var mongoose = require('mongoose');
var Schema = mongoose.Schema;

//1.短暫屏蔽 2.永久屏蔽
var degree = {TEMP:1, FOREVER:2};

/**
 * 黑名單
 * @type {Schema}
 *
 * @param ip {String} 黑名單Ip
 * @param createAt {Date} 創(chuàng)建時(shí)間
 * @param expireTime {Date} 如果是短暫屏蔽，屏蔽到期時(shí)間
 * @param forbiddenDegree {Number} 屏蔽級(jí)別 1.短暫屏蔽 2.永久屏蔽
 * @param reason {String} 屏蔽原因
 */
var BlackList = new Schema({
    ip:{
        type: String,
        index:true
    },
    createAt:{
        type: Date,
        default: Date.now
    },
    expireTime:{
        type: Date
    },
    forbiddenDegree:{
        type: Number,
        default:degree.TEMP
    },
    reason:{
        type: String,
        default: '請(qǐng)求次數(shù)頻繁'
    }
});

mongoose.model('BlackList', BlackList);

'use strict';

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var ObjectId = Schema.ObjectId;

/**
 * 記錄參與調(diào)查問卷的回復(fù)與Ip
 * @type {Schema}
 *
 * @param answerId {ObjectId} 回復(fù)Id
 * @param createAt {Date} 創(chuàng)建時(shí)間
 * @param ip {String} 參與回復(fù)的人Ip
 */
var IpAnswerLog = new Schema({
    answerId: {
        type: ObjectId
    },
    createAt: {
        type: Date,
        default:Date.now
    },
    ip:{
        type: String,
        index:true
    }
});

mongoose.model('IpAnswerLog', IpAnswerLog);

var IpAnswerLog = require('../models').IpAnswerLog;

/**
 * 新建并保存
 * @param ipAnswerLog {Schema or dict}
 * @param callback
 */
var newAndSave = function(ipAnswerLog, callback){
    if(ipAnswerLog instanceof IpAnswerLog){
        ipAnswerLog.save(callback);
    }else{
        var m = new IpAnswerLog(ipAnswerLog);
        m.save(callback);
    }
}

/**
 * 一分鐘內(nèi)回復(fù)數(shù)
 * @param ip
 * @param callback
 */
var countOneMinuteAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*1;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 一小時(shí)內(nèi)回復(fù)數(shù)字
 * @param ip
 * @param callback
 */
var countOneHourAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*60*1;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 一天內(nèi)回復(fù)
 * @param ip
 * @param callback
 */
var countOneDayAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*60*24;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 計(jì)算某段時(shí)間內(nèi)回復(fù)數(shù)
 * @param beginTime {Number} 開始時(shí)間 時(shí)間戳
 * @param endTime   {Number} 結(jié)束時(shí)間 如果為null，使用當(dāng)前時(shí)間 時(shí)間戳
 * @param ip    {String} Ip地址
 * @param callback
 */
var countIpAnswerByTime = function(beginTime, endTime, ip, callback){
    if(!endTime){
        endTime = Date.now();
    }
    IpAnswerLog.count({ip:ip, '$and':{$lt:beginTime, $gt:endTime}}, callback);
}

exports.countIpAnswerByTime =countIpAnswerByTime;
exports.countOneDayAnswer = countOneDayAnswer;
exports.countOneHourAnswer = countOneHourAnswer;
exports.countOneMinuteAnswer = countOneMinuteAnswer;
exports.newAndSave = newAndSave;

/**
 * 新建并保存
 * @param backList {BlackList} or {dict} 黑名單數(shù)據(jù)
 * @param callback
 */
var newAndSave = function(backList, callback){
    if(backList instanceof BlackList){
        backList.save(callback);
    }else{
        var m = new BlackList(backList);
        m.save(callback);
    }
}

/**
 * 禁用Ip訪問一小時(shí)
 * @param ip {String}
 * @param callback
 */
var newAndSaveOneHourTempForbidden = function(ip, callback){
    var expireTime = Date.now() + 1000*60*60;
    newAndSaveTempForbidden(ip,expireTime, callback);
}

/**
 * 禁用一天
 * @param ip {String}
 * @param callback
 */
var newAndSaveOneDayTempForbidden = function(ip, callback){
    var expireTime = Date.now() + 1000*60*60*24;
    newAndSaveTempForbidden(ip, expireTime, callback);
}

/**
 * 新建臨時(shí)黑名單
 * @param ip {String}
 * @param expireTime {Number} 到期時(shí)間
 * @param callback
 */
var newAndSaveTempForbidden = function(ip, expireTime,callback){
    var blackList = new BlackList({ip:ip, expireTime:expireTime, forbiddenDegree:1});
    newAndSave(blackList, callback);
}

/**
 * 新建并保存永久黑名單
 * @param ip
 * @param callback
 */
var newAndSaveForeverForbidden = function(ip, callback){
    var blackList = new BlackList({ip:ip, forbiddenDegree:2});
    newAndSave(blackList, callback);
}

/**
 * 判斷是否在黑名單中
 * @param ip {String} Ip地址
 * @param callback
 */
var isInBlackList = function(ip, callback){
    getBlackListByIp(ip, function(err, blackList){
        if(err){
            callback(err);
        }else if(blackList){
            var currentDate = Date.now();
            if(blackList.forbiddenDegree ===1 && blackList.expireTime> currentDate){
                removeBlackListByIp(ip, function(err){
                    if(err){
                        callback(err);
                    }else{
                        callback(null, false);
                    }
                })
            }else{
                callback(null, true);
            }
        }else{
            callback(null, false);
        }
    })
}

/**
 * 通過Ip獲取黑名單條目
 * @param ip
 * @param callback
 */
var getBlackListByIp = function(ip, callback){
    BlackList.findOne({ip:ip}, callback);
}

/**
 * 根據(jù)Ip刪除黑名單
 * @param ip
 * @param callback
 */
var removeBlackListByIp = function(ip, callback){
    getBlackListByIp(ip, function(err, blackList){
        if(err){
            callback(err);
        }else if(blackList){
            blackList.remove(callback);
        }else{
            callback(null,null);
        }
    })
}

exports.newAndSave = newAndSave;
exports.isInBlackList = isInBlackList;
exports.getBlackListByIp = getBlackListByIp;
exports.removeBlackListByIp = removeBlackListByIp;
exports.newAndSaveOneHourTempForbidden = newAndSaveOneHourTempForbidden;
exports.newAndSaveOneDayTempForbidden = newAndSaveOneDayTempForbidden;
exports.newAndSaveForeverForbidden = newAndSaveForeverForbidden;
exports.newAndSaveTempForbidden = newAndSaveTempForbidden;

var BlackListProxy = require('../../proxy').BlackListPorxy;
var IpAnswerLogProxy = require('../../proxy').IpAnswerLogProxy;
var EventProxy = require('eventproxy');

/**
 * 判斷是否需要將Ip移動(dòng)至黑名單中
 * @param req
 * @param res
 * @param next
 */
var isNeedMoveToBlackList = function(req, res, next){
    var ip = req.ip;
    //判斷是否在黑名單中
    requireNotInBlackList(req, res, function(){
        var ep = new EventProxy();
        ep.fail(next);

        ep.all('minuteCount', 'hourCount', 'dayCount', function(minuteCount, hourCount, dayCount){
            if(minuteCount > 10){
                BlackListProxy.newAndSaveOneHourTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交過于頻繁,1小時(shí)后重試!');
                    }
                });
            }else if(hourCount > 100){
                BlackListProxy.newAndSaveOneDayTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交過于頻繁,1天后重試!');
                    }
                })
            }else if(dayCount > 1000){
                BlackListProxy.newAndSaveOneDayTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交過于頻繁，1天后重試！');
                    }
                })
            }else{
                return next();
            }
        })

        IpAnswerLogProxy.countOneMinuteAnswer(ip,ep.done('minuteCount'));
        IpAnswerLogProxy.countOneHourAnswer(ip, ep.done('hourCount'));
        IpAnswerLogProxy.countOneDayAnswer(ip, ep.done('dayCount'));
    });
}

/**
 * 中間件 要求Ip不在黑名單中
 * @param req
 * @param res
 * @param next
 */
var requireNotInBlackList = function(req, res, next){
    var ip = req.ip;
    BlackListProxy.isInBlackList(ip, function(err, result){
        if(err){
            next(err);
        }else if(result){
            return res.send('您的Ip禁止提交,如有疑問請(qǐng)聯(lián)系lihui.wang@tulingdao.com');
        }else{
            next();
        }
    })
}

exports.isNeedMoveToBlackList = isNeedMoveToBlackList;
exports.requireNotInBlackList = requireNotInBlackList;