import isEmail from "validator/lib/isEmail.js"
import isBase64 from "validator/lib/isBase64.js"
import isUUID from "validator/lib/isUUID.js"
import isDataURI from "validator/lib/isDataURI.js"
import isURL from "validator/lib/isURL.js"
import isIP from "validator/lib/isIP.js"

export type IDtoIsFunction = (val: any) => { isOk: boolean; msg?: string }

const dtoIs = {
    isEmail: (val: any) => {
        return isEmail(val) ? { isOk: true } : { isOk: false, msg: "is not email." }
    },
    isBase64: (val: any) => {
        return isBase64(val) ? { isOk: true } : { isOk: false, msg: "is not base64." }
    },
    isUUID: (val: any) => {
        return isUUID(val) ? { isOk: true } : { isOk: false, msg: "is not UUID." }
    },
    isDataURI: (val: any) => {
        return isDataURI(val) ? { isOk: true } : { isOk: false, msg: "is not DataURI." }
    },
    isURL: (val: any) => {
        // 先用标准规则验证，再用允许 localhost 的规则验证
        const isValid = isURL(val) || isURL(val, { require_tld: false, host_whitelist: ["localhost", "127.0.0.1"] })
        return isValid ? { isOk: true } : { isOk: false, msg: "is not URL." }
    },
    isIP: (val: any) => {
        return isIP(val) ? { isOk: true } : { isOk: false, msg: "is not IP." }
    },

    /**
     * 是否在指定的值列表中
     *
     * 相当于白名单，只允许列表中的值通过验证
     *
     * @example
     * import {dto, dtoIs } from "fzz"
     * const {in} = dtoIs
     *
     * class DtoA {
     *  name : dto.String({is:in(['alice', 'bob'])})
     * }
     *
     */
    in: (values: any[]) => {
        return (val: any) => {
            return values.includes(val) ? { isOk: true } : { isOk: false, msg: `not in [${values.join(", ")}].` }
        }
    },

    /**
     * 是否不在指定的值列表中
     * 相当于黑名单，不允许列表中的值通过验证
     *
     * @example
     * import {dto, dtoIs } from "fzz"
     * const {notIn} = dtoIs
     *
     * class DtoA {
     *  name : dto.String({is:notIn(['admin', 'root'])})
     * }
     */
    notIn: (values: any[]) => {
        return (val: any) => {
            return !values.includes(val) ? { isOk: true } : { isOk: false, msg: `in blacklist [${values.join(", ")}].` }
        }
    },
}

export { dtoIs }