<?php
/**
 * What the plugin stores. Two options: the connection (which agent, set by Connect or the manual
 * key) and the display settings (the form on Settings › ReplyBash).
 */

defined( 'ABSPATH' ) || exit;

class ReplyBash_Options {
	const CONNECTION = 'replybash_connection';
	const SETTINGS   = 'replybash_settings';

	/** @return array{key: string, agent: string, workspace: string} */
	public static function connection() {
		$c = get_option( self::CONNECTION, array() );
		return array(
			'key'       => isset( $c['key'] ) ? (string) $c['key'] : '',
			'agent'     => isset( $c['agent'] ) ? (string) $c['agent'] : '',
			'workspace' => isset( $c['workspace'] ) ? (string) $c['workspace'] : '',
		);
	}

	public static function connect( $key, $agent = '', $workspace = '' ) {
		update_option(
			self::CONNECTION,
			array(
				'key'       => $key,
				'agent'     => sanitize_text_field( $agent ),
				'workspace' => sanitize_text_field( $workspace ),
			)
		);
	}

	public static function disconnect() {
		delete_option( self::CONNECTION );
	}

	/** The agent's public key as ReplyBash makes them (acme_7Hq2k), or '' when it isn't one. */
	public static function clean_key( $key ) {
		$key = trim( (string) $key );
		return preg_match( '/^[A-Za-z0-9_-]{3,64}$/', $key ) ? $key : '';
	}

	public static function defaults() {
		return array(
			'enabled'         => 1,
			'pages_mode'      => 'all',
			'pages'           => '',
			'hide_staff'      => 0,
			'identify'        => 0,
			'identity_secret' => '',
		);
	}

	public static function settings() {
		return wp_parse_args( get_option( self::SETTINGS, array() ), self::defaults() );
	}

	/** register_setting's sanitize_callback: the form posts every field but the secret, which is kept when left empty. */
	public static function sanitize( $input ) {
		$old    = self::settings();
		$input  = is_array( $input ) ? $input : array();
		$mode   = isset( $input['pages_mode'] ) ? $input['pages_mode'] : 'all';
		$secret = isset( $input['identity_secret'] ) ? trim( (string) $input['identity_secret'] ) : '';
		$pages  = array();
		foreach ( preg_split( '/\r\n|\r|\n/', isset( $input['pages'] ) ? (string) $input['pages'] : '' ) as $line ) {
			$line = self::clean_path( $line );
			if ( '' !== $line ) {
				$pages[] = $line;
			}
		}
		return array(
			'enabled'         => empty( $input['enabled'] ) ? 0 : 1,
			'pages_mode'      => in_array( $mode, array( 'all', 'except', 'only' ), true ) ? $mode : 'all',
			'pages'           => implode( "\n", array_unique( $pages ) ),
			'hide_staff'      => empty( $input['hide_staff'] ) ? 0 : 1,
			'identify'        => empty( $input['identify'] ) ? 0 : 1,
			'identity_secret' => '' === $secret ? $old['identity_secret'] : sanitize_text_field( $secret ),
		);
	}

	/** "https://acme.com/Pricing/?x=1" → "/pricing", "blog/*" → "/blog/*". '' for blank lines. */
	public static function clean_path( $line ) {
		$line = trim( (string) $line );
		if ( '' === $line ) {
			return '';
		}
		$star = '*' === substr( $line, -1 );
		$path = wp_parse_url( $star ? substr( $line, 0, -1 ) : $line, PHP_URL_PATH );
		$path = '/' . trim( strtolower( (string) $path ), '/' );
		if ( $star ) {
			return '/' === $path ? '/*' : $path . '/*';
		}
		return $path;
	}
}