<?php

/**
 * Editable Spam Protecter Field. Used with the User Defined Forms module (if 
 * installed) to allow the user to have captcha fields with their custom forms
 * 
 * @package spamprotection
 */
if(class_exists('EditableFormField')) {
	
	class EditableSpamProtectionField extends EditableFormField {
	
		private static $singular_name = 'Spam Protection Field';
	
		private static $plural_name = 'Spam Protection Fields';
		/**
		 * Fields to include spam detection for
		 *
		 * @var array
		 * @config
		 */
		private static $check_fields = array(
			'EditableEmailField',
			'EditableTextField',
			'EditableNumericField'
		);
	
		public function getFormField() {
			// Get protector
			$protector = FormSpamProtectionExtension::get_protector();
			if(!$protector) return false;

			// Extract saved field mappings and update this field.
			$fieldMapping = array();
			foreach($this->getCandidateFields() as $otherField) {
				$mapSetting = "Map-{$otherField->Name}";
				$spamField = $this->getSetting($mapSetting);
				$fieldMapping[$otherField->Name] = $spamField;
			}
			$protector->setFieldMapping($fieldMapping);

			// Generate field
			return $protector->getFormField($this->Name, $this->Title, null);
		}

		/**
		 * Gets the list of all candidate spam detectable fields on this field's form
		 *
		 * @return DataList
		 */
		protected function getCandidateFields() {

			// Get list of all configured classes available for spam detection
			$types = self::config()->check_fields;
			$typesInherit = array();
			foreach ($types as $type) {
				$subTypes = ClassInfo::subclassesFor($type);
				$typesInherit = array_merge($typesInherit, $subTypes);
			}

			// Get all candidates of the above types
			return $this
				->Parent()
				->Fields()
				->filter('ClassName', $typesInherit)
				->exclude('Title', ''); // Ignore this field and those without titles
		}

		public function getFieldConfiguration() {
			$fields = parent::getFieldConfiguration();

			// Get protector
			$protector = FormSpamProtectionExtension::get_protector();
			if (!$protector) return $fields;
			
			if ($this->Parent()->Fields() instanceof UnsavedRelationList) {
				return $fields;
			}
			
			// Each other text field in this group can be assigned a field mapping
			$mapGroup = FieldGroup::create(_t(
				'EditableSpamProtectionField.SPAMFIELDMAPPING',
				'Spam Field Mapping'
			))->setDescription(_t(
				'EditableSpamProtectionField.SPAMFIELDMAPPINGDESCRIPTION',
				'Select the form fields that correspond to any relevant spam protection identifiers'
			));

			// Generate field specific settings
			$mappableFields = Config::inst()->get('FormSpamProtectionExtension', 'mappable_fields');
			$mappableFieldsMerged = array_combine($mappableFields, $mappableFields);
			foreach ($this->getCandidateFields() as $otherField) {
				$mapSetting = "Map-{$otherField->Name}";
				$fieldOption = DropdownField::create(
					$this->getSettingName($mapSetting),
					$otherField->Title,
					$mappableFieldsMerged,
					$this->getSetting($mapSetting)
				)->setEmptyString('');
				$mapGroup->push($fieldOption);
			}
			$fields->insertBefore($mapGroup, $this->getSettingName('ExtraClass'));

			return $fields;
		}

		public function getFieldValidationOptions() {
			return new FieldList();
		}
		
		public function getRequired() {
			return false;
		}

		public function getIcon() {
			return 'spamprotection/images/' . strtolower($this->class) . '.png';
		}
	
		public function showInReports() {
			return false;
		}
	}
}