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var geoip = require('geoip-lite');
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var _ = require('lodash');
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var MAX_HISTORY = 40;
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var Node = function Node(data)
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{
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this.id = null;
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this.info = {};
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this.geo = {}
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this.stats = {
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active: false,
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listening: false,
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mining: false,
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peers: 0,
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pending: 0,
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gasPrice: 0,
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block: {
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difficulty: 0,
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number: 0,
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gasLimit: 0,
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timestamp: 0,
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time: 0,
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arrival: 0,
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propagation: 0,
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received: 0,
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transactions: [],
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uncles: []
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},
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propagationAvg: 0,
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latency: 0,
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uptime: 0,
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lastUpdate: 0
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};
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this.history = new Array(MAX_HISTORY);
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this.uptime = {
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started: null,
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history: []
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};
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this.init(data);
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return this;
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}
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Node.prototype.init = function(data)
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{
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_.fill(this.history, -1);
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if( this.id === null )
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{
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this.uptime.started = _.now();
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this.setState(true);
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}
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if( !_.isUndefined(data.id) )
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this.id = data.id;
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this.setInfo(data);
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if( !_.isUndefined(data.latency) )
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this.stats.latency = data.latency;
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return this;
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}
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Node.prototype.setInfo = function(data)
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{
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if( !_.isUndefined(data.info) )
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{
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this.info = data.info;
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if( _.isUndefined(data.info.canUpdateHistory) )
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data.info.canUpdateHistory = false;
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}
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if( !_.isUndefined(data.ip) )
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{
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if(data.ip === '::ffff:127.0.0.1')
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data.ip = '84.117.82.122';
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this.info.ip = data.ip;
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this.setGeo();
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}
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if( !_.isUndefined(data.spark) )
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this.spark = data.spark;
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var uptimeCnt = this.uptime.history.length;
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if( uptimeCnt > 0 && this.uptime.history[uptimeCnt - 1].status === 'down' )
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this.setState(true);
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return this;
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}
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Node.prototype.setGeo = function()
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{
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this.geo = geoip.lookup(this.info.ip);
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return this;
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}
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Node.prototype.getInfo = function()
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{
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return {
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id: this.id,
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info: this.info,
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geo: this.geo,
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stats: this.stats,
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history: this.history
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};
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}
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Node.prototype.setStats = function(stats, history)
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{
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if( !_.isUndefined(stats) && !_.isUndefined(stats.block) && !_.isUndefined(stats.block.number) )
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{
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this.history = history;
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var positives = _.filter(history, function(p) {
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return p >= 0;
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});
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if(positives.length > 0)
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stats.propagationAvg = Math.round( _.sum(positives) / positives.length );
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else
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stats.propagationAvg = 0;
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this.stats = stats;
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return this.getStats();
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}
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return false;
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}
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Node.prototype.setLatency = function(latency)
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{
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if( !_.isUndefined(latency) )
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{
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this.stats.latency = latency;
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return {
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id: this.id,
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latency: latency
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};
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}
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return false;
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}
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Node.prototype.getStats = function()
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{
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return {
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id: this.id,
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stats: this.stats,
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history: this.history
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};
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}
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Node.prototype.setState = function(active)
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{
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this.stats.active = active;
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this.uptime.history.push({
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status: (active ? 'up' : 'down'),
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time: _.now()
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});
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}
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Node.prototype.getBlockNumber = function()
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{
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return this.stats.block.number;
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}
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Node.prototype.canUpdate = function()
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{
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return this.info.canUpdateHistory || false;
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}
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module.exports = Node;
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