package utl

import (
	"regexp"
)

var (
	patternEmail string         = "^([.]?[a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+$"
	expEmail     *regexp.Regexp = regexp.MustCompile(patternEmail)

	patternPhone string         = "^(13[0-9]|14[57]|15[0-35-9]|18[0-9]|17[0-9]|16[7]|19[1])\\d{8}$"
	expPhone     *regexp.Regexp = regexp.MustCompile(patternPhone)

	patternAlpha string         = "^[a-zA-Z]+[a-zA-Z0-9]*$"
	expAlpha     *regexp.Regexp = regexp.MustCompile(patternAlpha)

	//patternSafePassword string			= ""
	//expSafePassword *regexp.Regexp = regexp.MustCompile(patternSafePassword)
)

func IsEmail(email string) bool {
	return expEmail.MatchString(email)
}

func IsPhone(phone string) bool {
	return expPhone.MatchString(phone)
}

func IsPhoneSimple(phone string) bool {
	if len(phone) != 11 {
		return false
	}
	return phone[0] == 49
}

/** begin with alpha, composed with alpha and num */
func IsAlpha(alpha string) bool {
	return expAlpha.MatchString(alpha)
}

func CheckPasswd(passwd string) (lower bool, num bool, upper bool, others bool) {
	lower, upper, num, others = false, false, false, false
	for _, ch := range passwd {
		if ch >= 0x41 && ch <= 0x5A { //A-Z
			upper = true
		} else if ch >= 0x61 && ch <= 0x7A { // a-z
			lower = true
		} else if ch >= 0x30 && ch <= 0x39 {
			num = true
		} else {
			others = true
		}
	}
	return
}