<?php

declare(strict_types=1);

namespace App\Framework\Discovery\ValueObjects;

use App\Framework\Core\ValueObjects\Byte;
use App\Framework\Core\ValueObjects\ClassName;
use App\Framework\Core\ValueObjects\MethodName;
use App\Framework\Filesystem\ValueObjects\FilePath;
use Attribute;

/**
 * Represents a discovered attribute with all its metadata
 */
final readonly class DiscoveredAttribute
{
    /**
     * @param array<string, mixed> $arguments
     * @param array<string, mixed> $additionalData
     */
    public function __construct(
        public ClassName $className,
        public string $attributeClass,
        public AttributeTarget $target,
        public ?MethodName $methodName = null,
        public ?string $propertyName = null,
        public array $arguments = [],
        public ?FilePath $filePath = null,
        public array $additionalData = []
    ) {
    }

    public function isClassAttribute(): bool
    {
        return $this->target === AttributeTarget::TARGET_CLASS;
    }

    public function isMethodAttribute(): bool
    {
        return $this->target === AttributeTarget::METHOD;
    }

    public function isPropertyAttribute(): bool
    {
        return $this->target === AttributeTarget::PROPERTY;
    }

    /**
     * Create from legacy array format (for cache compatibility)
     * @param array<string, mixed> $data
     */
    public static function fromArray(array $data): self
    {
        // Handle both new DiscoveredAttribute format and old AttributeMapping format
        $classData = $data['class'] ?? $data['className'] ?? '';
        if (is_object($classData)) {
            // Check if it's a complete ClassName object or incomplete class
            if ($classData instanceof ClassName) {
                $className = $classData;
            } elseif (is_object($classData) && method_exists($classData, 'getFullyQualified')) {
                try {
                    $className = ClassName::create($classData->getFullyQualified());
                } catch (\Throwable) {
                    // Fallback: try to extract from object properties or use empty string
                    $className = ClassName::create('');
                }
            } else {
                // Incomplete class or other object - skip or use fallback
                $className = ClassName::create('');
            }
        } else {
            $className = ClassName::create($classData);
        }

        $attributeClass = $data['attribute_class'] ?? $data['attributeClass'] ?? $data['attribute'] ?? '';
        $target = AttributeTarget::from($data['target_type'] ?? $data['target'] ?? 'class');

        $methodName = null;
        $methodData = $data['method'] ?? $data['methodName'] ?? null;
        if ($methodData !== null) {
            if (is_object($methodData)) {
                // Check if it's a complete MethodName object
                if ($methodData instanceof MethodName) {
                    $methodName = $methodData;
                } elseif (method_exists($methodData, 'toString')) {
                    try {
                        $methodName = MethodName::create($methodData->toString());
                    } catch (\Throwable) {
                        $methodName = null;
                    }
                }
            } else {
                $methodName = MethodName::create($methodData);
            }
        }

        $filePath = null;
        $fileData = $data['file'] ?? $data['filePath'] ?? null;
        if (! empty($fileData)) {
            if (is_object($fileData)) {
                // Check if it's a complete FilePath object
                if ($fileData instanceof FilePath) {
                    $filePath = $fileData;
                } elseif (method_exists($fileData, 'toString')) {
                    try {
                        $filePath = FilePath::create($fileData->toString());
                    } catch (\Throwable) {
                        $filePath = null;
                    }
                }
            } else {
                $filePath = FilePath::create($fileData);
            }
        }

        $arguments = $data['arguments'] ?? [];
        $additionalData = $data;

        // Remove standard fields from additionalData
        unset($additionalData['class'], $additionalData['attribute'], $additionalData['attribute_class']);
        unset($additionalData['target'], $additionalData['target_type'], $additionalData['method']);
        unset($additionalData['file'], $additionalData['arguments']);

        return new self(
            className: $className,
            attributeClass: $attributeClass,
            target: $target,
            methodName: $methodName,
            propertyName: $data['property'] ?? null,
            arguments: $arguments,
            filePath: $filePath,
            additionalData: $additionalData
        );
    }

    /**
     * Get unique identifier for deduplication
     */
    public function getUniqueId(): string
    {
        $base = $this->className->getFullyQualified() . '::' . $this->attributeClass;

        if ($this->methodName !== null) {
            $base .= '::' . $this->methodName->toString();
        } elseif ($this->propertyName !== null) {
            $base .= '::$' . $this->propertyName;
        }

        return $base;
    }

    /**
     * Create an instance of the attribute class with the stored arguments
     */
    public function createAttributeInstance(): ?object
    {
        try {
            // Use PHP 8's named arguments with unpacking
            return new $this->attributeClass(...$this->arguments);
        } catch (\Throwable) {
            return null;
        }
    }

    /**
     * Get memory footprint estimate
     */
    public function getMemoryFootprint(): Byte
    {
        $bytes = strlen($this->className->getFullyQualified()) +
                 strlen($this->attributeClass) +
                 ($this->methodName ? strlen($this->methodName->toString()) : 0) +
                 ($this->propertyName ?? 0) +
                 ($this->filePath ? strlen($this->filePath->toString()) : 0) +
                 strlen($this->target->value) +
                 (count($this->arguments) * 50) + // Rough estimate
                 (count($this->additionalData) * 30); // Rough estimate

        return Byte::fromBytes($bytes);
    }

    /**
     * Convert to array for backwards compatibility
     * @deprecated Use object properties instead
     */
    public function toArray(): array
    {
        $classString = $this->className->getFullyQualified();

        $data = [
            'class' => $classString,
            'attribute_class' => $this->attributeClass,
            'target_type' => $this->target->value,
        ];

        if ($this->methodName !== null) {
            $data['method'] = $this->methodName->toString();
        }

        if ($this->propertyName !== null) {
            $data['property'] = $this->propertyName;
        }

        if (! empty($this->arguments)) {
            $data['arguments'] = $this->arguments;
        }

        if ($this->filePath !== null) {
            $data['file'] = $this->filePath->toString();
        }

        // Sanitize additionalData to prevent object references from overwriting our string conversions
        $sanitizedAdditionalData = [];
        foreach ($this->additionalData as $key => $value) {
            // Skip keys that we've already handled to prevent object overwrites
            if (in_array($key, ['class', 'method', 'property', 'file', 'attribute_class', 'target_type'], true)) {
                continue;
            }

            // Convert objects to strings or skip them
            if (is_object($value)) {
                if (method_exists($value, 'toString')) {
                    $sanitizedAdditionalData[$key] = $value->toString();
                } elseif (method_exists($value, '__toString')) {
                    $sanitizedAdditionalData[$key] = (string)$value;
                } elseif (method_exists($value, 'getFullyQualified')) {
                    $sanitizedAdditionalData[$key] = $value->getFullyQualified();
                } elseif ($value instanceof \BackedEnum) {
                    // Handle PHP backed enums (like Method::GET)
                    $sanitizedAdditionalData[$key] = $value->value;
                } elseif ($value instanceof \UnitEnum) {
                    // Handle PHP unit enums
                    $sanitizedAdditionalData[$key] = $value->name;
                }
            } else {
                $sanitizedAdditionalData[$key] = $value;
            }
        }

        return array_merge($data, $sanitizedAdditionalData);
    }
}