import { GOOD_QUALITY } from './../consts/consts';
import { RoleModel } from "../db/Role";
import * as Redis from 'redis';
import {REDIS_KEY} from '../consts/consts'
import { GameModel } from "../db/Game";
import { promisifyAll } from 'bluebird';

// 映射 redis 接口
declare module 'redis' {
    export interface RedisClient extends NodeJS.EventEmitter {
        hdelAsync(...args: any[]): Promise<any>;
        spopAsync(...args: any[]): Promise<any>;
        sremAsync(...args: any[]): Promise<any>;
        sismemberAsync(...args: any[]): Promise<any>;
        srandmemberAsync(...args: any[]): Promise<any>;
        delAsync(...args: any[]): Promise<any>;
    }
    export interface Multi extends Commands<Multi> {
        execAsync(...args: any[]): Promise<any>;
    }
}

let redisArr = 'r-8vb4i2kgl91886fkxd.redis.zhangbei.rds.aliyuncs.com';
if(process.env.NODE_ENV == 'local') {
    redisArr = '127.0.0.1';
}
// 创建 redis 连接
const oldRedisClient = Redis.createClient(6379, redisArr, {detect_buffers: true});
oldRedisClient.auth('zyz_2020', (err, reply) => {
    if (err) {
        console.log('redis err', err);
    } else {
        console.log('redis suc');
    }
})

// 转 promise
const client = promisifyAll(oldRedisClient) as Redis.RedisClient;
client.set('hello', 'redis', Redis.print);

/**
 * 在服务重新启动时，将信息存入redis
 */
export async function initAllRank() {
    const serverList = await GameModel.getAllServerList();
    await redisDel(REDIS_KEY.USER_INFO);
    for(let {id} of serverList) {
        await redisDel(getKeyName(REDIS_KEY.TOWER_RANK, id));
        await initRank(id);
    }
}

export async function initRank(serverId: number) {
    // console.log('*****', 'initRank')
    await redisExpire(getKeyName(REDIS_KEY.TOWER_RANK, serverId), 30 * 24 * 60 * 60);
    await redisExpire(REDIS_KEY.USER_INFO, 30 * 24 * 60 * 60);

    let ranks = await RoleModel.getRank('tower', serverId, ['roleId', 'roleName', 'towerLv', 'lv', 'vLv']);
    for(let {towerLv, roleId, roleName, lv, vLv, towerUpTime} of ranks) {
        // console.log(roleId);
        await redisZadd(getKeyName(REDIS_KEY.TOWER_RANK, serverId), encodeScoreWithTime(towerLv, towerUpTime?towerUpTime.getTime():0), roleId);
        await redisUserInfoAdd(roleId, {roleName, lv, vLv, guildName:"", head: "zhaoyun"});
    }
}

// 排行榜是否存在
export async function existsRank(key: string, serverId: number) {
    const result = await redisExists(getKeyName(key, serverId));
    return result;
}

export function getKeyName(key: string, serverId: number) {
    return `${key}:${serverId}`;
}

// 更新玩家信息
export async function redisUserInfoUpdate(roleId: string, arr: Array<{field: string, value:(string|number)}>) {
    let params = await redisHget(REDIS_KEY.USER_INFO, roleId);
    if(params) {
        let obj = JSON.parse(params);
        for(let {field, value} of arr) {
            obj[field] = value;
        }
        return await redisHset(REDIS_KEY.USER_INFO, roleId, JSON.stringify(obj));
    }
}

// 添加玩家信息缓存
export async function redisUserInfoAdd(roleId: string, params: {roleName: string, lv: number, vLv: number, guildName: string, head: string}) {
    let value = JSON.stringify(params);
    return await redisHset(REDIS_KEY.USER_INFO, roleId, value);
}

// 更新排行榜
export async function setRank(key: string, serverId: number, roleId: string, score: number, timestamp: number, params: {roleName: string, lv: number, vLv: number, guildName: string, head: string}) {
    // 更新分数
    const _score = encodeScoreWithTime(score, timestamp);
    await redisZadd(getKeyName(key, serverId), _score, roleId);
    // 移除100名以外
    await redisZremRangeByRank(getKeyName(key, serverId), 100, 10000);
    // 如果没有信息，更新玩家信息
    const hasCurUser = await redisHexists(REDIS_KEY.USER_INFO, roleId);
    if(!hasCurUser) {
        await redisUserInfoAdd(roleId, params);
    }
    return true;
}

// 获取排行榜
export async function getRank(key: string, serverId: number, roleId: string) {
    let ranks = [], myRank = null;
    const rankFromDb = await redisZrevrangeByScore(getKeyName(key, serverId), '+inf', '-inf', true, 100);
    for(let ii = 0; ii < rankFromDb.length; ii+=2) {
        const _roleId = rankFromDb[ii];
        const _score = decodeScoreWithTime(rankFromDb[ii + 1]);
        const userInfo = await redisHget(REDIS_KEY.USER_INFO, _roleId);
        const _userInfo = JSON.parse(userInfo);
        const tmp = {..._userInfo, roleId: _roleId, num: _score, rank: Math.floor(ii/2)+1}
        ranks.push(tmp);
        if(roleId == _roleId) myRank = tmp;
    }
    return {ranks, myRank}
}

// 有序排行综合时间和得分排序
function encodeScoreWithTime(score: number, timestamp: number): number {
    // value = score * Math.power(10, 14) + max_time - timestamp
    let timelen = 13;
    let pow = Math.pow(10, timelen + 1);
    return score * pow + pow - 1 - timestamp
}

function decodeScoreWithTime(num: string): number {
    let timelen = 13;
    let pow = Math.pow(10, timelen + 1);
    let _num = parseInt(num);
    return Math.floor(_num/pow);
}

/**************** 寻宝相关 start */

// 把寻宝的玩家信息存入 redis
export async function setTeamSearchReq(roleId: string, sid: string, qualityArr: Array<number>) {
    let cmds = [];
    qualityArr.forEach(quality => {
        if (quality) {
            cmds.push(['sadd', `${REDIS_KEY.COM_TEAM_SEARCH_PRE}${quality}`, `${roleId}:${sid}`]);
        }
    });
    const multiClient = client.multi(cmds) as Redis.Multi;
    const newMulti = promisifyAll(multiClient) as Redis.Multi;
    const res = await newMulti.execAsync();
    console.log('setTeamSearchReq: ', res);
    return res;
}

// 取出 0 - 2 个某品质的匹配中玩家，并在其它品质中删除此玩家信息
export async function rmRoleFromQueue(roleId: string, sid: string, qualityArr: Array<number>) {
    let cmds = [];
    for (let q of qualityArr) {
        cmds.push(['srem', `${REDIS_KEY.COM_TEAM_SEARCH_PRE}${q}`, `${roleId}:${sid}`]);
    };
    const multiClient = client.multi(cmds) as Redis.Multi;
    const newMulti = promisifyAll(multiClient) as Redis.Multi;
    await newMulti.execAsync();
}

export async function getTeamSearchByQuality(quality: number) {
    // TODO: 操作不具有原子性
    const userInfos = await client.srandmemberAsync(`${REDIS_KEY.COM_TEAM_SEARCH_PRE}${quality}`, 2);
    console.log('getTeamSearchByQuality: ' + userInfos);
    if (!userInfos || !userInfos.length) return null;

    let cmds = [];
    let res = [];
    for (let userInfo of userInfos) {
        const decodeData = `${userInfo}`.split(':');
        if (decodeData.length !== 2) return null;

        res.push({roleId: decodeData[0], sid: decodeData[1]});
        GOOD_QUALITY.forEach((q) => {
            cmds.push(['srem', `${REDIS_KEY.COM_TEAM_SEARCH_PRE}${q}`, userInfo]);
        })
        const multiClient = client.multi(cmds) as Redis.Multi;
        const newMulti = promisifyAll(multiClient) as Redis.Multi;
        await newMulti.execAsync();
    }
    console.log('getTeamSearchByQuality res: ', res);
    return res;
}

export async function checkRoleInQueue(roleId: string, sid: string, qualityArr: Array<number>) {
    for (let quality of qualityArr) {
        let res = await client.sismemberAsync(`${REDIS_KEY.COM_TEAM_SEARCH_PRE}${quality}`, `${roleId}:${sid}`);
        if (res) {
            return true;
        }
    };
    return false;
}

export async function clearComBtlQueue() {
    for (let q of GOOD_QUALITY) {
        client.delAsync(`${REDIS_KEY.COM_TEAM_SEARCH_PRE}${q}`);
    }
}

/**************** 寻宝相关 end */

////// redis方法

//// key

// key 是否存在。
export async function redisExists(key: string) {
    return await createPromise('exists', [key]);
}

// 在 key 存在时删除 key。
export async function redisDel(key: string) {
    return await createPromise('del', [key]);
}

// 设置过期时间
export async function redisExpire(key: string, seconds: number) {
    return await createPromise('expire', [key, seconds]);
}

//// 有序集合

// 返回有序集中指定分数区间内的成员，分数从高到低排序
export async function redisZrevrangeByScore(key: string, max: (number|string), min: (number|string), withscores: boolean, limit?:number, offset=0): Promise<Array<string>> {
    let param = [key, max, min];
    if(withscores) param.push('WITHSCORES');
    if(limit) param.push('LIMIT', offset, limit);
    return await createPromise('zrevrangebyscore', param);
}

// 向有序集合添加一个或多个成员，或者更新已存在成员的分数
export async function redisZadd(key: string, field: number, value: string) {
    return await createPromise('zadd', [key, field, value]);
}

// 获取有序集合的成员数
export async function redisZcard(key: string) {
    return await createPromise('zcard', [key]);
}

// 移除有序集合中给定的排名区间的所有成员
export async function redisZremRangeByRank(key: string, start: number, stop: number) {
    return await createPromise('zremrangebyrank', [key, start, stop]);
}

//// 哈希

// 将哈希表 key 中的字段 field 的值设为 value
export async function redisHset(key: string, field: string, value: string) {
    return await createPromise('hset', [key, field, value]);
}

// 获取存储在哈希表中指定字段的值。
export async function redisHget(key: string, field: string) {
    return await createPromise('hget', [key, field]);
}

// 获取存储在哈希表中指定字段的值。
export async function redisHexists(key: string, field: string) {
    return await createPromise('hexists', [key, field]);
}

///// 封装promise
function createPromise(type: string, params: Array<string|number|any>):Promise<any> {
    return new Promise((resolve, reject) => {
        const cb = function(err: Error, result: any) {
            if(err) {
                reject(err);
            } else {
                resolve(result);
            }
        };
        client[type].apply(client, [...params, cb]);
    });
}