/**
 * Currency conversion utilities
 * Database stores prices in EUR
 * Countries in CHF_COUNTRIES see CHF (converted from EUR)
 * All other countries see EUR
 */

// List of country codes that use CHF currency
// Add or remove country codes here to change which countries get CHF pricing
export const CHF_COUNTRIES = ['CH'] as const

// EUR to CHF exchange rate
// Using a fixed rate - in production, you might want to fetch this from an API
// Current approximate rate: 1 EUR ≈ 0.97 CHF (as of 2025)
// Note: This is approximate. For production, consider using a real-time exchange rate API
const EUR_TO_CHF_RATE = 0.97

/**
 * Convert EUR amount to CHF
 */
export function convertEurToChf(eurAmount: number): number {
  return eurAmount * EUR_TO_CHF_RATE
}

/**
 * Get the currency to use based on country code
 * Returns 'CHF' for countries in CHF_COUNTRIES, 'EUR' for all other countries
 */
export function getCurrencyForCountry(countryCode: string | null): 'CHF' | 'EUR' {
  return countryCode && CHF_COUNTRIES.includes(countryCode as any) ? 'CHF' : 'EUR'
}

/**
 * Convert price based on country
 * If country is in CHF_COUNTRIES, convert EUR to CHF
 * Otherwise, return EUR amount as-is
 */
export function convertPriceForCountry(priceInEur: number, countryCode: string | null): number {
  if (countryCode && CHF_COUNTRIES.includes(countryCode as any)) {
    return convertEurToChf(priceInEur)
  }
  return priceInEur
}

/**
 * Get currency symbol for display
 */
export function getCurrencySymbol(currency: 'CHF' | 'EUR'): string {
  return currency === 'CHF' ? 'CHF' : 'EUR'
}