using System;
using ln.http.resources.websocket;
using ln.http.resources;
using ln.logging;
using System.Collections.Generic;
using ln.http.websocket;
using System.Linq;
using ln.types.rpc;
using ln.json;
using ln.json.mapping;

namespace ln.skyscanner.http
{
    public class WebSocketInterface : WebsocketResource
    {
        SkyScanner.Service SkyScannerService { get; }

        public WebSocket[] CurrentWebSockets {
            get
            {
                lock (currentWebSockets)
                {
                    return currentWebSockets.ToArray();
                }
            }
        }
        HashSet<WebSocket> currentWebSockets = new HashSet<WebSocket>();

        public WebSocketInterface(Resource container,SkyScanner.Service skyscannerService)
            :base(container,"socket")
        {
            SkyScannerService = skyscannerService;
            Connection += WebSocketInterface_Connection;
        }

        void WebSocketInterface_Connection(WebsocketResource webSocketResource, ln.http.websocket.WebSocket webSocket, WSREvent ev)
        {
            lock (currentWebSockets)
            {
                switch (ev)
                {
                    case WSREvent.CONNECT:
                        currentWebSockets.Add(webSocket);
                        break;
                    case WSREvent.CLOSE:
                        currentWebSockets.Remove(webSocket);
                        break;
                }
            }
        }

        public void Broadcast(JSONObject json)
        {
            Broadcast(json.ToString());
        }

        public void Broadcast(String text)
        {
            foreach (WebSocket webSocket in CurrentWebSockets)
            {
                webSocket.Send(text);
            }
        }

        public override void MessageReceived(WebSocketResourceRequestContext requestContext, string textMessage)
        {
            try
            {
                JSONObject json = (JSONObject)JSONParser.Parse(textMessage);
                RPCCall rpcCall = json.ToObject<RPCCall>();

                RPCResult rpcResult = SkyScannerService.RPCContainer.Invoke(rpcCall);

                requestContext.WebSocket.Send(
                    JSONObject.From(rpcResult).ToString()
                );

            }
            catch (Exception e)
            {
                Logging.Log(e);
            }
        }

    }
}