/**
 * EN16931-compliant metadata interface for EInvoice
 * Contains all additional fields required for full standards compliance
 */

import type { business } from '@tsclass/tsclass';
import type { InvoiceFormat } from './common.js';

/**
 * Extended metadata for EN16931 compliance
 */
export interface IEInvoiceMetadata {
  // Format identification
  format?: InvoiceFormat;
  version?: string;
  profile?: string;
  customizationId?: string;
  
  // EN16931 Business Terms
  vatAccountingCurrency?: string;                // BT-6
  documentTypeCode?: string;                     // BT-3
  paymentMeansCode?: string;                     // BT-81
  paidAmount?: number;                          // BT-113
  amountDue?: number;                           // BT-115
  
  // Tax identifiers
  sellerTaxId?: string;                         // BT-31
  buyerTaxId?: string;                          // BT-48
  buyerReference?: string;                      // BT-10
  profileId?: string;                           // BT-23
  paymentTerms?: string;                        // BT-20
  
  // Delivery information (BG-13)
  deliveryAddress?: {
    streetName?: string;
    houseNumber?: string;
    city?: string;
    postalCode?: string;
    countryCode?: string;                      // BT-80
    countrySubdivision?: string;
  };
  
  // Payment information (BG-16)
  paymentAccount?: {
    iban?: string;                             // BT-84
    accountName?: string;                      // BT-85
    bankId?: string;                          // BT-86
  };
  
  // Allowances and charges (BG-20, BG-21)
  allowances?: Array<{
    amount: number;                            // BT-92
    baseAmount?: number;                      // BT-93
    percentage?: number;                      // BT-94
    vatCategoryCode?: string;                 // BT-95
    vatRate?: number;                         // BT-96
    reason?: string;                           // BT-97
    reasonCode?: string;                       // BT-98
  }>;
  
  charges?: Array<{
    amount: number;                            // BT-99
    baseAmount?: number;                      // BT-100
    percentage?: number;                       // BT-101
    vatCategoryCode?: string;                 // BT-102
    vatRate?: number;                         // BT-103
    reason?: string;                           // BT-104
    reasonCode?: string;                       // BT-105
  }>;
  
  // Extensions for specific standards
  extensions?: Record<string, any>;
}

/**
 * Extended item metadata for EN16931 compliance
 */
export interface IItemMetadata {
  vatCategoryCode?: string;                     // BT-151
  priceBaseQuantity?: number;                  // BT-149
  exemptionReason?: string;                    // BT-120 (for exempt categories)
  originCountryCode?: string;                  // BT-159
  commodityCode?: string;                      // BT-158
  
  // Item attributes (BG-32)
  attributes?: Array<{
    name: string;                              // BT-160
    value: string;                             // BT-161
  }>;
}

/**
 * Extended accounting document item with metadata
 */
export interface IExtendedAccountingDocItem {
  position: number;
  name: string;
  articleNumber?: string;
  unitType: string;
  unitQuantity: number;
  unitNetPrice: number;
  vatPercentage: number;
  metadata?: IItemMetadata;
}