import * as type from './type';
/**
 * target与sources合并
 * @param target
 * @param sources
 * @returns 合并后的对象
 */
export function merge(target: object, ...sources: any[]) {
  if (!sources?.length) return target;

  const mergeOne = (target, source) => {
    if (!source) return target;

    const phantomTarget = cloneDeep(target);
    Object.entries(source).forEach(([key, value]) => {
      if (Array.isArray(value)) {
        if (!phantomTarget[key] || !Array.isArray(phantomTarget[key])) {
          phantomTarget[key] = value;
        } else {
          phantomTarget[key] = Array.from(new Set([...value]));
        }
      } else if (type.isObject(value)) {
        phantomTarget[key] = mergeOne(phantomTarget[key] ? phantomTarget[key] : phantomTarget[key] = {}, value);
      } else {
        phantomTarget[key] = value;
      }
    });

    return phantomTarget;
  };

  const source = sources.reduce((memo, current) => mergeOne(memo, current), {});

  return mergeOne(target, source);
}

export function cloneDeep(data) {
  let result;

  if (Array.isArray(data)) {
    result = [];
  } else if (type.isObject(data)) {
    result = {};
  } else {
    return data;
  }

  if (Array.isArray(data)) {
    data.forEach((item) => {
      result.push(cloneDeep(item));
    });
    return result;
  }
  if (type.isObject(data)) {
    Object.entries(data).forEach(([key, value]) => {
      result[key] = cloneDeep(value);
    });
    return result;
  }
}