use serde::de::DeserializeOwned;
use serde_json::from_slice;
use shlex::split;
use std::process::{Command, Output};
use u_lib::{datatypes::DataResult, messaging::AsMsg};

const PANEL_BINARY: &str = "/u_panel";

type PanelResult<T> = Result<DataResult<T>, String>;

pub struct Panel;

impl Panel {
    fn run(args: &[&str]) -> Output {
        Command::new(PANEL_BINARY)
            .arg("--json")
            .args(args)
            .output()
            .unwrap()
    }

    pub fn output_argv<T: AsMsg + DeserializeOwned>(args: &[&str]) -> PanelResult<T> {
        let result = Self::run(args);
        assert!(result.status.success());
        from_slice(&result.stdout).map_err(|e| e.to_string())
    }

    pub fn output<T: AsMsg + DeserializeOwned>(args: impl Into<String>) -> PanelResult<T> {
        let splitted = split(args.into().as_ref()).unwrap();
        Self::output_argv(
            splitted
                .iter()
                .map(|s| s.as_ref())
                .collect::<Vec<&str>>()
                .as_ref(),
        )
    }

    fn status_is_ok<T: AsMsg + DeserializeOwned>(data: PanelResult<T>) -> T {
        match data.unwrap() {
            DataResult::Ok(r) => r,
            DataResult::Err(e) => panic!("Panel failed with erroneous status: {}", e),
        }
    }

    pub fn check_status<'s, T: AsMsg + DeserializeOwned>(args: &'s str) {
        let result: PanelResult<T> = Self::output(args);
        Self::status_is_ok(result);
    }

    pub fn check_output<T: AsMsg + DeserializeOwned>(args: impl Into<String>) -> T {
        let result = Self::output(args);
        Self::status_is_ok(result)
    }
}