use std::{fmt, io};

use fmt::{Display, Formatter, Result};
use zip::result::ZipError;

/// Represents all possible errors that can occur in the DML launcher.
///
/// This enum centralizes error handling for the entire application,
/// wrapping various underlying error types from I/O, HTTP requests,
/// JSON parsing, ZIP extraction, configuration issues, and runtime errors.
#[allow(dead_code)]
#[derive(Debug)]
pub enum McError {
    Io(io::Error),
    Http(reqwest::Error),
    Json(serde_json::Error),
    Zip(ZipError),
    Config(String),
    ShaMismatch(String),
    Process(String),
    Runtime(String),
}

impl Display for McError {
    /// Formats the error for user-friendly display.
    ///
    /// Currently, it uses the `Debug` format for simplicity.
    fn fmt(&self, f: &mut Formatter<'_>) -> Result { write!(f, "{:?}", self) }
}

impl From<io::Error> for McError {
    fn from(e: io::Error) -> Self { Self::Io(e) }
}

impl From<reqwest::Error> for McError {
    fn from(e: reqwest::Error) -> Self { Self::Http(e) }
}

impl From<serde_json::Error> for McError {
    fn from(e: serde_json::Error) -> Self { Self::Json(e) }
}

impl From<ZipError> for McError {
    fn from(e: ZipError) -> Self { Self::Zip(e) }
}