<?php

/**
 * Global helper functions for Aisentic plugin
 *
 * @package Aisentic\Util
 */

defined( 'ABSPATH' ) || exit;

use Aisentic\Api\Models\Settings;

if ( ! function_exists( 'aisentic_get_option' ) ) {
	/**
	 * Get Aisentic setting value
	 *
	 * @param string|null $path    Dot-notation path (e.g., 'publicChat.model'). If null, returns all settings.
	 * @param mixed       $default Default value if path not found.
	 * @return mixed Setting value or default.
	 */
	function aisentic_get_option( $path = null, $default = null ) {
		$settings = new Settings();

		if ( null === $path ) {
			return $settings->getAll();
		}

		return $settings->get( $path, $default );
	}
}

if ( ! function_exists( 'aisentic_update_option' ) ) {
	/**
	 * Update Aisentic setting value
	 *
	 * @param string $path  Dot-notation path (e.g., 'publicChat.model').
	 * @param mixed  $value Value to set.
	 * @return bool True on success, false on failure.
	 */
	function aisentic_update_option( $path, $value ) {
		$settings = new Settings();
		$settings->set( $path, $value );

		$all_settings = $settings->getAll();
		return $settings->save( $all_settings );
	}
}

if ( ! function_exists( 'aisentic_timezone_string' ) ) {
	/**
	 * Site timezone as an IANA name or UTC offset string.
	 *
	 * WP-5.2-compatible reimplementation of core's wp_timezone_string()
	 * (added in WP 5.3): reads the same options and returns an identical
	 * value, so behaviour matches core on 5.3+ while remaining safe on 5.2.
	 *
	 * @return string Timezone identifier (e.g. 'Europe/London') or offset (e.g. '+05:30').
	 */
	function aisentic_timezone_string(): string {
		$timezone_string = get_option( 'timezone_string' );

		if ( $timezone_string ) {
			return $timezone_string;
		}

		$offset  = (float) get_option( 'gmt_offset' );
		$hours   = (int) $offset;
		$minutes = ( $offset - $hours );

		$sign      = ( $offset < 0 ) ? '-' : '+';
		$abs_hour  = abs( $hours );
		$abs_mins  = abs( $minutes * 60 );
		$tz_offset = sprintf( '%s%02d:%02d', $sign, $abs_hour, $abs_mins );

		return $tz_offset;
	}
}

if ( ! function_exists( 'aisentic_current_datetime' ) ) {
	/**
	 * Current date/time as an immutable object in the site timezone.
	 *
	 * WP-5.2-compatible reimplementation of core's current_datetime()
	 * (added in WP 5.3), built on aisentic_timezone_string().
	 *
	 * @return \DateTimeImmutable
	 */
	function aisentic_current_datetime(): \DateTimeImmutable {
		return new \DateTimeImmutable( 'now', new \DateTimeZone( aisentic_timezone_string() ) );
	}
}