use std::fmt;
use std::collections::HashMap;

// Structure of a notification
struct Notif {
    app_name: String,
    replace_id: Option<u32>,
    ico: String,
    summary: String,
    body: String,
    actions: Vec<(String, String)>,
    hints: HashMap<String, String>,
    expir_timeout: Option<u32>,
}

// Function to print the contents of the notification
impl fmt::Display for Notif {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f,"AppName: {}\n", &self.app_name)?;
        match self.replace_id {
            Some(notif_id) => write!(f, "ReplaceId: {}\n", notif_id)?,
            None => write!(f, "None\n")?,
        }
        write!(f,"Icon: {}\nSummary: {}\nBody: {}\nActions:\n",
               &self.ico,
               &self.summary,
               &self.body
        )?;
        for (key, label) in &self.actions {
            write!(f, "\t{}: {}\n", key, label)?;
        }
        write!(f,"Hints:\n")?;
        for (key, value) in &self.hints {
            write!(f, "\t{}: {}\n", key, value)?;
        }
        match self.expir_timeout {
            Some(millisec) => write!(f, "Expiration Timeout: {}\n", millisec)?,
            None => write!(f, "None\n")?,
        }
        Ok(()) // Return Ok to indicate success
    }
}

// Summary should be generally <= 40 chars, as per the specification.
fn truncate_summary(notif: &mut Notif) {
    if notif.summary.len() > 40 {
        notif.summary.truncate(39);
        notif.summary.push_str("…");
    }
}

fn main() {
    // Example notif
    let mut not = Notif {
        app_name: "snot".to_string(),
        replace_id: Some(0),
        ico: "alert.png".to_string(),
        summary: "This is a very long suuummmaaarrryyy! Don't you believe me????".to_string(),
        body: "short body(hehe)".to_string(),
        actions: vec![
            ("reply".to_string(), "Reply".to_string()),
            ("close".to_string(), "Close".to_string()),
        ],
        hints: HashMap::new(), // Create an empty HashMap for hints, add the hints later
        expir_timeout: Some(0)
    };
    not.hints.insert("urgency".to_string(), "critical".to_string());
    not.hints.insert("category".to_string(), "network.error".to_string());
    
    truncate_summary(&mut not); //Limit the summary length
    
    println!("{}", not);
}