<?php

namespace App\Classes\Modules\Questionnaires\Processors;


use App\Classes\Modules\Questionnaires\Services\FetchesQuestion;
use Illuminate\Http\Request;
use App\Classes\ValueObjects\Constants\QAType;

class FetchNextQuestionV1AdminWFProcessor
{
    /** @var FetchesQuestion */
    private $fetchesQuestion;

    /**
     * FetchNextQuestionV1AdminWFProcessor constructor.
     * @param FetchesQuestion $fetchesQuestion
     */
    public function __construct(FetchesQuestion $fetchesQuestion)
    {
        $this->fetchesQuestion = $fetchesQuestion;
    }

    public function execute(Request $request,  $previousAnswer){
        $isEnd = 0;
        $questionId = 0;
        $nextQuestionNumber = 0;
        $nextNestedQuestion = 0;
        $nextMainQuestion= 0;
        $questionnaireSetId = 0;
        $currentQuestion = $request->question;
        $questionType = QAType::DEFAULT;
        $returnQuestion = null;

        if ($currentQuestion && array_key_exists('id', $currentQuestion)) {
            $questionId = $currentQuestion['id'];
            $isEnd = $currentQuestion['is_end'];
            $questionType = $currentQuestion['question_type'];
            $nextNestedQuestion = $currentQuestion['next_nested_question'];
            $nextMainQuestion = $currentQuestion['next_main_question'];
            $questionnaireSetId = $currentQuestion['questionnaire_set_id'];
        }

        if ($request->has('answerObj') && $request->answerObj['next_question_number']) {
            $nextQuestionNumber = $request->answerObj['next_question_number'];
        }

        if ($request->has('isPrevious')) {
            if($previousAnswer)
            {
                $previousAnswer->delete();
            }
            else{
                return null;
            }

            //Get previous question
            $previousQuestion = $this->fetchesQuestion->execute(['questionnaire_set_id' => $questionnaireSetId, 'id' => $previousAnswer['question_id']]);
            $returnQuestion = $previousQuestion;
        }
        else{
            //Get next question
            $nextQuestion = null;
            $question_number = 0;
            if($nextQuestionNumber !== 0){
                $question_number = $nextQuestionNumber;
            }
            else if($nextNestedQuestion !== 0){
                $question_number = $nextNestedQuestion;
            }
            else {
                $question_number = $nextMainQuestion;
            }

            if($question_number !== 0){
                $nextQuestion = $this->fetchesQuestion->execute(['questionnaire_set_id' => $questionnaireSetId, 'question_number' => $question_number]);
                $returnQuestion =  $nextQuestion;
            }
            else if (array_key_exists('id', $request->input('question'))) {
                $nextQuestion = $this->fetchesQuestion->execute(['questionnaire_set_id' => $questionnaireSetId, 'id_next' => $questionId, 'next_main_question' => null]);
                $returnQuestion = $nextQuestion;
            }
        }

        return $returnQuestion;
    }
}