<?php

namespace YamlCF\ImportExport;

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

/**
 * Imports data object types and entries
 */
class DataObjectImporter {
  private $attachmentValidator;

  public function __construct($attachmentValidator) {
    $this->attachmentValidator = $attachmentValidator;
  }

  /**
   * Validate import data format
   *
   * @param array $data Import data
   * @return array ['valid' => bool, 'message' => string]
   */
  public function validate($data) {
    // TODO: Phase 14 - Implement validation
    if (!$data || !isset($data['plugin']) || $data['plugin'] !== 'yaml-custom-fields') {
      return ['valid' => false, 'message' => 'Invalid import file format'];
    }

    if (!isset($data['type']) || $data['type'] !== 'data_objects') {
      return ['valid' => false, 'message' => 'Invalid import file type. Expected data_objects export file.'];
    }

    if (!isset($data['types']) || !is_array($data['types'])) {
      return ['valid' => false, 'message' => 'No data object types found in import file'];
    }

    return ['valid' => true, 'message' => ''];
  }

  /**
   * Import data objects
   *
   * @param array $data Import data
   * @return array ['success' => bool, 'message' => string, 'types_imported' => int, 'entries_imported' => int, 'errors' => array]
   */
  public function import($data) {
    // TODO: Phase 14 - Implement import logic
    $validation = $this->validate($data);
    if (!$validation['valid']) {
      return [
        'success' => false,
        'message' => $validation['message'],
        'types_imported' => 0,
        'entries_imported' => 0,
        'errors' => []
      ];
    }

    return [
      'success' => true,
      'message' => 'Data objects imported successfully',
      'types_imported' => 0,
      'entries_imported' => 0,
      'errors' => []
    ];
  }
}
