<?php
/**
 * Implementation of hook_menu().
 */
function ec_terms_menu($may_cache) {
  $items = array();

  if ($may_cache) {	
    $items[] = array(
      'path' => 'admin/ecsettings/ec_terms',
      'title' => t('Terms & Conditions'),
      'description' => t('Specify the Terms & Conditions that will be presented to a user during the checkout process.'),
      'callback' => 'ec_terms',
      'access' => user_access('administer ec_terms'),
      'type' => MENU_NORMAL_ITEM,
    );
  }
  else {

  }
  return $items;
}

/**
 * Implementation of hook_perm().
 */
function ec_terms_perm() {
  return array('administer ec_terms');
}
// Present ec_terms settings form at admin/ecsettings/ec_terms.
function ec_terms() {
  $output .= drupal_get_form('ec_terms_details', $form);	
  return $output;
}
// Actual settings form.
function ec_terms_details() {
  // Check and see if we're requiring ec_terms, to set default value for form.
  $set = variable_get('ec_terms', '');
  if (isset($set)) {
    $required = 'Y';
  }
  else {
    $required = 'N';
  }
  $form['ec_terms']['switch'] = array(
    '#type' => 'select',
    '#title' => t('Present terms & conditions to user?'),
    '#options' => array('Y' => t('Yes'), 'N' => t('No')),
    '#default_value' => $required,
  );
  $form['ec_terms']['how'] = array(
    '#type' => 'select',
    '#title' => t('When to present terms'),
    '#description' => t('Terms present at review will only display, not require user interaction'),
    '#options' => array('page' => t('Seperate screen'), 'review' => t('Checkout review')),
    '#default_value' => variable_get('ec_terms_page', ''),
  );
  $form['ec_terms']['text'] = array(
    '#type' => 'textarea',
    '#title' => t('Terms & Conditions'),
    '#description' => t('These will be displayed during the checkout process. HTML Accepted'),
    '#cols' => 60,
    '#rows' => 15,
    '#default_value' => variable_get('ec_terms', ''),
  );
  $form['ec_terms']['save'] = array(
    '#type' => 'submit', 
    '#value' => t('Save'),
    '#submit' => 'ec_terms_detail_submit',
  );

  return $form;
}

function ec_terms_details_validate($form_id, $form_values) {
  if ($form_values['switch'] == 'Y' && $form_values['text'] == ''){
    form_set_error('error', 'If you\'re going to require ec_terms you should probably enter something here...');
  }
  if ($form_values['how'] == '') {
   form_set_error('error', 'You must specify when EC terms should be presented to the user'); 
  }
}

function ec_terms_details_submit($form_id, $form_values) {
  if ($form_values['switch'] == 'Y'){
    variable_set('ec_terms', $form_values['text']);
    drupal_set_message('ec_terms will be required during checkout');
  }	
  if ($form_values['switch'] == 'N') {
    variable_del('ec_terms');
    drupal_set_message('ec_terms will not be required during checkout');
  }
  if ($form_values['how'] == 'page') {
    variable_set('ec_terms_page', $form_values['how']);
    drupal_set_message('ec_terms will be a seperate screen during checkout.');
  }
  if ($form_values['how'] == 'review') {
    variable_set('ec_terms_page', $form_values['how']);
    drupal_set_message('ec_terms will be shown on the review screen (requiring no active confirmation)');
  }
}

/**
 * Implementation of hook_checkoutapi(). 
 */ 
function ec_terms_checkoutapi(&$txn, $op, $arg3 = NULL, $arg4 = NULL){
  $ec_terms_string = variable_get('ec_terms', '');
  $ec_terms = filter_xss($ec_terms_string, $allowed_tags = array('a', 'em', 'strong', 'ul', 'ol', 'li', 'dl', 'dt', 'dd', 'div'));

  $output = '';
  switch ($op) {
    case 'form':
      if (variable_get('ec_terms_page', '') == 'page') {
        $form = _present_ec_terms($ec_terms);
        return $form;
      }
    break;

    case 'validate':
      if (isset($txn->ec_terms) && $txn->ec_terms == 0) {
        form_set_error('error', t('Accept these terms in order to continue'));
      }
    break;

    case 'save':
      if ($txn->ec_terms !== 0) {
        $txn->screen++;
      }
    break;

    case 'review':
      if(variable_get('ec_terms_page', '') == 'review'){
        $form = _present_ec_terms($ec_terms);
        return $form;
      }
    break;

    case 'review_validate':
    break;

    case 'review_save':
      $txn->screen++;
    break;
  }
}

function theme_ec_terms_review_form(&$form) {
  $ec_terms = variable_get('ec_terms', '');
  $output = theme('box', t('Terms & Conditions'), $ec_terms);
  return $output;
}

function _present_ec_terms($ec_terms) {
	
  $form['text'] = array(
    '#type' => 'markup',
    '#prefix' => '<div class="ec_terms">',
    '#value' => $ec_terms,
    '#suffix' => '</div>',
  );
  $form['ec_terms'] = array(
    '#type' => 'checkbox',
    '#title' => t('I agree to these terms'),
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Checkout'),
  );
  return $form;
}