use mlua::{IntoLua, Table, UserData};
use ratatui::style::Color;

use crate::config::GlobalConfig;

use super::colorpair::ColorPair;

#[derive(Clone)]
pub struct SheetViewTheme {
    pub cursor: ColorPair,
    pub selection: ColorPair,
    pub cell: (ColorPair, ColorPair),
}

impl SheetViewTheme {
    pub const fn new() -> Self {
        Self {
            cursor: ColorPair::new(Color::Black, Color::White),
            selection: ColorPair::new(Color::White, Color::DarkGray),
            cell: (
                ColorPair::new(Color::White, Color::Black),
                ColorPair::new(Color::White, Color::DarkGray),
            ),
        }
    }
}

macro_rules! cfg {
    () => {
        GlobalConfig::instance().theme.sheetview
    };
}

macro_rules! cfg_mut {
    () => {
        GlobalConfig::instance_mut().theme.sheetview
    };
}

impl UserData for SheetViewTheme {
    fn add_fields<'lua, F: mlua::prelude::LuaUserDataFields<'lua, Self>>(fields: &mut F) {
        fields.add_field_function_get("cursor", |_, _| Ok(cfg!().cursor.clone()));

        fields.add_field_function_set("cursor", |_, _, pair: ColorPair| {
            cfg_mut!().cursor = pair;
            Ok(())
        });

        fields.add_field_function_get("selection", |_, _| Ok(cfg!().selection.clone()));

        fields.add_field_function_set("selection", |_, _, pair: ColorPair| {
            cfg_mut!().selection = pair;
            Ok(())
        });

        fields.add_field_function_get("cell", |lua, _| {
            let table = lua.create_table()?;
            let sel = cfg!().cell.clone();
            table.set(1, sel.0)?;
            table.set(2, sel.1)?;
            Ok(table.into_lua(lua)?)
        });

        fields.add_field_function_set("cell", |_, _, pair: Table| {
            cfg_mut!().cell = (pair.get(1)?, pair.get(2)?);
            Ok(())
        });
    }
}