<?php

namespace TwoFAS\TwoFAS\Http;

use TwoFAS\TwoFAS\Hooks\Authenticate_Filter;

class Request {

	const TWOFAS_ARRAY_KEY = 'twofas';

	/**
	 * @var array
	 */
	private $get;

	/**
	 * @var array
	 */
	private $post;

	/**
	 * @var Cookie
	 */
	private $cookie;

	/**
	 * @var array
	 */
	private $server;

	/**
	 * @param array  $get
	 * @param array  $post
	 * @param Cookie $cookie
	 * @param array  $server
	 */
	public function __construct( array $get, array $post, Cookie $cookie, array $server ) {
		$this->get    = $get;
		$this->post   = $post;
		$this->cookie = $cookie;
		$this->server = $server;
	}

	/**
	 * @param string $key
	 *
	 * @return bool
	 */
	public function has_twofas_param( $key ) {
		return $this->are_twofas_params_sent()
			&& array_key_exists( $key, $this->post[ self::TWOFAS_ARRAY_KEY ] );
	}

	/**
	 * @param array $params
	 *
	 * @return bool
	 */
	public function has_twofas_params( array $params ) {
		if ( ! $this->are_twofas_params_sent() ) {
			return false;
		}

		$keys = array_keys( $this->post[ self::TWOFAS_ARRAY_KEY ] );
		$diff = array_diff( $params, $keys );

		return empty( $diff );
	}

	/**
	 * @param string $key
	 *
	 * @return null|string
	 */
	public function get_twofas_param( $key ) {
		if ( ! $this->has_twofas_param( $key ) ) {
			return null;
		}

		return $this->post[ self::TWOFAS_ARRAY_KEY ][ $key ];
	}

	/**
	 * @return string
	 */
	public function http_method() {
		return strtoupper( $this->header( 'REQUEST_METHOD' ) );
	}

	/**
	 * @return bool
	 */
	public function is_post() {
		return 'POST' === $this->http_method();
	}

	/**
	 * @return bool
	 */
	public function is_ajax() {
		return 'xmlhttprequest' === strtolower( $this->header( 'HTTP_X_REQUESTED_WITH' ) );
	}

	/**
	 * @return array|null|string
	 */
	public function get_nonce() {
		if ( $this->is_post() ) {
			return $this->post( '_wpnonce' );
		}

		return $this->get( '_wpnonce' );
	}

	/**
	 * @param string $parameter
	 *
	 * @return null|string|array
	 */
	public function get( $parameter ) {
		return $this->get_from_array( $this->get, $parameter );
	}

	/**
	 * @param string $parameter
	 *
	 * @return null|string|array
	 */
	public function post( $parameter ) {
		return $this->get_from_array( $this->post, $parameter );
	}

	/**
	 * @return Cookie
	 */
	public function cookie() {
		return $this->cookie;
	}

	/**
	 * @param string $parameter
	 *
	 * @return null|string|array
	 */
	public function request( $parameter ) {
		$request = array_merge( $this->get, $this->post, $this->cookie->get_cookies() );

		return $this->get_from_array( $request, $parameter );
	}

	/**
	 * @param string $parameter
	 *
	 * @return array|null|string
	 */
	public function header( $parameter ) {
		return $this->get_from_array( $this->server, $parameter );
	}

	/**
	 * @param string $name
	 *
	 * @return bool
	 */
	public function has( $name ) {
		if ( array_key_exists( $name, $this->get ) ) {
			return true;
		} elseif ( array_key_exists( $name, $this->post ) ) {
			return true;
		}

		return false;
	}

	/**
	 * @param mixed $action
	 *
	 * @return bool
	 */
	public function is_login_action_equal_to( $action ) {
		return $this->post( Authenticate_Filter::LOGIN_ACTION_KEY ) === $action;
	}

	/**
	 * @return string
	 */
	public function page() {
		$page = $this->get( Route::PAGE_KEY );

		if ( is_string( $page ) ) {
			return $page;
		}

		return '';
	}

	/**
	 * @return string
	 */
	public function action() {
		$action = $this->get( Route::TWOFAS_ACTION_KEY );
		if ( is_string( $action ) ) {
			return $action;
		}

		return '';
	}

	/**
	 * @return string
	 */
	public function referer_action() {
		parse_str( $this->header( 'HTTP_REFERER' ), $query );

		if ( array_key_exists( Route::TWOFAS_ACTION_KEY, $query ) ) {
			return $query[Route::TWOFAS_ACTION_KEY];
		}

		return '';
	}

	/**
	 * @param string $page
	 *
	 * @return bool
	 */
	public function is_page_equal_to( $page ) {
		return $this->get( 'page' ) === $page;
	}

	/**
	 * @param string $action
	 *
	 * @return bool
	 */
	public function is_action_equal_to( $action ) {
		return $this->get( 'twofas-action' ) === $action;
	}

	/**
	 * @param array  $source
	 * @param string $item
	 *
	 * @return null|string|array
	 */
	private function get_from_array( array $source, $item ) {
		if ( array_key_exists( $item, $source ) ) {
			return $source[ $item ];
		}

		return null;
	}

	/**
	 * @return bool
	 */
	private function are_twofas_params_sent() {
		return array_key_exists( self::TWOFAS_ARRAY_KEY, $this->post )
			&& is_array( $this->post[ self::TWOFAS_ARRAY_KEY ] );
	}
}