snglpi/src/utils/logger.js

const winston = require('winston');
const path = require('path');
require('winston-daily-rotate-file');
const fs = require('fs');

// verifica se a pasta de logs existe, se não, cria
const logsDir = path.join(__dirname, '../../logs');
if (!fs.existsSync(logsDir)) {
    fs.mkdirSync(logsDir, { recursive: true });
}

const isProduction = process.env.NODE_ENV === 'production';
const logLevel = process.env.LOG_LEVEL || 'info';
const logToConsole = process.env.LOG_TO_CONSOLE
    ? process.env.LOG_TO_CONSOLE === 'true'
    : !isProduction;

// Configuração do logger com winston
const logger = winston.createLogger({
    level: logLevel,
    format: winston.format.combine(winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }), winston.format.errors({ stack: true })),
    transports: [
        // Log geral da aplicação
        new winston.transports.DailyRotateFile({
            filename: path.join(logsDir, 'app-%DATE%.log'),
            datePattern: 'YYYY-MM-DD',
            zippedArchive: true,
            maxSize: '5m',
            maxFiles: '10d',
            format: winston.format.combine(
                winston.format.printf((info) => {
                    const { timestamp, level, message, stack, ...meta } = info;
                    let logMessage = `${timestamp} [${level}]: ${message}${stack ? `\n${stack}` : ''}`;
                    if (Object.keys(meta).length) {
                        logMessage += ` ${JSON.stringify(meta, null, 2)}`;
                    }
                    return logMessage;
                })
            ),
        }),
        // Log de erros
        new winston.transports.DailyRotateFile({
            filename: path.join(logsDir, 'error-%DATE%.log'),
            level: 'error',
            datePattern: 'YYYY-MM-DD',
            zippedArchive: true,
            maxSize: '5m',
            maxFiles: '10d',
            format: winston.format.combine(
                winston.format.printf((info) => {
                    const { timestamp, level, message, stack, ...meta } = info;
                    let logMessage = `${timestamp} [${level}]: ${message}${stack ? `\n${stack}` : ''}`;
                    if (Object.keys(meta).length) {
                        logMessage += ` ${JSON.stringify(meta, null, 2)}`;
                    }
                    return logMessage;
                })
            ),
        })
    ],
});

// Log no console (controlado por variavel de ambiente)
if (logToConsole) {
    logger.add(new winston.transports.Console({
        format: winston.format.combine(
            winston.format.colorize(),
            winston.format.printf((info) => {
                const { timestamp, level, message, stack, ...meta } = info;
                let logMessage = `${timestamp} [${level}]: ${message}${stack ? `\n${stack}` : ''}`;
                if (Object.keys(meta).length) {
                    logMessage += ` ${JSON.stringify(meta, null, 2)}`;
                }
                return logMessage;
            })
        )
    }));
}

// Funções utilitárias
const logError = (error, context = '') => {
    if (error instanceof Error) {
        logger.error(`${context} - ${error.message}`, { stack: error.stack });
    } else {
        logger.error(`${context} - ${error}`);
    }
};

const logInfo = (message, meta = {}) => {
    logger.info(message, meta);
};

const logWarning = (message, meta = {}) => {
    logger.warn(message, meta);
};

const logDebug = (message, meta = {}) => {
    logger.debug(message, meta);
};

// Log de sincronização específico. Fica em debug: por causa da margem de seguranca do
// watermark, esse log dispara toda vez que ha qualquer ticket "quente" no lote, mesmo sem
// mudanca real de campo - o sinal de mudanca de verdade e logado no chamador.
const logSync = (service, count, type) => {
    logger.debug(`SYNC: ${service} - ${count} ${type} sincronizados`, {
        service,
        count,
        type
    });
};

module.exports = {
    logger,
    logError,
    logInfo,
    logWarning,
    logDebug,
    logSync,
};