package envconf

import ("strings"
        "unicode"
        "os")

const TypeNone = (1 << 1)
const TypeInt = (1 << 2)
const TypeDuration = (1 << 3)
const TypeString = (1 << 4)

type Config struct {
    env map[string]map[string]int

}

func getFirstRune(str string)(rune) {
    for _,v := range str {
        return v
    }
    return rune(0)
}

func NewConfig()(*Config) {
    config := new(Config)
    config.env = make(map[string]map[string]int)
    for _,v := range os.Environ() {
        splitted := strings.SplitN(v, "=", 2)
        if len(splitted) == 2 {
            key := strings.TrimSpace(strings.ToLower(splitted[0]))
            if unicode.IsLetter(getFirstRune(key)) {
                strval := splitted[1]
                val := make(map[string]int)
                val[strval] = TypeNone
                config.env[key] = val
            }
        }
    }
    return config
}