use serde::de::DeserializeOwned;
use serde_json::{from_slice, Value};
use shlex::split;
use std::fmt::Display;
use std::process::{Command, Output};
use u_lib::{
    datatypes::DataResult,
    utils::{bytes_to_string, ProcOutput},
};

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: DeserializeOwned>(argv: &[&str]) -> PanelResult<T> {
        let result = Self::run(argv);
        let output = ProcOutput::from_output(&result).to_appropriate();
        from_slice(&output).map_err(|e| {
            eprintln!(
                "Failed to decode panel response: '{}'",
                bytes_to_string(&output)
            );
            e.to_string()
        })
    }

    pub fn output<T: DeserializeOwned>(args: impl Into<String> + Display) -> PanelResult<T> {
        println!("Executing '{PANEL_BINARY} {}'", &args);
        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: DeserializeOwned>(data: PanelResult<T>) -> T {
        match data.unwrap() {
            DataResult::Ok(r) => r,
            DataResult::Err(e) => panic!("Panel failed: {}", e),
        }
    }

    pub fn check_status(args: impl Into<String> + Display) {
        let result: PanelResult<Value> = Self::output(args);
        Self::status_is_ok(result);
    }

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