use std::{
    env,
    error::Error,
    fmt::format,
    fs::{self, File},
    io::{Read, Write},
    path,
};
use toml::Table;
use toml::{self, Value};
fn main() -> Result<(), Box<dyn Error>> {
    let mut args: Vec<String> = env::args().collect();
    args.remove(0);
    let file_path = &args[0];
    println!("{}", file_path);

    let mut file = File::open(file_path).expect("Unable to open the file");

    let mut contents = String::new();
    file.read_to_string(&mut contents)
        .expect("Unable to read the file");

    let value = contents.parse::<Table>().unwrap();

    fs::remove_dir_all("disk")?;
    fs::create_dir("disk")?;

    // HANDLE repolist
    {
        let repolist = value.get("repositories").unwrap();
        let ret = make_repolist("repolist.toml".to_string(), repolist);
        println!("making repolist {:?}", ret);
    }

    // HANDLE boot
    {
        let boot = value.get("boot").unwrap();
        let boot_table = boot.as_table().unwrap();

        if boot_table.contains_key("limine") {
            let limine = boot_table.get("limine").unwrap();
            let ret = make_limine_cfg(limine);
            println!("limine return {:?}", ret);
        }
        // println!("{:#?}", boot);
    }

    // HANDLE users
    {
        let mut passhash_list: Vec<(String, String)> = vec![];

        let users = value.get("users").unwrap();
        // println!("{:?}", users.as_table().unwrap().keys());
        let users_table = users.as_table().unwrap();

        for user in users_table.keys() {
            let ut = users_table.get(user).unwrap();
            let home_path = ut.get("home").unwrap();
            let pass_hash = ut.get("password_hash").unwrap();

            passhash_list.push((user.to_string(), pass_hash.to_string()));

            let ret = make_user(home_path.to_string());
            println!("making user return {:?}", ret);
            // Handle homepath generation of USER
            {
                let mut hp = home_path.clone().to_string();
                hp.remove(0);
                hp.remove(0);
                hp.remove(hp.len() - 1);
                hp.remove(hp.len() - 1);
                for package in ut.get("packages").unwrap().as_table().unwrap().keys() {
                    let pack_folder: String = format!("disk/{}/{}", hp, package);
                    let pack_config: String = format!("disk/{}/{}/config.toml", hp, package);

                    fs::create_dir(pack_folder)?;
                    let mut file = File::create(pack_config)?;
                    // repo_list_str.as_bytes()
                    let abc = ut
                        .get("packages")
                        .unwrap()
                        .get(package)
                        .unwrap()
                        .get("configuration")
                        .unwrap();
                    let mut abc = abc.to_string();
                    if abc.len() > 2 {
                        abc.remove(0);
                        abc.remove(0);
                        abc.remove(abc.len() - 1);
                        abc.remove(abc.len() - 1);
                    }
                    if abc.len() == 2 {
                        abc.remove(0);
                        abc.remove(0);
                    }

                    file.write_all(abc.as_bytes())?;
                }
            }
            {
                let repolist = ut.get("repositories").unwrap();

                let mut hp = home_path.clone().to_string();
                hp.remove(0);
                hp.remove(0);
                hp.remove(hp.len() - 1);
                hp.remove(hp.len() - 1);

                let user_path_repolist = format!("{}/repolist.toml", hp.to_string());
                println!("{}", user_path_repolist);
                let ret = make_repolist(user_path_repolist, repolist);
                println!("making repolist {:?}", ret);
            }
        }

        let ret = generate_password_hashlist(passhash_list);
        println!("making password hashlist {:?}", ret);
    }

    // let mut file = File::create("disk/foo.txt")?;
    // file.write_all(b"Hello, world!")?;

    Ok(())
}

pub fn make_limine_cfg(limine: &Value) -> std::io::Result<()> {
    let mut limine_str = String::new();
    // raw_limine
    {
        let mut lc = limine.clone();
        let boot_entries = lc.as_table_mut().unwrap();
        let default_entry = boot_entries.get("default_entry").unwrap();
        let timeout = boot_entries.get("timeout").unwrap();
        let interface_resolution = boot_entries.get("interface_resolution").unwrap();
        let verbose = boot_entries.get("verbose").unwrap();
        let term_wallpaper = boot_entries.get("term_wallpaper").unwrap();

        let vb_post = match verbose.as_bool().unwrap() {
            true => "yes",
            false => "no",
        };
        let term_background = boot_entries
            .get("term_backdrop")
            .unwrap_or(&Value::Integer(0));
        let base = format!(
            "DEFAULT_ENTRY={}
TIMEOUT={}
VERBOSE={}
INTERFACE_RESOLUTION={}
# Terminal related settings
TERM_WALLPAPER={}
TERM_BACKDROP={}
",
            default_entry, timeout, vb_post, interface_resolution, term_wallpaper, term_background
        );
        limine_str.push_str(&base);
    }
    // HANDLE boot_entries
    {
        let mut lc = limine.clone();
        let boot_entries = lc.as_table_mut().unwrap();
        let mut real_boot_entries = boot_entries.clone();
        for (key, value) in boot_entries.into_iter() {
            if !value.is_table() {
                real_boot_entries.remove(key);
            }
        }

        for (name, value) in real_boot_entries {
            let comment = value.get("comment").unwrap();
            let protocol = value.get("protocol").unwrap();
            let resolution = value.get("resolution").unwrap();
            let kernel_path = value.get("kernel_path").unwrap();
            let kernel_cmdline = value.get("kernel_cmdline").unwrap();
            let entry = format!(
                "
:{}
    COMMENT={}
    PROTOCOL={}
    RESOLUTION={}
    KERNEL_PATH={}
    KERNEL_CMDLINE={}
",
                name, comment, protocol, resolution, kernel_path, kernel_cmdline,
            );
            limine_str.push_str(&entry);
        }
    }
    let mut file = File::create("disk/limine.cfg")?;
    file.write_all(limine_str.as_bytes())?;
    Ok(())
}

pub fn make_user(mut home_path: String) -> std::io::Result<()> {
    home_path.remove(0);
    home_path.remove(home_path.len() - 1);

    let path = format!("disk/{}", home_path);
    fs::create_dir_all(path)?;
    Ok(())
}

pub fn make_repolist(path: String, repolist: &Value) -> std::io::Result<()> {
    let path = format!("disk/{}", path);
    let mut file = File::create(path)?;
    let mut repo_list_str = String::new();
    for (repo_name, repo_url) in repolist.as_table().unwrap() {
        let entry = format!("{} = {}\n", repo_name, repo_url);
        repo_list_str.push_str(&entry);
    }
    file.write_all(repo_list_str.as_bytes())?;
    Ok(())
}

pub fn generate_password_hashlist(passhash_list: Vec<(String, String)>) -> std::io::Result<()> {
    let mut file = File::create("disk/passwords.toml")?;
    let mut file_cont = String::new();
    for (user, hash) in passhash_list {
        let ret = format!("{}={}\n", user, hash);
        file_cont.push_str(&ret);
    }
    file.write_all(file_cont.as_bytes())?;

    Ok(())
}