\n";

try {
    $containerClass = 'App\\Framework\\DI\\DefaultContainer';
    $analyzer = new DependencyAnalyzer($reflectionProvider);

    $analysisResult = $analyzer->analyzeWithCircularDetection([$containerClass]);
    $graph = $analysisResult->getGraph();

    $node = $graph->getNode(ClassName::create($containerClass));

    if ($node !== null) {
        echo "   ✅ DefaultContainer analysis:\n";
        echo "      • Type: {$node->getType()->value}\n";
        echo "      • Dependencies: {$node->getDependencyCount()}\n";
        echo "      • Dependents: {$node->getDependentCount()}\n";
        echo "      • Complexity score: " . round($node->getComplexityScore(), 2) . "\n";
        echo "      • Is leaf: " . ($node->isLeaf() ? 'Yes' : 'No') . "\n";
        echo "      • Is root: " . ($node->isRoot() ? 'Yes' : 'No') . "\n\n";

        if (! empty($node->getDependencies())) {
            echo "   📋 Dependencies:\n";
            foreach ($node->getDependencies() as $edge) {
                echo "      • {$edge->getTarget()->getShortName()} ({$edge->getRelation()->value}, weight: {$edge->getWeight()})\n";
            }
            echo "\n";
        }

        // Test dependency depth
        $depth = $graph->getDependencyDepth($node->getClassName());
        echo "   📏 Dependency depth: {$depth}\n\n";
    }

} catch (\Throwable $e) {
    echo "   ❌ Error: {$e->getMessage()}\n\n";
}

echo "3. Testing dependency recommendations:\n";

try {
    $analyzer = new DependencyAnalyzer($reflectionProvider);

    // Analyze a larger set of framework classes
    $frameworkClasses = [
        'App\\Framework\\DI\\DefaultContainer',
        'App\\Framework\\Router\\ValueObjects\\RoutePath',
        'App\\Framework\\Router\\ValueObjects\\RouteGroup',
        'App\\Framework\\TypeCaster\\TypeCasterRegistry',
        'App\\Framework\\Discovery\\UnifiedDiscoveryService',
        'App\\Framework\\Core\\Application',
        'App\\Framework\\Http\\Request',
        'App\\Framework\\Database\\EntityManager',
    ];

    $analysisResult = $analyzer->analyzeWithCircularDetection($frameworkClasses);
    $recommendations = $analyzer->getRecommendations($analysisResult->getGraph());

    echo "   📝 Recommendations:\n";

    if (isset($recommendations['high_complexity'])) {
        echo "      🔺 High Complexity Classes:\n";
        foreach ($recommendations['high_complexity'] as $item) {
            echo "         • {$item['class']}: {$item['current']} (expected max: {$item['expected_max']})\n";
            echo "           {$item['suggestion']}\n";
        }
        echo "\n";
    }

    if (isset($recommendations['high_dependencies'])) {
        echo "      🔗 High Dependency Classes:\n";
        foreach ($recommendations['high_dependencies'] as $item) {
            echo "         • {$item['class']}: {$item['dependency_count']} dependencies\n";
            echo "           {$item['suggestion']}\n";
        }
        echo "\n";
    }

    if (isset($recommendations['circular_dependencies'])) {
        echo "      🔄 Circular Dependencies:\n";
        echo "         • Count: {$recommendations['circular_dependencies']['count']}\n";
        echo "         • {$recommendations['circular_dependencies']['suggestion']}\n";
        foreach ($recommendations['circular_dependencies']['cycles'] as $cycle) {
            echo "           Cycle: " . implode(' -> ', $cycle) . "\n";
        }
        echo "\n";
    }

    if (isset($recommendations['potentially_unused'])) {
        echo "      🗑️  Potentially Unused Classes:\n";
        foreach ($recommendations['potentially_unused'] as $item) {
            echo "         • {$item['class']}: {$item['suggestion']}\n";
        }
        echo "\n";
    }

    if (empty($recommendations)) {
        echo "      ✅ No major issues found!\n\n";
    }

} catch (\Throwable $e) {
    echo "   ❌ Error: {$e->getMessage()}\n\n";
}

echo "4. Testing dependency path finding:\n";

try {
    $analyzer = new DependencyAnalyzer($reflectionProvider);

    $analysisResult = $analyzer->analyzeWithCircularDetection([
        'App\\Framework\\DI\\DefaultContainer',
        'App\\Framework\\Reflection\\ReflectionProvider',
        'App\\Framework\\Reflection\\CachedReflectionProvider',
    ]);

    $graph = $analysisResult->getGraph();

    $fromClass = ClassName::create('App\\Framework\\DI\\DefaultContainer');
    $toClass = ClassName::create('App\\Framework\\Reflection\\ReflectionProvider');

    $path = $graph->getDependencyPath($fromClass, $toClass);

    if ($path !== null) {
        echo "   ✅ Dependency path found:\n";
        echo "      📍 From: {$fromClass->getShortName()}\n";
        echo "      📍 To: {$toClass->getShortName()}\n";
        echo "      🛤️  Path: " . implode(' -> ', array_map(fn ($class) => basename(str_replace('\\', '/', $class)), $path)) . "\n";
        echo "      📏 Length: " . count($path) . "\n\n";
    } else {
        echo "   ℹ️  No dependency path found between DefaultContainer and ReflectionProvider\n\n";
    }

} catch (\Throwable $e) {
    echo "   ❌ Error: {$e->getMessage()}\n\n";
}

echo "5. Testing graph statistics and analysis:\n";

try {
    $analyzer = new DependencyAnalyzer($reflectionProvider);

    // Test with more comprehensive class set
    $allClasses = [
        'App\\Framework\\DI\\DefaultContainer',
        'App\\Framework\\Router\\ValueObjects\\RoutePath',
        'App\\Framework\\Router\\ValueObjects\\RouteGroup',
        'App\\Framework\\Router\\ValueObjects\\GroupRoute',
        'App\\Framework\\TypeCaster\\TypeCasterRegistry',
        'App\\Framework\\Core\\ValueObjects\\ClassName',
        'App\\Framework\\Http\\Method',
    ];

    $analysisResult = $analyzer->analyzeWithCircularDetection($allClasses);
    $graph = $analysisResult->getGraph();

    echo "   📊 Detailed Graph Analysis:\n";

    // Top complex nodes
    $topComplex = $graph->getHighestDependencyNodes(3);
    echo "      🔺 Most Complex Classes:\n";
    foreach ($topComplex as $node) {
        echo "         • {$node->getClassName()->getShortName()}: complexity {$node->getComplexityScore()}\n";
    }
    echo "\n";

    // Most used nodes
    $mostUsed = $graph->getMostUsedNodes(3);
    echo "      🌟 Most Used Classes:\n";
    foreach ($mostUsed as $node) {
        echo "         • {$node->getClassName()->getShortName()}: {$node->getDependentCount()} dependents\n";
    }
    echo "\n";

    // Leaf nodes
    $leafNodes = $graph->getLeafNodes();
    echo "      🍃 Leaf Nodes (no dependencies):\n";
    foreach (array_slice($leafNodes, 0, 5) as $node) {
        echo "         • {$node->getClassName()->getShortName()} ({$node->getType()->value})\n";
    }
    echo "\n";

    // Root nodes
    $rootNodes = $graph->getRootNodes();
    echo "      🌳 Root Nodes (no dependents):\n";
    foreach (array_slice($rootNodes, 0, 5) as $node) {
        echo "         • {$node->getClassName()->getShortName()} ({$node->getType()->value})\n";
    }
    echo "\n";

} catch (\Throwable $e) {
    echo "   ❌ Error: {$e->getMessage()}\n\n";
}

echo "=== Dependency Graph Analysis Test Completed ===\n";