use std::collections::HashMap;
use zbus::Connection;
use zbus::blocking::MessageIterator;
use zbus::fdo::Result;
use zbus::zvariant::Value;
use zbus::MatchRule;
use zbus_names::InterfaceName;
use zbus_names::WellKnownName;
use std::fmt;
//use tokio;

fn print_type_of<T>(_: &T) {
    println!("{}", std::any::type_name::<T>());
}

// Actions field of notication
struct NotifAction<'a> {
    action_id: &'a str,
    action: &'a str,
}

impl fmt::Display for NotifAction<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        writeln!(f, "{}: {}", &self.action_id, &self.action)?;

        Ok(())
    }
}

// Structure of a notification
struct Notif<'a> {
    app_name: &'a str,
    replace_id: u32,
    ico: &'a str,
    summary: &'a str,
    body: &'a str,
    actions: &'a [&'a str],
    hints: HashMap<&'a str, &'a zbus::zvariant::Value<'a >>,
    expir_timeout: i32,
}

// Function to print the contents of the notification
impl fmt::Display for Notif<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        writeln!(f, "AppName: {}", &self.app_name)?;
        writeln!(f, "ReplaceId: {}", &self.replace_id)?;
        write!(
            f,
            "Icon: {}\nSummary: {}\nBody: {}\nActions:\n",
            &self.ico, &self.summary, &self.body
        )?;
        
        let actions_len = self.actions.len();
        let i = 0;

        while i < actions_len {
            let a:NotifAction;
            a.action_id = &self.actions[i];
            a.action = &self.actions[i+1];
            println!("{a}");
            i += 1;
        };
        writeln!(f, "Hints:")?;
        for (key, value) in &self.hints {
            writeln!(f, "\t{key}: {value}")?;
        }
        match self.expir_timeout {
            -1 => writeln!(f, "None")?,
            Some(millisec) => writeln!(f, "Expiration Timeout: {millisec}")?,
            None => writeln!(f, "Error getting timeout")?,
        }
        Ok(()) // Return Ok to indicate success
    }
}

#[tokio::main]
async fn main() -> Result<()> {

    let interface = InterfaceName::try_from("org.freedesktop.Notifications").unwrap();
    let busname = WellKnownName::try_from("org.freedesktop.Notifications").unwrap();

    // Establish a connection to the session bus
    let connection = Connection::session().await?;

    // Create a match rule for the Notify signal
    /*let match_rule = MatchRule::builder()
        .msg_type(zbus::message::Type::Signal)
        .sender("org.freedesktop.Notifications")?
        .interface("org.freedesktop.Notifications")?
        .arg_path(0, "/org/freedesktop/Notifications")?
        .member("Notify")?
        .build();*/

    // Create a message iterator for the match rule
    //let mut iterator = MessageIterator::for_match_rule(match_rule, &connection, None)?;

    // Loop to handle incoming messages
    loop {
        let msg = connection.receive_message()?;
        let msg_header = msg.header()?;
        dbg!(&msg);
    
        match msg_header.message_type()? {
            zbus::message::Type::Signal => {
                // real code would check msg_header path(), interface() and member()
                // handle invalid calls, introspection, errors etc
                let arg: &str = msg.body()?;
                println!("Msg.body: {arg}");
                //connection.reply(&msg, &(format!("Hello {}!", arg)))?;
            }
            _ => continue,
        }
    }

    Ok(())
}