/**
 * Configuration for Outlook MCP Server
 */
const path = require('path');
const os = require('os');

// Ensure we have a home directory path even if process.env.HOME is undefined
const homeDir = process.env.HOME || process.env.USERPROFILE || os.homedir() || '/tmp';

module.exports = {
  // Server information
  SERVER_NAME: "outlook-assistant-main",
  SERVER_VERSION: "1.0.0",
  
  // Test mode setting
  USE_TEST_MODE: process.env.USE_TEST_MODE === 'true',

  // Debug mode setting
  DEBUG_MODE: process.env.DEBUG_MODE === 'true',
  
  // Authentication configuration
  AUTH_CONFIG: {
    clientId: process.env.MS_CLIENT_ID || '',
    // Optional: set MS_CLIENT_SECRET for confidential client app registrations.
    // Public client apps (Allow public client flows enabled, no secret) leave this blank.
    clientSecret: process.env.MS_CLIENT_SECRET || '',
    scopes: ['Mail.Read', 'Mail.ReadWrite', 'Mail.Send', 'User.Read', 'Calendars.Read', 'Calendars.ReadWrite', 'MailboxSettings.ReadWrite', 'offline_access'],
    tokenStorePath: process.env.OUTLOOK_TOKEN_STORE_PATH || path.join(homeDir, '.outlook-mcp-tokens.json'),
    // Device code flow: polling interval in seconds (Microsoft returns the recommended interval)
    deviceCodePollingInterval: 5
  },
  
  // Microsoft Graph API
  GRAPH_API_ENDPOINT: 'https://graph.microsoft.com/v1.0/',
  
  // Calendar constants
  CALENDAR_SELECT_FIELDS: 'id,subject,start,end,location,bodyPreview,isAllDay,recurrence,attendees',

  // Email constants
  EMAIL_SELECT_FIELDS: 'id,subject,from,toRecipients,ccRecipients,receivedDateTime,bodyPreview,hasAttachments,importance,isRead,conversationId',
  EMAIL_DETAIL_FIELDS: 'id,subject,from,toRecipients,ccRecipients,bccRecipients,receivedDateTime,bodyPreview,body,hasAttachments,importance,isRead,internetMessageHeaders',
  
  // Calendar constants
  CALENDAR_SELECT_FIELDS: 'id,subject,bodyPreview,start,end,location,organizer,attendees,isAllDay,isCancelled',
  
  // Pagination
  DEFAULT_PAGE_SIZE: 25,
  MAX_RESULT_COUNT: 500
};