<?php

namespace App\Services;

use App\Models\UnitInhabitantClassification;
use App\Models\User;
use Illuminate\Auth\Access\AuthorizationException;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Facades\Auth;

class UnitInhabitantClassificationService
{
    public function findById(int $id): ?UnitInhabitantClassification
    {
        return UnitInhabitantClassification::find($id);
    }

    public function create(array $data): UnitInhabitantClassification
    {
        return UnitInhabitantClassification::create($data);
    }

    public function update(int $id, array $data): ?UnitInhabitantClassification
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        $this->authorizeUnitAccess($model->unit_id);

        $model->update($data);
        return $model->fresh();
    }

    public function delete(int $id): bool
    {
        $model = $this->findById($id);

        if (!$model) {
            return false;
        }

        $this->authorizeUnitAccess($model->unit_id);

        return $model->delete();
    }

    //

    public function getByUnit(int $unitId): Collection
    {
        $this->authorizeUnitAccess($unitId);

        return UnitInhabitantClassification::where('unit_id', $unitId)
            ->orderBy('description')
            ->get();
    }

    public function getSelectList(int $unitId): Collection
    {
        return UnitInhabitantClassification::where('unit_id', $unitId)
            ->orderBy('description')
            ->get(['id', 'description', 'acronym', 'unit_id']);
    }

    //

    private function authorizeUnitAccess(int $unitId): void
    {
        /** @var User $user */
        $user = Auth::user();

        if ($user->isAdmin()) {
            return;
        }

        $hasUnit = $user->units()->where('units.id', $unitId)->exists();

        if (!$hasUnit) {
            throw new AuthorizationException('Acesso negado: você não tem permissão para esta unidade.');
        }
    }
}