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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2022 QuestDB
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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.
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package io.questdb.griffin;

import io.questdb.std.LongList;
import io.questdb.std.ObjList;

import static io.questdb.griffin.AlterStatement.*;

public class AlterStatementBuilder {
    private final ObjList objCharList = new ObjList<>();
    private final LongList longList = new LongList();
    private final AlterStatement resultInstance;
    // This is only used to serialize Partition name in form 2020-02-12 or 2020-02 or 2020
    // to exception message using TableUtils.setSinkForPartition
    private short command;
    private String tableName;
    private int tableId;
    private int tableNamePosition;

    public AlterStatementBuilder() {
        this.resultInstance = new AlterStatement(longList, objCharList);
    }

    public void clear() {
        resultInstance.clear();
        objCharList.clear();
        longList.clear();
    }

    public AlterStatement build() {
        return resultInstance.of(command, tableName, tableId, tableNamePosition);
    }

    public AlterStatementBuilder ofAddColumn(
            int tableNamePosition,
            String tableName,
            int tableId
    ) {
        this.command = ADD_COLUMN;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofAddIndex(int tableNamePosition, String tableName, int tableId, CharSequence columnName, int indexValueBlockSize) {
        this.command = ADD_INDEX;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        this.objCharList.add(columnName);
        this.longList.add(indexValueBlockSize);
        return this;
    }

    public AlterStatementBuilder ofAttachPartition(int tableNamePosition, String tableName, int tableId) {
        this.command = ATTACH_PARTITION;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofCacheSymbol(int tableNamePosition, String tableName, int tableId, CharSequence columnName) {
        this.command = ADD_SYMBOL_CACHE;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        this.objCharList.add(columnName);
        return this;
    }

    public AlterStatementBuilder ofRemoveCacheSymbol(int tableNamePosition, String tableName, int tableId, CharSequence columnName) {
        assert columnName != null && columnName.length() > 0;
        this.command = REMOVE_SYMBOL_CACHE;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        this.objCharList.add(columnName);
        return this;
    }

    public AlterStatementBuilder ofDropColumn(CharSequence columnName) {
        assert columnName != null && columnName.length() > 0;
        this.objCharList.add(columnName);
        return this;
    }

    public AlterStatementBuilder ofDropColumn(int tableNamePosition, String tableName, int tableId) {
        this.command = DROP_COLUMN;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofDropPartition(int tableNamePosition, String tableName, int tableId) {
        this.command = DROP_PARTITION;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofRenameColumn(int tableNamePosition, String tableName, int tableId) {
        this.command = RENAME_COLUMN;
        this.tableNamePosition = tableNamePosition;
        this.tableName = tableName;
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofSetParamCommitLag(String tableName, int tableId, long commitLag) {
        this.command = SET_PARAM_COMMIT_LAG;
        this.tableName = tableName;
        this.longList.add(commitLag);
        this.tableId = tableId;
        return this;
    }

    public AlterStatementBuilder ofSetParamUncommittedRows(String tableName, int tableId, int maxUncommittedRows) {
        this.command = SET_PARAM_MAX_UNCOMMITTED_ROWS;
        this.tableName = tableName;
        this.longList.add(maxUncommittedRows);
        this.tableId = tableId;
        return this;
    }

        public void ofRenameColumn(CharSequence columnName, CharSequence newName) {
            objCharList.add(columnName);
            objCharList.add(newName);
        }

        public void ofPartition(long timestamp) {
            longList.add(timestamp);
        }

        public void ofAddColumn(
                CharSequence columnName,
                int type,
                int symbolCapacity,
                boolean cache,
                boolean indexed,
                int indexValueBlockCapacity
        ) {
            assert columnName != null && columnName.length() > 0;
            objCharList.add(columnName);
            longList.add(type);
            longList.add(symbolCapacity);
            longList.add(cache ? 1 : -1);
            longList.add(indexed ? 1 : -1);
            longList.add(indexValueBlockCapacity);
        }

}