<?php

define('FIELDSET_PREFIX', 'new_');

/**
 * Implementation of hook_menu().
 */ 
function form_manager_menu() {
  $items = array();

  $items['form/%'] = array(
    'title' => 'Form',
    'page callback' => 'form_manager_interface',
    'page arguments' => array('form_manager', 1),
    'access arguments' => array('access content'),
    'file' => 'includes/form_manager.pages.inc',
    'type' => MENU_CALLBACK,
  );
  
  // Loop through all of the forms' settings to get the path and access options to generate this
  $result = db_query("SELECT * FROM {form_manager_settings} WHERE status=1");
  while($formdata = db_fetch_array($result)) {
    //if (!menu_get_item($formdata['path'])) {
      $items[$formdata['path']] = array(
        'title' => 'Form',
        'page callback' => 'form_manager_interface',
        'page arguments' => array('form_manager', $formdata['form_id']),
        'access arguments' => array('access content'),
        'file' => 'includes/form_manager.pages.inc',
        'type' => MENU_CALLBACK,
      );
    //}
  }
  

  /* Admin page menu items */
  $items['admin/build/forms'] = array(
    'title' => 'Form Manager',
    'page callback' => 'form_manager_admin',
    'access arguments' => array('administer form_manager forms'),
    'file' => 'includes/form_manager.admin.inc',
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/list'] = array(
    'title' => 'Form Manager',
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items['admin/build/forms/add'] = array(
    'title' => 'Edit',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('form_manager_add'),
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/edit/%'] = array(
    'title' => 'Edit',
    'page callback' => 'form_manager_edit',
    'page arguments' => array('form_manager', 4),
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/exportfapi/%'] = array(
    'title' => 'Export FAPI code',
    'page callback' => 'form_manager_export_form_page',
    'page arguments' => array(4),
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/export/%'] = array(
    'title' => 'Export form',
    'page arguments' => array(4),
    'page callback' => 'form_manager_admin_exportable',
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/import'] = array(
    'title' => 'Import',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('form_manager_admin_import'),
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );
  $items['admin/build/forms/delete/%'] = array(
    'title' => 'Delete',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('form_manager_confirm_delete'),
    'access arguments' => array('administer form_manager forms'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'includes/form_manager.admin.inc',
  );

  return $items;
}


/**
 * Implementation of hook_perm().
 */
function form_manager_perm() {
  return array('administer form_manager forms');
}


/**
 * Callback function from hook_menu that displays the form to the user.
 */ 
function form_manager_interface($form_type, $form_id) {
  //module_load_include('inc', 'form_manager', 'includes/form_manager.pages');
  $output = drupal_get_form('form_manager_form', $form_id);
  return $output;
}


function form_manager_form_validate($form, &$form_state) {
  // Will do things like compare email and email2, etc...
}

function form_manager_form_submit($form, &$form_state) {
  // loop through submitted form values
  foreach ($form_state['values'] as $k => $v) {
    // add certain fields to storage
    $form_state['storage'][$k] = $v;
  }
   
  // handle button action
  switch ($form_state['clicked_button']['#value']) {
    case 'Previous':
      // set the state to rebuild
      $form_state['rebuild'] = TRUE;
           
      // set new step
      if ($form_state['storage']['#navigation']['step'] > 1) {
        $form_state['storage']['#navigation']['newStep'] = $form_state['storage']['#navigation']['step'] - 1;
      }
      break;

    case 'Next':
      // set the state to rebuild
      $form_state['rebuild'] = TRUE;
           
      // set new step
      if ($form_state['storage']['#navigation']['step'] < $form_state['storage']['#navigation']['maxSteps']) {
        $form_state['storage']['#navigation']['newStep'] = $form_state['storage']['#navigation']['step'] + 1;
      }
      break;

    case 'Save':
      // TODO
      break;
           
    // tabs
    default:
      // check if the button value maps to a tab
      $key = array_search($form_state['clicked_button']['#value'], $form_state['storage']['#navigation']['tabs']);
      if ($key) {
        $form_state['storage']['#navigation']['newStep'] = $key;
      }
      break;
  }
}


/**
 * Implementation of hook_form_alter
 *
 * Form Builder module hardcodes the options limit, so we have to ovrecome 
 * that by setting it here. This could be a drupal variable, but left hardcoded
 * for now. Needs to be at least 300 to allow for list of nations; 3000 is arbitrary.
 */ 
function form_manager_form_form_builder_field_configure_alter(&$form, &$form_state) {
  if (isset($form['options']['#limit'])) {
    // Set the options widget to a more helpful maximum value than 10
    if ($form['options']['#limit'] == 10) {
      $form['options']['#limit'] = 3000;
    }
  }

  // Add a form element to set the form element's internal name to something other than new_`time()`
  // [#OPP-19] Add an element to Form Builder to define the element's key
  $form['element_name'] = array(
    '#title' => 'Element name',
    '#type' => 'textfield',
    '#default_value' => ($form['#element']['#element_name']) ? $form['#element']['#element_name'] : $form['#element']['#key'],
    '#weight' => 6,
  );
  // do this to add our submit handler since the default form_builder_field_configure_submit
  // function will print JSON and exit Drupal in the same step, preventing any other submit
  // functions from executing.
  array_unshift($form['#submit'], 'form_manager_form_form_builder_field_configure_submit');
}


/**
 * Form submission handler to allow adding an element to the AJAX form to set the name of the 
 * form's element key name. [#OPP-19] Add an element to Form Builder to define the element's key
 */
function form_manager_form_form_builder_field_configure_submit(&$form, &$form_state) {
  $form['elementname']['#value'] = str_replace(' ', '_', $form['elementname']['#value']);
  $form['elementname']['#value'] = str_replace('?', '', $form['elementname']['#value']);
  $form['elementname']['#value'] = str_replace(',', '', $form['elementname']['#value']);
  $form['elementname']['#value'] = str_replace('.', '', $form['elementname']['#value']);
}


/**
 * Implementation of hook_form_builder_types().
 *
 * Define the supported fields and properties supported by CCK.
 */
function form_manager_form_builder_types() {
  $fields = array();

  $fields['fieldset'] = array(
    'title' => t('Fieldset'),
    'properties' => array(
      'title',
      'description',
      'collapsible',
      'collapsed',
      'element_name',
    ),
    'default' => array(
      '#title' => t('New fieldset'),
      '#type' => 'fieldset',
      '#collapsible' => TRUE,
      '#collapsed' => FALSE,
    ),
  );

  $fields['number'] = array(
    'title' => t('Number'),
    'properties' => array(
      'title',
      'description',
      'field_prefix',
      'field_suffix',
      'default_value',
      'required',
      'element_name',
    ),
    // TODO: how to handle validate functions?
    'validate' => array(
      'number',
    ),
    'default' => array(
      '#key' => 'number',
      '#title' => t('New number'),
      '#type' => 'textfield',
    ),
  );

  $fields['select'] = array(
    'title' => t('Select list'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'multiple', // Handled by options element.
      'key_type', // Handled by options element.
      'element_name',
    ),
    'default' => array(
      '#title' => t('New select list'),
      '#type' => 'select',
      '#options' => array('1' => 'one', '2' => 'two', '3' => 'three'),
      '#multiple_toggle' => TRUE,
      '#key_type' => 'mixed',
    ),
  );

  $fields['checkboxes'] = array(
    'title' => t('Checkboxes'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'multiple',
      'key_type', // Handled by options element.
      'element_name',
    ),
    'default' => array(
      '#title' => t('New checkboxes'),
      '#type' => 'checkboxes',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
    ),
  );

  $fields['radios'] = array(
    'title' => t('Radios'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'key_type', // Handled by options element.
      'element_name',
    ),
    'default' => array(
      '#title' => t('New radios'),
      '#type' => 'radios',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
    ),
  );

  $fields['textfield'] = array(
    'title' => t('Textfield'),
    'properties' => array(
      'title',
      'description',
      'field_prefix',
      'field_suffix',
      'default_value',
      'required',
      'size',
      'element_name',
    ),
    'default' => array(
      '#title' => t('New textfield'),
      '#type' => 'textfield',
    ),
  );

  $fields['textarea'] = array(
    'title' => t('Textarea'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'rows',
      'cols',
      'input_format',
      'element_name',
    ),
    'default' => array(
      '#title' => t('New textarea'),
      '#type' => 'textarea',
    ),
  );

  $fields['file'] = array(
    'title' => t('File'),
    'properties' => array(
      'title',
      'description',
      'required',
      'size',
      'file_extension_validate',
      'file_size_validate',
      'element_name',
    ),
    'default' => array(
      '#title' => t('New file'),
      '#type' => 'file',
      '#size' => 30,
    ),
  );

  $fields['image'] = array(
    'title' => t('Image'),
    'properties' => array(
      'title',
      'description',
      'required',
      'element_name',
    ),
    'validate' => array(
      'file_extension_validate',
      'file_size_validate',
      'file_image_size',
    ),
    'default' => array(
      '#title' => t('New image'),
      '#type' => 'file',
      '#size' => 30,
    ),
  );

  $fields['date_popup'] = array(
    'title' => t('Date'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'element_name',
      'date_format',
      'date_year_range',
    ),
    // TODO: how to handle validate functions?
    'validate' => array(
      'date_popup',
    ),
    'default' => array(
      '#title' => t('New date'),
      '#type' => 'date_popup',
      '#date_format' => 'm/d/Y',
      '#default_value' => 'YYYY-MM-DD 00:00:00',
      '#date_year_range' => '-80:+1',
      '#size' => 12,
    ),
  );

  $fields['hidden'] = array(
    'title' => t('User ID'),
    'properties' => array(
      'title',
      'value',
    ),
    'default' => array(
      '#type' => 'hidden',
      '#value' => 'user_id', // This will be handled as a special case in _form_manager_convert_form()
    ),
  );

  return array(
    'form_manager' => $fields,
  );
}


/**
 * Implementation of hook_form_builder_load().
 *
 * @param $form_id
 *   The unique identifier for the form being edited.
 */
function form_manager_form_builder_load($form_type, $form_id) {
  if ($form_type == 'form_manager') {
    require_once('includes/form_manager.pages.inc');
    $form = array();
    $form_state = array();
    _form_manager_form_add_fields($form, $form_state);
    return $form;
  }
}


/**
 * Implementation of hook_form_builder_preview_alter().
 */
function form_manager_form_builder_preview_alter($element, $form_type, $form_id) {
  if ($form_type == 'form_manager') {
    if (isset($element['#description'])) {
      $element['#description'] = filter_xss($element['#description']);
    }
  }
}


/* TODO: Move these 2 functions into pages.inc */

/**
 * Preparring a FAPI form to be editible by Form Builder in form_builder_preview
 */
function _form_manager_convert_form(&$form, $form_id) {
  foreach ($form as $key => $value) {
    //print "Evaluating $key</br>";
    if (!empty($value['#type']) && empty($value['#form_builder'])) {
      //print "$key needs to be converted ({$value['#type']})</br>";
      $element['#form_builder'] = _form_manager_convert_form_element($key, $form[$key]);
      foreach (element_children($form[$key]) as $child_key) {
        //print "$child_key is a child element ($child_key)</br>";
        _form_manager_convert_form($form[$key], $form_id);
      }
    }
    else {
      if ($value['#type'] == 'hidden') {
        switch($value['#value']) {
          case 'user_id':
            global $user;
            $form[$key]['#value'] = $user->uid;
            break;
        }
      }
    }
  }

  $form['#form_manager_form_id'] = (empty($form['#form_manager_form_id'])) ? $form_id : $form['#form_manager_form_id'];
}


function _form_manager_convert_form_element($key, &$element) {
  $element['#form_builder'] = array(
    'element_id' => $key,
    'element_type' => $element['#type'],
    'configurable' => TRUE,
    'removable' => TRUE,
  );
}


function form_manager_theme() {
  $theme = array(
    'form_manager_form' => array(
      'arguments' => array('form' => NULL, 'form_id' => NULL),
      'template' => 'form_manager_form',
    ),
  );
  
  return $theme;
}


/**
 * Implementation of hook_preprocess for the form_manager_form theme key. 
 *   Sets the template suggestions for form_manager_form.tpl.php and 
 *   form_manager_form-FORM_ID.tpl.php.
 */
function form_manager_preprocess_form_manager_form(&$vars) {
  if ($vars['form']['#form_manager_form_id']) {
    $vars['form_id'] = $vars['form']['#form_manager_form_id'];
  }
  else {
    //$($vars['form']['captcha']);
  }

  // Add a template suggestion in the form of form_manager_form-FORM_ID.tpl.php
  $vars['template_files'][] = 'form_manager_form-' . $vars['form_id'];
  
  // Set a boolean value whether or not this is the first time the form has been
  // seen (are we on the start page?)
  $vars['startpage'] = TRUE;
  foreach ($vars['form']['#parameters'] as $element) {
    if (is_array($element)) {
      if(!empty($element['storage'])) {
        $vars['startpage'] = FALSE;
      }
    }
  }
}