//> cflags: -Ofast

import "std/env.zc"

fn main() -> int {
    // ----
    // get: Retrieves the env-let as borrowed string (char *) (no alloc)
    // ---
    // @Example usage: On Linux (and some variants) PATH is already defined.
    // ---
    let path = Env::get("PATH");

    if (path.is_some()) {
        println "PATH is: {path.unwrap()}";
    } else {
        println "PATH is not set";
    }

    // ----
    // set:     Sets an env-let variable
    // get_dup: Retrieves the env-let as caller-owned String() (heap alloc)
    // ---
    // @Example usage: In your terminal type "export HELLO=world" or use Env::set()
    // ---
    let res = Env::set("HELLO", "world");
    //=> check res against EnvRes::OK()

    let hello = Env::get_dup("HELLO");

    if (hello.is_some()) {
        let hello_str = hello.unwrap();
        defer hello_str.free();

        println "HELLO is: {hello_str.c_str()}";
    } else {
        println "HELLO is not set";
    }

    // ----
    // unset: Unsets an existing env-let
    // ---
    Env::unset("HELLO");

    let hello_now2 = Env::get("HELLO");

    if (hello_now2.is_none()) {
        println "HELLO is now unset";
    }
}