extern crate bindgen;

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

#[allow(dead_code)]
fn make_debug(dir: &Path) {
    let status = Command::new("make").current_dir(dir).arg("debug").status();
    assert!(status.unwrap().success());
    println!("cargo:rustc-link-lib=static=wrend");
}

#[allow(dead_code)]
fn make_release(dir: &Path) {
    let status = Command::new("make").current_dir(dir).arg("static").status();
    assert!(status.unwrap().success());
    println!("cargo:rustc-link-lib=static=wren");
}



fn main() {
    // The bindgen::Builder is the main entry point
    // to bindgen, and lets you build up options for
    // the resulting bindings.
    let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header("wren/src/include/wren.h")
    // Finish the builder and generate the bindings.
        .whitelist_type("WrenConfiguration")
        .whitelist_type("WrenVM")
        .whitelist_type("WrenHandle")
        .whitelist_function("wrenInitConfiguration")
        .whitelist_function("wrenNewVM")
        .whitelist_function("wrenInterpret")
        .whitelist_function("wrenFreeVM")
        .whitelist_function("wrenMakeCallHandle")
        .whitelist_function("wrenEnsureSlots")
        .whitelist_function("wrenGetVariable")
        .whitelist_function("wrenSetSlotHandle")
        .whitelist_function("wrenReleaseHandle")
        .whitelist_function("wrenCall")
        .whitelist_function("wrenSetSlotString")
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

    // Write the bindings to the $OUT_DIR/bindings.rs file.
    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");

    let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
    let manifest_path = Path::new(&manifest_dir);
    let wren_make_dir = manifest_path.join("wren");
    let wren_lib_dir = manifest_path.join("wren/lib");

    #[cfg(debug_assertions)]
    make_debug(&wren_make_dir);
    #[cfg(not(debug_assertions))]
    make_release(&wren_make_dir);

    println!("cargo:rustc-link-search=native={}", wren_lib_dir.display());
}