<?php
namespace FrontGlut\Core;

defined( 'ABSPATH' ) || exit;

/**
 * Single settings store (option frontglut_settings) with dot-notation access.
 */
class Settings {
	const OPTION = 'frontglut_settings';

	private static $cache = null;

	public static function defaults() {
		return apply_filters( 'frontglut_default_settings', array(
			'general' => array(
				'dashboard_page'   => 0,
				'login_page'       => 0,
				'register_page'    => 0,
				'lost_page'        => 0,
				'account_page'     => 0,
				'layout'           => 'canvas',
				'dashboard_title'  => __( 'Dashboard', 'frontglut' ),
				'show_credit'      => 0,
				'audit_retention'  => 90,
				'audit_full_ip'    => 0,
			),
			'theme'   => array(
				'primary' => '#2563eb',
				'radius'  => 10,
				'logo'    => '',
				'font'    => 'system',
				'mode'    => 'auto',
			),
		) );
	}

	public static function all() {
		if ( null === self::$cache ) {
			$saved       = get_option( self::OPTION, array() );
			self::$cache = self::merge( self::defaults(), is_array( $saved ) ? $saved : array() );
		}
		return self::$cache;
	}

	private static function merge( $base, $over ) {
		foreach ( $over as $k => $v ) {
			if ( is_array( $v ) && isset( $base[ $k ] ) && is_array( $base[ $k ] ) && self::is_assoc( $v ) ) {
				$base[ $k ] = self::merge( $base[ $k ], $v );
			} else {
				$base[ $k ] = $v;
			}
		}
		return $base;
	}

	private static function is_assoc( $a ) {
		return array() !== $a && array_keys( $a ) !== range( 0, count( $a ) - 1 );
	}

	public static function get( $path, $default = null ) {
		$node = self::all();
		foreach ( explode( '.', $path ) as $part ) {
			if ( ! is_array( $node ) || ! array_key_exists( $part, $node ) ) {
				return $default;
			}
			$node = $node[ $part ];
		}
		return $node;
	}

	public static function set( $path, $value ) {
		$saved = get_option( self::OPTION, array() );
		$saved = is_array( $saved ) ? $saved : array();
		$ref   = &$saved;
		foreach ( explode( '.', $path ) as $part ) {
			if ( ! isset( $ref[ $part ] ) || ! is_array( $ref[ $part ] ) ) {
				$ref[ $part ] = array();
			}
			$ref = &$ref[ $part ];
		}
		$ref = $value;
		unset( $ref );
		self::save( $saved );
	}

	public static function save( array $saved ) {
		update_option( self::OPTION, $saved, false );
		self::$cache = null;
	}

	public static function flush() {
		self::$cache = null;
	}
}