// Mailgun Configuration
// This file handles Mailgun credentials and configuration

export interface MailgunConfig {
  apiKey: string;
  domain: string;
  baseUrl: string;
  fromName: string;
  fromEmail: string;
}

// Default configuration for development
const defaultConfig: MailgunConfig = {
  apiKey: 'demo-key',
  domain: 'demo.mailgun.org',
  baseUrl: 'https://api.mailgun.net/v3',
  fromName: 'Medication Reminder',
  fromEmail: 'noreply@demo.mailgun.org',
};

// Load configuration from environment variables or use defaults
export const getMailgunConfig = (): MailgunConfig => {
  // Check if running in browser environment
  const isClient = typeof window !== 'undefined';

  if (isClient) {
    // In browser, use Vite environment variables
    // Note: Vite environment variables are available at build time
    const env = (import.meta as any).env || {};
    return {
      apiKey: env.VITE_MAILGUN_API_KEY || defaultConfig.apiKey,
      domain: env.VITE_MAILGUN_DOMAIN || defaultConfig.domain,
      baseUrl: env.VITE_MAILGUN_BASE_URL || defaultConfig.baseUrl,
      fromName: env.VITE_MAILGUN_FROM_NAME || defaultConfig.fromName,
      fromEmail: env.VITE_MAILGUN_FROM_EMAIL || defaultConfig.fromEmail,
    };
  } else {
    // In Node.js environment (if needed for SSR)
    return {
      apiKey: process.env.MAILGUN_API_KEY || defaultConfig.apiKey,
      domain: process.env.MAILGUN_DOMAIN || defaultConfig.domain,
      baseUrl: process.env.MAILGUN_BASE_URL || defaultConfig.baseUrl,
      fromName: process.env.MAILGUN_FROM_NAME || defaultConfig.fromName,
      fromEmail: process.env.MAILGUN_FROM_EMAIL || defaultConfig.fromEmail,
    };
  }
};

// Check if Mailgun is properly configured (not using demo values)
export const isMailgunConfigured = (): boolean => {
  const config = getMailgunConfig();
  return (
    config.apiKey !== 'demo-key' &&
    config.domain !== 'demo.mailgun.org' &&
    config.apiKey.length > 0
  );
};

// Development mode check
export const isDevelopmentMode = (): boolean => {
  return !isMailgunConfigured();
};