<?php

namespace App\Modules\Chatbot\Models;

use Illuminate\Database\Eloquent\Model;

class ChatbotKnowledge extends Model
{
    protected $table = 'chatbot_knowledge';

    protected $fillable = [
        'title',
        'content',
        'restrictions',
        'category',
        'active',
    ];

    protected $casts = [
        'active' => 'boolean',
    ];

    /**
     * Available categories for knowledge base entries.
     */
    public static function getCategories(): array
    {
        return [
            'company_info' => 'Informações da Empresa',
            'products' => 'Produtos',
            'services' => 'Serviços',
            'faq' => 'Perguntas Frequentes',
            'general' => 'Geral',
        ];
    }

    /**
     * Scope to get only active entries.
     */
    public function scopeActive($query)
    {
        return $query->where('active', true);
    }

    /**
     * Get all knowledge as a formatted text for the system prompt.
     */
    public static function getFormattedKnowledge(): string
    {
        $entries = self::active()->orderBy('category')->orderBy('title')->get();

        if ($entries->isEmpty()) {
            return '';
        }

        $grouped = $entries->groupBy('category');
        $categories = self::getCategories();
        $output = '';

        foreach ($grouped as $category => $items) {
            $label = $categories[$category] ?? $category;
            $output .= "\n## {$label}\n";
            foreach ($items as $item) {
                $output .= "- **{$item->title}**: {$item->content}\n";
                if ($item->restrictions) {
                    $output .= "  - ⚠️ Restrição: {$item->restrictions}\n";
                }
            }
        }

        return $output;
    }
}