<?php

namespace App\Admin\Services\Train;

use App\Admin\Filters\TrianPaperFilter;
use App\Admin\Services\BaseService;
use App\Models\Train\Paper;

class PaperService extends BaseService
{
    protected array $withRelationships = ['examination', 'employee'];

    protected string $modelName = Paper::class;

    protected string $modelFilterName = TrianPaperFilter::class;

    /**
     * 答题
     *
     * @param  array  $answers [[0, 1], [1], [2, 3]]
     * @return bool
     */
    public function answer(Paper $paper, array $answers)
    {
        if ($paper->finished_at) {
            return $this->setError('已经答过了');
        }
        $content = [];
        $mark = 0;
        foreach ($paper->content as $index => $item) {
            $options = [];
            $item['user_answer'] = data_get($answers, $index, []);
            $score = $item['score'];
            foreach ($item['options'] as $subIndex => $option) {
                $option['selected'] = in_array($subIndex, $item['user_answer']);
                if ((! $option['is_true'] && $option['selected']) || ($option['is_true'] && ! $option['selected'])) {
                    $score = 0;
                }
                array_push($options, $option);
            }
            $item['user_score'] = $score;
            $item['options'] = $options;
            $item['user_right'] = $score == $item['score'];
            array_push($content, $item);
            $mark += $score;
        }

        $paper->update(['content' => $content, 'mark' => $mark, 'finished_at' => now()]);

        return true;
    }
}