<?php

require_once('geofield.widgets.inc');
require_once('geofield.formatters.inc');
require_once('geofield.openlayers.inc');
require_once('geofield.feeds.inc');

/**
 * Implements hook_field_info().
 */
function geofield_field_info() {
  return array(
    'geofield' => array(
      'label' => 'Geofield',
      'description' => t('This field stores geo information.'),
      'default_widget' => 'geofield_wkt',
      'default_formatter' => 'geofield_wkt',
      'instance_settings' => array(
        'local_solr' => array(
          'enabled' => FALSE,
          'lat_field' => 'lat',
          'lng_field' => 'lng',
        ),
      ),
      'property_type' => 'geofield',
      'property_callbacks' => array('geofield_property_info_callback'),
    ),
  );
}

/**
 * Implements hook_field_presave().
 * PDO throws an error when attempting to insert an empty string into a float
 * field. Go through all values and convert empty strings to NULL.
 */
function geofield_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
  if ($field['type'] === 'geofield') {
    foreach ($items as $delta => $item) {
      if (!empty($item)) {
        foreach ($item as $k => $v) {
          if ($v === '') {
            $item[$k] = NULL;
          }
        }
        $widget = $instance['widget'];
        if ($widget['type'] == 'geofield_wkt') {
          $master_column = 'wkt';
        }
        elseif ($widget['type'] == 'geofield_latlon') {
          $master_column = 'latlon';
        }
        elseif ($widget['type'] == 'geofield_bounds') {
          $master_column = 'bounds';
        }
        elseif ($widget['type'] == 'geofield_geolocation') {
          $master_column = 'latlon';
        }
        else {
          $master_column = 'wkt';
        }
        $item += array('master_column' => $master_column);
        geofield_compute_values($item, $item['master_column']);
        $items[$delta] = $item;
      }
    }
  }
}

/**
 * Implements hook_field_is_empty().
 */
function geofield_field_is_empty($item, $field) {
  // TODO: This is ugly. Please fix.
  if (!empty($item['master_column'])) {
    switch ($item['master_column']) {
      case 'wkt';
        return (empty($item['wkt']));
      case 'latlon':
        return (empty($item['lat']) && empty($item['lon']));
      case 'bounds':
        return (empty($item['left']) && empty($item['right']) && empty($item['top']) && empty($item['bottom']));
    }
  }
  else {
    return (empty($item['wkt']));
  }
}

/**
 * Implements hook_view_api().
 */
function geofield_views_api() {
  return array(
    'api' => '3.0-alpha1',
    'path' => drupal_get_path('module', 'geofield') . '/views',
  );
}

/**
 * Implements hook_ctools_plugin_type().
 */
function geofield_ctools_plugin_type() {
  return array(
    'behaviors' => array(
      'use hooks' => TRUE,
    )
  );
}

/**
 * Implements hook_ctools_plugin_api().
 */
function geofield_ctools_plugin_api($module, $api) {
  return array('version' => 1);
}

 /**
 * Implements hook_field_instance_settings_form().
 */
function geofield_field_instance_settings_form($field, $instance) {
  $form = array();
  // Add in local solr settings
  if (module_exists('apachesolr')) {

    if (isset($instance['settings']['solrspatial'])) $setting = $instance['settings']['solrspatial'];
    else $setting = array();

    $form['solrspatial'] = array(
      '#type' => 'fieldset',
      '#title' => t('Local Solr Settings'),
      '#tree' => TRUE,
    );

    $form['solrspatial']['enabled'] = array(
      '#type' => 'checkbox',
      '#title' => t('Index field in Solr for spatial search'),
      '#default_value' => isset($setting['enabled']) ? $setting['enabled'] : '',
    );

    $form['solrspatial']['lat_field'] = array(
      '#type' => 'textfield',
      '#title' => t('Name of the Solr Latitude Field'),
      '#default_value' => isset($setting['lat_field']) ? $setting['lat_field'] : '',
    );

    $form['solrspatial']['lng_field'] = array(
      '#type' => 'textfield',
      '#title' => t('Name of the Solr Lonitude Field'),
      '#default_value' => isset($setting['lng_field']) ? $setting['lng_field'] : '',
    );
    $form['solrspatial']['latlng_field'] = array(
      '#type' => 'textfield',
      '#title' => t('Name of the Solr LatLon Field'),
      '#default_value' => isset($setting['latlng_field']) ? $setting['latlng_field'] : '',
    );
  }

  return $form;
}

/**
 * Geofield Compute Values
 *
 *  Compute all dependant values. We compute all other values from whichever
 * column is specified in the master_column value
 *
 * Steps:
 * 1. Load the geoPHP library
 * 2. Load the Geometry object from the master-column
 * 3. Get out all the computer values from the Geometry object
 * 4. Set all the values
 *
 * Allowed values for master_column are wkt, latlon, bounds
 */
function geofield_compute_values(&$values, $master_column = 'wkt') {

  // If only a wkt string has been passed in, then format it correctly by wrapping it in an array
  if ($master_column == 'wkt' && !is_array($values)) {
    $values = array('wkt' => $values);
  }

  // Load up geoPHP to do the conversions
  $geophp = geophp_load();
  if (!$geophp) {
    drupal_set_message(t("Unable to load geoPHP library. Not all values will be calculated correctly"), 'error');
    return;
  }

  // Load up the geometry object from the master-column data
  if ($master_column == 'wkt') {
    $wkt = $values['wkt'];
    if ($wkt) {
      $geometry = geoPHP::load($wkt, 'wkt');
    }
  }

  if ($master_column == 'latlon') {
    $lat = $values['lat'];
    $lon = $values['lon'];
    if (is_numeric($lat) && is_numeric($lon)) {
      $geometry = new Point(floatval($lon), floatval($lat));
    }
  }

  if ($master_column == 'bounds') {
    $top = $values['top'];
    $bottom = $values['bottom'];
    $right = $values['right'];
    $left = $values['left'];

    if (is_numeric($top) && is_numeric($bottom) && is_numeric($right) && is_numeric($left)) {
      $wkt_bounds_format = 'POLYGON((left bottom,right bottom,right top,left top,left bottom))';
      $wkt = strtr($wkt_bounds_format, array('top' => $top, 'bottom' => $bottom, 'right' => $right, 'left' => $left));
      $geometry = geoPHP::load($wkt, 'wkt');
    }
  }

  // Get values from geometry
  if (isset($geometry)) {
    $values = geofield_get_values_from_geometry($geometry);
  }
  else {
    $values = array();
  }

  return $values;
}

/**
 * Given a geometry object from geoPHP, return a values array
 */
function geofield_get_values_from_geometry($geometry) {
  $centroid = $geometry->getCentroid();
  $bounding = $geometry->getBBox();

  $values['wkt'] = $geometry->out('wkt');
  $values['geo_type'] = drupal_strtolower($geometry->getGeomType());

  $values['lat'] = $centroid->getY();
  $values['lon'] = $centroid->getX();

  $values['top'] = $bounding['maxy'];
  $values['bottom'] = $bounding['miny'];
  $values['right'] = $bounding['maxx'];
  $values['left'] = $bounding['minx'];

  return $values;
}

/**
 * Implements hook_apachesolr_field_mappings().
 */
function geofield_apachesolr_field_mappings() {
  return array(
    'geofield' => array(
      'indexing_callback' => 'geofield_apachesolr_index',
      'facets' => TRUE,
    )
  );
}

/**
 * Name callback for field name
 */
function geofield_apachesolr_index($node, $field_name, $index_key, $field_info) {
  $return = array();
  if (isset($node->$field_name)) {
    // Load the instance settings for the field
    $instance = field_info_instance('node', $field_name, $node->type);
    if (!empty($instance['settings']['solrspatial'])) {
      if ($values = field_get_items('node', $node, $field_name)) {
        $values = reset($values);
        $return = array(
          array(
            'key' => $instance['settings']['solrspatial']['lat_field'],
            'value' => $values['lat']
          ),
          array(
            'key' => $instance['settings']['solrspatial']['lng_field'],
            'value' =>  $values['lon']
          ),
          array(
            'key' => $instance['settings']['solrspatial']['latlng_field'],
            'value' =>  $values['lat'] . ',' . $values['lon']
          ),
          array(
            'key' => 'ss_geo_wkt',
            'value' => $values['wkt'],
          ),
        );
      }
    }
  }

  return $return;
}

/**
 * Implements hook_apachesolr_query_alter()
 */
function geofield_apachesolr_query_alter($query) {
  // Add the WKT field field
  $query->addParam('fl', 'ss_geo_wkt');
}


// Latitude and Longitude string conversion
// ----------------------------------------

/**
 * Decimal-Degrees-Seconds to Decimal Degrees
 *
 * Converts string to decimal degrees. Has some error correction for messy strings
 */
function geofield_latlon_DMStoDEC($dms) {
  if (is_numeric($dms)) {
    // It's already decimal degrees, just return it
    return $dms;
  }

  // If it contains both an H and M, then it's an angular hours
  if (stripos($dms, 'H') !== FALSE && stripos($dms, 'M') !== FALSE) {
    $dms = strtr($dms, "'\"HOURSMINTECNDAhoursmintecnda", "  ");
    $dms = preg_replace('/\s\s+/', ' ', $dms);

    $dms = explode(" ", $dms);
    $deg = $dms[0];
    $min = $dms[1];
    $sec = $dms[2];

    $dec = floatval(($deg*15) + ($min/4) + ($sec/240));

    return $dec;
  }

  // If it contains an S or a W, then it's a negative
  if (stripos($dms, 'S') !== FALSE || stripos($dms, 'W') !== FALSE) {
    $direction = -1;
  }
  else {
    $direction = 1;
  }

  // Strip all characters and replace them with empty space
  $dms = strtr($dms, "�'\"NORTHSEAWnorthseaw'", " ");
  $dms = preg_replace('/\s\s+/', ' ', $dms);

  $dms = explode(" ", $dms);
  $deg = $dms[0];
  $min = $dms[1];
  $sec = $dms[2];

  // Direction should be checked only for nonnegative coordinates
  $dec = floatval($deg+((($min*60)+($sec))/3600));
  if ($dec > 0) {
    $dec = $direction * $dec;
  }
  return $dec;
}


/**
 * Decimal Degrees to Decimal-Degrees-Seconds
 *
 * Converts decimal longitude / latitude to DMS ( Degrees / minutes / seconds )
 */
function geofield_latlon_DECtoDMS($dec, $axis) {
  if ($axis == 'lat') {
    if ($dec < 0) $direction = 'S';
    else $direction = 'N';
  }
  if ($axis == 'lon') {
    if ($dec < 0) $direction = 'W';
    else $direction = 'E';
  }

  $vars = explode(".", $dec);
  $deg = abs($vars[0]);
  if (isset($vars[1])) {
    $tempma = "0." . $vars[1];
  }
  else {
    $tempma = "0";
  }

  $tempma = $tempma * 3600;
  $min = floor($tempma / 60);
  $sec = $tempma - ($min*60);

  return $deg . "&deg; " . $min . "' " . round($sec, 3) . "\" " . $direction;
}

/**
 * Decimal Degrees to Celestial coordinate system (CCS) units
 *
 * Converts decimal latitude to DMS ( Degrees / minutes / seconds ) and decimal longitude to Angular Hours / Minutes / Seconds
 */
function geofield_latlon_DECtoCCS($dec, $axis) {

  // Declination (celestial latitude) should be representeted in Degrees / minutes / seconds
  if ($axis == 'lat') {
    $vars = explode("." , $dec);
    $deg = $vars[0];
    if (isset($vars[1])) {
      $tempma = "0." . $vars[1];
    }
    else {
      $tempma = "0";
    }

    $tempma = $tempma * 3600;
    $min = floor($tempma / 60);
    $sec = $tempma - ($min*60);

    return $deg . "&deg; " . $min . "' " . round($sec, 3) . "\"";
  }

  // Right ascension (celestial longitude) should be representeted in Hours / Minutes / Seconds
  if ($axis == 'lon') {
    $tempma = $dec / 15;
    $vars = explode(".", $tempma);
    $hrs = $vars[0];
    if (isset($vars[1])) {
      $tempma = "0." . $vars[1];
    }
    else {
      $tempma = "0";
    }
    $tempma = $tempma * 60;
    $vars = explode(".", $tempma);
    $min = $vars[0];
    if (isset($vars[1])) {
      $tempma = "0." . $vars[1];
    }
    else {
      $tempma = "0";
    }
    $sec = $tempma * 60;

    return $hrs . "h " . $min . "m " . round($sec, 3) . "s";
  }
}

/**
 * Callback to alter the property info of geofield fields.
 *
 * @see geofield_field_info().
 */
function geofield_property_info_callback(&$info, $entity_type, $field, $instance, $field_type) {
  $name = $field['field_name'];
  $property = &$info[$entity_type]['bundles'][$instance['bundle']]['properties'][$name];

  $property['type'] = ($field['cardinality'] != 1) ? 'list<geofield>' : 'geofield';
  $property['getter callback'] = 'entity_metadata_field_verbatim_get';
  $property['setter callback'] = 'entity_metadata_field_verbatim_set';
//  $property['auto creation'] = 'geofield_default_values';
  $property['property info'] = geofield_data_property_info('Geofield');

  unset($property['query callback']);
}

/**
 * Defines info for the properties of the geofield field data structure.
 */
function geofield_data_property_info($name = NULL) {
  // Build an array of basic property information for the geofield field.
  $properties = array(
    'wkt' => array(
      'label' => 'Well-known text',
      'type' => 'text',
    ),
    'geo_type' => array(
      'label' => 'Geo Type',
      'options list' => '_geofield_geo_types_options_callback',
      'required' => TRUE,
    ),
    'lat' => array(
      'label' => 'Latitude',
      'type' => 'decimal',
      'required' => TRUE,
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'lon' => array(
      'label' => 'Longitude',
      'type' => 'decimal',
      'required' => TRUE,
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'left' => array(
      'label' => 'Left Latitude',
      'type' => 'decimal',
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'top' => array(
      'label' =>  'Top Longitude',
      'type' => 'decimal',
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'right' => array(
      'label' => 'Right Latitude',
      'type' => 'decimal',
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'bottom' => array(
      'label' => 'Bottom Longitude',
      'type' => 'decimal',
      'setter callback' => 'entity_property_verbatim_set',
    ),
    'srid' => array(
      'label' => 'Projection (SRID)',
      'type' => 'integer'
    ),
    'latlon' => array(
      'label' => 'LatLong Pair',
      'type'  => 'string',
      'getter callback' => 'geofield_return_latlon',
    ),
  );


  // Add the default values for each of the geofield properties.
  foreach ($properties as $key => &$value) {
    $value += array(
      'description' => !empty($name) ? t('!label of field %name', array('!label' => $value['label'], '%name' => $name)) : '',
      'getter callback' => 'entity_property_verbatim_get',
    );
  }

  return $properties;
}


function _geofield_geo_types_options_callback() {

  $geophp = geophp_load();
  if (!$geophp) {
    return;
  }
  return geoPHP::geometryList();

}

/**
 * Gets the a latlong property.
 */
function geofield_return_latlon($data, array $options, $name) {
  if ((is_array($data) || (is_object($data) && $data instanceof ArrayAccess))) {
    return $data['lat'] . ',' . $data['lon'];
  }
  return NULL;
}