<?php
require_once('../templates/templates.php');

$cacheQuestions = array();
$cacheChoices = array();

function loadQuestionTemplate ($type) {
   global $cacheQuestions;
   if (!isset($cacheQuestions[$type])) {
      $cacheQuestions[$type] = getTemplate(strtolower("question_$type.html"));
   }
   return $cacheQuestions[$type];
}

function loadChoicesTemplate ($type) {
   global $cacheChoices;
   if (!isset($cacheChoices[$type])) {
      $cacheChoices[$type] = getTemplate(strtolower("choice_$type.html"));
   }
   return $cacheChoices[$type];
}

function generateFormHTML ($form) {
   $pageCount = 1;
   $formText = "";
   $content = "";
   $questions = $form['questions'];
   $pageTemplate = getTemplate('form_page.html');
   foreach ($questions as $question) {
      if ($question->type === 'PAGEBREAK') {
         if (strlen($content) > 0) {
            $context = array('page_number'=>$pageCount,'questions'=>$content);
            $formText = $formText . parseTemplate($pageTemplate, $context);
            $pageCount++;
            $content = "";
         }
         continue;
      }
      $questionTemplate = loadQuestionTemplate($question->type);
      $required = "";
      if (property_exists($question,'required')) {
         $required = "required";
      }
      $context = array('id'=>$question->number,'text'=>$question->text, 'required'=>$required);
      if (in_array($question->type, array('S','M'))) {
         $context['choices'] = generateChoices($question);
      }
      $content = $content . parseTemplate($questionTemplate, $context);
   }

   if (strlen($content) > 0) {
      $context = array('page_number'=>$pageCount,'questions'=>$content);
      $formText = $formText . parseTemplate($pageTemplate, $context);
   }

   $formTemplate = getTemplate('form.html');
   $context = ['title'=>$form['title'], 'description'=>$form['description'], 'pages'=>$formText, 'form_id'=>$form['id']];
   return parseTemplate($formTemplate, $context);
}

function generateChoices ($question) {
   $choices = $question->choices;
   $content = "";
   $template = loadChoicesTemplate($question->type);
   for ($i = 0; $i < count($choices); $i++) {
      $choice = $choices[$i];
      $context = ['id' => $question->number, 'count' => $i, 'value'=>$choice->value, 'text'=>$choice->text];
      $content = $content . parseTemplate($template, $context);
   }
   return $content;
}