#include "player_interactor.h"
#include "interactable.h"
#include "player_body.h"
#include "player_input.h"

void PlayerInteractor::_bind_methods() {
	ClassDB::bind_method(D_METHOD("pickup_demo_pack"), &self_type::pickup_demo_pack);
	ClassDB::bind_method(D_METHOD("try_use_demo_pack"), &self_type::try_use_demo_pack);
}

void PlayerInteractor::highlight_removed() {
	this->interactable->disconnect("tree_exiting", this->on_highlight_removed);
	this->interactable->set_highlighted(this, false);
	this->interactable = nullptr;
}

void PlayerInteractor::activate() {
	if (interactable != nullptr) {
		interactable->activate(this);
	}
}

void PlayerInteractor::ready() {
	PlayerInput *input{ cast_to<PlayerInput>(get_node(NodePath("%PlayerInput"))) };
	input->connect(PlayerInput::sig_activate, callable_mp(this, &self_type::activate));
}

void PlayerInteractor::process(double delta) {
	Interactable *new_interactable{ nullptr };
	if (is_colliding()) {
		if (Node * hit{ cast_to<Node>(this->get_collider(0)) }) {
			TypedArray<Node> interactables = hit->find_children("*", Interactable::get_class_static());
			new_interactable = interactables.size() > 0 ? cast_to<Interactable>(interactables[0]) : nullptr;
		}
	}
	if (new_interactable != this->interactable) {
		if (this->interactable != nullptr) {
			this->interactable->set_highlighted(this, false);
			this->interactable->disconnect("tree_exiting", this->on_highlight_removed);
		}
		this->interactable = new_interactable;
		if (this->interactable != nullptr) {
			this->interactable->set_highlighted(this, true);
			this->interactable->connect("tree_exiting", this->on_highlight_removed);
		}
	}
}

void PlayerInteractor::_notification(int what) {
	if (Engine::get_singleton()->is_editor_hint()) {
		return;
	}
	switch (what) {
		default:
			return;
		case NOTIFICATION_READY:
			set_process(true);
			ready();
			return;
		case NOTIFICATION_PROCESS:
			process(get_process_delta_time());
			return;
	}
}

PackedStringArray PlayerInteractor::get_configuration_warnings() const {
	PackedStringArray warnings{ super_type::get_configuration_warnings() };
	if (cast_to<PlayerBody>(get_owner()) == nullptr) {
		warnings.push_back("PlayerInteractor should be part of and owned by a PlayerBody node to work properly.");
	}
	if (get_node(NodePath("%PlayerInput")) == nullptr) {
		warnings.push_back("PlayerInteractor should have a node named '%PlayerInput' in the same scene as it");
	}
	return warnings;
}

void PlayerInteractor::pickup_demo_pack() {
	++this->num_demo_packs;
}

bool PlayerInteractor::try_use_demo_pack() {
	if (this->num_demo_packs > 0) {
		--this->num_demo_packs;
		return true;
	}
	return false;
}