import { toPath } from '../_internal/path'

/**
 * 根据点号或括号路径读取嵌套属性。
 * @function getPath
 * @memberof module:object
 * @param {Object} object 要读取的对象
 * @param {string|number|Array<string|number>} path 属性路径
 * @param {*} [defaultValue] 路径不存在或值为 undefined 时的默认值
 * @returns {*} 属性值或默认值
 * @throws {TypeError} path 类型不正确时抛出
 */
function getPath(object, path, defaultValue) {
  const parts = toPath(path)
  let current = object
  for (const part of parts) {
    if (current === null || current === undefined || !(part in Object(current))) return defaultValue
    current = current[part]
  }
  return current === undefined ? defaultValue : current
}

export default getPath