<?php

namespace App\Http\Controllers;

use App\Http\Requests\UpdateStatisfationStatRequest;
use App\Models\FaqQuestions;
use App\Models\FaqThemes;

class FaqController extends Controller
{
    /**
     * OrderBy utility
     * Working SQL query
     *
     * select * from `faq_themes`
     * inner join `faq_questions` on `faq_themes`.`id` = `faq_questions`.`faq_themes_id`
     * inner JOIN (
     *   SELECT (1 - faq_questions.negative_vote / faq_questions.positive_vote) AS `faq_questions_utility`
     *   FROM `faq_questions`
     * ) b on `faq_themes`.`id` = `faq_questions`.`faq_themes_id`
     * order by `faq_questions_utility` desc;
     *
     * @return void
     */
    public function index()
    {
        return view('front.faq.index', [
            'themes' => FaqThemes::with(['questions' => function ($q) {
                return $q->select('faq_questions.*')
                    ->selectRaw(
                        '(1 - faq_questions.negative_vote / faq_questions.positive_vote) AS `faq_questions_utility`'
                    )->orderBy('faq_questions_utility', 'desc');
            }])->orderBy('order')->get()
        ]);
    }

    public function updateSatisfactionStat(UpdateStatisfationStatRequest $request, FaqQuestions $question)
    {
        $opinion    = (bool)$request->opinion;
        $sessionKey = sprintf('faq.questions.%d', $question->id);
        if (!session()->has($sessionKey)) {
            session()->put($sessionKey, true);
            session()->save();
            if ($opinion) {
                $question->positive_vote = intval(($question->positive_vote ?? 0) + 1);
            } else {
                $question->negative_vote = intval(($question->negative_vote ?? 0) + 1);
            }
            $question->saveOrFail();
        }
        return response()->json();
    }
}