<?php

namespace App\Services;

use App\Models\AIDecision;
use App\Models\Article;
use App\Models\Feedback;
use App\Models\Ticket;

class AdminDashboardService
{
    public function stats(): array
    {
        return [
            'articles_count' => Article::query()->count(),
            'tickets_count' => Ticket::query()->count(),
            'decisions_count' => AIDecision::query()->count(),
            'feedback_accuracy' => $this->feedbackAccuracy(),
        ];
    }

    public function recentTickets(int $limit = 10)
    {
        return Ticket::query()->latest()->limit($limit)->get();
    }

    public function recentDecisions(int $limit = 10)
    {
        return AIDecision::query()->with(['ticket', 'article'])->latest()->limit($limit)->get();
    }

    private function feedbackAccuracy(): ?float
    {
        $total = Feedback::query()->count();
        if ($total === 0) {
            return null;
        }

        $correct = Feedback::query()->where('is_correct', true)->count();
        return round(($correct / $total) * 100, 2);
    }
}