use mlua::UserData;

use crate::config::DUMMY_CONFIG;
use crate::lua::evalsto::EvalTo;
use crate::widgets::luaeditor::theme::HighlightTheme;

use self::bar::EditorBarTheme;

use super::super::GlobalConfig;
use super::style::Style;

pub mod bar;

#[derive(Clone, Debug, Default)]
pub struct EditorTheme {
    pub background: EvalTo<Style, ()>,
    pub highlight: HighlightTheme,
    pub cursor_line: EvalTo<Style, ()>,
    pub line_number: EvalTo<Style, ()>,
    pub active_line_number: EvalTo<Style, ()>,
    pub bar: EditorBarTheme,
}

impl EditorTheme {
    pub const fn new() -> Self {
        Self {
            background: EvalTo::Value(Style::new()),
            highlight: HighlightTheme::new(),
            cursor_line: EvalTo::Value(Style::new()),
            line_number: EvalTo::Value(Style::new()),
            active_line_number: EvalTo::Value(Style::new()),
            bar: EditorBarTheme::new(),
        }
    }
}

macro_rules! cfg {
    () => {
        GlobalConfig::get().theme.editor
    };
}

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

        fields.add_field_function_get("highlight", |_, _| Ok(cfg!().highlight.clone()));
        fields.add_field_function_set("highlight", |_, _, highlight: HighlightTheme| {
            cfg!().highlight = highlight;
            Ok(())
        });

        fields.add_field_function_get("cursor_line", |_, _| Ok(cfg!().cursor_line.clone()));
        fields.add_field_function_set("cursor_line", |_, _, cursor_line: EvalTo<Style, ()>| {
            cfg!().cursor_line = cursor_line;
            Ok(())
        });

        fields.add_field_function_get("line_number", |_, _| Ok(cfg!().line_number.clone()));
        fields.add_field_function_set("line_number", |_, _, line_number: EvalTo<Style, ()>| {
            cfg!().line_number = line_number;
            Ok(())
        });

        fields.add_field_function_get("active_line_number", |_, _| {
            Ok(cfg!().active_line_number.clone())
        });
        fields.add_field_function_set(
            "active_line_number",
            |_, _, active_line_number: EvalTo<Style, ()>| {
                cfg!().active_line_number = active_line_number;
                Ok(())
            },
        );

        fields.add_field_method_get("bar", |_, _| Ok(DUMMY_CONFIG.theme.editor.bar))
    }
}