using System;
using System.Net;
using System.Json;
using System.IO;
using System.Threading.Tasks;
using System.Text;
using Newtonsoft.Json; // Treba stiahnut nuget package json.net

namespace Takemehome
{
    public class RouteClass {

        public int Distance{ get; set;}
        public int Duration{ get; set;}
        public string TextDuration{ get; set;}
        public string TextDistance{ get; set;}
        public double[,] Bounce{ get; set;}

        public async void prepareRequest(/*string[] waypoints,*/ string origin, string destination) {
            //string Finalwaypoints = "";
            StringBuilder sb = new StringBuilder ();
            //Finalwaypoints = string.Join ("|", waypoints);
            sb.Append("https://maps.googleapis.com/maps/api/directions/json?" +
                "mode=" +
                "driving" +
                "&origin=" +
                origin +
                "&destination=" +
                destination/* +
                "&waypoints=" +
                Finalwaypoints*/);
            string _url = sb.ToString();
            JsonValue json = await FetchDataAsync(_url);
            distance = json["routes"][0]["legs"][0]["distance"]["value"];
            duration = json["routes"][0]["legs"][0]["duration"]["value"];
            textDistance = json["routes"][0]["legs"][0]["distance"]["text"];
            textDuration = json["routes"][0]["legs"][0]["duration"]["text"];
            bounce = new double[2,2] {
                {json["routes"][0]["bounds"][0]["northeast"]["lat"], json["routes"][0]["bounds"][0]["northeast"]["lng"]},
                {json["routes"][0]["bounds"][0]["southwest"]["lat"], json["routes"][0]["bounds"][0]["southwest"]["lng"]}
            };
        }

        private async Task<JsonValue> FetchDataAsync(string url) {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create (new Uri (url));
            request.ContentType = "application/json";
            request.Method = "GET";

            // Send the request to the server and wait for the response:
            using (WebResponse response = await request.GetResponseAsync ())
            {
                // Get a stream representation of the HTTP web response:
                using (Stream stream = response.GetResponseStream ())
                {
                    // Use this stream to build a JSON document object:
                    JsonValue jsonValue = await Task.Run (() => JsonObject.Load (stream));

                    // Return the JSON document:
                    return jsonValue;
                }
            }
        }
    }
}