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/*
 * Copyright 2024 REGnosys
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.regnosys.rosetta.tests.util;

import java.util.List;
import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Collectors;

import com.regnosys.rosetta.interpreter.RosettaBooleanValue;
import com.regnosys.rosetta.interpreter.RosettaNumberValue;
import com.regnosys.rosetta.interpreter.RosettaStringValue;
import com.regnosys.rosetta.interpreter.RosettaValue;
import com.rosetta.model.lib.RosettaNumber;

public class RosettaValueHelper {
	private  Optional tryCast(List list, Class clazz, Function, RosettaValue> construct) {
		if (list.stream().allMatch(i -> clazz.isInstance(i))) {
			return Optional.of(construct.apply(list.stream().map(i -> clazz.cast(i)).collect(Collectors.toList())));
		}
		return Optional.empty();
	}
	public RosettaValue toValue(Object obj) {
		if (obj instanceof RosettaValue) {
			return (RosettaValue)obj;
		} else if (obj instanceof List) {
			List list = (List)obj;
			if (list.isEmpty()) {
				return RosettaValue.empty();
			} else {
				return tryCast(list, Boolean.class, RosettaBooleanValue::new)
						.or(() -> tryCast(list, RosettaNumber.class, RosettaNumberValue::new))
						.or(() -> tryCast(list, Integer.class, ints -> new RosettaNumberValue(ints.stream().map(i -> RosettaNumber.valueOf(i)).collect(Collectors.toList()))))
						.or(() -> tryCast(list, String.class, RosettaStringValue::new))
						.orElseThrow(() -> new IllegalArgumentException("Unsupported Rosetta value " + obj));
			}
		} else {
			return toValue(List.of(obj));
		}
	}
}