import '../network/api_client.dart';

/// Asset utility helpers to map ISIN codes, symbols, and company names to logos and details.
class AssetUtils {
  static final Map<String, String> _isinToNameMap = {
    'US0378331005': 'Apple Inc.',
    'US5949181045': 'Microsoft Corp.',
    'US0231351067': 'Amazon.com Inc.',
    'US67066G1040': 'NVIDIA Corp.',
    'US88160R1014': 'Tesla Inc.',
    'US02079K3059': 'Alphabet Inc.',
    'US30303M1027': 'Meta Platforms',
    'DE0007164600': 'SAP SE',
    'DE0007236101': 'Siemens AG',
    'DE0008469008': 'Allianz SE',
    'FR0004125920': 'Amundi',
  };

  static final Map<String, String> _nameToIsinMap = {
    'APPLE INC.': 'US0378331005',
    'APPLE': 'US0378331005',
    'MICROSOFT CORP.': 'US5949181045',
    'MICROSOFT': 'US5949181045',
    'AMAZON.COM INC.': 'US0231351067',
    'AMAZON': 'US0231351067',
    'NVIDIA CORP.': 'US67066G1040',
    'NVIDIA': 'US67066G1040',
    'TESLA INC.': 'US88160R1014',
    'TESLA': 'US88160R1014',
    'ALPHABET INC.': 'US02079K3059',
    'ALPHABET': 'US02079K3059',
    'META PLATFORMS': 'US30303M1027',
    'META': 'US30303M1027',
    'SAP SE': 'DE0007164600',
    'SAP': 'DE0007164600',
    'SIEMENS AG': 'DE0007236101',
    'SIEMENS': 'DE0007236101',
    'ALLIANZ SE': 'DE0008469008',
    'ALLIANZ': 'DE0008469008',
    'AMUNDI': 'FR0004125920',
  };

  static final Map<String, String> _imageMap = {};

  /// Registers an ISIN, Name, and optional Logo Image URL.
  static void registerAsset(String isin, String name, [String? imageUrl]) {
    final cleanIsin = isin.trim().toUpperCase();
    final cleanName = name.trim();
    if (cleanIsin.isNotEmpty && cleanName.isNotEmpty) {
      _isinToNameMap[cleanIsin] = cleanName;
      _nameToIsinMap[cleanName.toUpperCase()] = cleanIsin;
    }
    if (imageUrl != null && imageUrl.isNotEmpty) {
      final resolved = resolveUrl(imageUrl);
      if (cleanIsin.isNotEmpty) _imageMap[cleanIsin] = resolved;
      if (cleanName.isNotEmpty) _imageMap[cleanName.toUpperCase()] = resolved;
    }
  }

  /// Resolves relative logo URLs (/api/logo/...) to complete backend endpoints.
  static String resolveUrl(String url) {
    if (url.startsWith('http://') || url.startsWith('https://')) {
      return url;
    }
    if (url.startsWith('/')) {
      return '${ApiClient.baseUrl}$url';
    }
    return '${ApiClient.baseUrl}/$url';
  }

  /// Resolves an ISIN or symbol to readable asset name.
  static String getAssetName(String isinOrSymbol) {
    final key = isinOrSymbol.trim().toUpperCase();
    if (_isinToNameMap.containsKey(key)) {
      return _isinToNameMap[key]!;
    }
    return isinOrSymbol;
  }

  /// Resolves an asset name or symbol to ISIN.
  static String? getIsin(String nameOrSymbol) {
    final key = nameOrSymbol.trim().toUpperCase();
    if (_isinToNameMap.containsKey(key)) return key;
    return _nameToIsinMap[key];
  }

  /// Returns official local backend logo URL for given symbol/name/ISIN.
  static String? getLogoUrl(String symbolOrName) {
    final key = symbolOrName.trim().toUpperCase();
    if (_imageMap.containsKey(key)) return resolveUrl(_imageMap[key]!);

    final isin = getIsin(key) ?? (key.length == 12 ? key : null);
    if (isin != null && isin.length == 12) {
      return '${ApiClient.baseUrl}/api/logo/$isin';
    }
    return null;
  }
}