use std::path::Path;

const KEYS: [&str; 3] = ["GRID_USER", "GRID_PASSWORD", "GRID_LOGIN_URL"];

fn dotenv_has(path: &Path, key: &str) -> bool {
    std::fs::read_to_string(path).is_ok_and(|contents| {
        contents.lines().any(|line| {
            let line = line.trim().strip_prefix("export ").unwrap_or(line.trim());
            line.split_once('=').is_some_and(|(name, value)| {
                name.trim() == key && !value.trim().trim_matches(['\'', '"']).is_empty()
            })
        })
    })
}

fn main() {
    let dotenv = Path::new(&std::env::var("CARGO_MANIFEST_DIR").expect("manifest directory"))
        .join("../..")
        .join(".env");
    println!("cargo:rustc-check-cfg=cfg(live_grid_credentials)");
    println!("cargo:rerun-if-changed={}", dotenv.display());
    for key in KEYS {
        println!("cargo:rerun-if-env-changed={key}");
    }
    if KEYS.iter().all(|key| {
        std::env::var(key).is_ok_and(|value| !value.trim().is_empty()) || dotenv_has(&dotenv, key)
    }) {
        println!("cargo:rustc-cfg=live_grid_credentials");
    }
}
