fn main() {

    let output = Command::new("git")

        .args(["rev-parse", "HEAD"])

        .output()

        .expect("Can't get git revision");

    let git_hash = String::from_utf8(output.stdout)

        .expect("Can't parse git revision")

        .trim()

        .to_owned();

    println!("cargo:rustc-env=GIT_HASH={git_hash}");

    let build_date = chrono::Utc::now().to_rfc3339();

    println!("cargo:rustc-env=BUILD_DATE={build_date}");

    println!("cargo:rerun-if-changed=frontend/src");

    build_wasm_frontend();

    println!("cargo:rerun-if-changed=../doc");

    build_org_docs();

}

fn export_org_file(org_path: &Path, out_dir: &Path, eval_babel: bool) {

    let html_name = org_path.file_stem().unwrap().to_str().unwrap().to_owned() + ".html";

    let html_in_place = org_path.with_extension("html");

    let html_dest = out_dir.join(&html_name);

    if html_dest.exists() {

        let org_modified = fs::metadata(org_path)

            .and_then(|m| m.modified())

            .unwrap_or(std::time::SystemTime::UNIX_EPOCH);

        let html_modified = fs::metadata(&html_dest)

            .and_then(|m| m.modified())

            .unwrap_or(std::time::SystemTime::UNIX_EPOCH);

        if html_modified >= org_modified {

            return;

    }

    let mut args: Vec<&str> = vec!["-q", "--batch"];

    let org_str = org_path.to_str().unwrap();

    args.push(org_str);

    args.extend_from_slice(&["-l", "ox-html"]);

    if eval_babel {

        args.extend_from_slice(&[

            "--eval",

            "(progn (require 'ob-emacs-lisp) (setq org-confirm-babel-evaluate nil))",

        ]);

    }

    args.extend_from_slice(&["--eval", "(org-html-export-to-html)", "-f", "kill-emacs"]);

    let status = Command::new("emacs").args(&args).status();

    match status {

        Ok(s) if s.success() => {

            if html_in_place.exists() {

                fs::create_dir_all(out_dir).expect("Failed to create doc output dir");

                fs::rename(&html_in_place, &html_dest).expect("Failed to move HTML");

            }

        Ok(s) => eprintln!(

            s.code().unwrap_or(-1)

}

fn build_org_docs() {

    let project_root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())

        .parent()

        .unwrap()

        .to_path_buf();

    let doc_dir = project_root.join("doc");

    let static_doc = PathBuf::from("static/doc");

    export_org_file(&doc_dir.join("disdoc.org"), &static_doc, false);

    if let Ok(entries) = fs::read_dir(doc_dir.join("scripts")) {

        for entry in entries.flatten() {

            let path = entry.path();

            if path.extension().is_some_and(|e| e == "org") {

                export_org_file(&path, &static_doc.join("scripts"), false);

            }

    if let Ok(entries) = fs::read_dir(doc_dir.join("nomiscript")) {

        for entry in entries.flatten() {

            let path = entry.path();

            if path.extension().is_some_and(|e| e == "org") {

                export_org_file(&path, &static_doc.join("nomiscript"), true);

            }

}

fn build_wasm_frontend() {

    let profile = env::var("PROFILE").unwrap_or_else(|_| "debug".to_string());

    let project_root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())

        .parent()

        .unwrap()

        .to_path_buf();

    let wasm_target_dir = project_root.join("target-wasm");

    let wasm_file = wasm_target_dir

        .join("wasm32-unknown-unknown")

        .join(&profile)

        .join("nomisync_frontend.wasm");

    let cargo = env::var("CARGO").unwrap_or_else(|_| "cargo".to_string());

    let mut cmd = Command::new(&cargo);

    cmd.args([

        "build",

        "-p",

        "nomisync-frontend",

        "--target",

        "wasm32-unknown-unknown",

        "--features",

        "auto-init",

        "-j",

        "1",

    ])

    .current_dir(&project_root)

    .env("CARGO_TARGET_DIR", &wasm_target_dir)

    .env_remove("CARGO_MAKEFLAGS")

    .env_remove("MAKEFLAGS")

    .env_remove("RUSTC_WRAPPER")

    .env_remove("RUSTC_WORKSPACE_WRAPPER")

    .env_remove("RUSTFLAGS")

    .env_remove("CARGO_ENCODED_RUSTFLAGS");

    if profile == "release" {

    }

    assert!(

        cmd.status().expect("Failed to execute cargo").success(),

    assert!(

        wasm_file.exists(),

    let out_dir = PathBuf::from("static/wasm");

    std::fs::create_dir_all(&out_dir).expect("Failed to create output directory");

    let out_wasm = out_dir.join("nomisync_frontend_bg.wasm");

    Bindgen::new()

        .input_path(&wasm_file)

        .web(true)

        .expect("Failed to set web mode")

        .omit_default_module_path(false)

        .typescript(false)

        .generate(&out_dir)

        .expect("Failed to generate WASM bindings");

    if profile == "release" {

    }

}