import {
  Validator,
  Args,
  isString,
  isArray,
  isNumber,
  isSymbol,
  isBoolean,
} from "../mod.ts";

export const isRequired: Validator = {
  type: "isRequired",
  check: (value: any) => {
    if (value === null || value === undefined) {
      return {};
    }
  },
  message: (value: any, args?: Args) => {
    return `This value is required.`;
  },
};

export const isDefined: Validator = {
  type: "isDefined",
  check: (value: any) => {
    if (value === undefined) {
      return {};
    }
  },
  message: (value: any, args?: Args) => {
    return `This value has to be defined.`;
  },
};

export const isNotEmpty: Validator = {
  type: "isNotEmpty",
  check: async (value: any) => {
    if (value === null || value === undefined) {
      return {};
    }
    if ((await isString.check(value)) === undefined) {
      if (/^\s*$/.test(value)) {
        return {};
      }
      return;
    }
    if ((await isNumber.check(value)) === undefined || Number.isNaN(value)) {
      return;
    }
    if (await isSymbol.check(value) === undefined) {
      return;
    }
    if (await isBoolean.check(value) === undefined) {
      return;
    }
    if ((await isArray.check(value)) === undefined) {
      if (value.length > 0) {
        return;
      }
      return {};
    }
    for (const key in value) {
      return;
    }
    return {};
  },
  message: (value: any, args?: Args) => {
    return `This value has to be non-empty.`;
  },
};