use dbus_codegen::{ConnectionType, GenOpts, ServerAccess};
use std::env;
use std::error::Error;
use std::fs;
use std::path::Path;

const INTROSPECTION_PATH: &str = "dbus/introspection.xml";

fn main() -> Result<(), Box<dyn Error>> {
    let introspection = fs::read_to_string(INTROSPECTION_PATH)?;
    let out_dir = env::var_os("OUT_DIR").ok_or("OUT_DIR is not set")?;

    let gen_path = Path::new(&out_dir).join("introspection.rs");
    let gen_opts = GenOpts {
        methodtype: None,
        crossroads: true,
        skipprefix: None,
        serveraccess: ServerAccess::RefClosure,
        genericvariant: false,
        connectiontype: ConnectionType::Blocking,
        propnewtype: false,
        interfaces: None,
        ..Default::default()
    };

    let code = dbus_codegen::generate(&introspection, &gen_opts)?;
    fs::write(&gen_path, code)?;

    println!("D-Bus code generated at {gen_path:?}");
    println!("cargo:rerun-if-changed={INTROSPECTION_PATH}");
    println!("cargo:rerun-if-changed=build.rs");
    Ok(())
}