const logger = require('./logger');
const config = require('../config/env');

//全局限流配置
let requestCount = 0;
let lastResetTime = Date.now();

//熔断检查器
function checkCircuitBreaker() {
    const now = Date.now();
    if (now - lastResetTime > config.app.rate) {
        requestCount = 0;
        lastResetTime = now;
    }
    requestCount++;
    if (requestCount > config.app.maxRequests) {
        const msg = `Circuit breaker triggered: Exceeded ${config.app.maxRequests} requests in ${config.app.rate/1000}s. Exiting...`;
        
        //同步写入fatal日志
        logger.fatal("============================");
        logger.fatal(`${msg}`);
        logger.fatal("============================");
        if (!config.app.debugMode) {
            process.exit(1);
        } else {
            logger.warn('Debug mode enabled, not exiting.');
            requestCount = 0;
        }
        return false;
    }
    return true;
}

module.exports = { checkCircuitBreaker };