import winston from 'winston';
import { formatMemoryUsage, getMemoryUsage } from './memory.js';
// Map winston levels to Cloud Logging severity levels
// https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#LogSeverity
const cloudLoggingSeverity = winston.format((info) => {
const severityMap: Record<string, string> = {
error: 'ERROR',
warn: 'WARNING',
info: 'INFO',
debug: 'DEBUG',
};
info.severity = severityMap[info.level] || 'DEFAULT';
return info;
});
// Configure transports based on environment
function createLogger() {
const isProduction = process.env.NODE_ENV === 'production';
// Use Console transport for both environments
// Cloud Run automatically sends stdout to Cloud Logging
const transports: winston.transport[] = [
new winston.transports.Console({
format: isProduction
? winston.format.combine(cloudLoggingSeverity(), winston.format.json())
: winston.format.combine(winston.format.timestamp(), winston.format.json()),
}),
];
return winston.createLogger({
level: isProduction ? 'info' : 'debug',
transports,
});
}
// Create and export the logger instance
export const logger = createLogger();
// Utility logging functions
export function logDebug(message: string, context?: Record<string, unknown>): void {
logger.debug({
message,
...context,
});
}
export function logInfo(message: string, context?: Record<string, unknown>): void {
logger.info({
message,
...context,
});
}
export function logWarning(message: string, context?: Record<string, unknown>): void {
logger.warn({
message,
...context,
});
}
export function logError(message: string, error?: Error, context?: Record<string, unknown>): void {
logger.error({
message,
error: error
? {
message: error.message,
stack: error.stack,
}
: undefined,
...context,
});
}
/**
* Log current memory usage with optional context
*/
export function logMemoryUsage(message: string, context?: Record<string, unknown>): void {
const memoryUsage = getMemoryUsage();
logger.info({
message: `${message} - Memory: ${formatMemoryUsage(memoryUsage)}`,
memory: memoryUsage,
...context,
});
}
