<?php

namespace App\Test\Slide\Admin\Form;

use Qs\Form\SubForm\Table;
use Qs\Form\SubForm\Table\Column\OptionsInterface;
use Qs\Form\SubForm\Table\Column\OptionsTrait;
use Qs\Form\SubForm\Table\Row;
use Qs_Array;

class QuestionRow extends Row implements OptionsInterface
{
    use OptionsTrait;

    protected function _initElements()
    {
        $this->addElement('hidden', 'id');
        $this->addElement('text', 'text', ['label' => 'Question', 'required' => true]);
        $this->addAnswers();
        $this->addOptionsColumn();
        return parent::_initElements();
    }

    protected function addAnswers()
    {
        $name = 'answers';
        $options = [
            'id'          => 'questions-' . $this->getName() . '-' . $name,
            'name'        => $name,
            'defaults'    => Qs_Array::get($this->_defaults, 'answers', []),
            'orientation' => Table::ORIENTATION_HORIZONTAL,
            'itemClass'   => AnswerRow::CLASS,
            'itemName'    => 'Answer',
            'itemsName'   => 'Answers',
        ];
        $this->addSubForm(new Table($options), $name);
        return $this;
    }

    public function isValid($data)
    {
        $isValid = parent::isValid($data);
        return $this->isValidCustomRules($data) && $isValid;
    }

    public function isValidPartial(array $data)
    {
        $isValid = parent::isValidPartial($data);
        return $this->isValidCustomRules($data) && $isValid;
    }

    protected function isValidCustomRules(array $data)
    {
        $isValid = $this->isValidCorrectAnswer($data);
        $isValid = $isValid && $this->isValidAnswersCount($data);
        return $isValid;
    }

    protected function isValidCorrectAnswer(array $data)
    {
        if (empty($data['answers'])) {
            return true;
        }
        if (null === ($index = Qs_Array::get($data, 'correctAnswerIndex'))
            || null === Qs_Array::get($data['answers'], $index)
        ) {
            $this->getSubForm('answers')->addError('Please mark correct answer');
            return false;
        }
        return true;
    }

    protected function isValidAnswersCount(array $data)
    {
        if (count(Qs_Array::get($data, 'answers',  [])) < 2) {
            $this->getSubForm('answers')->addError('Question should have at least two answers');
            return false;
        }
        return true;
    }

    public function getValues($suppressArrayNotation = false)
    {
        $values = parent::getValues($suppressArrayNotation);
        $values['correctAnswerIndex'] = Qs_Array::get($this->_defaults, 'correctAnswerIndex');
        return $values;
    }
}