"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const redis_1 = require("redis");
const loggers_1 = require("./loggers");
const loggers = {
    main: (0, loggers_1.getLogger)('redis'),
    cacher: (0, loggers_1.getLogger)('redis/cache'),
    controller: (0, loggers_1.getLogger)('redis/controller'),
    replica: (0, loggers_1.getLogger)('redis/replica'),
    agent: (0, loggers_1.getLogger)('redis/agent'),
};
class default_1 {
    constructor(opt) {
        this.chatAsString = (chat) => `${chat.chatType}:${chat.chatID.toString()}`;
        this.cacheContent = (contentId, content) => new Promise((resolve, reject) => this.client.set(`content/${contentId}`, content, 'EX', 3600 * 24, (err, res) => err ? reject(err) : resolve(res))).then(res => {
            loggers.cacher.debug(`cached content ${contentId}, result: ${res}`);
        }).catch((err) => {
            loggers.cacher.error(`failed to cache content ${contentId}, error: ${err}`);
        });
        this.cacheForChat = (postId, target) => {
            const targetStr = this.chatAsString(target);
            return new Promise((resolve, reject) => this.client.set(`sent/${targetStr}/${postId}`, 'true', 'EX', this.expireAfter, (err, res) => err ? reject(err) : resolve(res))).then(res => {
                loggers.cacher.debug(`cached post ${postId} for ${targetStr}, result: ${res}`);
            }).catch((err) => {
                loggers.cacher.error(`failed to cache post ${postId} for ${targetStr}, error: ${err}`);
            });
        };
        this.getContent = (contentId) => new Promise((resolve, reject) => this.client.get(`content/${contentId}`, (err, res) => err ? reject(err) : resolve(res))).then(res => {
            loggers.cacher.debug(`retrieved cached content ${contentId}, result: ${res}`);
            return res;
        }).catch((err) => {
            loggers.cacher.error(`failed to retrieve cached content ${contentId}, error: ${err}`);
            throw err;
        });
        this.startProcess = (processId) => {
            const logger = loggers.agent;
            this.client.publish(`twitter:locks`, `WIP:${processId}`, (err, res) => {
                if (err) {
                    return logger.error(`error notifying subscription client about WIP:${processId}, result: ${res}`);
                }
                logger.debug(`notified subscription client to start tracking ${processId}, result: ${res}`);
            });
            this.subscriber.subscribe(`twitter:lock/${processId}`, err => {
                if (err)
                    logger.error(`failed to subscribe to own process lock, error: ${err}`);
            });
        };
        this.finishProcess = (processId) => {
            this.client.publish(`twitter:lock/${processId}`, 'DONE');
        };
        this.waitForProcess = (processId, timeout) => {
            const logger = loggers.agent;
            if (!(processId in this.subscriptions)) {
                logger.debug(`creating new waiting function for ${processId}...`);
                let timeoutHandle;
                this.subscriptions[processId] = new Promise((resolve, reject) => {
                    this.subscriber.on('message', (channel, message) => {
                        logger.debug(`received status notification from channel ${processId}, status: ${message}`);
                        if (channel === `twitter:lock/${processId}`) {
                            if (message === 'DONE')
                                return resolve();
                            if (message === 'BREAK')
                                return reject();
                        }
                        if (channel === `twitter:ping/${processId}`) {
                            this.subscriber.unsubscribe(`twitter:ping/${processId}`, err => {
                                if (err) {
                                    return logger.error(`failed to unsubscribed from reply channel for pinging ${processId}, error: ${err}`);
                                }
                                logger.debug(`successfully unsubscribed from reply channel for pinging ${processId}`);
                            });
                            if (message === 'WIP') {
                                this.subscriber.subscribe(`twitter:lock/${processId}`, err => {
                                    if (err)
                                        logger.error(`failed to subscribe to status channel of process ${processId}, error: ${err}`);
                                    logger.debug(`successfully subscribed to status channel of process ${processId}`);
                                });
                            }
                            if (message === 'NONE')
                                return resolve();
                        }
                    });
                    timeoutHandle = setTimeout(() => {
                        this.client.publish(`twitter:lock/${processId}`, 'BREAK', err => {
                            if (err) {
                                logger.error(`failed while calling to remove process lock ${processId}, error: ${err}`);
                            }
                            else {
                                logger.warn(`timed out waiting for process ${processId}, give up waiting`);
                            }
                        });
                    }, timeout);
                    this.subscriber.subscribe(`twitter:ping/${processId}`, err => {
                        if (err) {
                            logger.error(`failed to subscribe to reply channel for pinging ${processId}, error: ${err}`);
                            reject();
                        }
                    });
                    this.client.publish(`twitter:locks`, `PING:${processId}`, (err, res) => {
                        if (err) {
                            return logger.error(`error pinging process ${processId} via subscription client, result: ${res}`);
                        }
                        logger.debug(`pinged process ${processId} via subscription client, result: ${res}`);
                    });
                }).finally(() => {
                    clearTimeout(timeoutHandle);
                    logger.debug(`deleting waiting function for ${processId}...`);
                    delete this.subscriptions[processId];
                });
            }
            return this.subscriptions[processId];
        };
        this.isCachedForChat = (postId, target) => {
            const targetStr = this.chatAsString(target);
            return new Promise((resolve, reject) => this.client.exists(`sent/${targetStr}/${postId}`, (err, res) => err ? reject(err) : resolve(res))).then(res => {
                loggers.cacher.debug(`retrieved status of post ${postId} for ${targetStr}, result: ${res}`);
                return Boolean(res);
            }).catch((err) => {
                loggers.cacher.error(`failed to retrieve status of post ${postId} for ${targetStr}, error: ${err}`);
                return false;
            });
        };
        this.client = (0, redis_1.createClient)({
            host: opt.redisHost,
            port: opt.redisPort,
        });
        this.subscriber = this.client.duplicate();
        let logger = loggers.main;
        this.client.pubsub('NUMSUB', 'twitter:locks', (err, reply) => {
            if (err) {
                logger.fatal(`failed to query subscribers of global lock registry, error: ${err}`);
                process.exit(1);
            }
            logger.debug(`subscribers of global lock registry: ${reply[1]}`);
            if (reply[1] === 0) {
                logger = loggers.controller;
                this.subscriber.subscribe('twitter:locks', err => {
                    if (err) {
                        logger.fatal(`failed to subscribe to global lock registry, error: ${err}`);
                        process.exit(1);
                    }
                    logger.info(`nobody monitoring global lock registry, taken over now`);
                });
            }
            else {
                logger = loggers.replica;
            }
            this.subscriber.psubscribe(`twitter:lock/*`, err => {
                if (err)
                    return logger.error(`failed to subscribe to active process locks, error: ${err}`);
                logger.debug(`monitoring all active locks`);
            });
            this.subscriber.on('message', (channel, message) => {
                if (channel === 'twitter:locks') {
                    const match = /^(WIP|PING):(.+)$/.exec(message);
                    if (!match)
                        return;
                    const processId = match[2];
                    if (match[1] === 'WIP') {
                        this.subscriber.subscribe(`twitter:lock/${processId}`, err => {
                            if (err)
                                return logger.error(`failed to subscribe to process lock ${processId}, error: ${err}`);
                            logger.info(`received notification from process ${processId}, accepting messages on channel...`);
                        });
                    }
                    if (match[1] === 'PING') {
                        logger.debug(`received ping request to process ${processId}, checking channel activity...`);
                        this.client.pubsub('NUMSUB', `twitter:lock/${processId}`, (err, reply) => {
                            if (err) {
                                logger.error(`failed to query subscribers of process lock ${processId}, error: ${err}`);
                            }
                            const count = reply[1] || 0;
                            const statusMsg = count > 0 ? 'WIP' : 'NONE';
                            logger.debug(`status of channel ${processId}: ${statusMsg}`);
                            this.client.publish(`twitter:ping/${processId}`, statusMsg, err => {
                                if (err) {
                                    return logger.error(`failed to send response to subscribers of process lock ${processId}, error: ${err}`);
                                }
                                logger.info(`notified subscribers that process ${processId} ${count > 0 ? 'is running' : 'does not exist'}`);
                            });
                        });
                    }
                }
                else {
                    const match = /^twitter:lock\/(.+)$/.exec(channel);
                    if (!match)
                        return;
                    const processId = match[1];
                    if (message === 'DONE')
                        logger.info(`received notification that process ${processId} finished successfully`);
                    if (message === 'BREAK')
                        logger.warn(`received notification that process ${processId} was terminated prematurely`);
                    this.subscriber.unsubscribe(channel, err => {
                        if (err)
                            return logger.error(`failed to unsubscribe from process lock ${processId}, error: ${err}`);
                        logger.info(`successfully unsubscribed from process lock ${processId}`);
                    });
                }
            });
        });
        this.subscriptions = {};
        this.expireAfter = opt.redisExpireTime;
        loggers.main.info(`loaded redis service at ${opt.redisHost}:${opt.redisPort}`);
    }
}
exports.default = default_1;