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package net.amygdalum.testrecorder.values;

import static net.amygdalum.testrecorder.util.Types.baseType;

import java.io.Serializable;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.stream.Stream;

import net.amygdalum.testrecorder.types.SerializedValue;
import net.amygdalum.testrecorder.util.Types;

public abstract class AbstractSerializedValue implements SerializedValue {

	private Class type;

	public AbstractSerializedValue(Class type) {
		assert type == null || type instanceof Serializable;
		this.type = type;
	}

	@Override
	public Type[] getUsedTypes() {
		return new Type[] { type };
	}

	@Override
	public Class getType() {
		return type;
	}

	public Type inferType(Stream candidateTypes, Collection values, Class defaultType) {
		return candidateTypes
			.filter(type -> satisfiesType(type, values))
			.sorted(Types::byMostConcreteGeneric)
			.findFirst()
			.orElse(defaultType);
	}

	public boolean satisfiesType(Type type, SerializedValue value) {
		Class baseType = baseType(type);
		return value.getType() == null
			|| baseType.isAssignableFrom(baseType(value.getType()));
	}

	public boolean satisfiesType(Type type, Collection collection) {
		return collection.stream()
			.allMatch(value -> satisfiesType(type, value));
	}

}