use super::Tool;
use crate::map_data::MapData;
use crate::math::{self, Vec2};
use crate::transform::Transform;
use raylib::core::drawing::{RaylibDraw, RaylibDrawHandle};
use raylib::ffi::{Color, MouseButton, Vector2};
use raylib::RaylibHandle;

pub struct WallTool {
    unfinished_wall: Option<(Vec2<f32>, Vec2<f32>)>,
}

impl WallTool {
    pub fn new() -> Self {
        Self {
            unfinished_wall: None,
        }
    }
}

impl Tool for WallTool {
    fn active_update(&mut self, map_data: &mut MapData, rl: &RaylibHandle, transform: &Transform) {
        let mouse_pos_m = transform.point_px_to_m(rl.get_mouse_position().into());
        if let Some((_, ref mut pos2)) = &mut self.unfinished_wall {
            let snapped_mouse_pos = Vec2::new(
                math::round(mouse_pos_m.x, 0.5),
                math::round(mouse_pos_m.y, 0.5),
            );
            *pos2 = snapped_mouse_pos;
        }

        if rl.is_mouse_button_pressed(MouseButton::MOUSE_LEFT_BUTTON) {
            if let Some((pos1, pos2)) = self.unfinished_wall {
                map_data.walls_mut().push((pos1, pos2));
                self.unfinished_wall = None;
            } else {
                let snapped_mouse_pos = Vec2::new(
                    math::round(mouse_pos_m.x, 0.5),
                    math::round(mouse_pos_m.y, 0.5),
                );
                self.unfinished_wall = Some((snapped_mouse_pos, snapped_mouse_pos))
            }
        }

        if rl.is_mouse_button_pressed(MouseButton::MOUSE_RIGHT_BUTTON) {
            self.unfinished_wall = None;
        }
    }

    fn draw(&self, map_data: &MapData, rld: &mut RaylibDrawHandle, transform: &Transform) {
        for &(pos1, pos2) in map_data.walls() {
            let pos1: Vector2 = transform.point_m_to_px(pos1).into();
            let pos2: Vector2 = transform.point_m_to_px(pos2).into();
            rld.draw_line_ex(
                pos1,
                pos2,
                transform.length_m_to_px(0.1),
                Color {
                    r: 200,
                    g: 120,
                    b: 120,
                    a: 255,
                },
            );
        }

        if let Some((pos1, pos2)) = self.unfinished_wall {
            let pos1: Vector2 = transform.point_m_to_px(pos1).into();
            let pos2: Vector2 = transform.point_m_to_px(pos2).into();
            rld.draw_line_ex(
                pos1,
                pos2,
                transform.length_m_to_px(0.1),
                Color {
                    r: 150,
                    g: 200,
                    b: 150,
                    a: 255,
                },
            );
        }
    }
}