<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\Collection;

class CollectionQualityService
{
    public function sync(Collection $collection): Collection
    {
        $scores = $this->scores($collection->fresh());

        $collection->forceFill($scores)->save();

        return $collection->fresh();
    }

    public function scores(Collection $collection): array
    {
        $quality = 0.0;
        $ranking = 0.0;

        $titleLength = mb_strlen(trim((string) $collection->title));
        $descriptionLength = mb_strlen(trim((string) ($collection->description ?? '')));
        $summaryLength = mb_strlen(trim((string) ($collection->summary ?? '')));
        $artworksCount = (int) $collection->artworks_count;
        $engagement = ((int) $collection->likes_count * 1.6)
            + ((int) $collection->followers_count * 2.2)
            + ((int) $collection->saves_count * 2.4)
            + ((int) $collection->comments_count * 1.2)
            + ((int) $collection->shares_count * 1.8);

        $quality += $titleLength >= 12 ? 12 : ($titleLength >= 6 ? 6 : 0);
        $quality += $descriptionLength >= 120 ? 12 : ($descriptionLength >= 60 ? 6 : 0);
        $quality += $summaryLength >= 60 ? 8 : ($summaryLength >= 20 ? 4 : 0);
        $quality += $collection->resolvedCoverArtwork(false) ? 14 : 0;
        $quality += min(24, $artworksCount * 2);
        $quality += $collection->type === Collection::TYPE_EDITORIAL ? 6 : 0;
        $quality += $collection->type === Collection::TYPE_COMMUNITY ? 4 : 0;
        $quality += $collection->isCollaborative() ? min(6, (int) $collection->collaborators_count) : 0;
        $quality += filled($collection->event_key) || filled($collection->season_key) || filled($collection->campaign_key) ? 4 : 0;
        $quality += $collection->usesPremiumPresentation() ? 5 : 0;
        $quality += $collection->moderation_status === Collection::MODERATION_ACTIVE ? 5 : -8;
        $quality = max(0.0, min(100.0, $quality));

        $recencyBoost = 0.0;
        if ($collection->last_activity_at) {
            $days = max(0, now()->diffInDays($collection->last_activity_at));
            $recencyBoost = max(0.0, 12.0 - min(12.0, $days * 0.4));
        }

        $ranking = min(150.0, $quality + $recencyBoost + min(38.0, $engagement / 25));

        return [
            'quality_score' => round($quality, 2),
            'ranking_score' => round($ranking, 2),
        ];
    }
}