<?php

/*
Plugin Name: Bing Search API Plugin
Description: Override your wordpress search functionality with Bing Search API.
Version: 0.1.0
Text Domain: abbs-bing-search
Author: Askew Brook
Author URI: https://www.askewbrook.com
License: GPL V3
 */

class Askew_Brook_Bing_Search {
	private static $instance = null;
	private $plugin_path;
	private $plugin_url;
	private $text_domain = 'abbs-bing-search';

	public static function get_instance() {
		// If an instance hasn't been created and set to $instance create an instance and set it to $instance.
		if (null == self::$instance) {
			self::$instance = new self;
		}

		return self::$instance;
	}

	private function __construct() {
		$this->plugin_path = plugin_dir_path(__FILE__);
		$this->plugin_url  = plugin_dir_url(__FILE__);

		load_plugin_textdomain($this->text_domain, false, $this->plugin_path . '\lang');

		add_action('admin_enqueue_scripts', array($this, 'register_scripts'));
		add_action('admin_enqueue_scripts', array($this, 'register_styles'));

		add_action('wp_enqueue_scripts', array($this, 'register_scripts'));
		add_action('wp_enqueue_scripts', array($this, 'register_styles'));

		register_activation_hook(__FILE__, array($this, 'activation'));
		register_deactivation_hook(__FILE__, array($this, 'deactivation'));

		$this->run_plugin();
	}

	public function get_plugin_url() {
		return $this->plugin_url;
	}

	public function get_plugin_path() {
		return $this->plugin_path;
	}
	public function activation() {

	}
	public function deactivation() {

	}
	public function register_scripts() {

	}
	public function register_styles() {

	}
	private function run_plugin() {
		// action hooks
		add_action('admin_menu', 'abbs_bing_search_register_admin_page');
		add_action('pre_get_posts', 'abbs_bing_search_check_if_search');
		add_action('admin_init', 'abbs_bing_search_register_settings');
		add_action('admin_notices', 'abbs_bing_search_notify_user');

		function abbs_bing_search_register_admin_page() {
			add_submenu_page(
				"options-general.php",
				"Bing Search",
				"Bing Search",
				"manage_options",
				"abbs_bing_search_options",
				"abbs_bing_search_submenu_callback"
			);
		}

		function abbs_bing_search_register_settings() {

			register_setting("abbs_bing_search_options", "abbs_bing_api_key", array(
				'type'              => 'string',
				'description'       => __('The API Key provided by Bing to use the search functionality', 'abbs_ab-bing-search'),
				'sanitize_callback' => null,
				'show_in_rest'      => false,
			));

			register_setting("abbs_bing_search_options", "abbs_bing_search_count", array(
				'type'              => 'intval',
				'description'       => __('The amount of Search items per page', 'abbs_ab-bing-search'),
				'sanitize_callback' => null,
				'show_in_rest'      => false,
			));

			register_setting("abbs_bing_search_options", "abbs_bing_search_market", array(
				'type'              => 'string',
				'description'       => __('The market that the search will use', 'abbs_ab-bing-search'),
				'sanitize_callback' => null,
				'show_in_rest'      => false,
			));

			register_setting("abbs_bing_search_options", "abbs_bing_search_custom_css", array(
				'type'              => 'string',
				'description'       => __('Inject any custom styling here to be used on the plugin theme file', 'abbs_ab-bing-search'),
				'sanitize_callback' => null,
				'show_in_rest'      => false,
			));

			add_settings_section(
				'abbs_bing_search_settings_section',
				__('API Settings', 'abbs_ab-bing-search'),
				'',
				'abbs_bing_search_options'
			);

			add_settings_section("abbs_bing_inject_css_section",
				__("Custom CSS", 'abbs_ab-bing-search'),
				'',
				"abbs_bing_search_options"
			);

			add_settings_field("abbs_bing_api_key", __("Bing API Key", 'abbs-bing-search'), "abbs_bing_api_key_callback", "abbs_bing_search_options", 'abbs_bing_search_settings_section');
			add_settings_field("abbs_bing_search_count", __("Items Per Page", 'abbs-bing-search'), "abbs_bing_search_count_callback", "abbs_bing_search_options", 'abbs_bing_search_settings_section');
			add_settings_field("abbs_bing_search_market", __("Country/Market", 'abbs-bing-search'), "abbs_bing_search_market_callback", "abbs_bing_search_options", 'abbs_bing_search_settings_section');
			add_settings_field("abbs_bing_search_custom_css", __("Custom Styles", 'abbs-bing-search'), "abbs_bing_search_custom_css_callback", "abbs_bing_search_options", 'abbs_bing_inject_css_section');
		}

		function abbs_bing_search_custom_css_callback() {
			// get the value of the setting we've registered with register_setting()
			$setting = get_option('abbs_bing_search_custom_css');
			?>
			<textarea name="abbs_bing_search_custom_css" class="large-text" cols="30" placeholder="#main {
	background-color: blue;
}" rows="10"><?=isset($setting) ? esc_attr($setting) : '';?></textarea>
			<?php
}

		function abbs_bing_api_key_callback() {
			// get the value of the setting we've registered with register_setting()
			$setting = get_option('abbs_bing_api_key');
			// output the field
			?>
			<input type="text" name="abbs_bing_api_key" class="regular-text" value="<?=isset($setting) ? esc_attr($setting) : '';?>">
			<?php
}

		function abbs_bing_search_count_callback() {
			// get the value of the setting we've registered with register_setting()
			$setting = get_option('abbs_bing_search_count');
			// output the field
			?>
			<input type="number" name="abbs_bing_search_count" class="small-text" min="1" max="20"  required="" value="<?=isset($setting) && $setting != '' ? esc_attr($setting) : '10';?>"> <?php __("Items", "ab-bing-search");?>
			<?php
}

		function abbs_bing_search_market_callback() {
			include "shortcodes.php";
			$setting = get_option('abbs_bing_search_market');
			?>
			<select name="abbs_bing_search_market">
				<?php foreach ($markets as $option): ?>
					<option <?php echo ($setting == $option['shortcode'] ? "selected=''" : ""); ?> value="<?=$option['shortcode'];?>"><?=$option['longform'];?></option>
				<?php endforeach;?>
			</select>
			<?php
}

		function abbs_bing_search_submenu_callback() {
			// check user capabilities
			if (!current_user_can('manage_options')) {
				return;
			}
			add_filter('admin_footer_text', 'abbs_admin_footer_content');
			?>
			<div class="wrap"><div id="icon-tools" class="icon32"></div>
				<h1><?=esc_html(get_admin_page_title());?></h1>
				<form action="options.php" method="post">
		    	<?php
// output security fields for the registered setting "wporg_options"
			settings_fields('abbs_bing_search_options');
			// output setting sections and their fields
			// (sections are registered for "wporg", each field is registered to a specific section)
			do_settings_sections('abbs_bing_search_options');
			// output save settings button
			submit_button('Save Settings');
			?>
      	</form>
			</div>
			<?php
}

		function abbs_bing_search_notify_user() {
			// check if user has set their api key for bing search
			$key = get_option("abbs_bing_api_key", false);
			if (!isset($key) || $key == '') {?>
			<div class="notice notice-error is-dismissible">
				<p><?=__("You have not yet set your bing search API Key. You can obtain one", 'abbs-bing-search');?> <a target="_blank" href="https://www.microsoft.com/cognitive-services/en-us/bing-web-search-api"><?=__("here.", "abbs-bing-search");?></a></p>
			</div>
			<?php }
		}

		function abbs_bing_search_fire_search_func() {
			$bing_key      = get_option("abbs_bing_api_key");
			$search_count  = get_option("abbs_bing_search_count");
			$search_market = urlencode(get_option('abbs_bing_search_count'));
			$page          = (isset($_GET['s_page']) ? $_GET['s_page'] : 0);
			$query_string  = urlencode($_GET['s']);

			$url = $_SERVER['SERVER_NAME'];

			$page_offset = $page * $search_count;
			try {
				$curl = curl_init();

				curl_setopt_array($curl, array(
					CURLOPT_URL            => "https://api.cognitive.microsoft.com/bing/v5.0/search?q=$query_string%20site%3A$url&count=$search_count&offset=$page_offset&mkt=$search_market&safesearch=moderate&responseFilter=WebPages&textDecorations=true&textFormat=HTML",
					CURLOPT_RETURNTRANSFER => true,
					CURLOPT_ENCODING       => "",
					CURLOPT_MAXREDIRS      => 10,
					CURLOPT_TIMEOUT        => 30,
					CURLOPT_HTTP_VERSION   => CURL_HTTP_VERSION_1_1,
					CURLOPT_CUSTOMREQUEST  => "GET",
					CURLOPT_HTTPHEADER     => array(
						"cache-control: no-cache",
						"ocp-apim-subscription-key: ff2e93288547481897dd14e22074f654",
					),
				));

				$response = curl_exec($curl);
				$err      = curl_error($curl);

				curl_close($curl);

				if ($err) {
					global $bing_query_object;
					$bing_query_object = "ERROR";
				} else {
					global $bing_query_object;
					global $bing_query_options;
					$bing_query_object  = json_decode($response);
					if (!isset($bing_query_object->webPages->value)) {
						$bing_query_object = "NORESULTS";
					} else {
						$bing_query_object  = $bing_query_object->webPages->value;
						$bing_query_options = array(
							"next_page" => "<a href=\"" . get_site_url() . "?s=" . $query_string . "&s_page=" . ($page + 1) . "\">Next Page</a>",
							"prev_page" => ($page != 0 ? "<a href=\"" . get_site_url() . "?s=" . $query_string . "&s_page=" . ($page - 1) . "\">Previous Page</a>" : ""),
						);
					}
				}
			} catch (Exception $e) {
				global $bing_query_object;
				$bing_query_object = "ERROR";
			}

			return __DIR__ . "/bing-search-template.php";
		}

		function abbs_admin_footer_content() {
			echo '<span id="footer-thankyou">Thank you for creating with <a href="https://wordpress.org/">WordPress</a>.</span> | <span>Plugin Created By <a target="_blank" href="https://askewbrook.com">Askew Brook</a></span>';
		}

		function abbs_bing_search_check_if_search($query) {
			if ($query->is_search) {
				add_action('template_include', 'abbs_bing_search_fire_search_func');
			}
		}
	}
}

Askew_Brook_Bing_Search::get_instance();