<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
 * Hustle_ConvertKit_Form_Hooks class
 *
 * @package Hustle
 */

/**
 * Class Hustle_ConvertKit_Form_Hooks
 * Define the form hooks that are used by ConvertKit
 *
 * @since 4.0
 */
class Hustle_ConvertKit_Form_Hooks extends Hustle_Provider_Form_Hooks_Abstract {

	/**
	 * Add ConvertKit data to entry.
	 *
	 * @since 4.0
	 *
	 * @param array $submitted_data Submitted data.
	 * @return array
	 * @throws Exception Required fields are missed.
	 */
	public function add_entry_fields( $submitted_data ) {

		$addon     = $this->addon;
		$module_id = $this->module_id;
		$module    = Hustle_Module_Model::new_instance( $module_id );
		if ( is_wp_error( $module ) ) {
			return;
		}
		$form_settings_instance = $this->form_settings_instance;

		/**
		 * Filter submitted form data to be processed
		 *
		 * @since 4.0
		 *
		 * @param array                                    $submitted_data
		 * @param int                                      $module_id                current module_id
		 * @param Hustle_ConvertKit_Form_Settings          $form_settings_instance
		 */
		$submitted_data = apply_filters(
			'hustle_provider_convertkit_form_submitted_data',
			$submitted_data,
			$module_id,
			$form_settings_instance
		);

		$addon_setting_values = $form_settings_instance->get_form_settings_values();

		try {
			$global_multi_id = $addon_setting_values['selected_global_multi_id'];
			$api_key         = $addon->get_setting( 'api_key', '', $global_multi_id );
			$api_secret      = $addon->get_setting( 'api_secret', '', $global_multi_id );
			$api             = $addon::api( $api_key, $api_secret );

			if ( empty( $submitted_data['email'] ) ) {
				throw new Exception( __( 'Required Field "email" was not filled by the user.', 'hustle' ) );
			}

			$list_id         = $addon_setting_values['list_id'];
			$submitted_data  = $this->check_legacy( $submitted_data );
			$existing_member = $this->get_subscriber(
				$api,
				array(
					'email'   => $submitted_data['email'],
					'list_id' => $list_id,
				)
			);
			$is_sent         = false;
			$member_status   = __( 'Member could not be subscribed.', 'hustle' );

			// deal with custom fields first.
			$custom_fields = array(
				'ip_address' => array(
					'label' => 'IP Address',
				),
			);
			// Extra fields.
			$additional_fields     = array_diff_key(
				$submitted_data,
				array(
					'email'      => '',
					'first_name' => '',
				)
			);
			$additional_fields     = array_filter( $additional_fields );
			$subscribe_data_fields = array();

			if ( $additional_fields && is_array( $additional_fields ) && count( $additional_fields ) > 0 ) {
				foreach ( $additional_fields as $field_name => $value ) {
					$meta_key   = 'cv_field_' . $field_name;
					$meta_value = $module->get_meta( $meta_key );

					if ( ! $meta_value || $meta_value !== $field_name ) {
						$custom_fields[ $field_name ] = array(
							'label' => $field_name,
						);
					}

					if ( isset( $submitted_data[ $field_name ] ) ) {
						$subscribe_data_fields[ $field_name ] = $submitted_data[ $field_name ];
					}
				}
			}

			if ( ! $addon->maybe_create_custom_fields( $global_multi_id, $custom_fields ) ) {
				$details = __( 'Unable to add custom field.', 'hustle' );
			} else {
				// subscription.
				$name = isset( $submitted_data['first_name'] ) ? $submitted_data['first_name'] : '';

				$subscribe_data           = array(
					'api_key'    => $api_key,
					'first_name' => $name,
					'email'      => $submitted_data['email'],
					'fields'     => array(
						'ip_address' => Opt_In_Geo::get_user_ip(),
					),
				);
				$subscribe_data['fields'] = wp_parse_args( $subscribe_data_fields, $subscribe_data['fields'] );

				/**
				 * Fires before adding subscriber
				 *
				 * @since 4.0.2
				 *
				 * @param int    $module_id
				 * @param array  $submitted_data
				 * @param object $form_settings_instance
				 */
				do_action(
					'hustle_provider_convertkit_before_add_subscriber',
					$module_id,
					$submitted_data,
					$form_settings_instance
				);

				if ( false !== $existing_member ) {
					$res = $api->update_subscriber( $existing_member, $subscribe_data );
				} else {
					$forms = $api->get_forms();
					$lists = is_array( $forms ) ? wp_list_pluck( $forms, 'id' ) : array();
					if ( in_array( (int) $list_id, $lists, true ) ) {
						$res = $api->subscribe( $list_id, $subscribe_data );
					} else {
						$res = new WP_Error( 'convertkit_list_doesnt_exist', __( 'ConvertKit list doesn\'t exist.', 'hustle' ) );
					}
				}

				/**
				 * Fires after adding subscriber
				 *
				 * @since 4.0.2
				 *
				 * @param int    $module_id
				 * @param array  $submitted_data
				 * @param mixed  $res
				 * @param object $form_settings_instance
				 */
				do_action(
					'hustle_provider_convertkit_after_add_subscriber',
					$module_id,
					$submitted_data,
					$res,
					$form_settings_instance
				);

				if ( is_wp_error( $res ) ) {
					$details = $res->get_error_message();
				} elseif ( empty( $res ) ) {
					$details = __( 'Something went wrong', 'hustle' );
				} else {
					$is_sent = true;
					$details = __( 'Successfully added or updated member on ConvertKit list', 'hustle' );

				}

				if ( ! empty( $res->subscription->state ) ) {
					$member_status = $res->subscription->state;
				}
			}

			$entry_fields = array(
				array(
					'name'  => 'status',
					'value' => array(
						'is_sent'       => $is_sent,
						'description'   => $details,
						'member_status' => $member_status,
					),
				),
			);
		} catch ( Exception $e ) {
			$entry_fields = $this->exception( $e );
		}

		if ( ! empty( $addon_setting_values['list_name'] ) ) {
			$entry_fields[0]['value']['list_name'] = $addon_setting_values['list_name'];
		}

		$entry_fields = apply_filters(
			'hustle_provider_convertkit_entry_fields',
			$entry_fields,
			$module_id,
			$submitted_data,
			$form_settings_instance
		);

		return $entry_fields;
	}

	/**
	 * Unsubscribe
	 *
	 * @param string $email Email.
	 */
	public function unsubscribe( $email ) {
		$addon                  = $this->addon;
		$form_settings_instance = $this->form_settings_instance;
		$addon_setting_values   = $form_settings_instance->get_form_settings_values();
		$list_id                = $addon_setting_values['list_id'];
		$global_multi_id        = $addon_setting_values['selected_global_multi_id'];
		$api_key                = $addon->get_setting( 'api_key', '', $global_multi_id );
		$api_secret             = $addon->get_setting( 'api_secret', '', $global_multi_id );
		try {
			$api = $addon::api( $api_key, $api_secret );
			$api->delete_email( $list_id, $email );
		} catch ( Exception $e ) {
			Opt_In_Utils::maybe_log( $addon->get_slug(), 'unsubscribtion is failed', $e->getMessage() );
		}
	}

	/**
	 * Check whether the email is already subscribed.
	 *
	 * @since 4.0
	 *
	 * @param array $submitted_data Submitted data.
	 * @param bool  $allow_subscribed Allow already subscribed.
	 * @return bool
	 */
	public function on_form_submit( $submitted_data, $allow_subscribed = true ) {

		$is_success             = true;
		$module_id              = $this->module_id;
		$form_settings_instance = $this->form_settings_instance;
		$addon                  = $this->addon;
		$addon_setting_values   = $form_settings_instance->get_form_settings_values();

		if ( empty( $submitted_data['email'] ) ) {
			return __( 'Required Field "email" was not filled by the user.', 'hustle' );
		}

		if ( ! $allow_subscribed ) {

			/**
			 * Filter submitted form data to be processed
			 *
			 * @since 4.0
			 *
			 * @param array                                    $submitted_data
			 * @param int                                      $module_id                current module_id
			 * @param Hustle_ConvertKit_Form_Settings          $form_settings_instance
			 */
			$submitted_data = apply_filters(
				'hustle_provider_convertkit_form_submitted_data_before_validation',
				$submitted_data,
				$module_id,
				$form_settings_instance
			);

			// triggers exception if not found.
			$global_multi_id = $addon_setting_values['selected_global_multi_id'];
			$api_key         = $addon->get_setting( 'api_key', '', $global_multi_id );
			$api_secret      = $addon->get_setting( 'api_secret', '', $global_multi_id );
			$api             = $addon::api( $api_key, $api_secret );
			$list_id         = $addon_setting_values['list_id'];

			$existing_member = $this->get_subscriber(
				$api,
				array(
					'email'   => $submitted_data['email'],
					'list_id' => $list_id,
				)
			);

			if ( $existing_member ) {
				$is_success = self::ALREADY_SUBSCRIBED_ERROR;
			}
		}

		/**
		 * Return `true` if success, or **(string) error message** on fail
		 *
		 * @since 4.0
		 *
		 * @param bool                                     $is_success
		 * @param int                                      $module_id                current module_id
		 * @param array                                    $submitted_data
		 * @param Hustle_ConvertKit_Form_Settings          $form_settings_instance
		 */
		$is_success = apply_filters(
			'hustle_provider_convertkit_form_submitted_data_after_validation',
			$is_success,
			$module_id,
			$submitted_data,
			$form_settings_instance
		);

		// process filter.
		if ( true !== $is_success ) {
			// only update `submit_form_error_message` when not empty.
			if ( ! empty( $is_success ) ) {
				$this->submit_form_error_message = (string) $is_success;
			}
			return $is_success;
		}

		return true;
	}

	/**
	 * Get subscriber for providers
	 *
	 * This method is to be inherited
	 * And extended by child classes.
	 *
	 * Make use of the property `$subscriber`
	 * Method to omit double api calls
	 *
	 * @since 4.0.2
	 *
	 * @param   object $api Api.
	 * @param   mixed  $data Data.
	 * @return  mixed   array/object API response on queried subscriber
	 */
	protected function get_subscriber( $api, $data ) {
		if ( empty( $this->subscriber ) && ! isset( $this->subscriber[ md5( $data['email'] ) ] ) ) {
			$this->subscriber[ md5( $data['email'] ) ] = $api->is_form_subscriber( $data['email'], $data['list_id'] );
		}
		return $this->subscriber[ md5( $data['email'] ) ];
	}
}
