var request = require("superagent");
var Endpoints = require("./lib/endpoints.js");
var Server = require("./lib/server.js").Server;
var Message = require("./lib/message.js").Message;
var User = require("./lib/user.js").User;
var Channel = require("./lib/channel.js").Channel;
var List = require("./lib/list.js").List;
var WebSocket = require('ws');

exports.Client = function(options) {

    this.options = options || {};
    this.token = "";
    this.loggedIn = false;
    this.websocket = null;
    this.events = {};
    this.user = null;

    this.serverList = new List("id");

}

exports.Client.prototype.triggerEvent = function(event, args) {

    if (this.events[event]) {
        this.events[event].apply(this, args);
    } else {
        return false;
    }

}

exports.Client.prototype.on = function(name, fn) {
    this.events[name] = fn;
}

exports.Client.prototype.off = function(name) {
    this.events[name] = function() {};
}

exports.Client.prototype.cacheServer = function(id, cb, members) {

    if ( this.serverList.filter("id", id).length > 0 ) {
        return;
    }

    var self = this;

    request
        .get(Endpoints.SERVERS + "/" + id)
        .set("authorization", this.token)
        .end(function(err, res) {
            var dat = res.body;
            var server = new Server(dat.region, dat.owner_id, dat.name, dat.roles[0].id, members || dat.members);

            request
            .get(Endpoints.SERVERS + "/" + id + "/channels")
            .set("authorization", self.token)
            .end(function(err, res){

                var channelList = res.body;
                for(channel of channelList){
                    server.channels.add( new Channel(channel, server) );
                }

                self.serverList.add(server);

                cb(server);
            });
        });

}

exports.Client.prototype.login = function(email, password, cb) {

    var client = this;

    var details = {
        email: email,
        password: password
    };

    request
        .post(Endpoints.LOGIN)
        .send(details)
        .end(function(err, res) {
            if (!res.ok) {
                cb(err);
            } else {
                client.token = res.body.token;
                client.loggedIn = true;
                cb();
                client.connectWebsocket();
            }
        });

}

exports.Client.prototype.connectWebsocket = function(cb) {

    var client = this;

    this.websocket = new WebSocket(Endpoints.WEBSOCKET_HUB);
    this.websocket.onclose = function() {
        client.triggerEvent("disconnected");
    };
    this.websocket.onmessage = function(e) {

        var dat = JSON.parse(e.data);

        switch (dat.op) {

            case 0:
                if (dat.t === "READY") {

                    var data = dat.d;

                    self = this;
                    setInterval(function() {
                        self.keepAlive.apply(self);
                    }, data.heartbeat_interval);

                    var _servers = data.guilds,
                        servers = [];

                    var cached = 0, toCache = _servers.length;

                    for (x in _servers) {
                        _server = _servers[x];
                        client.cacheServer(_server.roles[0].id, function(server) {
                            cached++;
                            if(cached >= toCache){
                                client.triggerEvent("ready");
                            }
                        }, _server.members);
                    }

                    client.user = new User(data.user.username, data.user.id, data.user.discriminator, data.user.avatar);
                } else if (dat.t === "MESSAGE_CREATE") {

                    var data = dat.d;

                    var channel = client.channelFromId(data.channel_id);

                    var message = new Message(data, channel);
                    client.triggerEvent("message", [message]);

                }
                break;

        }

    };
    this.websocket.sendPacket = function(p) {
        this.send(JSON.stringify(p));
    }
    this.websocket.keepAlive = function() {

        this.sendPacket({
            op: 1,
            d: Date.now()
        });

    }
    this.websocket.onopen = function() {

        var connDat = {
            op: 2,
            d: {
                token: client.token,
                v: 2
            }
        };

        connDat.d.properties = {
            "$os": "Windows",
            "$browser": "Chrome",
            "$device": "discord.js",
            "$referrer": "",
            "$referring_domain": ""
        };

        this.sendPacket(connDat);
    }
}

exports.Client.prototype.logout = function() {

    var client = this;

    request
        .post(Endpoints.LOGOUT)
        .end(function() {
            client.loggedIn = false;
        });

}

exports.Client.prototype.createServer = function(details, cb) {

    var client = this;

    request
        .post(Endpoints.SERVERS)
        .set("authorization", client.token)
        .send(details)
        .end(function(err, res) {
            if (!res.ok) {
                cb(err);
            } else {
                cb(new Server(res.body));
            }
        });

}

exports.Client.prototype.sendMessage = function(channel, message, cb, _mentions) {

    var cb = cb || function(){};

    for (mention in _mentions) {
        _mentions[mention] = _mentions[mention].id;
    }

    var client = this;
    var details = {
        content: message.substring(0,2000),
        mentions: _mentions || []
    };

    request
        .post(Endpoints.CHANNELS + "/" + channel.id + "/messages")
        .set("authorization", client.token)
        .send(details)
        .end(function(err, res) {
            cb(new Message(res.body, client.channelFromId(res.body.channel_id)));
        });
}

exports.Client.prototype.deleteMessage = function(message) {

    var client = this;

    request
        .del(Endpoints.CHANNELS + "/" + message.channel.id + "/messages/" + message.id)
        .set("authorization", client.token)
        .end(function(err, res) {

        });
}


exports.Client.prototype.logFile = function(name, url){

    var fs = require("fs");

    request
        .get(url)
        .set("authorization", this.token)
        .end(function(err, res){
            fs.writeFile("./log/"+name+".json", JSON.stringify(res.body, null, "\t"), function(err) {
                if (err) {
                    return console.log(err);
                }
            });
        });
}

exports.Client.prototype.channelFromId = function(id){
    var channelList = this.serverList.concatSublists("channels", "id");
    var channel = channelList.filter("id", id, true);

    return channel;
}

exports.Client.prototype.getChannelLogs = function(channel, amount, cb){

    amount = amount+1 || 0;
    var client = this;

    request
    .get(Endpoints.CHANNELS + "/" + channel.id + "/messages?limit="+amount)
    .set("authorization", client.token)
    .end(function(err, res){

        var datList = new List("id");

        for(item of res.body){
            datList.add( new Message(item, channel) );
        }

        datList.removeIndex(0);

        cb(datList);

    });

}