mod consts;
mod game;
mod inputstatus;
mod objects;
mod physics;
mod shipbehavior;

use std::path::PathBuf;

use anyhow::Result;
use winit::{
	event::{Event, KeyboardInput, WindowEvent},
	event_loop::{ControlFlow, EventLoop},
	window::WindowBuilder,
};

fn main() -> Result<()> {
	// TODO: error if missing
	let content = galactica_content::Content::load_dir(
		PathBuf::from(consts::CONTENT_ROOT),
		PathBuf::from(consts::TEXTURE_ROOT),
		consts::STARFIELD_TEXTURE_NAME.to_owned(),
	)?;

	let event_loop = EventLoop::new();
	let window = WindowBuilder::new().build(&event_loop).unwrap();
	let mut gpu = pollster::block_on(galactica_render::GPUState::new(window, &content))?;

	let mut game = game::Game::new(content);
	gpu.update_starfield_buffer(&game.system.starfield);

	event_loop.run(move |event, _, control_flow| {
		match event {
			Event::RedrawRequested(window_id) if window_id == gpu.window().id() => {
				match gpu.render(
					game.camera.pos,
					game.camera.zoom,
					&game.get_object_sprites(),
					&game.get_ui_sprites(),
				) {
					Ok(_) => {}
					Err(wgpu::SurfaceError::Lost) => {
						gpu.resize(&game.system.starfield, gpu.window_size)
					}
					Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
					// All other errors (Outdated, Timeout) should be resolved by the next frame
					Err(e) => eprintln!("{:?}", e),
				}
			}

			Event::MainEventsCleared => {
				game.update();
				gpu.window().request_redraw();
			}

			Event::WindowEvent {
				ref event,
				window_id,
			} if window_id == gpu.window.id() => match event {
				WindowEvent::Focused(state) => {
					game.set_paused(!state);
				}
				WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
				WindowEvent::KeyboardInput {
					input:
						KeyboardInput {
							state,
							virtual_keycode: Some(key),
							..
						},
					..
				} => game.process_key(state, key),
				WindowEvent::MouseInput { state, button, .. } => {
					game.process_click(state, button);
				}
				WindowEvent::MouseWheel { delta, phase, .. } => {
					game.process_scroll(delta, phase);
				}
				WindowEvent::Resized(physical_size) => {
					gpu.resize(&game.system.starfield, *physical_size);
				}
				WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
					gpu.resize(&game.system.starfield, **new_inner_size);
				}
				_ => {}
			},
			_ => {}
		}
	});
}