/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import type { ConstructorDeclaration, SourceFile } from 'typescript';
import { isIdentifier } from 'typescript';

/**
 * get constructors info
 * @param node
 * @param sourceFile
 * @returns
 */
export function getConstructorDeclaration(
  constructorNode: ConstructorDeclaration,
  sourceFile: SourceFile
): Array<ConstructorEntity> {
  const constructors: Array<ConstructorEntity> = [];
  const fileText = sourceFile.getFullText();
  constructorNode.parameters.forEach(value => {
    const paramElement = value.name;
    let name = '';
    let typeName = '';
    let typeKind = -1;
    if (isIdentifier(paramElement)) {
      name = paramElement.escapedText.toString();
    } else {
      name = fileText.slice(paramElement.pos, paramElement.end).trim();
    }

    const paramTypeElement = value.type;
    if (paramTypeElement !== undefined) {
      typeName = fileText.slice(paramTypeElement.pos, paramTypeElement.end).trim();
      typeKind = paramTypeElement.kind;
    }

    constructors.push({
      name: name,
      typeName: typeName,
      typeKind: typeKind
    });
  });
  return constructors;
}

export interface ConstructorEntity {
  name: string;
  typeName: string;
  typeKind: number;
}