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/*
 * This file is part of "lunisolar-magma".
 *
 * (C) Copyright 2015 Lunisolar (http://lunisolar.eu/).
 *
 * 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 eu.lunisolar.magma.func.function.from;
import javax.annotation.Nonnull; // NOSONAR
import javax.annotation.Nullable; // NOSONAR
import java.util.Comparator; // NOSONAR
import java.util.Objects; // NOSONAR
import eu.lunisolar.magma.basics.*; //NOSONAR
import eu.lunisolar.magma.basics.builder.*; // NOSONAR
import eu.lunisolar.magma.basics.exceptions.*; // NOSONAR
import eu.lunisolar.magma.basics.meta.*; // NOSONAR
import eu.lunisolar.magma.basics.meta.functional.*; // NOSONAR
import eu.lunisolar.magma.basics.meta.functional.type.*; // NOSONAR
import eu.lunisolar.magma.basics.meta.functional.domain.*; // NOSONAR
import eu.lunisolar.magma.func.*; // NOSONAR
import eu.lunisolar.magma.func.operator.unary.*; // NOSONAR
import eu.lunisolar.magma.func.operator.binary.*; // NOSONAR
import eu.lunisolar.magma.func.operator.ternary.*; // NOSONAR
import eu.lunisolar.magma.func.function.*; // NOSONAR
import eu.lunisolar.magma.func.function.from.*; // NOSONAR
import eu.lunisolar.magma.func.function.to.*; // NOSONAR
import eu.lunisolar.magma.func.function.conversion.*; // NOSONAR
import eu.lunisolar.magma.func.predicate.*; // NOSONAR
import eu.lunisolar.magma.func.supplier.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.primitives.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.primitives.bi.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.primitives.tri.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.primitives.obj.*; // NOSONAR
import eu.lunisolar.magma.func.action.*; // NOSONAR

/**
 * Non-throwing functional interface (lambda) LObjDoubleFunction for Java 8.
 *
 * Type: function
 *
 * Domain (lvl: 2): T t, double d
 *
 * Co-domain: R
 *
 * @see LObjDoubleFunctionX
 */
@FunctionalInterface
@SuppressWarnings("UnusedDeclaration")
public interface LObjDoubleFunction extends LObjDoubleFunctionX, MetaFunction, MetaInterface.NonThrowing { // NOSONAR

	static final String DESCRIPTION = "LObjDoubleFunction: R doApply(T t, double d)";

	@Nullable
	R doApply(T t, double d);

	/** Function call that handles exceptions by always nesting checked exceptions and propagating the otheres as is. */
	default R nestingDoApply(T t, double d) {
		return this.doApply(t, d);
	}

	/** Function call that handles exceptions by always propagating them as is even when they are undeclared checked ones. */
	default R shovingDoApply(T t, double d) {
		return this.doApply(t, d);
	}

	static final LSupplier NULL_VALUE_MESSAGE_SUPPLIER = () -> "Evaluated value by nonNullDoApply() method cannot be null (" + DESCRIPTION + ").";

	/** Function call that ensures the result is not null */
	@Nonnull
	default R nonNullDoApply(T t, double d) {
		return Null.requireNonNull(doApply(t, d), NULL_VALUE_MESSAGE_SUPPLIER);
	}

	/** Returns description of the functional interface. */
	@Nonnull
	default String functionalInterfaceDescription() {
		return LObjDoubleFunction.DESCRIPTION;
	}

	/** Captures arguments but delays the evaluation. */
	default LSupplier captureObjDoubleFunc(T t, double d) {
		return () -> this.doApply(t, d);
	}

	/** Creates function that always returns the same value. */
	static  LObjDoubleFunction constant(R r) {
		return (t, d) -> r;
	}

	/** Captures single parameter function into this interface where only 1st parameter will be used. */
	@Nonnull
	static  LObjDoubleFunction apply1st(@Nonnull LFunction func) {
		return (t, d) -> func.doApply(t);
	}

	/** Captures single parameter function into this interface where only 2nd parameter will be used. */
	@Nonnull
	static  LObjDoubleFunction apply2nd(@Nonnull LDoubleFunction func) {
		return (t, d) -> func.doApply(d);
	}

	/** Convenient method in case lambda expression is ambiguous for the compiler (that might happen for overloaded methods accepting different interfaces). */
	@Nonnull
	static  LObjDoubleFunction l(final @Nonnull LObjDoubleFunction lambda) {
		Null.nonNullArg(lambda, "lambda");
		return lambda;
	}

	// 

	/** Wraps opposite (throwing vs non-throwing) instance. */
	@Nonnull
	static  LObjDoubleFunction wrap(final @Nonnull LObjDoubleFunctionX other) {
		return other::nestingDoApply;
	}

	// 

	// 

	/** Allows to manipulate the domain of the function. */
	@Nonnull
	default  LObjDoubleFunction objDoubleFuncComposeDouble(@Nonnull final LFunction before1, @Nonnull final LDoubleUnaryOperator before2) {
		Null.nonNullArg(before1, "before1");
		Null.nonNullArg(before2, "before2");
		return (final V1 v1, final double v2) -> this.doApply(before1.doApply(v1), before2.doApplyAsDouble(v2));
	}

	/** Allows to manipulate the domain of the function. */
	@Nonnull
	default  LBiFunction objDoubleFuncCompose(@Nonnull final LFunction before1, @Nonnull final LToDoubleFunction before2) {
		Null.nonNullArg(before1, "before1");
		Null.nonNullArg(before2, "before2");
		return (V1 v1, V2 v2) -> this.doApply(before1.doApply(v1), before2.doApplyAsDouble(v2));
	}

	// 

	// 

	/** Combines two functions together in a order. */
	@Nonnull
	default  LObjDoubleFunction then(@Nonnull LFunction after) {
		Null.nonNullArg(after, "after");
		return (T t, double d) -> after.doApply(this.doApply(t, d));
	}

	/** Combines two functions together in a order. */
	@Nonnull
	default LObjDoubleConsumer then(@Nonnull LConsumer after) {
		Null.nonNullArg(after, "after");
		return (T t, double d) -> after.doAccept(this.doApply(t, d));
	}

	// 
	// 

	/** Converts to non-throwing variant (if required). */
	@Nonnull
	default LObjDoubleFunction nestingObjDoubleFunc() {
		return this;
	}

	/** Converts to throwing variant (RuntimeException). */
	@Nonnull
	default LObjDoubleFunctionX nestingObjDoubleFuncX() {
		return this;
	}

	/** Converts to non-throwing variant that will propagate checked exception as it would be unchecked - there is no exception wrapping involved (at least not here). */
	default LObjDoubleFunction shovingObjDoubleFunc() {
		return this;
	}

	/** Converts to throwing variant (RuntimeException) that will propagate checked exception as it would be unchecked - there is no exception wrapping involved (at least not here). */
	default LObjDoubleFunctionX shovingObjDoubleFuncX() {
		return this;
	}

	// 

	/** Converts to function that makes sure that the result is not null. */
	@Nonnull
	default LObjDoubleFunction nonNullObjDoubleFunc() {
		return this::nonNullDoApply;
	}

}




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