/**************************************************************************/
/*  openxr_dpad_binding_extension.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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#include "openxr_dpad_binding_extension.h"
#include "../openxr_api.h"
#include "core/math/math_funcs.h"

// Implementation for:
// https://registry.khronos.org/OpenXR/specs/1.1/html/xrspec.html#XR_EXT_dpad_binding

///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenXRDPadBindingExtension

OpenXRDPadBindingExtension *OpenXRDPadBindingExtension::singleton = nullptr;

OpenXRDPadBindingExtension *OpenXRDPadBindingExtension::get_singleton() {
	return singleton;
}

OpenXRDPadBindingExtension::OpenXRDPadBindingExtension() {
	singleton = this;
}

OpenXRDPadBindingExtension::~OpenXRDPadBindingExtension() {
	singleton = nullptr;
}

HashMap<String, bool *> OpenXRDPadBindingExtension::get_requested_extensions() {
	HashMap<String, bool *> request_extensions;

	// Note, we're dependent on the binding modifier extension, this may be requested by multiple extension wrappers.
	request_extensions[XR_KHR_BINDING_MODIFICATION_EXTENSION_NAME] = &binding_modifier_ext;
	request_extensions[XR_EXT_DPAD_BINDING_EXTENSION_NAME] = &dpad_binding_ext;

	return request_extensions;
}

bool OpenXRDPadBindingExtension::is_available() {
	return binding_modifier_ext && dpad_binding_ext;
}

///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenXRDpadBindingModifier

void OpenXRDpadBindingModifier::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_action_set", "action_set"), &OpenXRDpadBindingModifier::set_action_set);
	ClassDB::bind_method(D_METHOD("get_action_set"), &OpenXRDpadBindingModifier::get_action_set);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "action_set", PROPERTY_HINT_RESOURCE_TYPE, "OpenXRActionSet"), "set_action_set", "get_action_set");

	ClassDB::bind_method(D_METHOD("set_input_path", "input_path"), &OpenXRDpadBindingModifier::set_input_path);
	ClassDB::bind_method(D_METHOD("get_input_path"), &OpenXRDpadBindingModifier::get_input_path);
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "input_path", PROPERTY_HINT_TYPE_STRING, "binding_path"), "set_input_path", "get_input_path");

	ClassDB::bind_method(D_METHOD("set_threshold", "threshold"), &OpenXRDpadBindingModifier::set_threshold);
	ClassDB::bind_method(D_METHOD("get_threshold"), &OpenXRDpadBindingModifier::get_threshold);
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "threshold", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_threshold", "get_threshold");

	ClassDB::bind_method(D_METHOD("set_threshold_released", "threshold_released"), &OpenXRDpadBindingModifier::set_threshold_released);
	ClassDB::bind_method(D_METHOD("get_threshold_released"), &OpenXRDpadBindingModifier::get_threshold_released);
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "threshold_released", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_threshold_released", "get_threshold_released");

	ClassDB::bind_method(D_METHOD("set_center_region", "center_region"), &OpenXRDpadBindingModifier::set_center_region);
	ClassDB::bind_method(D_METHOD("get_center_region"), &OpenXRDpadBindingModifier::get_center_region);
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "center_region", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_center_region", "get_center_region");

	ClassDB::bind_method(D_METHOD("set_wedge_angle", "wedge_angle"), &OpenXRDpadBindingModifier::set_wedge_angle);
	ClassDB::bind_method(D_METHOD("get_wedge_angle"), &OpenXRDpadBindingModifier::get_wedge_angle);
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "wedge_angle", PROPERTY_HINT_RANGE, "1.0,180.0,0.1,radians_as_degrees"), "set_wedge_angle", "get_wedge_angle");

	ClassDB::bind_method(D_METHOD("set_is_sticky", "is_sticky"), &OpenXRDpadBindingModifier::set_is_sticky);
	ClassDB::bind_method(D_METHOD("get_is_sticky"), &OpenXRDpadBindingModifier::get_is_sticky);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "is_sticky"), "set_is_sticky", "get_is_sticky");

	ClassDB::bind_method(D_METHOD("set_on_haptic", "haptic"), &OpenXRDpadBindingModifier::set_on_haptic);
	ClassDB::bind_method(D_METHOD("get_on_haptic"), &OpenXRDpadBindingModifier::get_on_haptic);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "on_haptic", PROPERTY_HINT_RESOURCE_TYPE, "OpenXRHapticBase"), "set_on_haptic", "get_on_haptic");

	ClassDB::bind_method(D_METHOD("set_off_haptic", "haptic"), &OpenXRDpadBindingModifier::set_off_haptic);
	ClassDB::bind_method(D_METHOD("get_off_haptic"), &OpenXRDpadBindingModifier::get_off_haptic);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "off_haptic", PROPERTY_HINT_RESOURCE_TYPE, "OpenXRHapticBase"), "set_off_haptic", "get_off_haptic");
}

OpenXRDpadBindingModifier::OpenXRDpadBindingModifier() {
	ERR_FAIL_COND(dpad_bindings_data.resize_zeroed(sizeof(XrInteractionProfileDpadBindingEXT)) != OK);
	dpad_bindings = (XrInteractionProfileDpadBindingEXT *)dpad_bindings_data.ptrw();

	dpad_bindings->type = XR_TYPE_INTERACTION_PROFILE_DPAD_BINDING_EXT;
	dpad_bindings->next = nullptr;

	dpad_bindings->forceThreshold = 0.6;
	dpad_bindings->forceThresholdReleased = 0.4;
	dpad_bindings->centerRegion = 0.1;
	dpad_bindings->wedgeAngle = Math::deg_to_rad(90.0);
	dpad_bindings->isSticky = false;
}

void OpenXRDpadBindingModifier::set_action_set(const Ref<OpenXRActionSet> p_action_set) {
	action_set = p_action_set;
}

Ref<OpenXRActionSet> OpenXRDpadBindingModifier::get_action_set() const {
	return action_set;
}

void OpenXRDpadBindingModifier::set_input_path(const String &p_input_path) {
	input_path = p_input_path;
	emit_changed();
}

String OpenXRDpadBindingModifier::get_input_path() const {
	return input_path;
}

void OpenXRDpadBindingModifier::set_threshold(float p_threshold) {
	ERR_FAIL_NULL(dpad_bindings);
	ERR_FAIL_COND(p_threshold < 0.0 || p_threshold > 1.0);

	dpad_bindings->forceThreshold = p_threshold;
	emit_changed();
}

float OpenXRDpadBindingModifier::get_threshold() const {
	ERR_FAIL_NULL_V(dpad_bindings, 0.0);
	return dpad_bindings->forceThreshold;
}

void OpenXRDpadBindingModifier::set_threshold_released(float p_threshold) {
	ERR_FAIL_NULL(dpad_bindings);
	ERR_FAIL_COND(p_threshold < 0.0 || p_threshold > 1.0);

	dpad_bindings->forceThresholdReleased = p_threshold;
	emit_changed();
}

float OpenXRDpadBindingModifier::get_threshold_released() const {
	ERR_FAIL_NULL_V(dpad_bindings, 0.0);
	return dpad_bindings->forceThresholdReleased;
}

void OpenXRDpadBindingModifier::set_center_region(float p_center_region) {
	ERR_FAIL_NULL(dpad_bindings);
	ERR_FAIL_COND(p_center_region < 0.0 || p_center_region > 1.0);

	dpad_bindings->centerRegion = p_center_region;
	emit_changed();
}

float OpenXRDpadBindingModifier::get_center_region() const {
	ERR_FAIL_NULL_V(dpad_bindings, 0.0);
	return dpad_bindings->centerRegion;
}

void OpenXRDpadBindingModifier::set_wedge_angle(float p_wedge_angle) {
	ERR_FAIL_NULL(dpad_bindings);
	dpad_bindings->wedgeAngle = p_wedge_angle;
	emit_changed();
}

float OpenXRDpadBindingModifier::get_wedge_angle() const {
	ERR_FAIL_NULL_V(dpad_bindings, 0.0);
	return dpad_bindings->wedgeAngle;
}

void OpenXRDpadBindingModifier::set_wedge_angle_deg(float p_wedge_angle) {
	ERR_FAIL_NULL(dpad_bindings);
	dpad_bindings->wedgeAngle = Math::deg_to_rad(p_wedge_angle);
	emit_changed();
}

float OpenXRDpadBindingModifier::get_wedge_angle_deg() const {
	ERR_FAIL_NULL_V(dpad_bindings, 0.0);
	return Math::rad_to_deg(dpad_bindings->wedgeAngle);
}

void OpenXRDpadBindingModifier::set_is_sticky(bool p_sticky) {
	ERR_FAIL_NULL(dpad_bindings);
	dpad_bindings->isSticky = p_sticky;
	emit_changed();
}

bool OpenXRDpadBindingModifier::get_is_sticky() const {
	ERR_FAIL_NULL_V(dpad_bindings, false);
	return dpad_bindings->isSticky;
}

void OpenXRDpadBindingModifier::set_on_haptic(const Ref<OpenXRHapticBase> &p_haptic) {
	on_haptic = p_haptic;
	emit_changed();
}

Ref<OpenXRHapticBase> OpenXRDpadBindingModifier::get_on_haptic() const {
	return on_haptic;
}

void OpenXRDpadBindingModifier::set_off_haptic(const Ref<OpenXRHapticBase> &p_haptic) {
	off_haptic = p_haptic;
	emit_changed();
}

Ref<OpenXRHapticBase> OpenXRDpadBindingModifier::get_off_haptic() const {
	return off_haptic;
}

PackedByteArray OpenXRDpadBindingModifier::get_ip_modification() {
	ERR_FAIL_NULL_V(dpad_bindings, PackedByteArray());

	OpenXRAPI *openxr_api = OpenXRAPI::get_singleton();
	ERR_FAIL_NULL_V(openxr_api, PackedByteArray());

	OpenXRDPadBindingExtension *dpad_binding_ext = OpenXRDPadBindingExtension::get_singleton();
	if (!dpad_binding_ext || !dpad_binding_ext->is_available()) {
		// Extension not enabled!
		WARN_PRINT("DPad binding extension is not enabled or available.");
		return PackedByteArray();
	}

	dpad_bindings->binding = openxr_api->get_xr_path(input_path);
	ERR_FAIL_COND_V(dpad_bindings->binding == XR_NULL_PATH, PackedByteArray());

	// Get our action set
	ERR_FAIL_COND_V(action_set.is_null(), PackedByteArray());
	RID action_set_rid = openxr_api->find_action_set(action_set->get_name());
	ERR_FAIL_COND_V(!action_set_rid.is_valid(), PackedByteArray());
	dpad_bindings->actionSet = openxr_api->action_set_get_handle(action_set_rid);

	// These are set already:
	// - forceThreshold
	// - forceThresholdReleased
	// - centerRegion
	// - wedgeAngle
	// - isSticky

	if (on_haptic.is_valid()) {
		dpad_bindings->onHaptic = on_haptic->get_xr_structure();
	} else {
		dpad_bindings->onHaptic = nullptr;
	}

	if (off_haptic.is_valid()) {
		dpad_bindings->offHaptic = off_haptic->get_xr_structure();
	} else {
		dpad_bindings->offHaptic = nullptr;
	}

	return dpad_bindings_data;
}