<?php
/**
 * Opalestate_Yelp
 *
 * @package    opalestate
 * @author     Opal  Team <info@wpopal.com >
 */
 
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class Opalestate_Yelp {
	// API constants, you shouldn't have to change these.
	const API_HOST = "https://api.yelp.com";
	const SEARCH_PATH = "/v3/businesses/search";
	const BUSINESS_PATH = "/v3/businesses/";  // Business ID will come after slash.
	const TOKEN_PATH = "/oauth2/token";
	const GRANT_TYPE = "client_credentials";

	public static function get_client_id() {
		return opalestate_get_option( 'yelp_app_id', '' );
	}

	public static function get_app_secret() {
		return opalestate_get_option( 'yelp_app_secret', '' );
	}

	public static function get_app_key() {
		return opalestate_get_option( 'yelp_app_key', '' );
	}

	public static function get_categories() {
		return opalestate_get_option( 'yelp_categories', [] );
	}

	public static function get_category_results_limit() {
		return opalestate_get_option( 'yelp_number_results', 3 );
	}

	/**
	 * Given a bearer token, send a GET request to the API.
	 *
	 * @return   OAuth bearer token, obtained using client_id and client_secret.
	 */
	public function obtain_bearer_token() {
		$yelp_client_id     = static::get_client_id();
		$yelp_client_secret = static::get_app_secret();
		$yelp_app_key       = static::get_app_key();

		return $yelp_app_key;
	}


	/**
	 * Makes a request to the Yelp API and returns the response
	 *
	 * @param    $bearer_token   API bearer token from obtain_bearer_token
	 * @param    $host           The domain host of the API
	 * @param    $path           The path of the API after the domain.
	 * @param    $url_params     Array of query-string parameters.
	 * @return   The JSON response from the request
	 */
	public function request( $bearer_token, $host, $path, $url_params = [] ) {
		// Send Yelp API Call
		try {
			$url = $host . $path . "?" . http_build_query( $url_params );
			$args = [
				'timeout'     => 30,
				'redirection' => 10,
				'httpversion' => CURL_HTTP_VERSION_1_1,
				'user-agent'  => '',
				'headers'     => [
					'authorization' => 'Bearer ' . $bearer_token,
				],
				'sslverify'   => false,
			];

			$response = wp_remote_get( $url, $args );
			$response = wp_remote_retrieve_body( $response );
		} catch ( Exception $e ) {

		}

		return $response;
	}

	/**
	 * Query the Search API by a search term and location
	 *
	 * @param    $bearer_token   API bearer token from obtain_bearer_token
	 * @param    $term           The search term passed to the API
	 * @param    $location       The search location passed to the API
	 * @return   The JSON response from the request
	 */
	public function search( $bearer_token, $term, $latitude, $longitude ) {
		$url_params = [];

		$url_params['term']      = $term;
		$url_params['latitude']  = $latitude;
		$url_params['longitude'] = $longitude;
		$url_params['limit']     = static::get_category_results_limit();

		return $this->request( $bearer_token, static::API_HOST, static::SEARCH_PATH, $url_params );
	}

	/**
	 * Query the Business API by business_id
	 *
	 * @param    $bearer_token   API bearer token from obtain_bearer_token
	 * @param    $business_id    The ID of the business to query
	 * @return   The JSON response from the request
	 */
	public function get_business( $bearer_token, $business_id ) {
		$business_path = $GLOBALS['BUSINESS_PATH'] . urlencode( $business_id );

		return $this->request( $bearer_token, $GLOBALS['API_HOST'], $business_path );
	}

	public function query_api( $term, $latitude, $longitude ) {
		$bearer_token = $this->obtain_bearer_token();

		$response = json_decode( $this->search( $bearer_token, $term, $latitude, $longitude ) );

		return $response;
	}

	public function get_results( $term, $latitude, $longitude ) {
		if ( ! static::get_categories() ) {
			return false;
		}

		$results = $this->query_api( $term, $latitude, $longitude );
		if ( isset( $results->error ) && $results->error ) {
			return false;
		}

		return $results;
	}

	public static function get_all_categories() {
		return apply_filters( 'opalestate_yelp_all_categories',
			[
				'active'             => [
					'category'      => esc_html__( 'Active Life', 'opalestate-pro' ),
					'category_sign' => 'fa fa-bicycle',
				],
				'arts'               => [
					'category'      => esc_html__( 'Arts & Entertainment', 'opalestate-pro' ),
					'category_sign' => 'fa fa-music',
				],
				'auto'               => [
					'category'      => esc_html__( 'Automotive', 'opalestate-pro' ),
					'category_sign' => 'fa fa-car',
				],
				'beautysvc'          => [
					'category'      => esc_html__( 'Beauty & Spas', 'opalestate-pro' ),
					'category_sign' => 'fa fa-female',
				],
				'education'          => [
					'category'      => esc_html__( 'Education', 'opalestate-pro' ),
					'category_sign' => 'fa fa-graduation-cap',
				],
				'eventservices'      => [
					'category'      => esc_html__( 'Event Planning & Services', 'opalestate-pro' ),
					'category_sign' => 'fa fa-birthday-cake',
				],
				'financialservices'  => [
					'category'      => esc_html__( 'Financial Services', 'opalestate-pro' ),
					'category_sign' => 'fa fa-money',
				],
				'food'               => [
					'category'      => esc_html__( 'Food', 'opalestate-pro' ),
					'category_sign' => 'fa fa fa-cutlery',
				],
				'health'             => [
					'category'      => esc_html__( 'Health & Medical', 'opalestate-pro' ),
					'category_sign' => 'fa fa-medkit',
				],
				'homeservices'       => [
					'category'      => esc_html__( 'Home Services ', 'opalestate-pro' ),
					'category_sign' => 'fa fa-wrench',
				],
				'hotelstravel'       => [
					'category'      => esc_html__( 'Hotels & Travel', 'opalestate-pro' ),
					'category_sign' => 'fa fa-bed',
				],
				'localflavor'        => [
					'category'      => esc_html__( 'Local Flavor', 'opalestate-pro' ),
					'category_sign' => 'fa fa-coffee',
				],
				'localservices'      => [
					'category'      => esc_html__( 'Local Services', 'opalestate-pro' ),
					'category_sign' => 'fa fa-dot-circle-o',
				],
				'massmedia'          => [
					'category'      => esc_html__( 'Mass Media', 'opalestate-pro' ),
					'category_sign' => 'fa fa-television',
				],
				'nightlife'          => [
					'category'      => esc_html__( 'Nightlife', 'opalestate-pro' ),
					'category_sign' => 'fa fa-glass',
				],
				'pets'               => [
					'category'      => esc_html__( 'Pets', 'opalestate-pro' ),
					'category_sign' => 'fa fa-paw',
				],
				'professional'       => [
					'category'      => esc_html__( 'Professional Services', 'opalestate-pro' ),
					'category_sign' => 'fa fa-suitcase',
				],
				'publicservicesgovt' => [
					'category'      => esc_html__( 'Public Services & Government', 'opalestate-pro' ),
					'category_sign' => 'fa fa-university',
				],
				'realestate'         => [
					'category'      => esc_html__( 'Real Estate', 'opalestate-pro' ),
					'category_sign' => 'fa fa-building-o',
				],
				'religiousorgs'      => [
					'category'      => esc_html__( 'Religious Organizations', 'opalestate-pro' ),
					'category_sign' => 'fa fa-cloud',
				],
				'restaurants'        => [
					'category'      => esc_html__( 'Restaurants', 'opalestate-pro' ),
					'category_sign' => 'fa fa-cutlery',
				],
				'shopping'           => [
					'category'      => esc_html__( 'Shopping', 'opalestate-pro' ),
					'category_sign' => 'fa fa-shopping-bag',
				],
				'transport'          => [
					'category'      => esc_html__( 'Transportation', 'opalestate-pro' ),
					'category_sign' => 'fa fa-bus',
				],
			]
		);
	}

	public static function get_all_categories_options() {
		$categories = static::get_all_categories();

		$options = [];
		foreach ( $categories as $key => $term ) {
			$options[ $key ] = $term['category'];
		}

		return $options;
	}
}