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/*
 * This file is part of "lunisolar-magma".
 *
 * (C) Copyright 2014-2019 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.predicate;

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.aType.*; // 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.IA;
import eu.lunisolar.magma.func.SA;
import eu.lunisolar.magma.func.*; // NOSONAR
import eu.lunisolar.magma.func.tuple.*; // NOSONAR
import java.util.function.*; // NOSONAR
import java.util.*; // NOSONAR
import java.lang.reflect.*;

import eu.lunisolar.magma.func.action.*; // 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.obj.*; // NOSONAR
import eu.lunisolar.magma.func.consumer.primitives.tri.*; // NOSONAR
import eu.lunisolar.magma.func.function.*; // NOSONAR
import eu.lunisolar.magma.func.function.conversion.*; // NOSONAR
import eu.lunisolar.magma.func.function.from.*; // NOSONAR
import eu.lunisolar.magma.func.function.to.*; // NOSONAR
import eu.lunisolar.magma.func.operator.binary.*; // NOSONAR
import eu.lunisolar.magma.func.operator.ternary.*; // NOSONAR
import eu.lunisolar.magma.func.operator.unary.*; // NOSONAR
import eu.lunisolar.magma.func.predicate.*; // NOSONAR
import eu.lunisolar.magma.func.supplier.*; // NOSONAR

/**
 * Non-throwing functional interface (lambda) LBiFltPredicate for Java 8.
 *
 * Type: predicate
 *
 * Domain (lvl: 2): float a1,float a2
 *
 * Co-domain: boolean
 *
 */
@FunctionalInterface
@SuppressWarnings("UnusedDeclaration")
public interface LBiFltPredicate extends MetaPredicate, MetaInterface.NonThrowing, Codomain, Domain2 { // NOSONAR

	String DESCRIPTION = "LBiFltPredicate: boolean test(float a1,float a2)";

	// boolean test(float a1,float a2) ;
	default boolean test(float a1, float a2) {
		// return nestingTest(a1,a2);
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handling.nestCheckedAndThrow(e);
		}
	}

	/**
	 * Implement this, but call test(float a1,float a2)
	 */
	boolean testX(float a1, float a2) throws Throwable;

	default boolean tupleTest(LFltPair args) {
		return test(args.first(), args.second());
	}

	/** Function call that handles exceptions according to the instructions. */
	default boolean handlingTest(float a1, float a2, HandlingInstructions handling) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handler.handleOrNest(e, handling);
		}
	}

	default LBiFltPredicate handling(HandlingInstructions handling) {
		return (a1, a2) -> handlingTest(a1, a2, handling);
	}

	default boolean test(float a1, float a2, @Nonnull ExWMF exF, @Nonnull String newMessage, @Nullable Object... messageParams) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handling.wrap(e, exF, newMessage, messageParams);
		}
	}

	default LBiFltPredicate trying(@Nonnull ExWMF exF, @Nonnull String newMessage, @Nullable Object... messageParams) {
		return (a1, a2) -> test(a1, a2, exF, newMessage, messageParams);
	}

	default boolean test(float a1, float a2, @Nonnull ExWF exF) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handling.wrap(e, exF);
		}
	}

	default LBiFltPredicate trying(@Nonnull ExWF exF) {
		return (a1, a2) -> test(a1, a2, exF);
	}

	default boolean testThen(float a1, float a2, @Nonnull LPredicate handler) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			Handling.handleErrors(e);
			return handler.test(e);
		}
	}

	default LBiFltPredicate tryingThen(@Nonnull LPredicate handler) {
		return (a1, a2) -> testThen(a1, a2, handler);
	}

	/** Function call that handles exceptions by always nesting checked exceptions and propagating the others as is. */
	default boolean nestingTest(float a1, float a2) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handling.nestCheckedAndThrow(e);
		}
	}

	/** Function call that handles exceptions by always propagating them as is, even when they are undeclared checked ones. */
	default boolean shovingTest(float a1, float a2) {
		try {
			return this.testX(a1, a2);
		} catch (Throwable e) { // NOSONAR
			throw Handling.shoveIt(e);
		}
	}

	static boolean handlingTest(float a1, float a2, LBiFltPredicate func, HandlingInstructions handling) { // <-
		Null.nonNullArg(func, "func");
		return func.handlingTest(a1, a2, handling);
	}

	static boolean tryTest(float a1, float a2, LBiFltPredicate func) {
		Null.nonNullArg(func, "func");
		return func.nestingTest(a1, a2);
	}

	static boolean tryTest(float a1, float a2, LBiFltPredicate func, @Nonnull ExWMF exF, @Nonnull String newMessage, @Nullable Object... messageParams) {
		Null.nonNullArg(func, "func");
		return func.test(a1, a2, exF, newMessage, messageParams);
	}

	static boolean tryTest(float a1, float a2, LBiFltPredicate func, @Nonnull ExWF exF) {
		Null.nonNullArg(func, "func");
		return func.test(a1, a2, exF);
	}

	static boolean tryTestThen(float a1, float a2, LBiFltPredicate func, @Nonnull LPredicate handler) {
		Null.nonNullArg(func, "func");
		return func.testThen(a1, a2, handler);
	}

	default boolean failSafeTest(float a1, float a2, @Nonnull LBiFltPredicate failSafe) {
		try {
			return test(a1, a2);
		} catch (Throwable e) { // NOSONAR
			Handling.handleErrors(e);
			return failSafe.test(a1, a2);
		}
	}

	static boolean failSafeTest(float a1, float a2, LBiFltPredicate func, @Nonnull LBiFltPredicate failSafe) {
		Null.nonNullArg(failSafe, "failSafe");
		if (func == null) {
			return failSafe.test(a1, a2);
		} else {
			return func.failSafeTest(a1, a2, failSafe);
		}
	}

	static LBiFltPredicate failSafe(LBiFltPredicate func, @Nonnull LBiFltPredicate failSafe) {
		Null.nonNullArg(failSafe, "failSafe");
		return (a1, a2) -> failSafeTest(a1, a2, func, failSafe);
	}

	default boolean doIf(float a1, float a2, LAction action) {
		Null.nonNullArg(action, "action");
		if (test(a1, a2)) {
			action.execute();
			return true;
		} else {
			return false;
		}
	}

	static boolean doIf(float a1, float a2, @Nonnull LBiFltPredicate predicate, @Nonnull LAction action) {
		Null.nonNullArg(predicate, "predicate");
		return predicate.doIf(a1, a2, action);
	}

	static boolean doIf(float a1, float a2, @Nonnull LBiFltPredicate predicate, @Nonnull LBiFltConsumer consumer) {
		Null.nonNullArg(predicate, "predicate");
		return predicate.doIf(a1, a2, consumer);
	}

	default boolean doIf(float a1, float a2, @Nonnull LBiFltConsumer consumer) {
		Null.nonNullArg(consumer, "consumer");
		if (test(a1, a2)) {
			consumer.accept(a1, a2);
			return true;
		} else {
			return false;
		}
	}

	static void throwIf(float a1, float a2, LBiFltPredicate pred, ExMF factory, @Nonnull String newMessage, @Nullable Object... messageParams) {
		if (pred.test(a1, a2)) {
			throw Handling.create(factory, newMessage, messageParams);
		}
	}

	static void throwIfNot(float a1, float a2, LBiFltPredicate pred, ExMF factory, @Nonnull String newMessage, @Nullable Object... messageParams) {
		if (!pred.test(a1, a2)) {
			throw Handling.create(factory, newMessage, messageParams);
		}
	}

	/** Just to mirror the method: Ensures the result is not null */
	default boolean nonNullTest(float a1, float a2) {
		return test(a1, a2);
	}

	/** For convenience, where "test()" makes things more confusing than "applyAsBoolean()". */

	default boolean doApplyAsBoolean(float a1, float a2) {
		return test(a1, a2);
	}

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

	/** From-To. Intended to be used with non-capturing lambda. */
	public static void fromTo(int min_i, int max_i, float a1, float a2, LBiFltPredicate func) {
		Null.nonNullArg(func, "func");
		if (min_i <= max_i) {
			for (int i = min_i; i <= max_i; i++) {
				func.test(a1, a2);
			}
		} else {
			for (int i = min_i; i >= max_i; i--) {
				func.test(a1, a2);
			}
		}
	}

	/** From-To. Intended to be used with non-capturing lambda. */
	public static void fromTill(int min_i, int max_i, float a1, float a2, LBiFltPredicate func) {
		Null.nonNullArg(func, "func");
		if (min_i <= max_i) {
			for (int i = min_i; i < max_i; i++) {
				func.test(a1, a2);
			}
		} else {
			for (int i = min_i; i > max_i; i--) {
				func.test(a1, a2);
			}
		}
	}

	/** From-To. Intended to be used with non-capturing lambda. */
	public static void times(int max_i, float a1, float a2, LBiFltPredicate func) {
		if (max_i < 0)
			return;
		fromTill(0, max_i, a1, a2, func);
	}

	public default LFltPredicate lShrink(LFltUnaryOperator left) {
		return a2 -> test(left.applyAsFlt(a2), a2);
	}

	public default LFltPredicate lShrinkc(float a1) {
		return a2 -> test(a1, a2);
	}

	public static LFltPredicate lShrinked(LFltUnaryOperator left, LBiFltPredicate func) {
		return func.lShrink(left);
	}

	public static LFltPredicate lShrinkedc(float a1, LBiFltPredicate func) {
		return func.lShrinkc(a1);
	}

	public default LFltPredicate rShrink(LFltUnaryOperator right) {
		return a1 -> test(a1, right.applyAsFlt(a1));
	}

	public default LFltPredicate rShrinkc(float a2) {
		return a1 -> test(a1, a2);
	}

	public static LFltPredicate rShrinked(LFltUnaryOperator right, LBiFltPredicate func) {
		return func.rShrink(right);
	}

	public static LFltPredicate rShrinkedc(float a2, LBiFltPredicate func) {
		return func.rShrinkc(a2);
	}

	/**  */
	public static LBiFltPredicate uncurry(LFltFunction func) {
		return (float a1, float a2) -> func.apply(a1).test(a2);
	}

	/** Captures arguments but delays the evaluation. */
	default LBoolSupplier capture(float a1, float a2) {
		return () -> this.test(a1, a2);
	}

	/** Creates function that always returns the same value. */
	static LBiFltPredicate constant(boolean r) {
		return (a1, a2) -> r;
	}

	/** Captures single parameter function into this interface where only 1st parameter will be used. */
	@Nonnull
	static LBiFltPredicate test1st(@Nonnull LFltPredicate func) {
		return (a1, a2) -> func.test(a1);
	}

	/** Captures single parameter function into this interface where only 2nd parameter will be used. */
	@Nonnull
	static LBiFltPredicate test2nd(@Nonnull LFltPredicate func) {
		return (a1, a2) -> func.test(a2);
	}

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

	@Nonnull
	static LBiFltPredicate recursive(final @Nonnull LFunction selfLambda) {
		final LBiFltPredicateSingle single = new LBiFltPredicateSingle();
		LBiFltPredicate func = selfLambda.apply(single);
		single.target = func;
		return func;
	}

	final class LBiFltPredicateSingle implements LSingle, LBiFltPredicate {
		private LBiFltPredicate target = null;

		@Override
		public boolean testX(float a1, float a2) throws Throwable {
			return target.testX(a1, a2);
		}

		@Override
		public LBiFltPredicate value() {
			return target;
		}
	}

	@Nonnull
	static LBiFltPredicate biFltPredThrowing(final @Nonnull ExF exF) {
		Null.nonNullArg(exF, "exF");
		return (a1, a2) -> {
			throw exF.produce();
		};
	}

	@Nonnull
	static LBiFltPredicate biFltPredThrowing(final String message, final @Nonnull ExMF exF) {
		Null.nonNullArg(exF, "exF");
		return (a1, a2) -> {
			throw exF.produce(message);
		};
	}

	// 

	/** Convenient method in case lambda expression is ambiguous for the compiler (that might happen for overloaded methods accepting different interfaces). */
	@Nonnull
	static LFlt1Flt0Pred flt1Flt0Pred(final @Nonnull LFlt1Flt0Pred lambda) {
		Null.nonNullArg(lambda, "lambda");
		return lambda;
	}

	// 

	static boolean call(float a1, float a2, final @Nonnull LBiFltPredicate lambda) {
		Null.nonNullArg(lambda, "lambda");
		return lambda.test(a1, a2);
	}

	// 

	// 

	// 

	/** Safe instance. That always returns the same value (as alwaysFalse). */
	@Nonnull
	static LBiFltPredicate safe() {
		return LBiFltPredicate::alwaysFalse;
	}

	/** Safe instance supplier. Returns supplier of safe() instance. */
	@Nonnull
	static LSupplier safeSupplier() {
		return () -> safe();
	}

	/** Safe wrapping. Either argument function is returned (if it is not null) or safe() instance. */
	@Nonnull
	static LBiFltPredicate safe(final @Nullable LBiFltPredicate other) {
		if (other == null) {
			return safe();
		} else {
			return other;
		}
	}

	/** Safe supplier. Either argument supplier is returned (if it is not null) or supplier of safe() instance. */
	@Nonnull
	static LSupplier safeSupplier(final @Nullable LSupplier supplier) {
		if (supplier == null) {
			return safeSupplier();
		} else {
			return supplier;
		}
	}

	// 
	// 

	/**
	 * Returns a predicate that represents the logical negation of this predicate.
	 *
	 * @see {@link java.util.function.Predicate#negate}
	 */
	@Nonnull
	default LBiFltPredicate negate() {
		return (a1, a2) -> !test(a1, a2);
	}

	/**
	 * Returns a predicate that represents the logical AND of evaluation of this predicate and the argument one.
	 * @see {@link java.util.function.Predicate#and()}
	 */
	@Nonnull
	default LBiFltPredicate and(@Nonnull LBiFltPredicate other) {
		Null.nonNullArg(other, "other");
		return (a1, a2) -> test(a1, a2) && other.test(a1, a2);
	}

	/**
	 * Returns a predicate that represents the logical OR of evaluation of this predicate and the argument one.
	 * @see {@link java.util.function.Predicate#or}
	 */
	@Nonnull
	default LBiFltPredicate or(@Nonnull LBiFltPredicate other) {
		Null.nonNullArg(other, "other");
		return (a1, a2) -> test(a1, a2) || other.test(a1, a2);
	}

	/**
	 * Returns a predicate that represents the logical XOR of evaluation of this predicate and the argument one.
	 * @see {@link java.util.function.Predicate#or}
	 */
	@Nonnull
	default LBiFltPredicate xor(@Nonnull LBiFltPredicate other) {
		Null.nonNullArg(other, "other");
		return (a1, a2) -> test(a1, a2) ^ other.test(a1, a2);
	}

	/**
	 * Creates predicate that evaluates if an object is equal with the argument one.
	 * @see {@link java.util.function.Predicate#isEqual()
	 */
	@Nonnull
	static LBiFltPredicate isEqual(float v1, float v2) {
		return (a1, a2) -> (a1 == v1) && (a2 == v2);
	}

	// 

	// 

	/** Allows to manipulate the domain of the function. */
	@Nonnull
	default LBiFltPredicate compose(@Nonnull final LFltUnaryOperator before1, @Nonnull final LFltUnaryOperator before2) {
		Null.nonNullArg(before1, "before1");
		Null.nonNullArg(before2, "before2");
		return (v1, v2) -> this.test(before1.applyAsFlt(v1), before2.applyAsFlt(v2));
	}

	public static LBiFltPredicate composed(@Nonnull final LFltUnaryOperator before1, @Nonnull final LFltUnaryOperator before2, LBiFltPredicate after) {
		return after.compose(before1, before2);
	}

	/** Allows to manipulate the domain of the function. */
	@Nonnull
	default  LBiPredicate biFltPredCompose(@Nonnull final LToFltFunction before1, @Nonnull final LToFltFunction before2) {
		Null.nonNullArg(before1, "before1");
		Null.nonNullArg(before2, "before2");
		return (v1, v2) -> this.test(before1.applyAsFlt(v1), before2.applyAsFlt(v2));
	}

	public static  LBiPredicate composed(@Nonnull final LToFltFunction before1, @Nonnull final LToFltFunction before2, LBiFltPredicate after) {
		return after.biFltPredCompose(before1, before2);
	}

	// 

	// 

	/** Combines two functions together in a order. */
	@Nonnull
	default  LBiFltFunction boolToBiFltFunc(@Nonnull LBoolFunction after) {
		Null.nonNullArg(after, "after");
		return (a1, a2) -> after.apply(this.test(a1, a2));
	}

	/** Combines two functions together in a order. */
	@Nonnull
	default LFltBinaryOperator boolToFltBinaryOp(@Nonnull LBoolToFltFunction after) {
		Null.nonNullArg(after, "after");
		return (a1, a2) -> after.applyAsFlt(this.test(a1, a2));
	}

	/** Combines two functions together in a order. */
	@Nonnull
	default LBiFltPredicate boolToBiFltPred(@Nonnull LLogicalOperator after) {
		Null.nonNullArg(after, "after");
		return (a1, a2) -> after.apply(this.test(a1, a2));
	}

	// 

	// 

	// 

	// 

	/** Permutation of LBiFltPredicate for method references. */
	@FunctionalInterface
	interface LFlt1Flt0Pred extends LBiFltPredicate {

		boolean testFlt1Flt0(float a2, float a1);

		@Override
		default boolean testX(float a1, float a2) {
			return this.testFlt1Flt0(a2, a1);
		}
	}

	// 

	// >>> LBiFltPredicate

	/** Returns TRUE. */
	public static boolean alwaysTrue(float a1, float a2) {
		return true;
	}

	/** Returns FALSE. */
	public static boolean alwaysFalse(float a1, float a2) {
		return false;
	}

	/**
	* For each element (or tuple) from arguments, calls the consumer if predicate test passes.
	* Thread safety, fail-fast, fail-safety of this method is not expected.
	*/
	default  void filterForEach(IndexedRead ia1, C1 source1, IndexedRead ia2, C2 source2, LBiFltConsumer consumer) {
		int size = ia1.size(source1);
		LOiToFltFunction oiFunc1 = (LOiToFltFunction) ia1.getter();
		size = Integer.min(size, ia2.size(source2));
		LOiToFltFunction oiFunc2 = (LOiToFltFunction) ia2.getter();
		int i = 0;
		for (; i < size; i++) {
			float a1 = oiFunc1.applyAsFlt(source1, i);
			float a2 = oiFunc2.applyAsFlt(source2, i);
			doIf(a1, a2, consumer);
		}
	}

	/**
	* For each element (or tuple) from arguments, calls the consumer if predicate test passes.
	* Thread safety, fail-fast, fail-safety of this method is not expected.
	*/
	default  void filterIterate(SequentialRead sa1, C1 source1, IndexedRead ia2, C2 source2, LBiFltConsumer consumer) {
		Object iterator1 = ((LFunction) sa1.adapter()).apply(source1);
		LPredicate testFunc1 = (LPredicate) sa1.tester();
		LToFltFunction nextFunc1 = (LToFltFunction) sa1.supplier();
		int size = ia2.size(source2);
		LOiToFltFunction oiFunc2 = (LOiToFltFunction) ia2.getter();
		int i = 0;
		while (testFunc1.test(iterator1) && i < size) {
			float a1 = nextFunc1.applyAsFlt(iterator1);
			float a2 = oiFunc2.applyAsFlt(source2, i);
			doIf(a1, a2, consumer);
			i++;
		}
	}

	/**
	* For each element (or tuple) from arguments, calls the consumer if predicate test passes.
	* Thread safety, fail-fast, fail-safety of this method is not expected.
	*/
	default  void filterIterate(IndexedRead ia1, C1 source1, SequentialRead sa2, C2 source2, LBiFltConsumer consumer) {
		int size = ia1.size(source1);
		LOiToFltFunction oiFunc1 = (LOiToFltFunction) ia1.getter();
		Object iterator2 = ((LFunction) sa2.adapter()).apply(source2);
		LPredicate testFunc2 = (LPredicate) sa2.tester();
		LToFltFunction nextFunc2 = (LToFltFunction) sa2.supplier();
		int i = 0;
		while (i < size && testFunc2.test(iterator2)) {
			float a1 = oiFunc1.applyAsFlt(source1, i);
			float a2 = nextFunc2.applyAsFlt(iterator2);
			doIf(a1, a2, consumer);
			i++;
		}
	}

	/**
	* For each element (or tuple) from arguments, calls the consumer if predicate test passes.
	* Thread safety, fail-fast, fail-safety of this method depends highly on the arguments.
	*/
	default  void filterIterate(SequentialRead sa1, C1 source1, SequentialRead sa2, C2 source2, LBiFltConsumer consumer) {
		Object iterator1 = ((LFunction) sa1.adapter()).apply(source1);
		LPredicate testFunc1 = (LPredicate) sa1.tester();
		LToFltFunction nextFunc1 = (LToFltFunction) sa1.supplier();
		Object iterator2 = ((LFunction) sa2.adapter()).apply(source2);
		LPredicate testFunc2 = (LPredicate) sa2.tester();
		LToFltFunction nextFunc2 = (LToFltFunction) sa2.supplier();
		while (testFunc1.test(iterator1) && testFunc2.test(iterator2)) {
			float a1 = nextFunc1.applyAsFlt(iterator1);
			float a2 = nextFunc2.applyAsFlt(iterator2);
			doIf(a1, a2, consumer);
		}
	}

}