fn main() {
    println!("cargo:rerun-if-changed=assets/icon.ico");
    println!("cargo:rerun-if-changed=build.rs");

    let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
    if target_os == "windows" {
        let out_dir = std::env::var("OUT_DIR").unwrap();
        let rc_path = format!("{}/sanctum.rc", out_dir);
        let res_path = format!("{}/sanctum.res", out_dir);

        let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
        let ico_path = format!("{}/assets/icon.ico", manifest_dir).replace('\\', "/");

        if std::path::Path::new(&ico_path).exists() {
            let rc_content = format!("1 ICON \"{}\"\n", ico_path);
            if std::fs::write(&rc_path, rc_content).is_ok() {
                let status = std::process::Command::new("windres")
                    .args(["-i", &rc_path, "-O", "coff", "-o", &res_path])
                    .status();
                if let Ok(s) = status {
                    if s.success() {
                        println!("cargo:rustc-link-arg={}", res_path);
                    }
                }
            }
        }
    }
}