/**
 * Payment methods configuration
 * Centralized configuration for all available payment methods
 */

import type { PaymentMethod, Money } from '@/lib/saleor/payments/types';

/**
 * List of all available payment methods
 * Configure availability per channel, fees, and other settings
 */
export const paymentMethods: PaymentMethod[] = [
  {
    id: 'cod',
    name: 'Cash on Delivery',
    description: 'Pay when you receive your order',
    type: 'simple',
    fee: 0,
    available: true,
    availableInChannels: ['default-channel'], // Currently Serbia only
    icon: 'Banknote',
  },
  {
    id: 'card',
    name: 'Credit Card',
    description: 'Secure online payment',
    type: 'app',
    fee: 0,
    available: false, // Coming soon
    availableInChannels: ['default-channel'],
    icon: 'CreditCard',
  },
  {
    id: 'bank_transfer',
    name: 'Bank Transfer',
    description: 'Pay via bank transfer',
    type: 'simple',
    fee: 0,
    available: false, // Coming later
    availableInChannels: ['default-channel'],
    icon: 'Building2',
  },
];

/**
 * Get payment methods available for a specific channel
 */
export function getPaymentMethodsForChannel(channel: string): PaymentMethod[] {
  return paymentMethods.filter(
    (method) =>
      method.available && method.availableInChannels.includes(channel)
  );
}

/**
 * Get a specific payment method by ID
 */
export function getPaymentMethodById(id: string): PaymentMethod | undefined {
  return paymentMethods.find((method) => method.id === id);
}

/**
 * Check if a payment method is available for a channel
 */
export function isPaymentMethodAvailable(
  methodId: string,
  channel: string
): boolean {
  const method = getPaymentMethodById(methodId);
  if (!method) return false;
  return method.available && method.availableInChannels.includes(channel);
}

/**
 * Default payment method ID
 * Used when no payment method is explicitly selected
 */
export const DEFAULT_PAYMENT_METHOD = 'cod';

/**
 * Channel configuration
 * Maps channels to their supported payment methods
 */
export const channelPaymentConfig: Record<string, string[]> = {
  'default-channel': ['cod'], // Serbia - COD only for now
};

/**
 * Format payment method fee for display
 */
export function formatPaymentFee(fee: number, currency: string): string {
  if (fee === 0) return 'No additional fee';
  return new Intl.NumberFormat('en-US', {
    style: 'currency',
    currency: currency,
  }).format(fee);
}

/**
 * Generate PSP reference for COD transactions
 * Format: COD-{orderNumber}-{timestamp}
 */
export function generateCODReference(orderNumber: string): string {
  const timestamp = Date.now();
  return `COD-${orderNumber}-${timestamp}`;
}