use std::env;
use std::fs;
use std::path::{Path, PathBuf};

fn main() {
    let dir = PathBuf::from(env::var("OUT_DIR").unwrap()).join("../../../static");

    fs::create_dir_all(&dir).unwrap();

    let error = fs::remove_dir_all(dir.join("included"));
    println!("remove_dir_all => {error:?}");

    // Subdirectory for files included in dom macro invocations
    fs::create_dir_all(dir.join("included")).unwrap();

    // Invokes build script again if these changed:
    println!("cargo:rerun-if-changed={}", dir.to_string_lossy());

    println!("cargo:rerun-if-changed=src/driver_module/wasm_run.js");
    println!("cargo:rerun-if-changed=src/driver_module/wasm_run.js.map");

    bundle_file(
        "src/driver_module/wasm_run.js",
        include_str!("src/driver_module/wasm_run.js"),
        &dir,
        "wasm_run.js",
    );

    bundle_file(
        "src/driver_module/wasm_run.js.map",
        include_str!("src/driver_module/wasm_run.js.map"),
        &dir,
        "wasm_run.js.map",
    );
}

fn bundle_file(in_path: &str, content: &str, out_dir: &Path, file_name: &str) {
    // Invokes build script again if this file changed
    println!("cargo:rerun-if-changed={in_path}");

    let out_path = out_dir.join(file_name);

    fs::write(&out_path, content.as_bytes())
        .unwrap_or_else(|_| panic!("Couldn't write to {}!", out_path.to_string_lossy()));

    println!("Bundled {}", out_path.to_string_lossy());
}