use std::process::Command;
use std::{env, fs, path::PathBuf};

use protox::prost::Message;

fn main() -> Result<(), std::io::Error> {
    {
        let output = Command::new("git").args(["rev-parse", "HEAD"]).output();

        let sha = match output {
            Ok(sha) => String::from_utf8(sha.stdout).unwrap(),
            Err(_) => String::from("NO_GIT"),
        };

        println!("cargo:rustc-env=GIT_HASH={sha}");
    }

    {
        let proto_paths = [
            "proto/history.proto",
            "proto/search.proto",
            "proto/control.proto",
            "proto/semantic.proto",
        ];
        let proto_include_dirs = ["proto"];

        let file_descriptors = protox::compile(proto_paths, proto_include_dirs).unwrap();

        let file_descriptor_path = PathBuf::from(env::var_os("OUT_DIR").expect("OUT_DIR not set"))
            .join("file_descriptor_set.bin");
        fs::write(&file_descriptor_path, file_descriptors.encode_to_vec()).unwrap();

        tonic_prost_build::configure()
            .build_server(true)
            .file_descriptor_set_path(&file_descriptor_path)
            .skip_protoc_run()
            .compile_protos(&proto_paths, &proto_include_dirs)
    }
}