const Express = require("express");
const BodyParser = require("body-parser");
const mongodb = require("mongodb");
const ObjectId = require("mongodb").ObjectID;
const CONNECTION_URL = "mongodb+srv://edge-mongodb";
const DATABASE_NAME = "edgecomm";
const COLLECTION_NAME = "nettranslate";
var cors = require('cors');
const MongoClient = require("mongodb").MongoClient;
const requestIp = require('request-ip');
var app = Express();
app.use(cors());
app.use(BodyParser.json());
app.use(BodyParser.urlencoded({ extended: true }));
app.use(requestIp.mw());
app.enable('trust proxy');
var corsOptions = {
    origin: 'http://matchmaking.obsidiancorestudios.com',
    optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
  }
var database, collection;
var requestEnable = false;
/**GET*/
app.get("/", (request, response) => {
    response.json({
        Error: "Please refer to documentation.",
        Status: "Failed",
        Info: "Matchmaking Server"
    })

});
/**GET:USRPASS:SESSION*/
app.get("/lobby/listall/", async (request, response) => {
    /**
     Field LobbyCount notifies the client of the number of indexed lobbies in the response 
     Field LBN[num] breaks down into Lobby Name [Number], this informs the client what the name is of the assosiated lobby
     Field LBIP[num] breaks down into Lobby IP [Number], this informs the client what the IP is of the assosiated lobby
     */
    if (requestEnable) {
        var o_id = new mongodb.ObjectID();
        var ar;
        auth.insertOne({
           _id : o_id,
            type: 1,
            status: false
        })
        await  auth.findOne({_id: o_id}, (err, res) => {
            const delay = ms => new Promise(resolve => setTimeout(resolve, ms))
            const dec = async i => (await delay(200), --i)
            ar = res;
            const verifyUser = async () => {
            let responseEnabled = true;
            let enableLookup = true;
             let i = 8;
             let timeout = 7;
            while(i = await dec(i))
           try {
            if (enableLookup) {
                timeout = timeout - 1;
                if (timeout > 0) { 
                    await  auth.findOne({_id: o_id}, (err, res) => {   
                        if (res.status) {
                            if (responseEnabled) {
                             timeout = 0;
                                 i = 1;
                                 if (res.type == 2) {
                                    responseEnabled = false;
                                    enableLookup = false;
                                    response.status(200).json({
                                       Info: "Good",
                                      LBN : res.lobbies,
                                   LBIP :  res.ip,
                                      LobbyCount : res.LobbyCount
                                    });
                                    res = null;
                                  } else {
                                    responseEnabled = false;
                                    ar = null;
                                    res = null;
                                    response.status(403).json({
                                        Info: "Forbidden",
                                        Message: "Something went wrong."
                                        });
                                  }
                            }
                         }
              });
                } else {
                    if (responseEnabled) {
                        response.status(403).json({
                            Info: "Forbidden",
                            Message: "Something went wrong..."
                            });
                         responseEnabled = false;
                         ar = null;
                         res = null;
                    }
                }
              }   
           } catch (err) {
            enableLookup = false;
            res = null;
            if (responseEnabled) {
               response.status(503).json({
                   Info: "Forbidden",
                   Message: "Something went wrong..."
                   });
            }
            responseEnabled = false;
            console.log(err);
            timeout = 1;
        }
    }
        verifyUser();
        });
    } else {
        response.status(503).json({
            Info: "Forbidden",
            Message: "The server is starting up, please retry again in a moment."
            });
    }
  

});
app.get("/lobby/submit/", async (request, response) => {
    /**
    Lobby submission documentation
     */
     if (typeof request.query.name === 'undefined' || typeof request.query.ip === 'undefined' || typeof request.query.version === 'undefined' ||  request.query.name === '' ||  request.query.ip === '' ||  request.query.version === '') {
        response.status(403).json({
            Info : "Forbidden",
            Message : "Missing requirements",
            POSTSTATE : false
        });
     } else {
        if (requestEnable) {
            var o_id = new mongodb.ObjectID();
            var ar;
            auth.insertOne({
                _id : o_id,
                type : 3,
                LobbyName : request.query.name,
                LobbyIP : request.query.ip,
                LobbyVersion : request.query.version,
                status : false
            })
            await  auth.findOne({_id: o_id}, (err, res) => {
                const delay = ms => new Promise(resolve => setTimeout(resolve, ms))
                const dec = async i => (await delay(200), --i)
                ar = res;
                const verifyUser = async () => {
                let responseEnabled = true;
                let enableLookup = true;
                 let i = 8;
                 let timeout = 7;
                while(i = await dec(i))
               try {
                if (enableLookup) {
                    timeout = timeout - 1;
                    if (timeout > 0) { 
                        await  auth.findOne({_id: o_id}, (err, res) => {   
                            if (res.status) {
                                if (responseEnabled) {
                                 timeout = 0;
                                     i = 1;
                                     if (res.type == 4 && res.lobbyPosted == true) {
                                        responseEnabled = false;
                                        enableLookup = false;
                                        response.status(200).json({
                                        Info: "Good",
                                        LBN : res.lobbyName,
                                        SECRET :  res.lobbySecret,
                                        POSTSTATE : res.lobbyPosted
                                        });
                                        res = null;
                                      } else {
                                        responseEnabled = false;
                                        if (res.type == 4 && res.lobbyPosted == false)
                                        response.status(403).json({
                                            Info: "Forbidden",
                                            Message: res.info,
                                            POSTSTATE : res.lobbyPosted
                                            });
                                      }
                                      res = null;
                                      ar = null;
                                }
                             }
                  });
                    } else {
                        if (responseEnabled) {
                            response.status(403).json({
                                Info: "Forbidden",
                                Message: "Something went wrong.",
                                POSTSTATE : false
                                });
                             responseEnabled = false;
                             ar = null;
                             res = null;
                        }
                    }
                  }   
               } catch (err) {
                enableLookup = false;
                res = null;
                if (responseEnabled) {
                   response.status(503).json({
                       Info: "Forbidden",
                       Message: "Something went wrong...",
                       POSTSTATE : false
                       });
                }
                responseEnabled = false;
                console.log(err);
                timeout = 1;
            }
        }
            verifyUser();
            });
        } else {
            response.status(503).json({
                Info: "Forbidden",
                Message: "The server is starting up, please retry again in a moment.",
                POSTSTATE : false
                });
        }
     }
});
app.get("/lobby/remove/", async (request, response) => {
    /**
    Lobby removal documentation
     */
    response.status(503).json({
        INFORMATION: "THE LOBBY REMOVAL ENDPOINT IS NOT ACTIVE, TRY AGAIN LATER.",
        VERSION: 1.0
    });
});
    app.listen(10000, () => {
    console.log("Application is now online, attempting to connect to Database. Requests will be set to 503 until connected!")
    MongoClient.connect(CONNECTION_URL, { useNewUrlParser: true, useUnifiedTopology: true} , (error, client) => {
        if(error) {
            throw error;
        }
        database = client.db(DATABASE_NAME);
        auth = database.collection(COLLECTION_NAME);
        requestEnable = true;
        console.log("Database is connected and requests are enabled...");
    });
});