index.js

const { loadConfig } = require('./lib/configLoader');
const HealthChecker = require('./lib/healthChecker');
const { createRouter } = require('./lib/middleware');

/**
 * Initialize catOrNot health monitoring
 * @param {string|object} configPathOrObject - Path to config file or config object
 * @returns {Router} Express router with health endpoint
 */
function catOrNot(configPathOrObject) {
  let config;

  if (typeof configPathOrObject === 'string') {
    // Load config from file
    config = loadConfig(configPathOrObject);
  } else if (typeof configPathOrObject === 'object') {
    // Use provided config object
    const { validateConfig } = require('./lib/configLoader');
    validateConfig(configPathOrObject);
    config = {
      endpoints: configPathOrObject.endpoints || [],
      checkInterval: configPathOrObject.checkInterval || 30000,
      timeout: configPathOrObject.timeout || 5000,
      healthPath: configPathOrObject.healthPath || '/health',
      enableMonitoring: configPathOrObject.enableMonitoring !== false,
      catImagePath: configPathOrObject.catImagePath || require('path').join(__dirname, 'cat.jpeg')
    };
  } else {
    throw new Error('Config must be a file path string or configuration object');
  }

  // Create health checker
  const healthChecker = new HealthChecker(config);

  // Start monitoring if enabled
  if (config.enableMonitoring) {
    healthChecker.startMonitoring();
  }

  // Create and return router
  const router = createRouter(healthChecker, config);

  // Attach health checker to router for manual control
  router.healthChecker = healthChecker;
  router.config = config;

  return router;
}

/**
 * Create a standalone health checker without Express router
 * @param {string|object} configPathOrObject - Path to config file or config object
 * @returns {HealthChecker} Health checker instance
 */
function createHealthChecker(configPathOrObject) {
  let config;

  if (typeof configPathOrObject === 'string') {
    config = loadConfig(configPathOrObject);
  } else {
    const { validateConfig } = require('./lib/configLoader');
    validateConfig(configPathOrObject);
    config = configPathOrObject;
  }

  return new HealthChecker(config);
}

module.exports = catOrNot;
module.exports.createHealthChecker = createHealthChecker;
module.exports.HealthChecker = HealthChecker;