use bevy::prelude::*;
use bevy_ratatui::event::MouseMessage;
use ratatui::layout::Position;

use crate::tui::{
    input::{ConfirmSelect, Hovered, StartSelect},
    render::PickRegion,
};

pub(crate) fn mouse(
    mut commands: Commands,
    mut mouse_reader: MessageReader<MouseMessage>,
    mut event_writer: MessageWriter<ConfirmSelect>,
    entities: Query<(Entity, &PickRegion)>,
    hovered: Query<(Entity, &PickRegion), With<Hovered>>,
    startselected: Query<(Entity, &PickRegion), With<StartSelect>>,
) {
    for message in mouse_reader.read() {
        let event = message.0;
        // let term_size = context.size().unwrap();
        let position = Position::new(event.column, event.row);
        match event.kind {
            #[allow(clippy::single_match)]
            ratatui::crossterm::event::MouseEventKind::Down(mouse_button) => match mouse_button {
                ratatui::crossterm::event::MouseButton::Left => {
                    for (entity, region) in &entities {
                        if region.area.contains(position) {
                            commands.entity(entity).insert(StartSelect);
                        }
                    }
                }

                // ratatui::crossterm::event::MouseButton::Right => debug!("unhandled mouse event"),
                // ratatui::crossterm::event::MouseButton::Middle => debug!("unhandled mouse event"),
                _ => {}
            },
            ratatui::crossterm::event::MouseEventKind::Moved => {
                for (entity, region) in &hovered {
                    if !region.area.contains(position) {
                        commands.entity(entity).remove::<Hovered>();
                    }
                }
                for (entity, region) in &entities {
                    if region.area.contains(position) {
                        commands.entity(entity).insert(Hovered);
                    }
                }
            }
            ratatui::crossterm::event::MouseEventKind::Up(mouse_button) => match mouse_button {
                ratatui::crossterm::event::MouseButton::Left => {
                    for (entity, region) in &startselected {
                        if region.area.contains(position) {
                            commands.entity(entity).remove::<StartSelect>();
                            event_writer.write(ConfirmSelect(entity));
                        }
                    }
                }
                ratatui::crossterm::event::MouseButton::Right => {
                    for (entity, _) in &startselected {
                        commands.entity(entity).remove::<StartSelect>();
                    }
                }
                // ratatui::crossterm::event::MouseButton::Middle => debug!("unhandled mouse event"),
                _ => {}
            },
            ratatui::crossterm::event::MouseEventKind::Drag(mouse_button) => {
                // debug!("unhandled mouse event")
            }
            ratatui::crossterm::event::MouseEventKind::ScrollDown => {
                // debug!("unhandled mouse event")
            }
            ratatui::crossterm::event::MouseEventKind::ScrollUp => {
                // debug!("unhandled mouse event")
            }
            ratatui::crossterm::event::MouseEventKind::ScrollLeft => {
                // debug!("unhandled mouse event")
            }
            ratatui::crossterm::event::MouseEventKind::ScrollRight => {
                // debug!("unhandled mouse event")
            }
        }
    }
}