use billy::World;
use eyre::Result;

use std::{
	any::Any,
	cell::RefCell,
	rc::Rc,
};

#[test]
fn create_entity() -> Result<()> {

	let mut world = World::new();
	world.register_component::<Location>();
	world.register_component::<Size>();

	world
		.create_entity()
		.with_component(Location(42.0, 24.0))?
		.with_component(Size(10.0))?;

	Ok(())

}

#[test]
#[allow(clippy::float_cmp)]
fn query_for_entities() -> Result<()> {

	let mut world = World::new();
	world.register_component::<Location>();
	world.register_component::<Size>();

	world
		.create_entity()
		.with_component(Location(42.0, 24.0))?
		.with_component(Size(10.0))?;

	world
		.create_entity()
		.with_component(Size(11.0))?;

	world
		.create_entity()
		.with_component(Location(43.0, 25.0))?;

	world
		.create_entity()
		.with_component(Location(44.0, 26.0))?
		.with_component(Size(12.0))?;

	let query = world
		.query()
		.with_component::<Location>()?
		.with_component::<Size>()?
		.run();

	let locations: &Vec<Rc<RefCell<dyn Any>>> = &query.1[0];
	let sizes: &Vec<Rc<RefCell<dyn Any>>> = &query.1[1];

	assert_eq!(locations.len(), sizes.len());
	assert_eq!(locations.len(), 2);

	let borrowed_first_location = locations[0].borrow();
	let first_location = borrowed_first_location.downcast_ref::<Location>().unwrap();
	assert_eq!(first_location.0, 42.0);

	let borrowed_first_size= sizes[0].borrow();
	let first_size = borrowed_first_size.downcast_ref::<Size>().unwrap();
	assert_eq!(first_size.0, 10.0);

	let borrowed_second_location = locations[1].borrow();
	let second_location = borrowed_second_location.downcast_ref::<Location>().unwrap();
	assert_eq!(second_location.0, 44.0);

	let mut borrowed_second_size= sizes[1].borrow_mut();
	let second_size = borrowed_second_size.downcast_mut::<Size>().unwrap();
	second_size.0 += 1.0;
	assert_eq!(second_size.0, 13.0);

	Ok(())
}

#[test]
fn delete_component_to_entity() -> Result<()> {

	let mut world = World::new();
	world.register_component::<Location>();
	world.register_component::<Size>();

	world
		.create_entity()
		.with_component(Location(10.0, 11.0))?
		.with_component(Size(10.0))?;

	world
		.create_entity()
		.with_component(Location(20.0, 21.0))?
		.with_component(Size(20.0))?;

	world.delete_component_by_entity_id::<Location>(0)?;

	let query = world
		.query()
		.with_component::<Location>()?
		.with_component::<Size>()?
		.run();

	assert_eq!(query.0.len(), 1);
	assert_eq!(query.0[0], 1);

	Ok(())
}

#[test]
fn add_component_to_entity() -> Result<()> {

	let mut world = World::new();
	world.register_component::<Location>();
	world.register_component::<Size>();

	world
		.create_entity()
		.with_component(Location(10.0, 15.0))?;

	world.add_component_by_entity_id(Size(20.0), 0)?;

	let query = world
		.query()
		.with_component::<Location>()?
		.with_component::<Size>()?
		.run();

	assert_eq!(query.0.len(), 1);

	Ok(())
}

#[test]
#[allow(clippy::float_cmp)]
fn deleting_an_entity() -> Result<()> {

	let mut world = World::new();
	world.register_component::<Location>();
	world.register_component::<Size>();

	world
		.create_entity()
		.with_component(Location(10.0, 15.0))?;

	world
		.create_entity()
		.with_component(Location(20.0, 25.0))?;

	world.delete_entity_by_id(0)?;

	let query = world
		.query()
		.with_component::<Location>()?
		.run();

	assert_eq!(query.0.len(), 1);

	let borrowerd_location = query.1[0][0].borrow();
	let location = borrowerd_location.downcast_ref::<Location>().unwrap();

	assert_eq!(location.0, 20.0);

	world
		.create_entity()
		.with_component(Location(30.0, 35.0))?;

	let query = world
		.query()
		.with_component::<Location>()?
		.run();

	let borrowerd_location = query.1[0][0].borrow();
	let location = borrowerd_location.downcast_ref::<Location>().unwrap();

	assert_eq!(location.0, 30.0);

	Ok(())
}

struct Location(pub f32, pub f32);

struct Size(pub f32);