/**
 * 常量模块
 *
 * @author haroldhu
 */

/**
 * 错误码
 */
enum ErrorCode {
  DocIDError = "文档ID不合法",
  CollNameError = "集合名称不合法",
  OpStrError = "操作符不合法",
  DirectionError = "排序字符不合法",
  IntergerError = "must be integer"
}

/**
 * 字段类型
 */
const FieldType = {
  String: "String",
  Number: "Number",
  Object: "Object",
  Array: "Array",
  Boolean: "Boolean",
  Null: "Null",
  GeoPoint: "GeoPoint",
  Timestamp: "Date",
  Command: "Command",
  ServerDate: "ServerDate"
};

/**
 * 排序方向
 */
type OrderByDirection = "desc" | "asc";

/**
 * 排序方向列表
 */
const OrderDirectionList = ["desc", "asc"];

/**
 * 查询条件操作符
 */
type WhereFilterOp = "<" | "<=" | "==" | ">=" | ">";

/**
 * 操作符列表
 */
const WhereFilterOpList = ["<", "<=", "==", ">=", ">"];

/**
 * 操作符别名
 */
enum Opeartor {
  lt = "<",
  gt = ">",
  lte = "<=",
  gte = ">=",
  eq = "=="
}

/**
 * 操作符映射
 * SDK => MongoDB
 */
const OperatorMap = {
  [Opeartor.eq]: "$eq",
  [Opeartor.lt]: "$lt",
  [Opeartor.lte]: "$lte",
  [Opeartor.gt]: "$gt",
  [Opeartor.gte]: "$gte"
};

const UpdateOperatorList = [
  "$set",
  "$inc",
  "$mul",
  "$unset",
  "$push",
  "$pop",
  "$unshift",
  "$shift",
  "$currentDate",
  "$each",
  "$position"
];

export {
  ErrorCode,
  FieldType,
  WhereFilterOp,
  WhereFilterOpList,
  Opeartor,
  OperatorMap,
  OrderByDirection,
  OrderDirectionList,
  UpdateOperatorList
};