/*
 * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.data.impl.leafref.context;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import org.apache.log4j.BasicConfigurator;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.common.QNameModule;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeConfiguration;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
import org.opendaylight.yangtools.yang.data.impl.leafref.LeafRefContext;
import org.opendaylight.yangtools.yang.data.impl.leafref.LeafRefDataValidationFailedException;
import org.opendaylight.yangtools.yang.data.impl.leafref.LeafRefValidation;
import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DataTreeCandidateValidatorTest3 {

    private static EffectiveModelContext context;
    private static Module mainModule;
    private static QNameModule rootModuleQname;
    private static LeafRefContext rootLeafRefContext;
    public static DataTree inMemoryDataTree;

    private static QName chips;
    private static QName chip;
    private static QName devType;
    private static QName chipDesc;

    private static QName devices;
    private static QName device;
    private static QName typeText1;
    private static QName typeText2;
    private static QName typeText3;
    private static QName devDesc;
    private static QName sn;
    private static QName defaultIp;

    private static QName deviceTypeStr;
    private static QName deviceType;
    private static QName type1;
    private static QName type2;
    private static QName type3;
    private static QName desc;

    private static final Logger LOG = LoggerFactory.getLogger(DataTreeCandidateValidatorTest3.class);
    private static final String NEW_LINE = System.getProperty("line.separator");

    static {
        BasicConfigurator.configure();
    }

    @BeforeClass
    public static void init() throws DataValidationFailedException {
        context = YangParserTestUtils.parseYangResourceDirectory("/leafref-validation");

        for (final Module module : context.getModules()) {
            if (module.getName().equals("leafref-validation3")) {
                mainModule = module;
            }
        }

        rootModuleQname = mainModule.getQNameModule();
        rootLeafRefContext = LeafRefContext.create(context);


        chips = QName.create(rootModuleQname, "chips");
        chip = QName.create(rootModuleQname, "chip");
        devType = QName.create(rootModuleQname, "dev_type");
        chipDesc = QName.create(rootModuleQname, "chip_desc");

        devices = QName.create(rootModuleQname, "devices");
        device = QName.create(rootModuleQname, "device");
        typeText1 = QName.create(rootModuleQname, "type_text1");
        typeText2 = QName.create(rootModuleQname, "type_text2");
        typeText3 = QName.create(rootModuleQname, "type_text3");
        devDesc = QName.create(rootModuleQname, "dev_desc");
        sn = QName.create(rootModuleQname, "sn");
        defaultIp = QName.create(rootModuleQname, "default_ip");

        deviceTypeStr = QName.create(rootModuleQname, "device_types");
        deviceType = QName.create(rootModuleQname, "device_type");
        type1 = QName.create(rootModuleQname, "type1");
        type2 = QName.create(rootModuleQname, "type2");
        type3 = QName.create(rootModuleQname, "type3");
        desc = QName.create(rootModuleQname, "desc");

        inMemoryDataTree = new InMemoryDataTreeFactory().create(DataTreeConfiguration.DEFAULT_OPERATIONAL, context);

        final DataTreeModification initialDataTreeModification = inMemoryDataTree.takeSnapshot().newModification();

        final ContainerSchemaNode chipsListContSchemaNode = (ContainerSchemaNode) mainModule.findDataChildByName(chips)
                .get();
        final ContainerNode chipsContainer = createChipsContainer(chipsListContSchemaNode);
        final YangInstanceIdentifier path1 = YangInstanceIdentifier.of(chips);
        initialDataTreeModification.write(path1, chipsContainer);

        final ContainerSchemaNode devTypesListContSchemaNode = (ContainerSchemaNode) mainModule
                .findDataChildByName(deviceTypeStr).get();
        final ContainerNode deviceTypesContainer = createDevTypeStrContainer(devTypesListContSchemaNode);
        final YangInstanceIdentifier path2 = YangInstanceIdentifier.of(deviceTypeStr);
        initialDataTreeModification.write(path2, deviceTypesContainer);

        initialDataTreeModification.ready();
        final DataTreeCandidate writeChipsCandidate = inMemoryDataTree.prepare(initialDataTreeModification);

        inMemoryDataTree.commit(writeChipsCandidate);

        LOG.debug("{}", inMemoryDataTree);
    }

    @AfterClass
    public static void cleanup() {
        inMemoryDataTree = null;
        rootLeafRefContext = null;
        mainModule = null;
        context = null;
    }

    @Test
    public void dataTreeCanditateValidationTest2() throws DataValidationFailedException {
        writeDevices();
        mergeDevices();
    }

    private static void writeDevices() throws DataValidationFailedException {
        final ContainerSchemaNode devicesContSchemaNode = (ContainerSchemaNode) mainModule.findDataChildByName(devices)
                .get();
        final ContainerNode devicesContainer = createDevicesContainer(devicesContSchemaNode);
        final YangInstanceIdentifier devicesPath = YangInstanceIdentifier.of(devices);
        final DataTreeModification writeModification = inMemoryDataTree.takeSnapshot().newModification();
        writeModification.write(devicesPath, devicesContainer);

        writeModification.ready();
        final DataTreeCandidate writeDevicesCandidate = inMemoryDataTree.prepare(writeModification);

        LOG.debug("*************************");
        LOG.debug("Before writeDevices: ");
        LOG.debug("*************************");
        LOG.debug("{}", inMemoryDataTree);

        boolean exception = false;
        try {
            LeafRefValidation.validate(writeDevicesCandidate, rootLeafRefContext);
        } catch (final LeafRefDataValidationFailedException e) {
            LOG.debug("All validation errors:{}{}", NEW_LINE, e.getMessage());
            assertEquals(6, e.getValidationsErrorsCount());
            exception = true;
        }

        assertTrue(exception);

        inMemoryDataTree.commit(writeDevicesCandidate);

        LOG.debug("*************************");
        LOG.debug("After writeDevices: ");
        LOG.debug("*************************");
        LOG.debug("{}", inMemoryDataTree);
    }

    private static void mergeDevices() throws DataValidationFailedException {

        final ContainerSchemaNode devicesContSchemaNode = (ContainerSchemaNode) mainModule.findDataChildByName(devices)
                .get();

        final ContainerNode devicesContainer = createDevices2Container(devicesContSchemaNode);

        final YangInstanceIdentifier devicesPath = YangInstanceIdentifier.of(devices);
        final DataTreeModification mergeModification = inMemoryDataTree.takeSnapshot().newModification();
        mergeModification.write(devicesPath, devicesContainer);
        mergeModification.merge(devicesPath, devicesContainer);

        mergeModification.ready();
        final DataTreeCandidate mergeDevicesCandidate = inMemoryDataTree.prepare(mergeModification);

        LOG.debug("*************************");
        LOG.debug("Before mergeDevices: ");
        LOG.debug("*************************");
        LOG.debug("{}", inMemoryDataTree);

        boolean exception = false;
        try {
            LeafRefValidation.validate(mergeDevicesCandidate, rootLeafRefContext);
        } catch (final LeafRefDataValidationFailedException e) {
            LOG.debug("All validation errors:{}{}", NEW_LINE, e.getMessage());
            // :TODO verify errors count gz
            assertEquals(6, e.getValidationsErrorsCount());
            exception = true;
        }

        inMemoryDataTree.commit(mergeDevicesCandidate);

        LOG.debug("*************************");
        LOG.debug("After mergeDevices: ");
        LOG.debug("*************************");
        LOG.debug("{}", inMemoryDataTree);

        assertTrue(exception);
    }

    private static ContainerNode createDevTypeStrContainer(final ContainerSchemaNode container) {

        final ListSchemaNode devTypeListSchemaNode = (ListSchemaNode) container.findDataChildByName(deviceType).get();

        final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> devTypeContainerBldr = Builders
                .containerBuilder(container);

        final MapNode devTypeMap = createDevTypeList(devTypeListSchemaNode);
        devTypeContainerBldr.addChild(devTypeMap);

        return devTypeContainerBldr.build();
    }

    private static MapNode createDevTypeList(final ListSchemaNode devTypeListSchemaNode) {

        final CollectionNodeBuilder<MapEntryNode, MapNode> devTypeMapBldr = Builders.mapBuilder(devTypeListSchemaNode);

        devTypeMapBldr.addChild(createDevTypeListEntry("dev_type1_1", "dev_type2_1", "dev_type3_1", "typedesc1",
                devTypeListSchemaNode));
        devTypeMapBldr.addChild(createDevTypeListEntry("dev_type1_2", "dev_type2_2", "dev_type3_2", "typedesc2",
                devTypeListSchemaNode));
        devTypeMapBldr.addChild(createDevTypeListEntry("dev_type1_3", "dev_type2_3", "dev_type3_3", "typedesc3",
                devTypeListSchemaNode));

        return devTypeMapBldr.build();
    }

    private static MapEntryNode createDevTypeListEntry(final String type1Val, final String type2Val,
            final String type3Val, final String descVal, final ListSchemaNode devTypeListSchemaNode) {

        final LeafNode<String> type1Leaf = ImmutableNodes.leafNode(type1, type1Val);
        final LeafNode<String> type2Leaf = ImmutableNodes.leafNode(type2, type2Val);
        final LeafNode<String> type3Leaf = ImmutableNodes.leafNode(type3, type3Val);
        final LeafNode<String> descLeaf = ImmutableNodes.leafNode(desc, descVal);

        final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> devTypeMapEntryBldr = Builders
                .mapEntryBuilder(devTypeListSchemaNode);

        devTypeMapEntryBldr.addChild(type1Leaf);
        devTypeMapEntryBldr.addChild(type2Leaf);
        devTypeMapEntryBldr.addChild(type3Leaf);
        devTypeMapEntryBldr.addChild(descLeaf);

        return devTypeMapEntryBldr.build();
    }

    private static ContainerNode createChipsContainer(final ContainerSchemaNode container) {

        final ListSchemaNode chipsListSchemaNode = (ListSchemaNode) container.findDataChildByName(chip).get();

        final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> chipsContainerBldr = Builders
                .containerBuilder(container);

        final MapNode chipsMap = createChipsList(chipsListSchemaNode);
        chipsContainerBldr.addChild(chipsMap);

        return chipsContainerBldr.build();
    }

    private static MapNode createChipsList(final ListSchemaNode chipsListSchemaNode) {

        final CollectionNodeBuilder<MapEntryNode, MapNode> chipsMapBldr = Builders.mapBuilder(chipsListSchemaNode);

        chipsMapBldr.addChild(createChipsListEntry("dev_type_1", "desc1", chipsListSchemaNode));
        chipsMapBldr.addChild(createChipsListEntry("dev_type_2", "desc2", chipsListSchemaNode));

        return chipsMapBldr.build();
    }

    private static MapEntryNode createChipsListEntry(final String devTypeVal, final String chipDescVal,
            final ListSchemaNode chipsListSchemaNode) {

        final LeafNode<String> devTypeLeaf = ImmutableNodes.leafNode(devType, devTypeVal);
        final LeafNode<String> chipDescLeaf = ImmutableNodes.leafNode(chipDesc, chipDescVal);

        final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> chipsMapEntryBldr = Builders
                .mapEntryBuilder(chipsListSchemaNode);

        chipsMapEntryBldr.addChild(devTypeLeaf);
        chipsMapEntryBldr.addChild(chipDescLeaf);

        return chipsMapEntryBldr.build();
    }

    private static ContainerNode createDevicesContainer(final ContainerSchemaNode container) {

        final ListSchemaNode devicesListSchemaNode = (ListSchemaNode) container.findDataChildByName(device).get();

        final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> devicesContainerBldr = Builders
                .containerBuilder(container);

        final MapNode devicesMap = createDeviceList(devicesListSchemaNode);
        devicesContainerBldr.addChild(devicesMap);

        return devicesContainerBldr.build();
    }

    private static MapNode createDeviceList(final ListSchemaNode deviceListSchemaNode) {

        final CollectionNodeBuilder<MapEntryNode, MapNode> devicesMapBldr = Builders.mapBuilder(deviceListSchemaNode);

        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_1", "dev_type2_1", "dev_type3_1", "typedesc1", 123456,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_2", "dev_type2_2", "dev_type3_2", "typedesc1", 123457,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_1", "dev_type2_2", "dev_type3_3", "typedesc2", 123458,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("unk11", "unk22", "unk33", "unk_desc2", 123457, "192.168.0.1",
                deviceListSchemaNode));

        return devicesMapBldr.build();
    }

    private static ContainerNode createDevices2Container(final ContainerSchemaNode container) {

        final ListSchemaNode devicesListSchemaNode = (ListSchemaNode) container.findDataChildByName(device).get();

        final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> devicesContainerBldr = Builders
                .containerBuilder(container);

        final MapNode devicesMap = createDevice2List(devicesListSchemaNode);
        devicesContainerBldr.addChild(devicesMap);

        return devicesContainerBldr.build();
    }

    private static MapNode createDevice2List(final ListSchemaNode deviceListSchemaNode) {

        final CollectionNodeBuilder<MapEntryNode, MapNode> devicesMapBldr = Builders.mapBuilder(deviceListSchemaNode);

        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_3", "dev_type2_3", "dev_type3_3", "typedesc3", 123459,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_3", "dev_type2_3", "dev_type3_3", "typedesc2", 123460,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("dev_type1_3", "dev_type2_2", "dev_type3_1", "typedesc1", 123461,
                "192.168.0.1", deviceListSchemaNode));
        devicesMapBldr.addChild(createDeviceListEntry("unk1", "unk2", "unk3", "unk_desc", 123462, "192.168.0.1",
                deviceListSchemaNode));

        return devicesMapBldr.build();
    }

    private static MapEntryNode createDeviceListEntry(final String type1TextVal, final String type2TextVal,
            final String type3TextVal, final String descVal, final int snVal, final String defaultIpVal,
            final ListSchemaNode devicesListSchemaNode) {

        final LeafNode<String> typeText1Leaf = ImmutableNodes.leafNode(typeText1, type1TextVal);
        final LeafNode<String> typeText2Leaf = ImmutableNodes.leafNode(typeText2, type2TextVal);
        final LeafNode<String> typeText3Leaf = ImmutableNodes.leafNode(typeText3, type3TextVal);
        final LeafNode<String> descLeaf = ImmutableNodes.leafNode(devDesc, descVal);
        final LeafNode<Integer> snValLeaf = ImmutableNodes.leafNode(sn, snVal);
        final LeafNode<String> defaultIpLeaf = ImmutableNodes.leafNode(defaultIp, defaultIpVal);

        final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> devicesMapEntryBldr = Builders
                .mapEntryBuilder(devicesListSchemaNode);

        devicesMapEntryBldr.addChild(typeText1Leaf);
        devicesMapEntryBldr.addChild(typeText2Leaf);
        devicesMapEntryBldr.addChild(typeText3Leaf);
        devicesMapEntryBldr.addChild(descLeaf);
        devicesMapEntryBldr.addChild(snValLeaf);
        devicesMapEntryBldr.addChild(defaultIpLeaf);

        return devicesMapEntryBldr.build();
    }
}