<?php

declare(strict_types=1);

namespace App\Services\Moderation;

use App\Models\Artwork;
use App\Models\User;

final class ArtworkUploadPolicy
{
    /** @return array{requires_review: bool, reasons: array<int, string>, approved_uploads: int} */
    public function assess(User $user, ?Artwork $artwork = null): array
    {
        if ($user->isAdmin()) {
            return ['requires_review' => false, 'reasons' => [], 'approved_uploads' => PHP_INT_MAX];
        }

        $approvedUploads = $this->approvedArtworkCount($user, $artwork);
        $minimumApproved = max(1, (int) config('uploads.moderation.minimum_approved_uploads', 5));

        $reasons = [];

        if ($approvedUploads < $minimumApproved) {
            $reasons[] = 'insufficient_approved_uploads';

            if ($user->email_verified_at === null) {
                $reasons[] = 'email_not_verified';
            }

            $minimumAgeDays = max(0, (int) config('uploads.moderation.minimum_account_age_days', 7));
            if ($user->created_at?->gt(now()->subDays($minimumAgeDays))) {
                $reasons[] = 'new_account';
            }

            if ((int) ($user->level ?? 1) <= (int) config('uploads.moderation.maximum_untrusted_level', 1)) {
                $reasons[] = 'low_level';
            }

            if ((int) ($user->bot_risk_score ?? 0) >= (int) config('uploads.moderation.bot_risk_review_threshold', 40)) {
                $reasons[] = 'bot_risk';
            }

            if ((int) ($user->spam_reports ?? 0) > 0) {
                $reasons[] = 'spam_reports';
            }
        }

        if ($artwork && $this->looksPromotional($artwork)) {
            $reasons[] = 'promotional_content';
        }

        return [
            'requires_review' => $reasons !== [],
            'reasons' => array_values(array_unique($reasons)),
            'approved_uploads' => $approvedUploads,
        ];
    }

    private function approvedArtworkCount(User $user, ?Artwork $artwork): int
    {
        $query = $user->artworks()
            ->where('is_approved', true)
            ->whereNotNull('published_at')
            ->where(function ($status): void {
                $status->whereNull('artwork_status')
                    ->orWhereNotIn('artwork_status', ['review', 'rejected', 'scheduled', 'draft']);
            })
            ->where(function ($source): void {
                $source->whereNull('approval_source')
                    ->orWhere('approval_source', 'moderator');
            });

        if ($artwork?->exists) {
            $query->whereKeyNot($artwork->getKey());
        }

        return (int) $query->count();
    }

    private function looksPromotional(Artwork $artwork): bool
    {
        $text = strtolower(implode(' ', [
            (string) $artwork->title,
            (string) $artwork->description,
            (string) $artwork->file_name,
        ]));

        foreach ((array) config('uploads.moderation.promotional_patterns', []) as $pattern) {
            if ($pattern !== '' && str_contains($text, strtolower((string) $pattern))) {
                return true;
            }
        }

        return (bool) preg_match('/(?:https?:\/\/|www\.|\b[a-z0-9-]+\.(?:com|net|org|io|co)\b)/i', $text);
    }
}