<?php

namespace App\Services\Link;

use App\Models\ShortLink;
use App\Models\User;
use App\Support\LadillLink;
use Illuminate\Support\Facades\DB;

/**
 * Mirrors platform-wide ladl.link slugs into the local catalog for unified listing.
 */
class LinkCatalogSyncService
{
    public function __construct(
        private PlatformLinkCatalogClient $catalog,
    ) {}

    public function syncForUser(User $user): void
    {
        $remote = $this->catalog->linksForUser((string) $user->public_id);
        $remoteSlugs = collect($remote)->pluck('slug')->filter()->all();

        DB::transaction(function () use ($user, $remote, $remoteSlugs): void {
            foreach ($remote as $row) {
                $slug = (string) ($row['slug'] ?? '');
                if ($slug === '') {
                    continue;
                }

                if (ShortLink::query()
                    ->where('slug', $slug)
                    ->where('is_managed_here', true)
                    ->exists()) {
                    continue;
                }

                ShortLink::query()->updateOrCreate(
                    ['slug' => $slug],
                    [
                        'user_id' => $user->id,
                        'label' => $row['label'] ?? null,
                        'destination_url' => (string) ($row['destination_summary'] ?? $row['destination_url'] ?? LadillLink::url($slug)),
                        'source_app' => (string) ($row['source_app'] ?? 'platform'),
                        'source_kind' => (string) ($row['source_kind'] ?? 'qr'),
                        'source_ref' => isset($row['source_ref']) ? (string) $row['source_ref'] : null,
                        'manage_url' => $row['manage_url'] ?? null,
                        'is_managed_here' => false,
                        'is_active' => (bool) ($row['is_active'] ?? true),
                        'clicks_total' => (int) ($row['clicks_total'] ?? 0),
                    ],
                );
            }

            if ($remoteSlugs !== []) {
                ShortLink::query()
                    ->where('user_id', $user->id)
                    ->where('is_managed_here', false)
                    ->whereNotIn('slug', $remoteSlugs)
                    ->delete();
            }
        });
    }
}