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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.tikv.cdc;

import org.tikv.kvproto.Cdcpb.Event.Row;

class CDCEvent {
    enum CDCEventType {
        ROW,
        RESOLVED_TS,
        ERROR
    }

    public final long regionId;

    public final CDCEventType eventType;

    public final long resolvedTs;

    public final Row row;

    public final Throwable error;

    private CDCEvent(
            final long regionId,
            final CDCEventType eventType,
            final long resolvedTs,
            final Row row,
            final Throwable error) {
        this.regionId = regionId;
        this.eventType = eventType;
        this.resolvedTs = resolvedTs;
        this.row = row;
        this.error = error;
    }

    public static CDCEvent rowEvent(final long regionId, final Row row) {
        return new CDCEvent(regionId, CDCEventType.ROW, 0, row, null);
    }

    public static CDCEvent resolvedTsEvent(final long regionId, final long resolvedTs) {
        return new CDCEvent(regionId, CDCEventType.RESOLVED_TS, resolvedTs, null, null);
    }

    public static CDCEvent error(final long regionId, final Throwable error) {
        return new CDCEvent(regionId, CDCEventType.ERROR, 0, null, error);
    }

    // add new CDCEvent constructor
    public static CDCEvent error(final long regionId, final Throwable error, long resolvedTs) {
        return new CDCEvent(regionId, CDCEventType.ERROR, resolvedTs, null, error);
    }

    @Override
    public String toString() {
        final StringBuilder builder = new StringBuilder();
        builder.append("CDCEvent[").append(eventType.toString()).append("] {");
        switch (eventType) {
            case ERROR:
                builder.append("error=").append(error.getMessage());
                break;
            case RESOLVED_TS:
                builder.append("resolvedTs=").append(resolvedTs);
                break;
            case ROW:
                builder.append("row=").append(row);
                break;
        }
        return builder.append("}").toString();
    }
}