/**************************************************************************/
/*  godot_plugin_jni.cpp                                                  */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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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  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
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#include "godot_plugin_jni.h"

#include "api/jni_singleton.h"
#include "jni_utils.h"
#include "string_android.h"

#include "core/config/engine.h"
#include "core/error/error_macros.h"

static HashMap<String, JNISingleton *> jni_singletons;

void unregister_plugins_singletons() {
	for (const KeyValue<String, JNISingleton *> &E : jni_singletons) {
		Engine::get_singleton()->remove_singleton(E.key);

		if (E.value) {
			memdelete(E.value);
		}
	}
	jni_singletons.clear();
}

extern "C" {

JNIEXPORT jboolean JNICALL Java_org_godotengine_godot_plugin_GodotPlugin_nativeRegisterSingleton(JNIEnv *env, jclass clazz, jstring name, jobject obj) {
	String singname = jstring_to_string(name, env);

	ERR_FAIL_COND_V(jni_singletons.has(singname), false);

	JNISingleton *s = (JNISingleton *)ClassDB::instantiate("JNISingleton");
	s->set_instance(env->NewGlobalRef(obj));
	jni_singletons[singname] = s;

	Engine::get_singleton()->add_singleton(Engine::Singleton(singname, s));
	return true;
}

JNIEXPORT void JNICALL Java_org_godotengine_godot_plugin_GodotPlugin_nativeRegisterMethod(JNIEnv *env, jclass clazz, jstring sname, jstring name, jstring ret, jobjectArray args) {
	String singname = jstring_to_string(sname, env);

	ERR_FAIL_COND(!jni_singletons.has(singname));

	JNISingleton *s = jni_singletons.get(singname);

	String mname = jstring_to_string(name, env);
	String retval = jstring_to_string(ret, env);
	Vector<Variant::Type> types;
	String cs = "(";

	int stringCount = env->GetArrayLength(args);

	for (int i = 0; i < stringCount; i++) {
		jstring string = (jstring)env->GetObjectArrayElement(args, i);
		const String rawString = jstring_to_string(string, env);
		types.push_back(get_jni_type(rawString));
		cs += get_jni_sig(rawString);
	}

	cs += ")";
	cs += get_jni_sig(retval);
	jclass cls = env->GetObjectClass(s->get_instance());
	jmethodID mid = env->GetMethodID(cls, mname.ascii().get_data(), cs.ascii().get_data());
	if (!mid) {
		print_line("Failed getting method ID " + mname);
	}

	s->add_method(mname, mid, types, get_jni_type(retval));
}

JNIEXPORT void JNICALL Java_org_godotengine_godot_plugin_GodotPlugin_nativeRegisterSignal(JNIEnv *env, jclass clazz, jstring j_plugin_name, jstring j_signal_name, jobjectArray j_signal_param_types) {
	String singleton_name = jstring_to_string(j_plugin_name, env);

	ERR_FAIL_COND(!jni_singletons.has(singleton_name));

	JNISingleton *singleton = jni_singletons.get(singleton_name);

	String signal_name = jstring_to_string(j_signal_name, env);
	Vector<Variant::Type> types;

	int stringCount = env->GetArrayLength(j_signal_param_types);

	for (int i = 0; i < stringCount; i++) {
		jstring j_signal_param_type = (jstring)env->GetObjectArrayElement(j_signal_param_types, i);
		const String signal_param_type = jstring_to_string(j_signal_param_type, env);
		types.push_back(get_jni_type(signal_param_type));
	}

	singleton->add_signal(signal_name, types);
}

JNIEXPORT void JNICALL Java_org_godotengine_godot_plugin_GodotPlugin_nativeEmitSignal(JNIEnv *env, jclass clazz, jstring j_plugin_name, jstring j_signal_name, jobjectArray j_signal_params) {
	String singleton_name = jstring_to_string(j_plugin_name, env);

	ERR_FAIL_COND(!jni_singletons.has(singleton_name));

	JNISingleton *singleton = jni_singletons.get(singleton_name);

	String signal_name = jstring_to_string(j_signal_name, env);

	int count = env->GetArrayLength(j_signal_params);

	Variant *variant_params = (Variant *)alloca(sizeof(Variant) * count);
	const Variant **args = (const Variant **)alloca(sizeof(Variant *) * count);

	for (int i = 0; i < count; i++) {
		jobject j_param = env->GetObjectArrayElement(j_signal_params, i);
		ERR_FAIL_NULL(j_param);
		memnew_placement(&variant_params[i], Variant(_jobject_to_variant(env, j_param)));
		args[i] = &variant_params[i];
		env->DeleteLocalRef(j_param);
	}

	singleton->emit_signalp(StringName(signal_name), args, count);
}
}