using System;
using System.Collections.Generic;
using System.Net;
using Alexa.NET.Request;
using Alexa.NET.Request.Type;
using Alexa.NET.Response;
using Amazon.Lambda.Core;
using Newtonsoft.Json;

// Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class.
[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]

namespace LambdaJokes
{
    //public class Jokes
    //{
    //    public class Value
    //    {
    //        public int id { get; set; }
    //        public string joke { get; set; }
    //        public List<string> categories { get; set; }
    //    }

    //    public class RootObject
    //    {
    //        public string type { get; set; }
    //        public Value value { get; set; }
    //    }
    //}

    public class Function
    {
        public SkillResponse FunctionHandler(SkillRequest input, ILambdaContext context)
        {
            SkillResponse response = new SkillResponse();
            response.Response = new ResponseBody();
            response.Response.ShouldEndSession = false;
            IOutputSpeech innerResponse = null;
            var log = context.Logger;
            log.LogLine($"Skill Request Object:");
            log.LogLine(JsonConvert.SerializeObject(input));
            if (input.GetRequestType() == typeof(LaunchRequest))
            {
                log.LogLine($"Default LaunchRequest made");
                innerResponse = new PlainTextOutputSpeech();
                (innerResponse as PlainTextOutputSpeech).Text = $"Ciao, ecco la tua barzelletta: {EmitNewJokes()}";
                response.Response.ShouldEndSession = true;
            }
            else if (input.GetRequestType() == typeof(IntentRequest))
            {
                var intentRequest = (IntentRequest)input.Request;
                switch (intentRequest.Intent.Name)
                {
                    case "AMAZON.CancelIntent":
                        log.LogLine($"AMAZON.CancelIntent: send StopMessage");
                        innerResponse = new PlainTextOutputSpeech();
                        (innerResponse as PlainTextOutputSpeech).Text = "Fermato";
                        response.Response.ShouldEndSession = true;
                        break;
                    case "AMAZON.StopIntent":
                        log.LogLine($"AMAZON.StopIntent: send StopMessage");
                        innerResponse = new PlainTextOutputSpeech();
                        //(innerResponse as PlainTextOutputSpeech).Text = "Stopping";
                        (innerResponse as PlainTextOutputSpeech).Text = "Ciao";
                        response.Response.ShouldEndSession = true;
                        break;
                    case "AMAZON.HelpIntent":
                        log.LogLine($"AMAZON.HelpIntent: send HelpMessage");
                        innerResponse = new PlainTextOutputSpeech();
                        (innerResponse as PlainTextOutputSpeech).Text = "Ciao per usare questa skill basta dire dammi una barzelletta oppure dimmi una barzelletta";
                        break;

                    case "RichiestaBarzelletta":
                        log.LogLine($"Say Hello");
                        innerResponse = new PlainTextOutputSpeech();
                        (innerResponse as PlainTextOutputSpeech).Text = $"Ecco la tua barzelletta: {EmitNewJokes()}";
                        response.Response.ShouldEndSession = true;
                        break;


                    default:
                        log.LogLine($"Unknown intent: " + intentRequest.Intent.Name);
                         innerResponse = new PlainTextOutputSpeech();
                        (innerResponse as PlainTextOutputSpeech).Text = "Richiesta sconosciuta";
                        break;
                }
            }
            response.Response.ShouldEndSession = true;
            response.Response.OutputSpeech = innerResponse;
            response.Version = "1.0";
            log.LogLine($"Skill Response Object...");
            log.LogLine(JsonConvert.SerializeObject(response));
            return response;
        }

        private static string EmitNewJokes()
        {
            try
            {
                //String json = new WebClient().DownloadString("http://api.icndb.com/jokes/random");
                //Jokes.RootObject jobject = JsonConvert.DeserializeObject<Jokes.RootObject>(json);
                //return jobject.value.joke;

                //https://pastebin.com/raw/YWaCv2hT
                String[] linee = new WebClient().DownloadString("https://gist.githubusercontent.com/MicheleRago/b73f1c86d84674a21c6dbd35ea97e1df/raw/58e960f21884f028d18527f3930fb4abc9f822c6/gistfile1.txt").Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
                List<string> listabarzellette = new List<string>();
                string appo = "";
                foreach (string s in linee)
                    if (s == "FINE")
                    {
                        listabarzellette.Add(appo);
                        appo = "";
                    }
                    else appo += s;

                int r = new Random().Next(listabarzellette.Count);
                return listabarzellette[r];
            }
            catch (Exception ex)
            {
                return "Error";
            }
        }
    }
}