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extern crate proc_macro;

use proc_macro::TokenStream;
use quote::{quote, ToTokens};
use std::{env, path::Path};

// CARGO_INSTALL_ROOT
fn get_main_rs_path() -> &'static str {
    if env::var("CARGO_PUBLISH").is_err() {
        concat!(
            env!("CARGO_MANIFEST_DIR"),
            "/../single-binary-producer/src/main.rs"
        )
    } else {
        concat!(
            env!("CARGO_MANIFEST_DIR"),
            "../../../../single-binary-producer/src/main.rs"
        )
    }
}
fn get_cargo_toml_path() -> &'static str {
    if env::var("CARGO_PUBLISH").is_err() {
        concat!(
            env!("CARGO_MANIFEST_DIR"),
            "/../single-binary-producer/Cargo.toml"
        )
    } else {
        concat!(
            env!("CARGO_MANIFEST_DIR"),
            "../../../../single-binary-producer/Cargo.toml"
        )
    }
}
fn quote(dir: impl AsRef<Path> + ToTokens) -> TokenStream {
    quote! {
        std::include_str!(#dir)
    }
    .into()
}

#[proc_macro]
pub fn get_sbp_main_rs(_input: TokenStream) -> TokenStream {
    let dir = get_main_rs_path();

    quote(dir)
}

#[proc_macro]
pub fn get_sbp_cargo_toml(_input: TokenStream) -> TokenStream {
    let dir = get_cargo_toml_path();

    quote(dir)
}