macro_rules! BarTheme {
    ($name:ident, $type:ty, $cfg:expr, $cfg_mut:expr) => {
        use crate::config::theme::style::Style;
        use crate::lua::evalsto::EvalTo;
        use crate::widgets::statusbar::StatusBar;
        use mlua::{Lua, UserData};

        #[derive(Debug, Default, Clone)]
        pub struct $name {
            pub left: EvalTo<Style, $type>,
            pub middle: EvalTo<Style, $type>,
            pub right: EvalTo<Style, $type>,
        }

        impl $name {
            pub const fn new() -> Self {
                Self {
                    left: EvalTo::Value(Style::new()),
                    middle: EvalTo::Value(Style::new()),
                    right: EvalTo::Value(Style::new()),
                }
            }

            pub fn apply(bar: &mut StatusBar, mode: $type, lua: &Lua) {
                let (left, middle, right) = (
                    $cfg.left.get(mode, lua).unwrap_or_default().style(),
                    $cfg.middle.get(mode, lua).unwrap_or_default().style(),
                    $cfg.right.get(mode, lua).unwrap_or_default().style(),
                );

                bar.set_left_style(left);
                bar.set_middle_style(middle);
                bar.set_right_style(right);
            }
        }

        impl UserData for $name {
            fn add_fields<'lua, F: mlua::prelude::LuaUserDataFields<'lua, Self>>(fields: &mut F) {
                fields.add_field_function_get("left", |_, _| Ok($cfg.left.clone()));
                fields.add_field_function_set("left", |_, _, style: EvalTo<Style, $type>| {
                    $cfg_mut.left = style;
                    Ok(())
                });

                fields.add_field_function_get("middle", |_, _| Ok($cfg.middle.clone()));
                fields.add_field_function_set("middle", |_, _, style: EvalTo<Style, $type>| {
                    $cfg_mut.middle = style;
                    Ok(())
                });

                fields.add_field_function_get("right", |_, _| Ok($cfg.right.clone()));
                fields.add_field_function_set("right", |_, _, style: EvalTo<Style, $type>| {
                    $cfg_mut.right = style;
                    Ok(())
                });
            }
        }
    };
}

pub(super) use BarTheme;