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ClickHouse Native Protocol JDBC implementation
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/*
 * 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 com.github.housepower.client;

import com.github.housepower.serde.BinarySerializer;
import com.github.housepower.settings.ClickHouseConfig;
import com.github.housepower.settings.ClickHouseDefines;

import java.io.IOException;
import java.time.ZoneId;

public class NativeContext {

    private final ClientContext clientCtx;
    private final ServerContext serverCtx;
    private final NativeClient nativeClient;

    public NativeContext(ClientContext clientCtx, ServerContext serverCtx, NativeClient nativeClient) {
        this.clientCtx = clientCtx;
        this.serverCtx = serverCtx;
        this.nativeClient = nativeClient;
    }

    public ClientContext clientCtx() {
        return clientCtx;
    }

    public ServerContext serverCtx() {
        return serverCtx;
    }

    public NativeClient nativeClient() {
        return nativeClient;
    }

    public static class ClientContext {
        public static final int TCP_KINE = 1;

        public static final byte NO_QUERY = 0;
        public static final byte INITIAL_QUERY = 1;
        public static final byte SECONDARY_QUERY = 2;

        private final String clientName;
        private final String clientHostname;
        private final String initialAddress;

        public ClientContext(String initialAddress, String clientHostname, String clientName) {
            this.clientName = clientName;
            this.clientHostname = clientHostname;
            this.initialAddress = initialAddress;
        }

        public void writeTo(BinarySerializer serializer) throws IOException {
            serializer.writeVarInt(ClientContext.INITIAL_QUERY);
            serializer.writeUTF8StringBinary("");
            serializer.writeUTF8StringBinary("");
            serializer.writeUTF8StringBinary(initialAddress);

            // for TCP kind
            serializer.writeVarInt(TCP_KINE);
            serializer.writeUTF8StringBinary("");
            serializer.writeUTF8StringBinary(clientHostname);
            serializer.writeUTF8StringBinary(clientName);
            serializer.writeVarInt(ClickHouseDefines.MAJOR_VERSION);
            serializer.writeVarInt(ClickHouseDefines.MINOR_VERSION);
            serializer.writeVarInt(ClickHouseDefines.CLIENT_REVISION);
            serializer.writeUTF8StringBinary("");
        }
    }

    public static class ServerContext {
        private final long majorVersion;
        private final long minorVersion;
        private final long reversion;
        private final ZoneId timeZone;
        private final String displayName;
        private final ClickHouseConfig configure;

        public ServerContext(long majorVersion, long minorVersion, long reversion,
                             ClickHouseConfig configure,
                             ZoneId timeZone, String displayName) {
            this.majorVersion = majorVersion;
            this.minorVersion = minorVersion;
            this.reversion = reversion;
            this.configure = configure;
            this.timeZone = timeZone;
            this.displayName = displayName;
        }

        public long majorVersion() {
            return majorVersion;
        }

        public long minorVersion() {
            return minorVersion;
        }

        public long reversion() {
            return reversion;
        }

        public String version() {
            return majorVersion + "." + minorVersion + "." + reversion;
        }

        public ZoneId timeZone() {
            return timeZone;
        }

        public String displayName() {
            return displayName;
        }

        public ClickHouseConfig getConfigure() {
            return configure;
        }
    }
}