<?php

namespace App\Services\Article;

use App\Models\Article;

class ValidationService
{
    public function __construct(
        private ArticleFetcher $articleFetcher
    ) {}

    public function validate(Article $article): Article
    {
        logger('Checking keywords for article: ' . $article->id);

        $articleData = $this->articleFetcher->fetchArticleData($article);
        
        // Update article with fetched metadata (title, description)
        $updateData = [];

        if (!empty($articleData)) {
            $updateData['title'] = $articleData['title'] ?? $article->title;
            $updateData['description'] = $articleData['description'] ?? $article->description;
            $updateData['content'] = $articleData['full_article'] ?? null;
        }
        
        if (!isset($articleData['full_article']) || empty($articleData['full_article'])) {
            logger()->warning('Article data missing full_article content', [
                'article_id' => $article->id,
                'url' => $article->url
            ]);
            
            $updateData['approval_status'] = 'rejected';
            $article->update($updateData);
            
            return $article->refresh();
        }
        
        // Validate using extracted content (not stored)
        $validationResult = $this->validateByKeywords($articleData['full_article']);
        $updateData['approval_status'] = $validationResult ? 'approved' : 'pending';

        $article->update($updateData);

        return $article->refresh();
    }

    private function validateByKeywords(string $full_article): bool
    {
        // Belgian news content keywords - broader set for Belgian news relevance
        $keywords = [
            // Political parties and leaders
            'N-VA', 'Bart De Wever', 'Frank Vandenbroucke', 'Alexander De Croo',
            'Vooruit', 'Open Vld', 'CD&V', 'Vlaams Belang', 'PTB', 'PVDA',
            
            // Belgian locations and institutions
            'Belgium', 'Belgian', 'Flanders', 'Flemish', 'Wallonia', 'Brussels',
            'Antwerp', 'Ghent', 'Bruges', 'Leuven', 'Mechelen', 'Namur', 'Liège', 'Charleroi',
            'parliament', 'government', 'minister', 'policy', 'law', 'legislation',
            
            // Common Belgian news topics
            'economy', 'economic', 'education', 'healthcare', 'transport', 'climate', 'energy',
            'European', 'EU', 'migration', 'security', 'justice', 'culture', 'police'
        ];

        foreach ($keywords as $keyword) {
            if (stripos($full_article, $keyword) !== false) {
                return true;
            }
        }

        return false;
    }
}