use cnx::{
    text::{Attributes, Font, Padding, PagerAttributes},
    widgets::{ActiveWindowTitle, Clock, Pager},
    Cnx,
};
use thiserror::Error;

use crate::{
    config::Config,
    hlwm::{
        color::{Color, X11Color},
        command::CommandError,
    },
};

type Result<T> = std::result::Result<T, PanelError>;

#[derive(Debug, Error)]
pub enum PanelError {
    #[error("command error: [{0}]")]
    CommandError(#[from] CommandError),
    #[error("io lib error: [{0}]")]
    IoError(#[from] std::io::Error),
    #[error("cnx panel error: [{0}]")]
    CnxPanelError(#[from] anyhow::Error),
}

pub fn panel(config: &Config) -> Result<()> {
    let font = Font::new(&config.font_pango);
    let font_bold = Font::new(&config.font_pango_bold);
    let (active, normal, text) = (
        config
            .theme
            .active_color()
            .expect("could not get theme's active color"),
        config
            .theme
            .normal_color()
            .expect("could not get theme's normal color"),
        config
            .theme
            .text_color()
            .expect("could not get theme's text color"),
    );
    let attr = Attributes {
        font: font.clone(),
        fg_color: text.into(),
        bg_color: Some(Color::BLACK.into()),
        padding: Padding::new(10.0, 10.0, 0.0, 0.0),
    };
    let pager_attr = PagerAttributes {
        active_attr: Attributes {
            font: font_bold.clone(),
            fg_color: text.into(),
            bg_color: Some(active.into()),
            padding: Padding::new(8.0, 8.0, 0.0, 0.0),
        },
        inactive_attr: Attributes {
            font: font.clone(),
            fg_color: Color::X11(X11Color::DimGray).into(),
            bg_color: Some(Color::BLACK.into()),
            padding: Padding::new(5.0, 5.0, 0.0, 0.0),
        },
        non_empty_attr: Attributes {
            font: font.clone(),
            fg_color: text.into(),
            bg_color: Some(normal.into()),
            padding: Padding::new(5.0, 5.0, 0.0, 0.0),
        },
    };

    let mut cnx = Cnx::new(cnx::Position::Top);
    cnx.add_widget(Pager::new(pager_attr));
    cnx.add_widget(ActiveWindowTitle::new(attr.clone()));
    cnx.add_widget(Clock::new(
        attr.clone(),
        Some(String::from("%H:%M %a %Y-%m-%d")),
    ));
    cnx.run()?;
    Ok(())
}