<?php

namespace App\Services;

use App\Enums\PushNotificationCategoryEnum;
use App\Enums\PushNotificationTargetEnum;
use App\Jobs\SendManualPushJob;
use App\Models\PushNotificationLog;
use App\Models\User;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Pagination\LengthAwarePaginator;

class ManualPushService
{
    private const CHUNK_SIZE = 50;

    public function recipients(PushNotificationTargetEnum $target, ?string $search = null): Collection
    {
        return User::query()
            ->whereHas($this->relationFor($target))
            ->when($search, function ($query) use ($search) {
                $query->where(function ($sub) use ($search) {
                    $sub->where('name', 'like', "%{$search}%")
                        ->orWhere('email', 'like', "%{$search}%");
                });
            })
            ->withCount(['deviceTokens as active_device_tokens_count' => fn ($q) => $q
                ->where('app_type', $target->value)
                ->where('active', true),
            ])
            ->orderBy('name')
            ->get(['id', 'name', 'email', 'push_notifications_enabled']);
    }

    /**
     * Enfileira o envio manual e devolve quantos destinatários foram aceitos.
     *
     * @param  int[]  $userIds
     */
    public function send(PushNotificationTargetEnum $target, array $userIds, string $title, string $body): int
    {
        $validIds = User::whereIn('id', $userIds)
            ->whereHas($this->relationFor($target))
            ->pluck('id');

        foreach ($validIds->chunk(self::CHUNK_SIZE) as $chunk) {
            SendManualPushJob::dispatch($chunk->values()->all(), $title, $body, $target);
        }

        return $validIds->count();
    }

    public function history(int $page = 1, int $perPage = 10, ?string $search = null): LengthAwarePaginator
    {
        return PushNotificationLog::query()
            ->where('category', PushNotificationCategoryEnum::MANUAL->value)
            ->with('user:id,name,email')
            ->when($search, fn ($query) => $query->where(function ($sub) use ($search) {
                $sub->where('title', 'like', "%{$search}%")
                    ->orWhereHas('user', fn ($user) => $user
                        ->where('name', 'like', "%{$search}%")
                        ->orWhere('email', 'like', "%{$search}%")
                    );
            }))
            ->orderBy('sent_at', 'desc')
            ->paginate($perPage, ['*'], 'page', $page);
    }

    //

    private function relationFor(PushNotificationTargetEnum $target): string
    {
        return $target === PushNotificationTargetEnum::PRESTADOR ? 'provider' : 'client';
    }
}