use galactica_system::data::ShipState;
use galactica_util::constants::{RADIALBAR_SPRITE_INSTANCE_LIMIT, UI_SPRITE_INSTANCE_LIMIT};
use std::f32::consts::TAU;

use crate::{
	datastructs::RenderState,
	vertexbuffer::{
		types::{RadialBarInstance, UiInstance},
		BufferObject,
	},
	PositionAnchor, RenderInput,
};

pub(super) struct Status {}
impl Status {
	pub fn new() -> Self {
		Self {}
	}
}

impl Status {
	pub fn draw(&mut self, input: &RenderInput, state: &mut RenderState) {
		if state.vertex_buffers.ui_counter as u64 > UI_SPRITE_INSTANCE_LIMIT {
			// TODO: no panic, handle this better.
			panic!("UI limit exceeded!")
		}

		let max_shields;
		let current_shields;
		let current_hull;
		let max_hull;
		let player_ship = input
			.systemsim
			.get_ship(&galactica_system::phys::PhysSimShipHandle(
				input.player.ship.unwrap(),
			))
			.unwrap();

		match player_ship.data.get_state() {
			ShipState::Landed { .. } | ShipState::Collapsing { .. } | ShipState::Flying => {
				max_shields = player_ship.data.get_outfits().get_shield_strength();
				current_shields = player_ship.data.get_shields();
				current_hull = player_ship.data.get_hull();
				max_hull = input.ct.get_ship(player_ship.data.get_content()).hull;
			}
		}

		state.queue.write_buffer(
			&state.vertex_buffers.ui.instances,
			UiInstance::SIZE * state.vertex_buffers.ui_counter,
			bytemuck::cast_slice(&[UiInstance {
				anchor: PositionAnchor::NeNe.to_int(),
				position: [-10.0, -10.0],
				angle: 0.0,
				size: 200.0,
				color: [1.0, 1.0, 1.0, 1.0],
				sprite_index: input.ct.get_sprite_handle("ui::status").get_index(),
			}]),
		);
		state.vertex_buffers.ui_counter += 1;

		// We add two items here, so +2
		if state.vertex_buffers.radialbar_counter as u64 + 2 > RADIALBAR_SPRITE_INSTANCE_LIMIT {
			// TODO: no panic, handle this better.
			panic!("Radialbar limit exceeded!")
		}

		state.queue.write_buffer(
			&state.vertex_buffers.radialbar.instances,
			RadialBarInstance::SIZE * state.vertex_buffers.radialbar_counter,
			bytemuck::cast_slice(&[RadialBarInstance {
				position: [-19.0, -19.0],
				anchor: PositionAnchor::NeNe.to_int(),
				diameter: 182.0,
				stroke: 5.0,
				color: [0.3, 0.6, 0.8, 1.0],
				angle: (current_shields / max_shields) * TAU,
			}]),
		);
		state.vertex_buffers.radialbar_counter += 1;

		state.queue.write_buffer(
			&state.vertex_buffers.radialbar.instances,
			RadialBarInstance::SIZE * state.vertex_buffers.radialbar_counter,
			bytemuck::cast_slice(&[RadialBarInstance {
				position: [-27.0, -27.0],
				anchor: PositionAnchor::NeNe.to_int(),
				diameter: 166.0,
				stroke: 5.0,
				color: [0.8, 0.7, 0.5, 1.0],
				angle: (current_hull / max_hull) * TAU,
			}]),
		);
		state.vertex_buffers.radialbar_counter += 1;
	}
}