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package org.openjdk.jmc.flightrecorder.rules.jdk.general;

import java.util.Collection;
import java.util.Collections;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
import java.util.concurrent.RunnableFuture;

import org.openjdk.jmc.common.item.IItemCollection;
import org.openjdk.jmc.common.util.IPreferenceValueProvider;
import org.openjdk.jmc.common.util.TypedPreference;
import org.openjdk.jmc.flightrecorder.jdk.JdkAggregators;
import org.openjdk.jmc.flightrecorder.jdk.JdkTypeIDs;
import org.openjdk.jmc.flightrecorder.rules.IRule;
import org.openjdk.jmc.flightrecorder.rules.Result;
import org.openjdk.jmc.flightrecorder.rules.jdk.messages.internal.Messages;
import org.openjdk.jmc.flightrecorder.rules.util.JfrRuleTopics;
import org.openjdk.jmc.flightrecorder.rules.util.RulesToolkit;
import org.openjdk.jmc.flightrecorder.rules.util.RulesToolkit.EventAvailability;

public class DiscouragedVmOptionsRule implements IRule {
	private static final String DISCOURAGED_VM_OPTIONS_RESULT_ID = "DiscouragedVmOptions"; //$NON-NLS-1$

	private Result getResult(IItemCollection items, IPreferenceValueProvider valueProvider) {
		EventAvailability eventAvailability = RulesToolkit.getEventAvailability(items, JdkTypeIDs.BOOLEAN_FLAG);
		if (eventAvailability == EventAvailability.UNKNOWN || eventAvailability == EventAvailability.DISABLED) {
			return RulesToolkit.getEventAvailabilityResult(this, items, eventAvailability, JdkTypeIDs.BOOLEAN_FLAG);
		}

		Boolean unlockExperimentalVMOptions = items.getAggregate(JdkAggregators.UNLOCK_EXPERIMENTAL_VM_OPTIONS);
		Boolean ignoreUnrecognizedVMOptions = items.getAggregate(JdkAggregators.IGNORE_UNRECOGNIZED_VM_OPTIONS);

		if (unlockExperimentalVMOptions != null && ignoreUnrecognizedVMOptions != null && unlockExperimentalVMOptions
				&& ignoreUnrecognizedVMOptions) {
			String shortMessage = Messages.getString(Messages.DiscouragedVmOptionsRule_BOTH_EXPERIMENTAL_AND_IGNORE);
			String longMessage = shortMessage + " " //$NON-NLS-1$
					+ Messages.getString(Messages.UnlockExperimentalVMOptionsRuleFactory_TEXT_INFO_LONG) + " " //$NON-NLS-1$
					+ Messages.getString(Messages.IgnoreUnrecognizedVMOptionsRuleFactory_TEXT_INFO_LONG);
			return new Result(this, 50, shortMessage, longMessage);
		} else if (ignoreUnrecognizedVMOptions != null && ignoreUnrecognizedVMOptions) {
			return new Result(this, 50, Messages.getString(Messages.IgnoreUnrecognizedVMOptionsRuleFactory_TEXT_INFO),
					Messages.getString(Messages.IgnoreUnrecognizedVMOptionsRuleFactory_TEXT_INFO_LONG));
		} else if (unlockExperimentalVMOptions != null && unlockExperimentalVMOptions) {
			return new Result(this, 50, Messages.getString(Messages.UnlockExperimentalVMOptionsRuleFactory_TEXT_INFO),
					Messages.getString(Messages.UnlockExperimentalVMOptionsRuleFactory_TEXT_INFO_LONG));
		} else {
			return new Result(this, 0, Messages.getString(Messages.DiscouragedVmOptionsRule_TEXT_OK));
		}
	}

	@Override
	public RunnableFuture<Result> evaluate(final IItemCollection items, final IPreferenceValueProvider valueProvider) {
		FutureTask<Result> evaluationTask = new FutureTask<>(new Callable<Result>() {
			@Override
			public Result call() throws Exception {
				return getResult(items, valueProvider);
			}
		});
		return evaluationTask;
	}

	@Override
	public Collection<TypedPreference<?>> getConfigurationAttributes() {
		return Collections.emptyList();
	}

	@Override
	public String getId() {
		return DISCOURAGED_VM_OPTIONS_RESULT_ID;
	}

	@Override
	public String getName() {
		return Messages.getString(Messages.DiscouragedVmOptionsRule_RULE_NAME);
	}

	@Override
	public String getTopic() {
		return JfrRuleTopics.JVM_INFORMATION_TOPIC;
	}
}