// buildDynamicImport
function buildDynamicImport(node, deferToThen, wrapWithPromise, builder) {
  const specifier = _core.types.isCallExpression(node) ? node.arguments[0] : node.source;
  if (_core.types.isStringLiteral(specifier) || _core.types.isTemplateLiteral(specifier) && specifier.quasis.length === 0) {
    if (deferToThen) {
      return _core.template.expression.ast`
        Promise.resolve().then(() => ${builder(specifier)})
      `;
    } else return builder(specifier);
  }
  const specifierToString = _core.types.isTemplateLiteral(specifier) ? _core.types.identifier("specifier") : _core.types.templateLiteral([_core.types.templateElement({
    raw: ""
  }), _core.types.templateElement({
    raw: ""
  })], [_core.types.identifier("specifier")]);
  if (deferToThen) {
    return _core.template.expression.ast`
      (specifier =>
        new Promise(r => r(${specifierToString}))
          .then(s => ${builder(_core.types.identifier("s"))})
      )(${specifier})
    `;
  } else if (wrapWithPromise) {
    return _core.template.expression.ast`
      (specifier =>
        new Promise(r => r(${builder(specifierToString)}))
      )(${specifier})
    `;
  } else {
    return _core.template.expression.ast`
      (specifier => ${builder(specifierToString)})(${specifier})
    `;
  }
}

// buildNamespaceInitStatements
function buildNamespaceInitStatements(metadata, sourceMetadata, constantReexports = false, wrapReference = Lazy.wrapReference) {
  var _wrapReference;
  const statements = [];
  const srcNamespaceId = _core.types.identifier(sourceMetadata.name);
  for (const localName of sourceMetadata.importsNamespace) {
    if (localName === sourceMetadata.name) continue;
    statements.push(_core.template.statement`var NAME = SOURCE;`({
      NAME: localName,
      SOURCE: _core.types.cloneNode(srcNamespaceId)
    }));
  }
  const srcNamespace = (_wrapReference = wrapReference(srcNamespaceId, sourceMetadata.wrap)) != null ? _wrapReference : srcNamespaceId;
  if (constantReexports) {
    statements.push(...buildReexportsFromMeta(metadata, sourceMetadata, true, wrapReference));
  }
  for (const exportName of sourceMetadata.reexportNamespace) {
    statements.push((!_core.types.isIdentifier(srcNamespace) ? _core.template.statement`
            Object.defineProperty(EXPORTS, "NAME", {
              enumerable: true,
              get: function() {
                return NAMESPACE;
              }
            });
          ` : _core.template.statement`EXPORTS.NAME = NAMESPACE;`)({
      EXPORTS: metadata.exportName,
      NAME: exportName,
      NAMESPACE: _core.types.cloneNode(srcNamespace)
    }));
  }
  if (sourceMetadata.reexportAll) {
    const statement = buildNamespaceReexport(metadata, _core.types.cloneNode(srcNamespace), constantReexports);
    statement.loc = sourceMetadata.reexportAll.loc;
    statements.push(statement);
  }
  return statements;
}

// ensureStatementsHoisted
function ensureStatementsHoisted(statements) {
  statements.forEach(header => {
    header._blockHoist = 3;
  });
}

// getModuleName
function getModuleName(rootOpts, pluginOpts) {
    var _pluginOpts$moduleId, _pluginOpts$moduleIds, _pluginOpts$getModule, _pluginOpts$moduleRoo;
    return originalGetModuleName(rootOpts, {
      moduleId: (_pluginOpts$moduleId = pluginOpts.moduleId) != null ? _pluginOpts$moduleId : rootOpts.moduleId,
      moduleIds: (_pluginOpts$moduleIds = pluginOpts.moduleIds) != null ? _pluginOpts$moduleIds : rootOpts.moduleIds,
      getModuleId: (_pluginOpts$getModule = pluginOpts.getModuleId) != null ? _pluginOpts$getModule : rootOpts.getModuleId,
      moduleRoot: (_pluginOpts$moduleRoo = pluginOpts.moduleRoot) != null ? _pluginOpts$moduleRoo : rootOpts.moduleRoot
    });
  }

// hasExports
function hasExports(metadata) {
  return metadata.hasExports;
}

// isModule
function isModule(path) {
  return path.node.sourceType === "module";
}

// isSideEffectImport
function isSideEffectImport(source) {
  return source.imports.size === 0 && source.importsNamespace.size === 0 && source.reexports.size === 0 && source.reexportNamespace.size === 0 && !source.reexportAll;
}

// rewriteModuleStatementsAndPrepareHeader
function rewriteModuleStatementsAndPrepareHeader(path, {
  exportName,
  strict,
  allowTopLevelThis,
  strictMode,
  noInterop,
  importInterop = noInterop ? "none" : "babel",
  lazy,
  getWrapperPayload = Lazy.toGetWrapperPayload(lazy != null ? lazy : false),
  wrapReference = Lazy.wrapReference,
  esNamespaceOnly,
  filename,
  constantReexports = arguments[1].loose,
  enumerableModuleMeta = arguments[1].loose,
  noIncompleteNsImportDetection
}) {
  (0, _normalizeAndLoadMetadata.validateImportInteropOption)(importInterop);
  _assert((0, _helperModuleImports.isModule)(path), "Cannot process module statements in a script");
  path.node.sourceType = "script";
  const meta = (0, _normalizeAndLoadMetadata.default)(path, exportName, {
    importInterop,
    initializeReexports: constantReexports,
    getWrapperPayload,
    esNamespaceOnly,
    filename
  });
  if (!allowTopLevelThis) {
    (0, _rewriteThis.default)(path);
  }
  (0, _rewriteLiveReferences.default)(path, meta, wrapReference);
  if (strictMode !== false) {
    const hasStrict = path.node.directives.some(directive => {
      return directive.value.value === "use strict";
    });
    if (!hasStrict) {
      path.unshiftContainer("directives", _core.types.directive(_core.types.directiveLiteral("use strict")));
    }
  }
  const headers = [];
  if ((0, _normalizeAndLoadMetadata.hasExports)(meta) && !strict) {
    headers.push(buildESModuleHeader(meta, enumerableModuleMeta));
  }
  const nameList = buildExportNameListDeclaration(path, meta);
  if (nameList) {
    meta.exportNameListName = nameList.name;
    headers.push(nameList.statement);
  }
  headers.push(...buildExportInitializationStatements(path, meta, wrapReference, constantReexports, noIncompleteNsImportDetection));
  return {
    meta,
    headers
  };
}

// rewriteThis
function rewriteThis(programPath) {
  if (!rewriteThisVisitor) {
    rewriteThisVisitor = _traverse.visitors.environmentVisitor({
      ThisExpression(path) {
        path.replaceWith(_core.types.unaryExpression("void", _core.types.numericLiteral(0), true));
      }
    });
    rewriteThisVisitor.noScope = true;
  }
  (0, _traverse.default)(programPath.node, rewriteThisVisitor);
}

// wrapInterop
function wrapInterop(programPath, expr, type) {
  if (type === "none") {
    return null;
  }
  if (type === "node-namespace") {
    return _core.types.callExpression(programPath.hub.addHelper("interopRequireWildcard"), [expr, _core.types.booleanLiteral(true)]);
  } else if (type === "node-default") {
    return null;
  }
  let helper;
  if (type === "default") {
    helper = "interopRequireDefault";
  } else if (type === "namespace") {
    helper = "interopRequireWildcard";
  } else {
    throw new Error(`Unknown interop: ${type}`);
  }
  return _core.types.callExpression(programPath.hub.addHelper(helper), [expr]);
}

// getDynamicImportSource
function getDynamicImportSource(node) {
    const [source] = node.arguments;
    return _core.types.isStringLiteral(source) || _core.types.isTemplateLiteral(source) ? source : _core.template.expression.ast`\`\${${source}}\``;
  }