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

fn main() {
	built::write_built_file().expect("Failed to acquire build-time information");

	// Setting up git hooks in the project: rustfmt and so on.
	let git_hooks = format!(
		"git config core.hooksPath {}",
		PathBuf::from("./.hooks").to_str().unwrap()
	);

	if cfg!(target_os = "windows") {
		Command::new("cmd")
			.args(&["/C", &git_hooks])
			.output()
			.expect("failed to execute git config for hooks");
	} else {
		Command::new("sh")
			.args(&["-c", &git_hooks])
			.output()
			.expect("failed to execute git config for hooks");
	}

	let out_dir = env::var("OUT_DIR").unwrap();
	let tor_out_dir = format!("{}/tor", out_dir);
	let mut webtunnel_file = format!("{}/webtunnel", tor_out_dir);
	let exists = fs::exists(&webtunnel_file).unwrap();
	if !exists {
		// Create empty webtunnel file to allow build with include_bytes! macro.
		fs::create_dir(&tor_out_dir).unwrap_or_default();
		fs::File::create(&webtunnel_file).unwrap();
	}

	let target = env::var("TARGET").unwrap();
	let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
	if target_os == "ios" {
		return;
	}

	let is_android = target_os == "android";
	if is_android {
		// Set a path to Android Webtunnel binary.
		let arch = if target.contains("aarch64") {
			"arm64-v8a"
		} else if target.contains("arm") {
			"armeabi-v7a"
		} else {
			"x86_64"
		};
		let root = env::var("CARGO_MANIFEST_DIR").unwrap();
		webtunnel_file = format!(
			"{}/android/app/src/main/jniLibs/{}/libwebtunnel.so",
			root, arch
		);
	}

	// Build if Webtunnel binary is empty or not exists.
	let empty = match fs::File::open(&webtunnel_file) {
		Ok(file) => file.metadata().unwrap().len() == 0,
		Err(_) => true,
	};
	let build = !exists || empty;
	if build {
		// Setup GOOS env variable.
		let go_os = if target_os == "macos" {
			"darwin"
		} else {
			target_os.as_str()
		};
		// Setup GOARCH env variable.
		let go_arch = if target.contains("aarch64") {
			"arm64"
		} else if target.contains("arm") {
			"arm"
		} else {
			"amd64"
		};
		// Run Webtunnel Go build.
		let output = if env::consts::OS == "windows" {
			Command::new("./scripts/webtunnel.bat")
				.arg(go_os)
				.arg(go_arch)
				.arg(webtunnel_file)
				.output()
		} else {
			Command::new("bash")
				.arg("./scripts/webtunnel.sh")
				.arg(go_os)
				.arg(go_arch)
				.arg(webtunnel_file)
				.output()
		};
		if let Ok(out) = output {
			if out.status.code().is_none() || out.status.code().unwrap() != 0 {
				panic!("webtunnel go build failed:\n{:?}", out);
			}
		}
	}
}