//! The rectangle room tool is a specialised tool to create rooms of rectangular shape and with the
//! sides of the room parallel to the x and y-axes. This is often useful, when a quick room creation
//! is necessary and the shape of the room does not have to be very special.

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

/// The tool to create simple, rectangular rooms.
pub struct RectRoomTool {
    /// The rectangle that is currently being drawn by the user. Once it is finished, it will be
    /// pushed into the room_rects.
    unfinished_rect: Option<(Vec2<f64>, Vec2<f64>)>,
}

impl RectRoomTool {
    /// Create a new room tool where no rooms have been drawn yet. Should be created only once per
    /// program instance and by the editor.
    #[allow(clippy::new_without_default)]
    pub fn new() -> Self {
        Self {
            unfinished_rect: None,
        }
    }
}

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

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

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

    fn place_single(&mut self, map: &mut Map, mouse_pos_m: &Vec2<f64>) {
        // Try to finish the rectangle if it has been started.
        if let Some((pos1, pos2)) = self.unfinished_rect {
            if pos1 == pos2 {
                warn!("Cannot place rectangle with start and endpoint being the same");
                return;
            }

            map.push_rect_room(Rect::bounding_rect(pos1, pos2));
            self.unfinished_rect = None;
        } else {
            self.unfinished_rect = Some((*mouse_pos_m, *mouse_pos_m));
        }
    }

    fn finish(&mut self, map: &mut Map) {
        if let Some((pos1, pos2)) = self.unfinished_rect {
            if pos1 == pos2 {
                warn!("Cannot place rectangle with start and endpoint being the same");
                return;
            }

            map.push_rect_room(Rect::bounding_rect(pos1, pos2));
            self.unfinished_rect = None;
        }
    }

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