/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.jboss.as.clustering.infinispan.subsystem;

import java.util.concurrent.TimeUnit;
import java.util.function.UnaryOperator;

import org.infinispan.Cache;
import org.infinispan.configuration.cache.BackupConfiguration.BackupStrategy;
import org.infinispan.configuration.cache.BackupFailurePolicy;
import org.jboss.as.clustering.controller.ChildResourceDefinition;
import org.jboss.as.clustering.controller.ManagementResourceRegistration;
import org.jboss.as.clustering.controller.OperationHandler;
import org.jboss.as.clustering.controller.ResourceDescriptor;
import org.jboss.as.clustering.controller.ResourceServiceHandler;
import org.jboss.as.clustering.controller.SimpleResourceRegistrar;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.client.helpers.MeasurementUnit;
import org.jboss.as.controller.operations.validation.EnumValidator;
import org.jboss.as.controller.registry.AttributeAccess;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.wildfly.subsystem.resource.operation.ResourceOperationRuntimeHandler;
import org.wildfly.subsystem.service.capture.FunctionExecutorRegistry;

/**
 * Definition of a backup site resource.
 *
 * @author Paul Ferraro
 */
public class BackupResourceDefinition extends ChildResourceDefinition<ManagementResourceRegistration> {

    static final PathElement WILDCARD_PATH = pathElement(PathElement.WILDCARD_VALUE);

    static PathElement pathElement(String name) {
        return PathElement.pathElement("backup", name);
    }

    enum Attribute implements org.jboss.as.clustering.controller.Attribute, UnaryOperator<SimpleAttributeDefinitionBuilder> {
        FAILURE_POLICY("failure-policy", ModelType.STRING, new ModelNode(BackupFailurePolicy.WARN.name())) {
            @Override
            public SimpleAttributeDefinitionBuilder apply(SimpleAttributeDefinitionBuilder builder) {
                return builder.setValidator(EnumValidator.create(BackupFailurePolicy.class));
            }
        },
        STRATEGY("strategy", ModelType.STRING, new ModelNode(BackupStrategy.ASYNC.name())) {
            @Override
            public SimpleAttributeDefinitionBuilder apply(SimpleAttributeDefinitionBuilder builder) {
                return builder.setValidator(EnumValidator.create(BackupStrategy.class));
            }
        },
        TIMEOUT("timeout", ModelType.LONG, new ModelNode(TimeUnit.SECONDS.toMillis(10))) {
            @Override
            public SimpleAttributeDefinitionBuilder apply(SimpleAttributeDefinitionBuilder builder) {
                return builder.setMeasurementUnit(MeasurementUnit.MILLISECONDS);
            }
        },
        ;
        private final AttributeDefinition definition;

        Attribute(String name, ModelType type, ModelNode defaultValue) {
            this.definition = this.apply(new SimpleAttributeDefinitionBuilder(name, type)
                    .setAllowExpression(true)
                    .setRequired(false)
                    .setDefaultValue(defaultValue)
                    .setFlags(AttributeAccess.Flag.RESTART_RESOURCE_SERVICES)
                    ).build();
        }

        @Override
        public AttributeDefinition getDefinition() {
            return this.definition;
        }

        @Override
        public SimpleAttributeDefinitionBuilder apply(SimpleAttributeDefinitionBuilder builder) {
            return builder;
        }
    }

    enum TakeOfflineAttribute implements org.jboss.as.clustering.controller.Attribute {
        AFTER_FAILURES("after-failures", ModelType.INT, new ModelNode(1)),
        MIN_WAIT("min-wait", ModelType.LONG, ModelNode.ZERO_LONG),
        ;
        private final AttributeDefinition definition;

        TakeOfflineAttribute(String name, ModelType type, ModelNode defaultValue) {
            this.definition = new SimpleAttributeDefinitionBuilder(name, type)
                    .setAllowExpression(true)
                    .setRequired(false)
                    .setDefaultValue(defaultValue)
                    .setFlags(AttributeAccess.Flag.RESTART_RESOURCE_SERVICES)
                    .setMeasurementUnit((type == ModelType.LONG) ? MeasurementUnit.MILLISECONDS : null)
                    .build();
        }

        @Override
        public AttributeDefinition getDefinition() {
            return this.definition;
        }
    }

    enum DeprecatedAttribute implements org.jboss.as.clustering.controller.Attribute {
        ENABLED("enabled", ModelType.BOOLEAN, ModelNode.TRUE, InfinispanSubsystemModel.VERSION_16_0_0),
        ;
        private final AttributeDefinition definition;

        DeprecatedAttribute(String name, ModelType type, ModelNode defaultValue, InfinispanSubsystemModel deprecation) {
            this.definition = new SimpleAttributeDefinitionBuilder(name, type)
                    .setAllowExpression(true)
                    .setRequired(false)
                    .setDefaultValue(defaultValue)
                    .setDeprecated(deprecation.getVersion())
                    .setFlags(AttributeAccess.Flag.RESTART_RESOURCE_SERVICES)
                    .build();
        }

        @Override
        public AttributeDefinition getDefinition() {
            return this.definition;
        }
    }

    private final ResourceOperationRuntimeHandler parentRuntimeHandler;
    private final FunctionExecutorRegistry<Cache<?, ?>> executors;

    BackupResourceDefinition(ResourceOperationRuntimeHandler parentRuntimeHandler, FunctionExecutorRegistry<Cache<?, ?>> executors) {
        super(WILDCARD_PATH, InfinispanExtension.SUBSYSTEM_RESOLVER.createChildResolver(WILDCARD_PATH));
        this.parentRuntimeHandler = parentRuntimeHandler;
        this.executors = executors;
    }

    @Override
    public ManagementResourceRegistration register(ManagementResourceRegistration parent) {
        ManagementResourceRegistration registration = parent.registerSubModel(this);

        ResourceDescriptor descriptor = new ResourceDescriptor(this.getResourceDescriptionResolver())
                .addAttributes(Attribute.class)
                .addAttributes(TakeOfflineAttribute.class)
                .addAttributes(DeprecatedAttribute.class)
                ;
        ResourceOperationRuntimeHandler handler = ResourceOperationRuntimeHandler.restartParent(this.parentRuntimeHandler);
        new SimpleResourceRegistrar(descriptor, ResourceServiceHandler.of(handler)).register(registration);

        if (registration.isRuntimeOnlyRegistrationValid()) {
            new OperationHandler<>(new BackupOperationExecutor(this.executors), BackupOperation.class).register(registration);
        }

        return registration;
    }
}
