// @apply https://vk.com/dev/errors

function camelize(str) { return str.replace(/\b(\w)/g, function (m) { return m.toUpperCase(); }); }

var rows = $$('.dev_param_row');
var errors = [];
var required_codes = [5, 6, 9, 10, 14, 15, 17, 113, 200, 201, 203, 300];
var replace_names = {
  UserAuthorizationFailed: 'AuthorizationFailed',
  TooManyRequestsPerSecond: 'TooManyRequests',
  InternalServerError: 'InternalError'
}

for (i = 0; i<rows.length; ++i) {
  var code = parseInt(rows[i].childNodes[0].innerHTML);
  if (required_codes.indexOf(code) == -1)
    continue;
  var description = rows[i].childNodes[1].textContent;
  description = description.split('\n');
  description = description[0].trim();
  var name = description
  name = name.replace(/\b(is|was|this|occurr?ed|passed)\b/gi, '');
  name = camelize(name).replace(/\W+/g, '');
  var match = name.match(/^AccessTo(\w+)Denied$/);
  if (match) {
    name = match[1] + 'AccessDenied';
  }
  if (name in replace_names)
    name = replace_names[name];
  errors.push({code: code, name: name, description: description})
}

console.log('\n' + JSON.stringify(errors, 0, 2));

var L = ["error = response['error']", "code = error['error_code']"];
var L1 = ['# Специфические ошибки.'];

for (var i = 0; i<errors.length; ++i) {
  var code = errors[i].code;
  var name = errors[i].name;
  var description = errors[i].description;
  L.push(
    (i ? 'el' : '') + 'if code == ' + code + ':',
    '    error = ' + name + '(error)'
  );
  L1.push(
    'class ' + name + '(ApiError):',
    '    """' + description + '"""',
    '    pass',
    ''
  );
}

L.push('else:', '    error = ApiError(error)', 'raise error');
L = L.concat(L1);
console.log(L.join('\n'));