package sqimple

import "regexp"

var whereRegexp = regexp.MustCompile("^((and|or) )?(.+) (=|!=|>|>=|<|<=) (.+)?$")

type Where string

func (w Where) IsValid() bool {
	return whereRegexp.MatchString(string(w))
}

func (w Where) Parse() (glue, column, operator string, value any, ok bool) {
	if whereRegexp.MatchString(string(w)) {
		ok = true

		result := whereRegexp.FindAllStringSubmatch(string(w), -1)
		for _, r := range result {
			glue, column, operator, value = r[2], r[3], r[4], r[5]

			if value == "?" {
				value = nil
			}
		}
	}

	return
}

func (w Where) String() string {
	return string(w)
}