//! `wai-room --version`: this program's own version and the toolchain it belongs to, in the form
//! `wai doctor` reads to tell whether it and a `wai` agree. The toolchain's version is
//! `wai/wai-rs/Cargo.toml`'s, as this tree states it.

use std::path::Path;
use std::process::Command;

fn run(args: &[&str]) -> (bool, String) {
    let o = Command::new(env!("CARGO_BIN_EXE_wai-room")).args(args).output().expect("wai-room runs");
    (o.status.success(), String::from_utf8(o.stdout).unwrap())
}

fn toolchain() -> String {
    let manifest = Path::new(env!("CARGO_MANIFEST_DIR")).join("../../../../wai/wai-rs/Cargo.toml");
    let text = std::fs::read_to_string(&manifest).unwrap_or_else(|e| panic!("{}: {e}", manifest.display()));
    text.lines().find_map(|l| l.strip_prefix("version = \"")?.strip_suffix('"')).expect("a version").to_string()
}

#[test]
fn it_names_itself_and_the_toolchain_it_belongs_to() {
    let (ok, text) = run(&["--version"]);
    assert!(ok, "{text}");
    assert_eq!(text.trim(), format!("wai-room {}, of the WAI toolchain {}", env!("CARGO_PKG_VERSION"), toolchain()));
    for args in [&["--version", "--json"][..], &["--json", "--version"]] {
        let (ok, text) = run(args);
        assert!(ok, "{text}");
        let v: serde_json::Value = serde_json::from_str(&text).unwrap_or_else(|e| panic!("{args:?}: {e}: {text}"));
        assert_eq!((v["wai"].as_str(), v["op"].as_str(), v["ok"].as_bool()), (Some("envelope/1"), Some("toolchain.show"), Some(true)), "{v}");
        assert_eq!(v["data"]["program"], "wai-room");
        assert_eq!(v["data"]["version"], env!("CARGO_PKG_VERSION"));
        assert_eq!(v["data"]["toolchain"].as_str(), Some(toolchain().as_str()));
    }
}