package ffi

/*
#cgo CFLAGS: -I ${SRCDIR}/lib
#cgo LDFLAGS: -L ${SRCDIR}/lib -l ffi_wrapper
#include "ffi-wrapper.h"
#include <stdlib.h>
*/
import "C"

// Circles
type Circle struct {
	cptr *C.Circle
}

func NewCircle(x float64, y float64, rad float64) Circle {
	return Circle{
		cptr: C.new_circle(C.double(x), C.double(y), C.double(rad)),
	}
}

func (c *Circle) UpdatePos(x float64, y float64) {
	c.cptr.x = C.double(x)
	c.cptr.y = C.double(y)
}

func DestroyCircle(circle Circle) {
	if circle.cptr == nil {
		return
	}

	C.destroy_circle(circle.cptr)
}

func (c *Circle) GetPos() (float64, float64) {
	return float64(c.cptr.x), float64(c.cptr.y)
}

// Bullets
type Bullet struct {
	cptr *C.Bullet
}

func NewLinearBullet(tick int64, spawnX float64, spawnY float64, radius float64, velX float64, velY float64) Bullet {
	return Bullet{
		cptr: C.new_bullet(
			C.uint8_t(0),
			C.int64_t(tick),
			C.double(spawnX),
			C.double(spawnY),
			C.double(radius),
			C.double(velX),
			C.double(velY),
		),
	}
}

func DestroyBullet(bullet Bullet) {
	if bullet.cptr == nil {
		return
	}

	C.destroy_bullet(bullet.cptr)
}

func (b *Bullet) BeyondKillBoundary(tick int64) bool {
	return bool(C.bullet_beyond_kill_boundary(b.cptr, C.int64_t(tick)))
}

func (b *Bullet) CollidesWith(circle Circle, tick int64) bool {
	return bool(C.bullet_collides_with(b.cptr, C.int64_t(tick), circle.cptr))
}

func (b *Bullet) GetPos(tick int64) (float64, float64) {
	var x, y C.double
	C.bullet_get_current_pos(b.cptr, C.int64_t(tick), &x, &y)

	return float64(x), float64(y)
}