extern crate self as kaptan_log;

use kaptan_log_derive::KaptanError;

pub struct StaticErrorMessage(&'static str);

impl StaticErrorMessage {
    pub const fn new(text: &'static str) -> Self {
        Self(text)
    }

    pub const fn as_str(&self) -> &'static str {
        self.0
    }
}

pub trait ErrorReport {
    fn error_message(&self) -> &'static StaticErrorMessage;
}

#[derive(Debug, KaptanError)]
enum Generic<'a, T>
where
    T: Copy,
{
    Unit,
    Tuple(T, u8),
    Named { label: &'a str },
}

fn main() {
    fn assert_error<T: core::error::Error>() {}
    assert_error::<Generic<'_, u8>>();
    assert_eq!(
        Generic::<u8>::Unit.error_message().as_str(),
        concat!(module_path!(), "::Generic::Unit"),
    );
    assert_eq!(
        Generic::Tuple(1_u8, 2).error_message().as_str(),
        concat!(module_path!(), "::Generic::Tuple"),
    );
    let named: Generic<'_, u8> = Generic::Named { label: "test" };
    assert_eq!(
        named.to_string(),
        concat!(module_path!(), "::Generic::Named"),
    );
}