import crypto from 'crypto-js';
/**
 * ! 不支持计算 Set 或 Map
 * @param {*} val
 * @example
 * true if: 0, [], {}, null, '', undefined
 * false if: 'false', 'undefined'
 */
export function isEmpty(val) {
  // return val === undefined || val === null || val === "";
  return [Object, Array].includes((val || {}).constructor) && !Object.entries(val || {}).length;
}
/**
 * 数组排序
 */
export const sortBy = (key) => {
  return (a, b) => (a[key] > b[key] ? 1 : b[key] > a[key] ? -1 : 0);
};

/**
 * Object排序keys
 */
export const sortKeys = (obj) =>
  Object.keys(obj)
    .sort()
    .reduce((a, k2) => ({ ...a, [k2]: obj[k2] }), {});

/**
 * 数组排序, 给定排序数组
 * @param {array} items 需要排序的数组
 * @param {array} keyName 排序的key
 * @param {array} keyOrder 给定排序
 * @returns
 */
export const sortArrayByOrder = (items, keyName, keyOrder) => {
  return items.sort((a, b) => {
    return keyOrder.indexOf(a[keyName]) - keyOrder.indexOf(b[keyName]);
  });
};
/**
 * 合并Object, 递归地
 */
export function merge(...objects) {
  const isDeep = objects.some((obj) => obj !== null && typeof obj === 'object');

  const result = objects[0] || (isDeep ? {} : objects[0]);

  for (let i = 1; i < objects.length; i++) {
    const obj = objects[i];

    if (!obj) continue;

    Object.keys(obj).forEach((key) => {
      const val = obj[key];

      if (isDeep) {
        if (Array.isArray(val)) {
          result[key] = [].concat(Array.isArray(result[key]) ? result[key] : [result[key]], val);
        } else if (typeof val === 'object') {
          result[key] = merge(result[key], val);
        } else {
          result[key] = val;
        }
      } else {
        result[key] = typeof val === 'boolean' ? val : result[key];
      }
    });
  }

  return result;
}

/**
 * 数组分组
 * - 相当于 lodash 的 _.groupBy
 * @see https://www.lodashjs.com/docs/lodash.groupBy#_groupbycollection-iteratee_identity
 */
export function groupBy(array, callback) {
  return array.reduce((groups, item) => {
    const key = typeof callback === 'function' ? callback(item) : item[callback];

    if (!groups[key]) {
      groups[key] = [];
    }

    groups[key].push(item);
    return groups;
  }, {});
}

/**
 * 创建一个从 object 中选中的属性的对象。
 * @param {*} object
 * @param {array} keys
 */
export function pick(object, keys) {
  return keys.reduce((obj, key) => {
    if (object && Object.prototype.hasOwnProperty.call(object, key)) {
      obj[key] = object[key];
    }
    return obj;
  }, {});
}

/**
 * 返回对象的副本，经过筛选以省略指定的键。
 * @param {*} object
 * @param {string[]} keysToOmit
 * @returns
 */
export function omit(object, keysToOmit) {
  return Object.fromEntries(Object.entries(object).filter(([key]) => !keysToOmit.includes(key)));
}

/**
 * 深拷贝
 */
export function cloneDeep(value) {
  // return structuredClone(value);
  if (typeof value !== 'object' || value === null) {
    return value;
  }

  const result = Array.isArray(value) ? [] : {};

  for (const key in value) {
    if (Object.prototype.hasOwnProperty.call(value, key)) {
      result[key] = cloneDeep(value[key]);
    }
  }

  return result;
}

/**
 * 向零四舍五入, 固定精度设置
 */
function curriedFix(precision = 0) {
  return function (number) {
    // Shift number by precision places
    const shift = Math.pow(10, precision);
    const shiftedNumber = number * shift;

    // Round to nearest integer
    const roundedNumber = Math.round(shiftedNumber);

    // Shift back decimal place
    return roundedNumber / shift;
  };
}
/**
 * 向零四舍五入, 保留2位小数
 */
export const fixTo2Decimals = curriedFix(2);
/**
 * 向零四舍五入, 保留4位小数
 */
export const fixTo4Decimals = curriedFix(4);

export const fixTo1Decimals = curriedFix(1);
export const fixToInt = curriedFix(0);

/**
 * 映射
 * @example
 * const keyMap = {
    a: [{key: 'a1'}, {key: 'a2', transform: v => v * 2}],
    b: {key: 'b1'}
  };
  const result = objectMapper({a: 1, b: 3}, keyMap);
  // result = {a1: 1, a2: 2, b1: 3}
 *
 */
export function objectMapper(input, keyMap) {
  // Loop through array mapping
  if (Array.isArray(input)) {
    return input.map((obj) => objectMapper(obj, keyMap));
  }

  if (typeof input === 'object') {
    const mappedObj = {};

    Object.keys(input).forEach((key) => {
      // Keep original keys not in keyMap
      if (!keyMap[key]) {
        mappedObj[key] = input[key];
      }
      // Handle array of maps
      if (Array.isArray(keyMap[key])) {
        keyMap[key].forEach((map) => {
          let value = input[key];
          if (map.transform) value = map.transform(value);
          mappedObj[map.key] = value;
        });

        // Handle single map
      } else {
        const map = keyMap[key];
        if (map) {
          let value = input[key];
          if (map.transform) value = map.transform(value);
          mappedObj[map.key || key] = value;
        }
      }
    });

    return mappedObj;
  }

  return input;
}

/**
 * 创建一个对应于对象路径的值数组
 */
export function at(obj, path) {
  let result;
  if (Array.isArray(obj)) {
    // array case
    const indexes = path.split('.').map((i) => parseInt(i));
    result = [];
    for (let i = 0; i < indexes.length; i++) {
      result.push(obj[indexes[i]]);
    }
  } else {
    // object case
    const indexes = path.split('.').map((i) => i);
    result = [obj];
    for (let i = 0; i < indexes.length; i++) {
      result = [result[0][indexes[i]]];
    }
  }
  return result;
}
/**
 * 删除 null/undefined
 */
export function flush(collection) {
  let result, len, i;
  if (!collection) {
    return undefined;
  }
  if (Array.isArray(collection)) {
    result = [];
    len = collection.length;
    for (i = 0; i < len; i++) {
      const elem = collection[i];
      if (elem != null) {
        result.push(elem);
      }
    }
    return result;
  }
  if (typeof collection === 'object') {
    result = {};
    const keys = Object.keys(collection);
    len = keys.length;
    for (i = 0; i < len; i++) {
      const key = keys[i];
      const value = collection[key];
      if (value != null) {
        result[key] = value;
      }
    }
    return result;
  }
  return undefined;
}

/**
 * 千分位 格式化数字
 */
export const numberFormatter = (number) => {
  return new Intl.NumberFormat().format(number);
};

/**
 * @example
 *   const obj = { a: { b: 'c' } };
 *   const keyArr = ['a', 'b'];
 *   getNestedValue(obj, keyArr);  // Returns: 'c'
 */
export const getNestedValue = (obj, keyArr) => {
  return keyArr.reduce((acc, curr) => {
    return acc && Object.prototype.hasOwnProperty.call(acc, curr) ? acc[curr] : undefined;
    // return acc && acc[curr];
  }, obj);
};

/**
 * 计算笛卡尔积
 */
export const cartesianProductArray = (arr, sep = '_', index = 0, prefix = '') => {
  let result = [];
  if (index === arr.length) {
    return [prefix];
  }
  arr[index].forEach((item) => {
    result = result.concat(cartesianProductArray(arr, sep, index + 1, prefix ? `${prefix}${sep}${item}` : `${item}`));
  });
  return result;
};

export const stringToColour = (str) => {
  // Hash the username using SHA256
  const hash = crypto.SHA256(str);
  // Convert the hash to a hexadecimal string
  const hexString = hash.toString(crypto.enc.Hex);
  // Use the first 6 characters of the hex string as a color
  const color = '#' + hexString.substring(0, 6);
  return color;
};

export const olog = (text, ...args) => {
  console.log(
    `%c ${text} `,
    'background:#fb923c ; padding: 1px; border-radius: 3px;  color: #fff',...args
  );
};