use bracket_lib::prelude::*;
use hecs::World;

use crate::{components::*, constants::*, resources::*};

use super::{vga_color as vga, vga_color::get_by_index};

pub fn draw(world: &World, resources: &Resources, bterm: &mut BTerm) {
    let mut rng = RandomNumberGenerator::new();

    for (_, (position, wants_to_whip)) in &mut world.query::<(&Position, &WantsToWhip)>() {
        let color = RGB::named(get_by_index(rng.range(1, 16)));
        let mut rendered_frame = wants_to_whip.frame;
        let frame_data = loop {
            let frame_data = match rendered_frame {
                0 => Some((-1, -1, '\\')),
                1 => Some((-1, 0, '─')),
                2 => Some((-1, 1, '/')),
                3 => Some((0, 1, '│')),
                4 => Some((1, 1, '\\')),
                5 => Some((1, 0, '─')),
                6 => Some((1, -1, '/')),
                7 => Some((0, -1, '│')),
                _ => None,
            };

            if let Some(data) = frame_data {
                let dest = Point {
                    x: position.x + data.0,
                    y: position.y + data.1,
                };
                if resources.map.in_bounds(dest) {
                    break frame_data;
                }
                rendered_frame += 1;
                if rendered_frame > 7 {
                    break None;
                }
            }
        };
        if let Some(data) = frame_data {
            bterm.set(
                (position.x + MAP_X as i32) + data.0,
                (position.y + MAP_Y as i32) + data.1,
                color,
                RGB::named(vga::BLACK),
                to_cp437(data.2),
            );
        };
    }
}