module os

$if js_node {
    #global.$ENV = $process.env
} $else {
    #const global = $global;
    #global.$ENV = {}
}

// setenv sets the value of an environment variable with `name` to `value`.
pub fn setenv(key string, val string, overwrite bool) {
    #if ($ENV[key] && !(overwrite.valueOf())) return;
    #$ENV[key] = val + '';
}

// `getenv` returns the value of the environment variable named by the key.
pub fn getenv(key string) string {
    mut res := ''
    #if ($ENV[key]) res = new string($ENV[key])

    return res
}

// `getenv_opt` returns the value of a given environment variable.
// Returns `none` if the environment variable does not exist.
pub fn getenv_opt(key string) ?string {
    #if (!$ENV[key]) return none__;

    mut res := ''
    #if ($ENV[key]) res = new string($ENV[key]);

    return res
}

// unsetenv clears an environment variable with `name`.
pub fn unsetenv(name string) int {
    #$ENV[name] = ""

    return 1
}

pub fn environ() map[string]string {
    mut res := map[string]string{}
    #for (const key in $ENV) {
    #res.map.set(key,$ENV[key])
    #}

    return res
}