use std::{
    collections::HashMap,
    fmt
};

use serde::{
    Deserialize,
    Serialize
};
use uuid::Uuid;
use crate::{contracts::*, UID, exec_job};


pub struct UClient {
    pub client_info: ClientInfo,
    pub jobs: Vec<JobMeta>, // TODO: to futures
}

impl UClient {
    pub fn new(client_info: ClientInfo) -> Self {
        Self {
            client_info,
            jobs: Vec::new()
        }
    }
}

#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct ClientInfo {
    pub info: HashMap<String, String>,
    pub id: Uuid,
}

impl ClientInfo {
    pub fn gather() -> Self {
        let mut info: HashMap<String, String> = HashMap::new();
        for job in DEFAULT_JOBS {
            let mut job_meta = JobMeta::from_shell(job.1.into());
            let job_result = exec_job(&mut job_meta);
            let job_data = match job_result.data {
                Ok(output) => output.multiline(),
                Err(e) => e.description()
            };
            info.insert(job.0.into(), job_data);
        }
        ClientInfo {
            info,
            id: *UID
        }
    }

    pub fn get_field(&self, field: &str) -> Option<&String> {
        self.info.get(field)
    }
}

impl ToMsg for ClientInfo {}

const DEFAULT_JOBS: &[(&str, &str)] = &[
    //("local ip", "ip a"),
    ("hostname", "hostname"),
    ("username", "whoami"),
    ("platform", "uname -a"),
];


#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_gather() {
        let cli_info = ClientInfo::gather();
        let field = cli_info.get_field("username").unwrap();
        assert_eq!(
            JobOutput::from_multiline(field).unwrap().stdout,
            b"plazmoid".to_vec()
        )
    }

}