use serde::{
    Serialize,
    Deserialize
};
use std::time::SystemTime;
use std::fmt;
use diesel::{
    Queryable,
    Identifiable,
    Insertable
};

use crate::{
    models::*,
    UID,
    utils::*,
    models::schema::*,
};

use guess_host_triple::guess_host_triple;
use uuid::Uuid;

//belongs_to
#[derive(Clone, Debug, Serialize, Deserialize, Identifiable, Queryable)]
#[table_name = "agents"]
pub struct Agent {
    pub alias: Option<String>,
    pub hostname: String,
    pub id: Uuid,
    pub is_root: bool,
    pub is_root_allowed: bool,
    pub last_active: SystemTime,
    pub platform: String,
    pub regtime: SystemTime,
    pub status: Option<String>,
    pub token: Option<String>,
    pub username: String
}

impl fmt::Display for Agent {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let mut out = format!("Agent {}", self.id);
        if self.alias.is_some() {
            out += &format!(" ({})", self.alias.as_ref().unwrap())
        }
        out += &format!("\nHostname: {}", self.hostname);
        out += &format!("\nIs root: {}", self.is_root);
        out += &format!("\nRoot allowed: {}", self.is_root_allowed);
        out += &format!("\nLast active: {}", systime_to_string(&self.last_active));
        out += &format!("\nPlatform: {}", self.platform);
        out += &format!("\nUsername: {}", self.username);
        write!(f, "{}", out)
    }
}

#[derive(Clone, Debug, Serialize, Deserialize, Insertable)]
#[table_name = "agents"]
pub struct IAgent {
    pub alias: Option<String>,
    pub id: Uuid,
    pub hostname: String,
    pub is_root: bool,
    pub is_root_allowed: bool,
    pub platform: String,
    pub status: Option<String>,
    pub token: Option<String>,
    pub username: String
}


pub async fn gather() -> IAgent {
    async fn run_cmd_fast<S: Into<String>>(cmd: S) -> String {
        let jm = JobMeta::from_shell(cmd);
        let job_result = build_jobs(jm)
            .run_one_until_complete()
            .await
            .unwrap()
            .result
            .unwrap();
        JobOutput::from_raw(&job_result)
            .map(|o| vec_to_string(&o.into_appropriate()))
            .unwrap_or(String::from_utf8_lossy(&job_result).to_string())
    }

    #[cfg(unix)]
    IAgent {
        alias: None,
        id: UID.clone(),
        hostname: run_cmd_fast("hostname").await,
        is_root: &run_cmd_fast("id -u").await == "0",
        is_root_allowed: false, //TODO
        platform: guess_host_triple().unwrap_or("Error").to_string(),
        status: None, //TODO
        token: None, //TODO
        username: run_cmd_fast("id -un").await,
    }
}


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

    #[tokio::test]
    async fn test_gather() {
        let cli_info = gather().await;
        assert_eq!(
            &cli_info.username,
            "plazmoid"
        )
    }

}