<?php

namespace Tribe\Extensions\Relabeler;

use Tribe__Settings_Manager;

if ( ! class_exists( Settings::class ) ) {
	/**
	 * Do the Settings.
	 */
	class Settings {

		/**
		 * The Settings Helper class.
		 *
		 * @var Settings_Helper
		 */
		protected $settings_helper;

		/**
		 * The prefix for our settings keys.
		 *
		 * @see get_options_prefix() Use this method to get this property's value.
		 *
		 * @var string
		 */
		private $options_prefix = 'tribe_ext_relabeler';

		/**
		 * Settings constructor.
		 *
		 * @param string $options_prefix Recommended: the plugin text domain, with hyphens converted to underscores.
		 */
		public function __construct( $options_prefix ) {
			$this->settings_helper = new Settings_Helper();

			$this->set_options_prefix( $options_prefix );

			// Add settings specific to OSM
			add_action( 'admin_init', [ $this, 'add_settings' ] );
		}

		/**
		 * Allow access to set the Settings Helper property.
		 *
		 * @see get_settings_helper()
		 *
		 * @param Settings_Helper $helper
		 *
		 * @return Settings_Helper
		 */
		public function set_settings_helper( Settings_Helper $helper ) {
			$this->settings_helper = $helper;

			return $this->get_settings_helper();
		}

		/**
		 * Allow access to get the Settings Helper property.
		 *
		 * @see set_settings_helper()
		 */
		public function get_settings_helper() {
			return $this->settings_helper;
		}

		/**
		 * Set the options prefix to be used for this extension's settings.
		 *
		 * Recommended: the plugin text domain, with hyphens converted to underscores.
		 * Is forced to end with a single underscore. All double-underscores are converted to single.
		 *
		 * @see get_options_prefix()
		 *
		 * @param string $options_prefix
		 */
		private function set_options_prefix( $options_prefix ) {
			$options_prefix = $options_prefix . '_';

			$this->options_prefix = str_replace( '__', '_', $options_prefix );
		}

		/**
		 * Get this extension's options prefix.
		 *
		 * @see set_options_prefix()
		 *
		 * @return string
		 */
		public function get_options_prefix() {
			return $this->options_prefix;
		}

		/**
		 * Given an option key, get this extension's option value.
		 *
		 * This automatically prepends this extension's option prefix so you can just do `$this->get_option( 'a_setting' )`.
		 *
		 * @see tribe_get_option()
		 *
		 * @param string $key
		 *
		 * @return mixed
		 */
		public function get_option( $key = '', $default = '' ) {
			$key = $this->sanitize_option_key( $key );

			return tribe_get_option( $key, $default );
		}

		/**
		 * Get an option key after ensuring it is appropriately prefixed.
		 *
		 * @param string $key
		 *
		 * @return string
		 */
		private function sanitize_option_key( $key = '' ) {
			$prefix = $this->get_options_prefix();

			if ( 0 === strpos( $key, $prefix ) ) {
				$prefix = '';
			}

			return $prefix . $key;
		}

		/**
		 * Get an array of all of this extension's options without array keys having the redundant prefix.
		 *
		 * @return array
		 */
		public function get_all_options() {
			$raw_options = $this->get_all_raw_options();

			$result = [];

			$prefix = $this->get_options_prefix();

			foreach ( $raw_options as $key => $value ) {
				$abbr_key            = str_replace( $prefix, '', $key );
				$result[ $abbr_key ] = $value;
			}

			return $result;
		}

		/**
		 * Get an array of all of this extension's raw options (i.e. the ones starting with its prefix).
		 *
		 * @return array
		 */
		public function get_all_raw_options() {
			$tribe_options = Tribe__Settings_Manager::get_options();

			if ( ! is_array( $tribe_options ) ) {
				return [];
			}

			$result = [];

			foreach ( $tribe_options as $key => $value ) {
				if ( 0 === strpos( $key, $this->get_options_prefix() ) ) {
					$result[ $key ] = $value;
				}
			}

			return $result;
		}

		/**
		 * Given an option key, delete this extension's option value.
		 *
		 * This automatically prepends this extension's option prefix so you can just do `$this->delete_option( 'a_setting' )`.
		 *
		 * @param string $key
		 *
		 * @return mixed
		 */
		public function delete_option( $key = '' ) {
			$key = $this->sanitize_option_key( $key );

			$options = Tribe__Settings_Manager::get_options();

			unset( $options[ $key ] );

			return Tribe__Settings_Manager::set_options( $options );
		}

		/**
		 * Adds a new section of fields to Events > Settings > Display tab, appearing after the "Basic Template" section
		 * and before the "Date Format Settings" section.
		 */
		public function add_settings() {

			$fields = [
				'labels_heading' => [
					'type' => 'html',
					'html' => '<h3>' . esc_html__( 'Labels', 'tribe-ext-relabeler' ) . '</h3>',
				],
				'labels_helper_text' => [
					'type' => 'html',
					'html' => '<p>' . esc_html__( 'The following fields allow you to change the default labels. Inputting something other than the default will change that word everywhere it appears.', 'tribe-ext-relabeler' ) . '</p>',
				],
				'label_event_single' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Event', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Event', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Singular label for Events.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_event_single_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'event', 'the-events-calendar' ),
					'default'         => esc_attr__( 'event', 'the-events-calendar' ),
					'tooltip'         => sprintf(
						esc_html__( 'Lowercase singular label for Events. You might wish to also modify the "Events URL Slug" found in the %s events settings tab.', 'tribe-ext-relabeler' ),
						$this->general_settings_tab_link()
					),
					'validation_type' => 'html',
				],
				'label_event_plural' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Events', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Events', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Plural label for Events.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_event_plural_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'events', 'the-events-calendar' ),
					'default'         => esc_attr__( 'events', 'the-events-calendar' ),
					'tooltip'         => sprintf(
						esc_html__( 'Lowercase plural label for Events. You might wish to also modify the "Single Event URL Slug" found in the %s events settings tab.', 'tribe-ext-relabeler' ),
						$this->general_settings_tab_link()
					),
					'validation_type' => 'html',
				],
				'label_venue_single' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Venue', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Venue', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Singular label for Venues.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_venue_single_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'venue', 'the-events-calendar' ),
					'default'         => esc_attr__( 'venue', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Lowercase singular label for Venues.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_venue_plural' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Venues', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Venues', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Plural label for Venues.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_venue_plural_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'venues', 'the-events-calendar' ),
					'default'         => esc_attr__( 'venues', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Lowercase plural label for Venues.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_organizer_single' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Organizer', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Organizer', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Singular label for Organizers.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_organizer_single_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'organizer', 'the-events-calendar' ),
					'default'         => esc_attr__( 'organizer', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Lowercase singular label for Organizers.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_organizer_plural' => [
					'type'            => 'text',
					'label'           => esc_html__( 'Organizers', 'the-events-calendar' ),
					'default'         => esc_attr__( 'Organizers', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Plural label for Organizers.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
				'label_organizer_plural_lowercase' => [
					'type'            => 'text',
					'label'           => esc_html__( 'organizers', 'the-events-calendar' ),
					'default'         => esc_attr__( 'organizers', 'the-events-calendar' ),
					'tooltip'         => esc_html__( 'Lowercase plural label for Organizers.', 'tribe-ext-relabeler' ),
					'validation_type' => 'html',
				],
			];

			$this->settings_helper->add_fields(
				$this->prefix_settings_field_keys( $fields ),
				'display',
				'tribeEventsDateFormatSettingsTitle',
				true
			);
		}

		/**
		 * Add the options prefix to each of the array keys.
		 *
		 * @param array $fields
		 *
		 * @return array
		 */
		private function prefix_settings_field_keys( array $fields ) {
			$prefixed_fields = array_combine(
				array_map(
					function ( $key ) {
						return $this->get_options_prefix() . $key;
					}, array_keys( $fields )
				),
				$fields
			);

			return (array) $prefixed_fields;
		}

		/**
		 * Get an HTML link to the General settings tab
		 *
		 * @return string HTML link element to the general settings tab
		 */
		protected function general_settings_tab_link() {
			$url = \Tribe__Settings::instance()->get_url( [ 'tab' => 'general' ] );

			return sprintf(
				'<a href="%2$s">%1$s</a>',
				esc_html__( 'General', 'tribe-common' ),
				esc_url( $url )
			);
		}

	} // class
}