<?php

/**
 * Helper class for the Mailrelay API.
 *
 * @since 1.5.4
 */
final class FLBuilderServiceMailrelay extends FLBuilderService {

	/**
	 * The ID for this service.
	 *
	 * @since 1.5.4
	 * @var string $id
	 */
	public $id = 'mailrelay';

	/**
	 * The API url suffix for this service.
	 *
	 * @since 1.5.8
	 * @access private
	 * @var string $api_url
	 */
	private $api_url = '/ccm/admin/api/version/2/&type=json';

	/**
	 * Request data from the thir party API.
	 *
	 * @since 1.5.4
	 * @param string $base_url Base URL where API is available
	 * @param string $method Method to request available from this service.
	 * @param array $params Data to be passed to API
	 * @return array|object The API response.
	 */
	private function get_api_response( $base_url, $params )
	{
		// Exclude http:// for the specific service
		$base_url = preg_replace('#^https?://#', '', $base_url);
		$response = wp_remote_post( 'https://'. $base_url . $this->api_url, array( 'timeout' => 60, 'body' => $params ) );

		if (is_wp_error($response) || (isset($response->status) && $response->status == 0)) {
			if (isset($response->status)) {
				$data = json_decode($response, true);
			}
			else {
				$data['error'] = $response->get_error_message();
			}

		} else {
			$data = json_decode(wp_remote_retrieve_body( $response ), true);
		}
		return $data;
	}

	/**
	 * Test the API connection.
	 *
	 * @since 1.5.4
	 * @param array $fields {
	 *      @type string $api_host A valid Host.
	 *      @type string $api_key A valid API key.
	 * }
	 * @return array{
	 *      @type bool|string $error The error message or false if no error.
	 *      @type array $data An array of data used to make the connection.
	 * }
	 */
	public function connect( $fields = array() )
	{
		$response = array(
			'error'  => false,
			'data'   => array()
		);

		// Make sure we have the Host.
		if ( ! isset( $fields['api_host'] ) || empty( $fields['api_host'] ) ) {
			$response['error'] = __( 'Error: You must provide a Host.', 'fl-builder' );
		}
		// Make sure we have an API key.
		else if ( ! isset( $fields['api_key'] ) || empty( $fields['api_key'] ) ) {
			$response['error'] = __( 'Error: You must provide an API key.', 'fl-builder' );
		}
		// Try to connect and store the connection data.
		else {

			$result = $this->get_api_response( $fields['api_host'], array(
				'function'  => 'getGroups',
				'apiKey'	=> $fields['api_key'],
				'offset' 	=> 0,
				'count' => 1
			) );

			if (!isset($result['error'])) {
				$response['data'] = array( 'api_host' => $fields['api_host'], 'api_key' => $fields['api_key'] );
			}
			else {
				$response['error'] = sprintf(__( 'Error: Could not connect to Mailrelay. %s', 'fl-builder' ), $result['error']);
			}
		}

		return $response;
	}

	/**
	 * Renders the markup for the connection settings.
	 *
	 * @since 1.5.4
	 * @return string The connection settings markup.
	 */
	public function render_connect_settings()
	{
		ob_start();

		FLBuilder::render_settings_field( 'api_host', array(
			'row_class'     => 'fl-builder-service-connect-row',
			'class'         => 'fl-builder-service-connect-input',
			'type'          => 'text',
			'label'         => __( 'Host', 'fl-builder' ),
			'help'          => __( 'The host you chose when you signed up for your account. Check your welcome email if you forgot it. Please enter it without the initial http:// (e.g. demo.ip-zone.com).', 'fl-builder' ),
			'preview'       => array(
				'type'          => 'none'
			)
		));

		FLBuilder::render_settings_field( 'api_key', array(
			'row_class'     => 'fl-builder-service-connect-row',
			'class'         => 'fl-builder-service-connect-input',
			'type'          => 'text',
			'label'         => __( 'API Key', 'fl-builder' ),
			'help'          => __( 'Your API key can be found in your Mailrelay account under Menu > Settings > API access.', 'fl-builder' ),
			'preview'       => array(
				'type'          => 'none'
			)
		));

		return ob_get_clean();
	}

	/**
	 * Render the markup for service specific fields.
	 *
	 * @since 1.5.4
	 * @param string $account The name of the saved account.
	 * @param object $settings Saved module settings.
	 * @return array {
	 *      @type bool|string $error The error message or false if no error.
	 *      @type string $html The field markup.
	 * }
	 */
	public function render_fields( $account, $settings )
	{
		$account_data   = $this->get_account_data( $account );
		$result = $this->get_api_response( $account_data['api_host'], array(
							'function'  => 'getGroups',
							'apiKey'	=> $account_data['api_key']
		) );

		$response       = array(
			'error'         => false,
			'html'          => ''
		);

		if ( isset($result['error']) ) {
			$response['error'] = sprintf(__( 'Error: Please check your API key. %s', 'fl-builder' ), $result['error']);
		}
		else {
			$response['html'] = $this->render_list_field( $result['data'], $settings );
		}

		return $response;
	}

	/**
	 * Render markup for the list field.
	 *
	 * @since 1.5.4
	 * @param array $lists List data from the API.
	 * @param object $settings Saved module settings.
	 * @return string The markup for the list field.
	 * @access private
	 */
	private function render_list_field( $groups, $settings )
	{
		ob_start();

		$options = array( '' => __( 'Choose...', 'fl-builder' ) );

		foreach ( $groups as $group ) {
			$options[ $group['id'] ] = $group['name'];
		}

		FLBuilder::render_settings_field( 'list_id', array(
			'row_class'     => 'fl-builder-service-field-row',
			'class'         => 'fl-builder-service-list-select',
			'type'          => 'select',
			'multi-select'  => true,
			'label'         => _x( 'Group', 'A list of subscribers group from a Mailrelay account.', 'fl-builder' ),
			'options'       => $options,
			'preview'       => array(
				'type'          => 'none'
			)
		), $settings);

		return ob_get_clean();
	}

	/**
	 * Subscribe an email address to Mailrelay.
	 *
	 * @since 1.5.4
	 * @param object $settings A module settings object.
	 * @param string $email The email to subscribe.
	 * @param string $name Optional. The full name of the person subscribing.
	 * @return array {
	 *      @type bool|string $error The error message or false if no error.
	 * }
	 */
	public function subscribe( $settings, $email, $name = '' )
	{
		$account_data = $this->get_account_data( $settings->service_account );
		$response     = array( 'error' => false );

		if ( ! $account_data ) {
			$response['error'] = __( 'There was an error subscribing to Mailrelay. The account is no longer connected.', 'fl-builder' );
		}
		else {

			$result = $this->get_api_response( $account_data['api_host'], array(
						'function'  => 'addSubscriber',
						'apiKey'	=> $account_data['api_key'],
						'email'     => $email,
						'name'		=> $name,
						'groups'	=> $settings->list_id,
			) );

			if (isset($result['error'])) {
				$response['error'] = sprintf(__( 'There was an error subscribing to Mailrelay. %s', 'fl-builder' ), $result['error']);
			}
		}

		return $response;
	}
}
