/* LICENSE BEGIN
    This file is part of the SixtyFPS Project -- https://sixtyfps.io
    Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
    Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>

    SPDX-License-Identifier: GPL-3.0-only
    This file is also available under commercial licensing terms.
    Please contact info@sixtyfps.io for more information.
LICENSE END */
use std::error::Error;
use std::{fs::File, io::Write, path::PathBuf};

pub fn test(testcase: &test_driver_lib::TestCase) -> Result<(), Box<dyn Error>> {
    let mut sixtyfpspath = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    sixtyfpspath.pop(); // driver
    sixtyfpspath.pop(); // tests
    sixtyfpspath.push("api/sixtyfps-node/lib/index.js");

    let dir = tempfile::tempdir()?;

    let mut main_js = File::create(dir.path().join("main.js"))?;
    write!(
        main_js,
        r#"
                const assert = require('assert').strict;
                let sixtyfpslib = require(String.raw`{sixtyfpspath}`);
                let sixtyfps = require(String.raw`{path}`);
        "#,
        sixtyfpspath = sixtyfpspath.to_string_lossy(),
        path = testcase.absolute_path.to_string_lossy()
    )?;
    let source = std::fs::read_to_string(&testcase.absolute_path)?;
    let include_paths = test_driver_lib::extract_include_paths(&source);
    for x in test_driver_lib::extract_test_functions(&source).filter(|x| x.language_id == "js") {
        write!(main_js, "{{\n    {}\n}}\n", x.source.replace("\n", "\n    "))?;
    }

    let output = std::process::Command::new("node")
        .arg(dir.path().join("main.js"))
        .current_dir(dir.path())
        .env("SIXTYFPS_NODE_NATIVE_LIB", std::env::var_os("SIXTYFPS_NODE_NATIVE_LIB").unwrap())
        .env("SIXTYFPS_INCLUDE_PATH", std::env::join_paths(include_paths).unwrap())
        .stdout(std::process::Stdio::piped())
        .stderr(std::process::Stdio::piped())
        .output()
        .map_err(|err| format!("Could not launch npm start: {}", err))?;

    if !output.status.success() {
        print!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
        print!("{}", String::from_utf8_lossy(output.stderr.as_ref()));
        return Err(String::from_utf8_lossy(output.stderr.as_ref()).to_owned().into());
    }

    Ok(())
}