class PUM_Triggers {

	/**
	 * @var PUM_Triggers
	 */
	public static $instance;

	/**
	 * @var bool
	 */
	public $preload_posts = false;

	/**
	 * @var array
	 */
	public $triggers;

	/**
	 * Initializes the triggers.
	 */
	public static function init() {
		self::instance();
	}

	/**
	 * Creates the triggers instance.
	 *
	 * @return PUM_Triggers
	 */
	public static function instance() {
		if ( ! isset( self::$instance ) ) {
			self::$instance                = new self();
			self::$instance->preload_posts = pum_is_popup_editor();
		}

		return self::$instance;
	}

	/**
	 * Adds an array of triggers to the initialized triggers.
	 *
	 * @param array $triggers The array of triggers to add.
	 * @uses PUM_Triggers::add_trigger()
	 */
	public function add_triggers( $triggers = array() ) {
		foreach ( $triggers as $key => $trigger ) {
			if ( empty( $trigger['id'] ) && ! is_numeric( $key ) ) {
				$trigger['id'] = $key;
			}

			$this->add_trigger( $trigger );
		}
	}

	/**
	 * Initializes a single trigger
	 *
	 * @param array $trigger The trigger array.
	 */
	public function add_trigger( $trigger = array() ) {
		if ( ! empty( $trigger['id'] ) && ! isset( $this->triggers[ $trigger['id'] ] ) ) {
			$trigger = wp_parse_args(
				$trigger,
				array(
					'id'              => '',
					'name'            => '',
					'modal_title'     => '',
					'settings_column' => '',
					'priority'        => 10,
					'tabs'            => $this->get_tabs(),
					'fields'          => array(),
				)
			);

			if ( empty( $trigger['modal_title'] ) && ! empty( $trigger['name'] ) ) {
				$trigger['modal_title'] = sprintf( _x( '%s Trigger Settings', 'trigger settings modal title', 'popup-maker' ), $trigger['name'] );
			}

			// Here for backward compatibility to merge in labels properly.
			$labels         = $this->get_labels();
			$trigger_labels = isset( $labels[ $trigger['id'] ] ) ? $labels[ $trigger['id'] ] : array();

			if ( ! empty( $trigger_labels ) ) {
				foreach ( $trigger_labels as $key => $value ) {
					if ( empty( $trigger[ $key ] ) ) {
						$trigger[ $key ] = $value;
					}
				}
			}

			// Remove cookie fields.
			if ( ! empty( $trigger['fields']['cookie'] ) ) {
				unset( $trigger['fields']['cookie'] );
			}

			// Add cookie fields for all triggers automatically.
			if ( empty( $trigger['fields']['general']['cookie_name'] ) ) {
				$trigger['fields']['general'] = array_merge( $trigger['fields']['general'], $this->cookie_fields() );
			}

			$this->triggers[ $trigger['id'] ] = apply_filters( 'pum_trigger', $trigger );
		}
	}

	/**
	 * Retrieves all initialized triggers.
	 *
	 * @return array The triggers
	 */
	public function get_triggers() {
		if ( ! isset( $this->triggers ) ) {
			$this->register_triggers();
		}

		return $this->triggers;
	}

	/**
	 * Retrieves a single trigger by the trigger key
	 *
	 * @param string|null $trigger The key for the trigger.
	 * @return mixed|null The trigger array or null if none found
	 */
	public function get_trigger( $trigger = null ) {
		$triggers = $this->get_triggers();

		return isset( $triggers[ $trigger ] ) ? $triggers[ $trigger ] : null;
	}

	/**
	 * @param null  $trigger
	 * @param array $settings
	 *
	 * @return array
	 * @deprecated
	 *
	 */
	public function validate_trigger( $trigger = null, $settings = array() ) {
		return $settings;
	}

	/**
	 * Registers all known triggers when called.
	 *
	 * @uses PUM_Triggers::add_triggers()
	 */
	public function register_triggers() {
		$triggers = apply_filters(
			'pum_registered_triggers',
			array(
				'click_open'      => array(
					'name'            => __( 'Click Open', 'popup-maker' ),
					'modal_title'     => __( 'Click Trigger Settings', 'popup-maker' ),
					'settings_column' => sprintf( '<strong>%1$s</strong>: %2$s', __( 'Extra Selectors', 'popup-maker' ), '{{data.extra_selectors}}' ),
					'fields'          => array(
						'general'  => array(
							'click_info'      => array(
								'type'    => 'html',
								'content' => '<p>' . __( 'Adding the class "popmake-<span id="pum-default-click-trigger-class">{popup-ID}</span>" to an element will trigger it to be opened once clicked. Additionally you can add additional CSS selectors below.', 'popup-maker' ) . '</p>',
							),
							'extra_selectors' => array(
								'label'       => __( 'Extra CSS Selectors', 'popup-maker' ),
								'desc'        => __( 'For more than one selector, separate by comma (,)', 'popup-maker' ) . '<br /><strong>eg:  </strong>' . __( ' .class-here, .class-2-here, #button_id', 'popup-maker' ),
								'placeholder' => __( '.class-here', 'popup-maker' ),
								'doclink'     => 'https://docs.wppopupmaker.com/article/147-getting-css-selectors?utm_campaign=contextual-help&utm_medium=inline-doclink&utm_source=plugin-popup-editor&utm_content=extra-selectors',
							),
						),
						'advanced' => array(
							'do_default' => array(
								'type'  => 'checkbox',
								'label' => __( 'Do not prevent the default click functionality.', 'popup-maker' ),
								'desc'  => __( 'This prevents us from disabling the browsers default action when a trigger is clicked. It can be used to allow a link to a file to both trigger a popup and still download the file.', 'popup-maker' ),
							),
						),
					),
				),
				'auto_open'       => array(
					'name'            => __( 'Time Delay / Auto Open', 'popup-maker' ),
					'modal_title'     => __( 'Time Delay Settings', 'popup-maker' ),
					'settings_column' => sprintf( '<strong>%1$s</strong>: %2$s', __( 'Delay', 'popup-maker' ), '{{data.delay}}' ),
					'fields'          => array(
						'general' => array(
							'delay' => array(
								'type'  => 'rangeslider',
								'label' => __( 'Delay', 'popup-maker' ),
								'desc'  => __( 'The delay before the popup will open in milliseconds.', 'popup-maker' ),
								'std'   => 500,
								'min'   => 0,
								'max'   => 10000,
								'step'  => 500,
								'unit'  => 'ms',
							),
						),
					),
				),
				'form_submission' => array(
					'name'   => __( 'Form Submission', 'popup-maker' ),
					//'settings_column' => sprintf( '<strong>%1$s</strong>: %2$s', __( 'Form', 'popup-maker' ), '' ),
					'fields' => array(
						'general' => array(
							'form'  => array(
								'type'    => 'select',
								'label'   => __( 'Form', 'popup-maker' ),
								'options' => $this->preload_posts ? array_merge(
									array(
										'any' => __( 'Any Supported Form*', 'popup-maker' ),
										__( 'Popup Maker', 'popup-maker' ) => array(
											'pumsubform' => __( 'Subscription Form', 'popup-maker' ),
										),
									),
									PUM_Integrations::get_integrated_forms_selectlist()
								) : array(),
								'std'     => 'any',
							),
							'delay' => array(
								'type'  => 'rangeslider',
								'label' => __( 'Delay', 'popup-maker' ),
								'desc'  => __( 'The delay before the popup will open in milliseconds.', 'popup-maker' ),
								'std'   => 0,
								'min'   => 0,
								'max'   => 10000,
								'step'  => 500,
								'unit'  => 'ms',
							),
						),
					),
				),
			)
		);

		foreach ( $triggers as $key => $trigger ) {
			$triggers[ $key ]['fields'] = PUM_Admin_Helpers::parse_tab_fields(
				$triggers[ $key ]['fields'],
				array(
					'has_subtabs' => false,
					'name'        => '%s',
				)
			);
		}

		// @deprecated filter.
		$old_triggers = apply_filters( 'pum_get_triggers', array() );

		foreach ( $old_triggers as $type => $trigger ) {
			if ( isset( $triggers[ $type ] ) ) {
				continue;
			}

			if ( ! empty( $trigger['fields'] ) ) {
				foreach ( $trigger['fields'] as $tab_id => $tab_fields ) {
					foreach ( $tab_fields as $field_id => $field ) {
						if ( ! empty( $field['options'] ) ) {
							$trigger['fields'][ $tab_id ][ $field_id ]['options'] = array_flip( $trigger['fields'][ $tab_id ][ $field_id ]['options'] );
						}
					}
				}
			}

			$triggers[ $type ] = $trigger;
		}

		$this->add_triggers( $triggers );
	}

	/**
	 * Prepares an array to create a dropdown list of triggers
	 *
	 * @return array An array of triggers with ID as key and name as value
	 */
	public function dropdown_list() {
		$_triggers = $this->get_triggers();
		$triggers  = array();

		foreach ( $_triggers as $id => $trigger ) {
			$triggers[ $id ] = $trigger['name'];
		}

		return $triggers;
	}

	/**
	 * Returns the cookie fields used for trigger options.
	 *
	 * @return array
	 * @uses filter pum_trigger_cookie_fields
	 */
	public function cookie_fields() {

		/**
		 * Filter the array of default trigger cookie fields.
		 *
		 * @param array $fields The list of trigger cookie fields.
		 */
		return apply_filters(
			'pum_trigger_cookie_fields',
			array(
				'cookie_name' => $this->cookie_field(),
			)
		);
	}

	/**
	 * Returns the cookie field used for trigger options.
	 *
	 * @return array
	 * @uses filter pum_trigger_cookie_field
	 */
	public function cookie_field() {

		/**
		 * Filter the array of default trigger cookie field.
		 *
		 * @param array $fields The list of trigger cookie field.
		 */
		return apply_filters(
			'pum_trigger_cookie_field',
			array(
				'label'    => __( 'Cookie Name', 'popup-maker' ),
				'desc'     => __( 'Choose which cookies will disable this trigger?', 'popup-maker' ),
				'type'     => 'select',
				'multiple' => true,
				'as_array' => true,
				'select2'  => true,
				'priority' => 99,
				'options'  => array(
					'add_new' => __( 'Add New Cookie', 'popup-maker' ),
				),
			)
		);
	}

	/**
	 * Returns an array of section labels for all triggers.
	 *
	 * Use the filter pum_get_trigger_section_labels to add or modify labels.
	 *
	 * @return array
	 */
	public function get_tabs() {
		/**
		 * Filter the array of trigger section labels.
		 *
		 * @param array $to_do The list of trigger section labels.
		 */
		return apply_filters(
			'pum_get_trigger_tabs',
			array(
				'general'  => __( 'General', 'popup-maker' ),
				'cookie'   => __( 'Cookie', 'popup-maker' ),
				'advanced' => __( 'Advanced', 'popup-maker' ),
			)
		);
	}

	/**
	 * Returns an array of trigger labels.
	 *
	 * Use the filter pum_get_trigger_labels to add or modify labels.
	 *
	 * @return array
	 */
	public function get_labels() {
		static $labels;

		if ( ! isset( $labels ) ) {
			/**
			 * Filter the array of trigger labels.
			 *
			 * @param array $to_do The list of trigger labels.
			 */
			$labels = apply_filters( 'pum_get_trigger_labels', array() );
		}

		return $labels;
	}


}