#include "terrain_modifier.h"
#include "core/config/engine.h"
#include "core/variant/variant.h"
#include "scene/main/node.h"
#include "terrain/terrain.h"

String TerrainModifier::sig_terrain_changed{ "terrain_changed" };

void TerrainModifier::_bind_methods() {
	ADD_SIGNAL(MethodInfo(sig_terrain_changed, PropertyInfo(Variant::OBJECT, "terrain", PROPERTY_HINT_NODE_TYPE, "Terrain")));
}

void TerrainModifier::_notification(int what) {
	switch (what) {
		default:
			return;
		case NOTIFICATION_ENTER_TREE:
			if (Engine::get_singleton()->is_editor_hint()) {
				set_notify_transform(true);
			}
			this->thread_safe_global_position = get_global_position();
			return;
		case NOTIFICATION_TRANSFORM_CHANGED:
			this->thread_safe_global_position = get_global_position();
			return;
	}
}

void TerrainModifier::push_changed(Rect2 area) {
	if (this->terrain) {
		this->terrain->push_changed(area);
	}
}

float TerrainModifier::evaluate_at(Vector2 world_coordinate, float before) {
	Vector3 const global_position{ get_thread_safe_global_position() };
	return global_position.y;
}

void TerrainModifier::set_bounds(Rect2 bounds) {
	if (this->bounds != bounds) {
		push_changed(bounds);
		push_changed(this->bounds);
		this->bounds = bounds;
	}
}

Rect2 TerrainModifier::get_bounds() const {
	return this->bounds;
}

Vector3 TerrainModifier::get_thread_safe_global_position() const {
	return this->thread_safe_global_position;
}