import winston from 'winston';
// Force no colors for MCP server mode - multiple approaches
process.env.NO_COLOR = '1';
process.env.FORCE_COLOR = '0';
export const logger = winston.createLogger({
level: process.env.LOG_LEVEL || 'info',
format: winston.format.combine(
winston.format.timestamp(),
winston.format.errors({ stack: true }),
winston.format.splat(),
// Remove all colors and use simple JSON format
winston.format.uncolorize(),
winston.format.printf(({ timestamp, level, message, ...meta }) => {
// Always output plain JSON for MCP compatibility
return JSON.stringify({
timestamp,
level,
message,
...meta
});
})
),
defaultMeta: { service: 'youtrack-mcp' },
transports: [
new winston.transports.File({ filename: 'error.log', level: 'error' }),
new winston.transports.File({ filename: 'combined.log' }),
new winston.transports.Console({
// Send ALL log levels to stderr (not stdout) for MCP compatibility
// MCP servers must only write JSON-RPC messages to stdout
stderrLevels: ['error', 'warn', 'info', 'debug', 'verbose', 'silly'],
// Explicitly disable colors
format: winston.format.combine(
winston.format.uncolorize(),
winston.format.printf(({ timestamp, level, message, ...meta }) => {
return JSON.stringify({
timestamp,
level,
message,
...meta
});
})
)
})
],
});
// Helper function for logging API calls
export function logApiCall(method: string, endpoint: string, params?: any): void {
logger.info('API Call', {
method,
endpoint,
params: params ? JSON.stringify(params) : undefined,
timestamp: new Date().toISOString(),
});
}
// Helper function for logging errors
export function logError(error: Error, context?: any): void {
logger.error('Error occurred', {
message: error.message,
stack: error.stack,
context,
timestamp: new Date().toISOString(),
});
}
