<?php

/**
 * Logo Switcher
 *
 * @author Iversen - Carpe Noctem
 * @link https://wordpress.org/plugins/logo-switcher/
 *
 */

namespace ICN\LogoSwitcher;

// Block direct access
if(!defined('ABSPATH'))exit;

class Plugin {

	/**
	* Add Theme Customize Support
	* 
	* @param WP_Customize_Manager $manager
	*/
	public static function add_theme_customize_support(\WP_Customize_Manager $manager) {
		// Add the image field
		$manager->add_setting('logo_switcher');
		$manager->add_control(
			new \WP_Customize_Image_Control(
				$manager,
				'logo_switcher',
				[
					'label'       => __('Choose your logo', 'logo-switcher'),
					'section'     => 'title_tagline',
					'description' => __('Note: The logo will replace the default WordPress logo on the login screen. This can be changed on the settings page of the plugin.', 'logo-switcher' )
				]
			)
		);
	}

	/**
	* Add the logo to the login page
	* 
	* Change the logo in the login page and also change the url href and title
	* 
	* @return boolean false if the option is disabled
	*/
	public static function add_login_support() {
		$setting = self::get_options();
		if (!$setting['enable-on-login-page']) {
			return false;
		}

		add_filter( 'login_headerurl', function() {
			return get_bloginfo('url');
		} );
		
		add_filter( 'login_headertitle', function() {
			$description = get_bloginfo('description');
			if(!empty($description)) {
				return get_bloginfo('description');
			} else {
				return get_bloginfo('name');
			}
		} );

		$url = static::get_logo_url();
			
		if(!empty($url)) {
			list($width, $height, $type, $attr) = getimagesize($url);
				
			if($height < 150) {
				$css_height = '20vh';
			} else {
				$css_height = '30vh';
			}
				
			print( "<style type='text/css'>.login h1 a {background-image: url('{$url}'); background-size: 100%; width:100%; height:{$css_height};}</style>" . PHP_EOL );
		} else {
			print( '<style type="text/css">.login h1 a {display:none}</style>' . PHP_EOL );
		}
	}

	/**
	* Get options
	*  
	* @return array
	*/
	public static function get_options() {
		$options = get_option( 'logo_switcher_settings' );
		$option = $options['logo_switcher_state'];
			
		if($option == 1) {
			$state = true;
		} elseif($option == 2) {
			$state = false;
		} else {
			$state = true;
		}
		
		$default = [
			// path for default logo image 
			'default' => '/logo.png',
			// the logo url (default to home page)
			'url' => esc_url( home_url( '/' ) ),
			// the logo desciption default to (get_bloginfo('name', 'display')) 
			'description' => get_bloginfo('name', 'display'),
			// enable logo display on the login page
			'enable-on-login-page' => $state,
		];
			
		return apply_filters('logo-switcher.options', $default);
	}

	/**
	* Get the logo url
	* 
	* @return string
	*/
	public static function get_logo_url() {
		$setting = self::get_options();
		($result = get_theme_mod('logo_switcher')) && !empty($result) ? $result : $setting['default'];
		return esc_url($result);
	}

	/**
	* Print logo url
	* 
	* @param string $path the url target
	* @param string $description the logo image description
	*
	*/
	public static function print_link_tag($path = null, $description = null) {
		$setting = static::get_options();
		$path = !empty($path) ? $path : $setting['url'];
		$description = !empty($description) ? $description : $setting['description'];
		printf( '<a href="%1$s" title="%2$s" rel="home"><img src="%3$s" alt="%2$s" /></a>', esc_url($path), esc_attr($description), esc_url(static::get_logo_url()) );
	}

	/**
	* Print logo url
	* 
	* @param string $path the url target
	* @param string $description the logo image description
	*
	*/
	public static function print_image_tag($classes = []) {
		$class = '';

		if(!empty($classes)) {
			$classes = implode(' ', $classes);
			$class = ' class="' . $classes . '" ';
		}

		$setting = static::get_options();
		$description = !empty($description) ? $description : $setting['description'];

		$logo = esc_url(static::get_logo_url());
		$description = esc_attr($description);
		$tag = '<img src="' . $logo . '"' . $class . 'alt="' . $description . '">';
		echo $tag;
	}

}