use super::Mappable;
use crate::math::{LineSegment, Vec2, Rect};
use crate::scaleable::Scaleable;
use crate::transform::Transform;
use raylib::drawing::{RaylibDraw, RaylibDrawHandle};
use raylib::ffi::Color;
use std::ops::{Deref, DerefMut};

pub type WallData = LineSegment<f64>;

pub struct Wall {
    data: WallData,
    round_start: bool,
    round_end: bool,
}

impl Wall {
    pub fn from_data(data: WallData, round_start: bool, round_end: bool) -> Self {
        Self {
            data,
            round_start,
            round_end,
        }
    }

    pub fn data(&self) -> &WallData {
        &self.data
    }
}

fn draw_round_corner(rld: &mut RaylibDrawHandle, pos_px: Vec2<f64>, transform: &Transform) {
    rld.draw_circle_v(
        pos_px,
        transform.length_m_to_px(0.05) as f32,
        Color {
            r: 200,
            g: 120,
            b: 120,
            a: 255,
        },
    );
}

impl Mappable for Wall {
    fn draw(&self, rld: &mut RaylibDrawHandle, transform: &Transform) {
        let start_px = transform.point_m_to_px(&self.data.start);
        let end_px = transform.point_m_to_px(&self.data.end);
        rld.draw_line_ex(
            start_px,
            end_px,
            transform.length_m_to_px(0.1) as f32,
            Color {
                r: 200,
                g: 120,
                b: 120,
                a: 255,
            },
        );

        if self.round_start {
            draw_round_corner(rld, start_px, transform);
        }
        if self.round_end {
            draw_round_corner(rld, end_px, transform);
        }
    }

    fn bounding_rect(&self) -> Rect<f64> {
        Rect::bounding_rect(self.data.start, self.data.end)
    }
}

impl Scaleable for Wall {
    fn scale(&mut self, by: &Vec2<f64>) {
        if by.x <= 0. || by.y <= 0. {
            panic!("Cannot set dimensions with negative size");
        }

        self.data.start.x *= by.x;
        self.data.start.y *= by.y;
        self.data.end.x *= by.x;
        self.data.end.y *= by.y;
    }
}

impl Deref for Wall {
    type Target = WallData;

    fn deref(&self) -> &Self::Target {
        &self.data
    }
}

impl DerefMut for Wall {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.data
    }
}