using System;
using System.Net;
using System.IO;
using System.Text;
using Newtonsoft.Json;

namespace Tesla {

public class Client
{
    public string baseURL = "https://owner-api.teslamotors.com/api/1";
    protected string token;
    public string vehicle_id { get; set; }
    private RootDataResponse dataResponse;
    private DateTime lastRefresh;

    public Vehicle[] ListVehicles()
    {
        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + "/vehicles");
        string responseString = processRequest(myHttpWebRequest);
        VehicleListResponse response = JsonConvert.DeserializeObject<VehicleListResponse>(responseString);
        return response.response.ToArray();
    }

    public DataResponse WakeVehicle()
    {

        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + $"/vehicles/{vehicle_id}/wake_up");
        myHttpWebRequest.Method = "POST";
        string responseString = processRequest(myHttpWebRequest);
        RootDataResponse response = JsonConvert.DeserializeObject<RootDataResponse>(responseString);
        return response.response;
    }

    public CommandResponse RunCommand(string command, string parms = "")
    {
        ASCIIEncoding encoding = new ASCIIEncoding ();
        byte[] byte1 = encoding.GetBytes (parms);
        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + $"/vehicles/{vehicle_id}/command/{command}");
        myHttpWebRequest.Method = "POST";
        myHttpWebRequest.ContentLength = byte1.Length;
        Stream newStream = myHttpWebRequest.GetRequestStream ();
        newStream.Write (byte1, 0, byte1.Length);
        
        string responseString = processRequest(myHttpWebRequest);
        APIResponseRoot response = JsonConvert.DeserializeObject<APIResponseRoot>(responseString);
        return response.response;
    }


    public ChargeState GetChargeState()
    {
        return GetVehicleData().response.charge_state;
    }

    public ClimateState GetClimateState()
    {
        return GetVehicleData().response.climate_state;
    }

    public DriveState GetDriveState()
    {
        return GetVehicleData().response.drive_state;
    }
    public GuiSettings GetGuiSettings()
    {
        return GetVehicleData().response.gui_settings;
    }
    public VehicleState GetVehicleState()
    {
        return GetVehicleData().response.vehicle_state;
    }
    public VehicleConfig GetVehicleConfig()
    {
        return GetVehicleData().response.vehicle_config;
    }
    public bool GetMobileEnabled()
    {
        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + $"/vehicles/{vehicle_id}/mobile_enabled");
        string responseString = processRequest(myHttpWebRequest);
        return responseString.Contains("true");
    }

    public RootChargingSites GetChargingSites()
    {
        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + $"/vehicles/{vehicle_id}/nearby_charging_sites");
        string responseString = processRequest(myHttpWebRequest);
        RootChargingSites response = JsonConvert.DeserializeObject<RootChargingSites>(responseString);
        return response;
    }

    public RootDataResponse GetVehicleData()
    {
        RootDataResponse response = this.dataResponse;
        if (lastRefresh <= DateTime.UtcNow.Subtract(TimeSpan.FromMinutes(5.0)))
        {
            return UpdateVehicleData();
        }

        return response;
    }
    public RootDataResponse UpdateVehicleData()
    {
        HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(baseURL + $"/vehicles/{vehicle_id}/vehicle_data");
        string responseString = processRequest(myHttpWebRequest);
        RootDataResponse response = JsonConvert.DeserializeObject<RootDataResponse>(responseString);
        this.dataResponse = response;
        this.lastRefresh = DateTime.UtcNow;
        return response;
    }
    protected string processRequest(HttpWebRequest myHttpWebRequest)
    {
        HttpWebResponse myHttpWebResponse = null;
        addHeaders(myHttpWebRequest);
        try
        {
            myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
            Stream stream = myHttpWebResponse.GetResponseStream();
            StreamReader reader = new StreamReader(stream, Encoding.UTF8);
            String responseString = reader.ReadToEnd();
            myHttpWebResponse.Close();
            return responseString;
        }
        catch (System.Net.WebException e)
        {
            Console.WriteLine(e);
            return null;
        }
    }
    public void addHeaders(HttpWebRequest httpWebRequest)
    {
        httpWebRequest.Headers["Authorization"] = token;
        httpWebRequest.Headers["User-Agent"] = "Tesla.NET";
        httpWebRequest.Headers["Content-Type"] = "application/json";
    }
    public void setToken(string t)
    {
        this.token = t;
    }
}
}