<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * Create various forms for timekeeper. 
 *
 * @author gregory
 */
class forms {

    private $questionData;
    private $returnQuestion;

    /**
     * __construct()
     * @param array() $question Question data to insert into template data
     */
    public function __construct($question) {
        $this->questionData = $question;
    }

    /**
     * Select which template to use to create the needed form.
     * 
     * @return type
     */
    public function templater() {

        foreach ($this->questionData as $key => $question) {

            switch ($key) {
                case 'numbers':
                    $this->numbers($question['question']);
                    break;
                case 'spelling':
                    $this->spelling($question['question']);
                    break;
                case 'numeracy':
                    $this->numeracy($question['question']);
                    break;
                case 'math_word_problems':
                    $this->math_word_problems($question['question']);
                    break;
                case 'elements':
                    $this->elements($question['question']);
                    break;

                case 'DebugSubjects':
                    break;

                default:
                    $this->returnQuestion = 'form error.';
                    print_a([$key => $this->questionData]);
                    break;
            }
        }

        return $this->returnQuestion;
    }

    /**
     * Create a number sequence form using the supplied question.
     * And write it into "$this->returnQuestion".
     * 
     * @param array() $data Question data to be used.
     */
    private function numbers($data) {

        $frm = e107::getForm();
        $qString = $this->formStart('Number sequences', 'Find the missing number.', $data);

        foreach ($data['question'] as $seq) {
            $qString .= $frm->label($seq . " &nbsp; ") . "\n";
        }

        $qString .= $this->formEnd($data);

        $this->returnQuestion = $qString;
    }

    /**
     * Create a spelling form using the supplied question.
     * And write it into "$this->returnQuestion".
     * 
     * @param array() $data Question data to be used.
     */
    private function spelling($data) {
        
        $tp = e107::getParser();
        $qString = $this->formStart(__FUNCTION__, 'Spell the word in the sentence.', $data);

        if (!file_exists('./audio/' . md5($data['answer1']) . '2v.wav')) {
        exec('./audio/flite-2.0.0-release/bin/flite -voice ./audio/voices/cmu_us_aew.flitevox -o "./audio/' . md5($data['answer1']) . '2v.wav" "Spell the word, ' . $tp->toHTML($data['answer1']) . '. ' . $tp->toHTML($data['question']) . '"');
        }

        $qString .= "<audio controls><source src='audio/" . md5($data['answer1']) . "2v.wav' type='audio/wav'>Your browser does not support the audio element.</audio>\n";

        $qString .= $this->formEnd($data);

        $this->returnQuestion = $qString;
    }

    /**
     * Create a numeracy form using the supplied question.
     * And write it into "$this->returnQuestion".
     * 
     * @param array() $data Question data to be used.
     */
    private function numeracy($data) {

        $frm = e107::getForm();
        $qString = $this->formStart(__FUNCTION__, $this->captionSupport($data['question']), $data);

        if ($data['question'][1] == 'r') {
            $qString .= $frm->label('$' . $data['question'][0]) . "\n";
        } elseif ($data['question'][1] == '/') {
            $qString .= $frm->label($data['question'][0] . " &nbsp; " .
                            "&#247; &nbsp; " . $data['question'][2]) . "\n";
        } else {
            $qString .= $frm->label($data['question'][0] . " &nbsp; " .
                            $data['question'][1] . " &nbsp; " . $data['question'][2]) . "\n";
        }

        $qString .= $this->formEnd($data);

        $this->returnQuestion = $qString;
    }

    /**
     * Create a math_word_problems form using the supplied question.
     * And write it into "$this->returnQuestion".
     * 
     * @param array() $data Question data to be used.
     */
    private function math_word_problems($data) {

        $frm = e107::getForm();
        $qString = $this->formStart(str_replace('_', ' ', __FUNCTION__), 'Solve the following. (Round off to the nearest whole number)', $data);

        
            $qString .= $frm->label($data['question']) . "\n";
        

        $qString .= $this->formEnd($data);

        $this->returnQuestion = $qString;
    }

    /**
     * Create a elements form using the supplied question.
     * And write it into "$this->returnQuestion".
     * 
     * @param array() $data Question data to be used.
     */
    private function elements($data) {

        //$frm = e107::getForm();
        $tp = e107::getParser();
        $sc = e107::getScBatch('timekeeper', TRUE);
        $elementData = $data['question']['element'];
        $elementData[$data['question'][1]] = '???';
        $sc->setVars($elementData);
        
        $qString = $this->formStart(str_replace('_', ' ', __FUNCTION__), 'Periodic Table of Elements. Fill in the missing information.', $data);

        $qString .= $tp->parseTemplate(file_get_contents('templates/elementTable.html'), true, $sc);
            //$qString .= $frm->label($data['question']) . "\n";
        

        $qString .= $this->formEnd($data);

        $this->returnQuestion = $qString;
    }

    private function captionSupport($questionData) {
        $descriptions = [
            '+' => 'Add the following together.',
            '-' => 'Subtract one amount from the other.',
            'x' => 'Multiplication, times one number by another.',
            '/' => 'Divide one number from another.',
            'r' => 'Round the following off to the nearest 5 cents.',
        ];

        return $descriptions[$questionData[1]];
    }

    private function formStart($label, $caption) {

        $frm = e107::getForm();

        $fString = $frm->open('questionForm', 'post', '', ['autocomplete' => 'off', 'class' => 'formclass']);
        $fString .= $frm->label('<h4>' . ucfirst($label) . '.</h4>') . "</br>\n";
        $fString .= $frm->label($caption) . "\n";
        $fString .= '</br>';
        return $fString;
    }

    private function formEnd($data) {

        $frm = e107::getForm();

        $fString = '</br></br>';
        $fString .= $frm->text('a1', '', 80, ['placeholder' => 'Write answer here!', 'autocomplete' => "off", 'spellcheck' => "false"]) . "\n";
        $fString .= $frm->hidden('checkerData', base64_encode(json_encode($data)), ['id' => 'checkerData']);
        $fString .= '</br>';
        $fString .= e107::getForm()->button('Answer', 'Check answer') . "\n";
        $fString .= e107::getForm()->close();
        $fString .= '</br></br>';
        return $fString;
    }

}