/**************************************************************************/
/*  arvr_interface.cpp                                                    */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* Permission is hereby granted, free of charge, to any person obtaining  */
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#include "arvr_interface.h"

void ARVRInterface::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_name"), &ARVRInterface::get_name);
	ClassDB::bind_method(D_METHOD("get_capabilities"), &ARVRInterface::get_capabilities);

	ClassDB::bind_method(D_METHOD("is_primary"), &ARVRInterface::is_primary);
	ClassDB::bind_method(D_METHOD("set_is_primary", "enable"), &ARVRInterface::set_is_primary);

	ClassDB::bind_method(D_METHOD("is_initialized"), &ARVRInterface::is_initialized);
	ClassDB::bind_method(D_METHOD("set_is_initialized", "initialized"), &ARVRInterface::set_is_initialized);
	ClassDB::bind_method(D_METHOD("initialize"), &ARVRInterface::initialize);
	ClassDB::bind_method(D_METHOD("uninitialize"), &ARVRInterface::uninitialize);

	ClassDB::bind_method(D_METHOD("get_tracking_status"), &ARVRInterface::get_tracking_status);

	ClassDB::bind_method(D_METHOD("get_render_targetsize"), &ARVRInterface::get_render_targetsize);
	ClassDB::bind_method(D_METHOD("is_stereo"), &ARVRInterface::is_stereo);
	ClassDB::bind_method(D_METHOD("get_transform_for_eye", "eye", "transform"), &ARVRInterface::get_transform_for_eye);

	ADD_GROUP("Interface", "interface_");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "interface_is_primary"), "set_is_primary", "is_primary");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "interface_is_initialized"), "set_is_initialized", "is_initialized");

	// we don't have any properties specific to VR yet....

	// but we do have properties specific to AR....
	ClassDB::bind_method(D_METHOD("get_anchor_detection_is_enabled"), &ARVRInterface::get_anchor_detection_is_enabled);
	ClassDB::bind_method(D_METHOD("set_anchor_detection_is_enabled", "enable"), &ARVRInterface::set_anchor_detection_is_enabled);
	ClassDB::bind_method(D_METHOD("get_camera_feed_id"), &ARVRInterface::get_camera_feed_id);

	ADD_GROUP("AR", "ar_");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "ar_is_anchor_detection_enabled"), "set_anchor_detection_is_enabled", "get_anchor_detection_is_enabled");

	BIND_ENUM_CONSTANT(ARVR_NONE);
	BIND_ENUM_CONSTANT(ARVR_MONO);
	BIND_ENUM_CONSTANT(ARVR_STEREO);
	BIND_ENUM_CONSTANT(ARVR_AR);
	BIND_ENUM_CONSTANT(ARVR_EXTERNAL);

	BIND_ENUM_CONSTANT(EYE_MONO);
	BIND_ENUM_CONSTANT(EYE_LEFT);
	BIND_ENUM_CONSTANT(EYE_RIGHT);

	BIND_ENUM_CONSTANT(ARVR_NORMAL_TRACKING);
	BIND_ENUM_CONSTANT(ARVR_EXCESSIVE_MOTION);
	BIND_ENUM_CONSTANT(ARVR_INSUFFICIENT_FEATURES);
	BIND_ENUM_CONSTANT(ARVR_UNKNOWN_TRACKING);
	BIND_ENUM_CONSTANT(ARVR_NOT_TRACKING);
};

StringName ARVRInterface::get_name() const {
	return "Unknown";
};

bool ARVRInterface::is_primary() {
	ARVRServer *arvr_server = ARVRServer::get_singleton();
	ERR_FAIL_NULL_V(arvr_server, false);

	return arvr_server->get_primary_interface() == this;
};

void ARVRInterface::set_is_primary(bool p_is_primary) {
	ARVRServer *arvr_server = ARVRServer::get_singleton();
	ERR_FAIL_NULL(arvr_server);

	if (p_is_primary) {
		ERR_FAIL_COND(!is_initialized());

		arvr_server->set_primary_interface(this);
	} else {
		arvr_server->clear_primary_interface_if(this);
	};
};

void ARVRInterface::set_is_initialized(bool p_initialized) {
	if (p_initialized) {
		if (!is_initialized()) {
			initialize();
		};
	} else {
		if (is_initialized()) {
			uninitialize();
		};
	};
};

ARVRInterface::Tracking_status ARVRInterface::get_tracking_status() const {
	return tracking_state;
};

ARVRInterface::ARVRInterface() {
	tracking_state = ARVR_UNKNOWN_TRACKING;
};

ARVRInterface::~ARVRInterface(){};

// optional render to external texture which enhances performance on those platforms that require us to submit our end result into special textures.
unsigned int ARVRInterface::get_external_texture_for_eye(ARVRInterface::Eyes p_eye) {
	return 0;
};

// optional render to external depth texture which enhances performance on those platforms that require us to submit our end result into special textures.
unsigned int ARVRInterface::get_external_depth_for_eye(ARVRInterface::Eyes p_eye) {
	return 0;
};

/** these will only be implemented on AR interfaces, so we want dummies for VR **/
bool ARVRInterface::get_anchor_detection_is_enabled() const {
	return false;
};

void ARVRInterface::set_anchor_detection_is_enabled(bool p_enable){
	// don't do anything here, this needs to be implemented on AR interface to enable/disable things like plane detection etc.
};

int ARVRInterface::get_camera_feed_id() {
	// don't do anything here, this needs to be implemented on AR interface to enable/disable things like plane detection etc.

	return 0;
};
