import * as plugins from './plugins.js';
import * as path from 'path';
import type { IAccountData, TSKRType } from './skr.types.js';

// Extended interface for export with additional fields
export interface IAccountDataExport extends IAccountData {
  parentAccount?: string;
  defaultTaxCode?: string;
  activeFrom?: Date | string;
  activeTo?: Date | string;
}

export interface IAccountExportRow {
  account_code: string;
  name: string;
  type: string;
  class: number;
  parent?: string;
  skr_set: TSKRType;
  tax_code_default?: string;
  active_from?: string;
  active_to?: string;
  description?: string;
  is_active: boolean;
}

export class AccountsExporter {
  private exportPath: string;
  private accounts: IAccountExportRow[] = [];
  
  constructor(exportPath: string) {
    this.exportPath = exportPath;
  }

  /**
   * Adds an account to the export
   */
  public addAccount(account: IAccountDataExport): void {
    const exportRow: IAccountExportRow = {
      account_code: account.accountNumber,
      name: account.accountName,
      type: account.accountType,
      class: account.accountClass,
      parent: account.parentAccount,
      skr_set: account.skrType,
      tax_code_default: account.defaultTaxCode,
      active_from: account.activeFrom ? this.formatDate(account.activeFrom) : undefined,
      active_to: account.activeTo ? this.formatDate(account.activeTo) : undefined,
      description: account.description,
      is_active: account.isActive !== false
    };
    
    this.accounts.push(exportRow);
  }

  /**
   * Exports accounts to CSV format
   */
  public async exportToCSV(): Promise<void> {
    const csvPath = path.join(this.exportPath, 'data', 'accounting', 'accounts.csv');
    await plugins.smartfile.fs.ensureDir(path.dirname(csvPath));
    
    // Create CSV header
    const headers = [
      'account_code',
      'name',
      'type',
      'class',
      'parent',
      'skr_set',
      'tax_code_default',
      'active_from',
      'active_to',
      'description',
      'is_active'
    ];
    
    let csvContent = headers.join(',') + '\n';
    
    // Add account rows
    for (const account of this.accounts) {
      const row = [
        this.escapeCSV(account.account_code),
        this.escapeCSV(account.name),
        this.escapeCSV(account.type),
        account.class.toString(),
        this.escapeCSV(account.parent || ''),
        this.escapeCSV(account.skr_set),
        this.escapeCSV(account.tax_code_default || ''),
        this.escapeCSV(account.active_from || ''),
        this.escapeCSV(account.active_to || ''),
        this.escapeCSV(account.description || ''),
        account.is_active.toString()
      ];
      
      csvContent += row.join(',') + '\n';
    }
    
    await plugins.smartfile.memory.toFs(csvContent, csvPath);
  }

  /**
   * Exports accounts to JSON format (alternative)
   */
  public async exportToJSON(): Promise<void> {
    const jsonPath = path.join(this.exportPath, 'data', 'accounting', 'accounts.json');
    await plugins.smartfile.fs.ensureDir(path.dirname(jsonPath));
    
    const jsonData = {
      schema_version: '1.0',
      export_date: new Date().toISOString(),
      accounts: this.accounts
    };
    
    await plugins.smartfile.memory.toFs(
      JSON.stringify(jsonData, null, 2),
      jsonPath
    );
  }

  /**
   * Escapes CSV values
   */
  private escapeCSV(value: string): string {
    if (value.includes(',') || value.includes('"') || value.includes('\n')) {
      return `"${value.replace(/"/g, '""')}"`;
    }
    return value;
  }

  /**
   * Formats a date to ISO date string
   */
  private formatDate(date: Date | string): string {
    if (typeof date === 'string') {
      return date.split('T')[0];
    }
    return date.toISOString().split('T')[0];
  }

  /**
   * Gets the number of accounts
   */
  public getAccountCount(): number {
    return this.accounts.length;
  }

  /**
   * Clears the accounts list
   */
  public clear(): void {
    this.accounts = [];
  }
}