package tree

import (
	"github.com/Zyko0/go-sdl3/sdl"
	"ponger/ecs"
	"ponger/events"
	"ponger/render"
)

func Process(root ecs.IsGameObject, delta events.Delta, renderer *sdl.Renderer) error {
	evs, err := events.Poll(delta)
	if err != nil {
		return err
	}
	ParseRecursive(root, delta, renderer, evs...)
	return nil
}

func ParseRecursive(current ecs.IsGameObject, delta events.Delta, renderer *sdl.Renderer, evs ...any) {
	ParseSingle(current, delta, renderer, evs...)
	for _, c := range current.GO().Children {
		if c == nil {
			continue
		}
		ParseSingle(c, delta, renderer, evs...)
	}
	for _, c := range current.GO().Components {
		if c == nil {
			continue
		}
		c.Process(delta, current.GO())
		ParseSingle(c, delta, renderer, evs...)
	}
}

func ParseSingle(obj any, delta events.Delta, renderer *sdl.Renderer, evs ...any) {
	if impl, ok := obj.(events.WindowChangeHandler); ok {
		for _, e := range events.OfType[events.WindowChange](evs...) {
			impl.ProcessWindowChange(e)
		}
	}
	if impl, ok := obj.(events.MouseMotionHandler); ok {
		for _, e := range events.OfType[events.MouseMotion](evs...) {
			impl.ProcessMouseMotion(e)
		}
	}
	if impl, ok := obj.(events.MousePressHandler); ok {
		for _, e := range events.OfType[events.MousePress](evs...) {
			impl.ProcessMousePress(e)
		}
	}
	if impl, ok := obj.(render.Renders); ok {
		impl.Render(renderer)
	}
}