/**
 * Copyright © 2016-2022 The Thingsboard Authors
 *
 * 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 org.thingsboard.rule.engine.telemetry;

import com.google.gson.JsonParser;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StringUtils;
import org.thingsboard.rule.engine.api.RuleNode;
import org.thingsboard.rule.engine.api.TbContext;
import org.thingsboard.rule.engine.api.TbNode;
import org.thingsboard.rule.engine.api.TbNodeConfiguration;
import org.thingsboard.rule.engine.api.TbNodeException;
import org.thingsboard.rule.engine.api.util.TbNodeUtils;
import org.thingsboard.server.common.data.TenantProfile;
import org.thingsboard.server.common.data.kv.BasicTsKvEntry;
import org.thingsboard.server.common.data.kv.KvEntry;
import org.thingsboard.server.common.data.kv.TsKvEntry;
import org.thingsboard.server.common.data.plugin.ComponentType;
import org.thingsboard.server.common.msg.TbMsg;
import org.thingsboard.server.common.msg.session.SessionMsgType;
import org.thingsboard.server.common.transport.adaptor.JsonConverter;
import org.thingsboard.server.common.data.tenant.profile.DefaultTenantProfileConfiguration;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Slf4j
@RuleNode(
        type = ComponentType.ACTION,
        name = "save timeseries",
        configClazz = TbMsgTimeseriesNodeConfiguration.class,
        nodeDescription = "Saves timeseries data",
        nodeDetails = "Saves timeseries telemetry data based on configurable TTL parameter. Expects messages with 'POST_TELEMETRY_REQUEST' message type. " +
                "Timestamp in milliseconds will be taken from metadata.ts, otherwise 'now' message timestamp will be applied. " +
                "Allows stopping updating values for incoming keys in the latest ts_kv table if 'skipLatestPersistence' is set to true.\n " +
                "<br/>" +
                "Enable 'useServerTs' param to use the timestamp of the message processing instead of the timestamp from the message. " +
                "Useful for all sorts of sequential processing if you merge messages from multiple sources (devices, assets, etc).\n" +
                "<br/>" +
                "In the case of sequential processing, the platform guarantees that the messages are processed in the order of their submission to the queue. " +
                "However, the timestamp of the messages originated by multiple devices/servers may be unsynchronized long before they are pushed to the queue. " +
                "The DB layer has certain optimizations to ignore the updates of the \"attributes\" and \"latest values\" tables if the new record has a timestamp that is older than the previous record. " +
                "So, to make sure that all the messages will be processed correctly, one should enable this parameter for sequential message processing scenarios.",
        uiResources = {"static/rulenode/rulenode-core-config.js"},
        configDirective = "tbActionNodeTimeseriesConfig",
        icon = "file_upload"
)
public class TbMsgTimeseriesNode implements TbNode {

    private TbMsgTimeseriesNodeConfiguration config;
    private TbContext ctx;
    private long tenantProfileDefaultStorageTtl;

    @Override
    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
        this.config = TbNodeUtils.convert(configuration, TbMsgTimeseriesNodeConfiguration.class);
        this.ctx = ctx;
        ctx.addTenantProfileListener(this::onTenantProfileUpdate);
        onTenantProfileUpdate(ctx.getTenantProfile());
    }

    void onTenantProfileUpdate(TenantProfile tenantProfile) {
        DefaultTenantProfileConfiguration configuration = (DefaultTenantProfileConfiguration) tenantProfile.getProfileData().getConfiguration();
        tenantProfileDefaultStorageTtl = TimeUnit.DAYS.toSeconds(configuration.getDefaultStorageTtlDays());
    }

    @Override
    public void onMsg(TbContext ctx, TbMsg msg) {
        if (!msg.getType().equals(SessionMsgType.POST_TELEMETRY_REQUEST.name())) {
            ctx.tellFailure(msg, new IllegalArgumentException("Unsupported msg type: " + msg.getType()));
            return;
        }
        long ts = computeTs(msg, config.isUseServerTs());
        String src = msg.getData();
        Map<Long, List<KvEntry>> tsKvMap = JsonConverter.convertToTelemetry(new JsonParser().parse(src), ts);
        if (tsKvMap.isEmpty()) {
            ctx.tellFailure(msg, new IllegalArgumentException("Msg body is empty: " + src));
            return;
        }
        List<TsKvEntry> tsKvEntryList = new ArrayList<>();
        for (Map.Entry<Long, List<KvEntry>> tsKvEntry : tsKvMap.entrySet()) {
            for (KvEntry kvEntry : tsKvEntry.getValue()) {
                tsKvEntryList.add(new BasicTsKvEntry(tsKvEntry.getKey(), kvEntry));
            }
        }
        String ttlValue = msg.getMetaData().getValue("TTL");
        long ttl = !StringUtils.isEmpty(ttlValue) ? Long.parseLong(ttlValue) : config.getDefaultTTL();
        if (ttl == 0L) {
            ttl = tenantProfileDefaultStorageTtl;
        }
        if (config.isSkipLatestPersistence()) {
            ctx.getTelemetryService().saveWithoutLatestAndNotify(ctx.getTenantId(), msg.getCustomerId(), msg.getOriginator(), tsKvEntryList, ttl, new TelemetryNodeCallback(ctx, msg));
        } else {
            ctx.getTelemetryService().saveAndNotify(ctx.getTenantId(), msg.getCustomerId(), msg.getOriginator(), tsKvEntryList, ttl, new TelemetryNodeCallback(ctx, msg));
        }
    }

    public static long computeTs(TbMsg msg, boolean ignoreMetadataTs) {
        return ignoreMetadataTs ? System.currentTimeMillis() : msg.getMetaDataTs();
    }

    @Override
    public void destroy() {
        ctx.removeListeners();
    }

}
