import { ERROR_MESSAGES } from '../constants';

/**
 * Handles API request errors and returns user-friendly messages
 * @param {Error} error - The error object from axios
 * @returns {Object} - Error object with user-friendly message
 */
export const handleRequestError = (error) => {
  if (error.code === 'ECONNABORTED') {
    return { error: ERROR_MESSAGES.CONNECTION_TIMEOUT };
  }
  if (error.response) {
    return { error: `${ERROR_MESSAGES.SERVICE_ERROR}: ${error.response.status}` };
  }
  if (error.request) {
    return { error: ERROR_MESSAGES.SERVICE_UNAVAILABLE };
  }
  return { error: ERROR_MESSAGES.UNKNOWN_ERROR };
};

/**
 * Determines service status based on availability count
 * @param {number} availableCount - Number of available services
 * @param {number} totalCount - Total number of services
 * @returns {string} - Service status
 */
export const determineServiceStatus = (availableCount, totalCount) => {
  if (availableCount === 0) return 'offline';
  if (availableCount === totalCount) return 'online';
  return 'partial';
};

/**
 * Formats service data for display
 * @param {Object} serviceData - Raw service data
 * @returns {Array} - Formatted service array
 */
export const formatServiceData = (serviceData) => {
  if (!serviceData || typeof serviceData !== 'object') {
    return [];
  }
  
  return Object.entries(serviceData).map(([key, service]) => ({
    name: service.name || key.charAt(0).toUpperCase() + key.slice(1).replace('_', ' '),
    status: service.status === 'healthy' ? 'online' : 
            service.status === 'unknown' ? (service.enabled ? 'offline' : 'disabled') : 'offline',
    uptime: service.uptime || '0d 0h'
  }));
};

/**
 * Formats event data for display
 * @param {Array} events - Raw event data
 * @returns {Array} - Formatted event array
 */
export const formatEventData = (events) => {
  if (!Array.isArray(events)) {
    return [];
  }
  
  return events.map(event => ({
    time: new Date(event.timestamp).toLocaleString(),
    event: `${event.event_type} from ${event.service}`,
    service: event.service
  }));
};