use super::Tool;
use crate::map::Map;
use crate::math::{Rect, Surface, Vec2};
use crate::transform::Transform;
use raylib::core::drawing::{RaylibDraw, RaylibDrawHandle};
use crate::colours::DEFAULT_COLOURS;

pub struct SelectionTool {
    selection_rect: Option<(Vec2<f64>, Vec2<f64>)>,
}

impl SelectionTool {
    pub fn new() -> Self {
        Self {
            selection_rect: None,
        }
    }
}

impl Tool for SelectionTool {
    fn deactivate(&mut self) {
        self.selection_rect = None;
    }

    fn update(&mut self, _map: &Map, mouse_pos_m: &Vec2<f64>) {
        if let Some((_, ref mut pos2)) = &mut self.selection_rect {
            *pos2 = *mouse_pos_m;
        }
    }

    fn draw(&self, rld: &mut RaylibDrawHandle, transform: &Transform) {
        if let Some((pos1, pos2)) = self.selection_rect {
            let rect_px = transform.rect_m_to_px(&Rect::bounding_rect(pos1, pos2));
            rld.draw_rectangle_rec(
                rect_px,
                DEFAULT_COLOURS.selection_rect
            );
            rld.draw_rectangle_lines_ex(
                rect_px,
                4,
                DEFAULT_COLOURS.selection_rect_outline
            );
        }
    }

    fn place_single(&mut self, map: &mut Map, mouse_pos_m: &Vec2<f64>) {
        if let Some((pos1, pos2)) = self.selection_rect {
            // Select all items on the map that are inside of the selection rectangle
            let bounds = Rect::bounding_rect(pos1, pos2);
            for element in map.elements_mut() {
                // TODO: Make it possible to do this additively by custom keybinding.
                element.set_selected(bounds.contains_rect(&element.bounding_rect()));
            }
            self.selection_rect = None;
        } else {
            self.selection_rect = Some((*mouse_pos_m, *mouse_pos_m));
        }
    }

    fn abort(&mut self) {
        self.selection_rect = None;
    }
}