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/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * 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 studio.raptor.sqlparser.ast.statement;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import studio.raptor.sqlparser.ast.SQLName;
import studio.raptor.sqlparser.ast.SQLStatementImpl;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

public class SQLCreateTableStatement extends SQLStatementImpl implements SQLDDLStatement {

  protected boolean ifNotExiists = false;
  protected Type type;
  protected SQLExprTableSource tableSource;

  protected List tableElementList = new ArrayList();
  protected SQLSelect select;
  // for postgresql
  private SQLExprTableSource inherits;

  public SQLCreateTableStatement() {

  }

  public SQLCreateTableStatement(String dbType) {
    super(dbType);
  }

  public SQLName getName() {
    if (tableSource == null) {
      return null;
    }

    return (SQLName) tableSource.getExpr();
  }

  public void setName(SQLName name) {
    this.setTableSource(new SQLExprTableSource(name));
  }

  public SQLExprTableSource getTableSource() {
    return tableSource;
  }

  public void setTableSource(SQLExprTableSource tableSource) {
    if (tableSource != null) {
      tableSource.setParent(this);
    }
    this.tableSource = tableSource;
  }

  public Type getType() {
    return type;
  }

  public void setType(Type type) {
    this.type = type;
  }

  public List getTableElementList() {
    return tableElementList;
  }

  public boolean isIfNotExiists() {
    return ifNotExiists;
  }

  public void setIfNotExiists(boolean ifNotExiists) {
    this.ifNotExiists = ifNotExiists;
  }

  public SQLExprTableSource getInherits() {
    return inherits;
  }

  public void setInherits(SQLExprTableSource inherits) {
    if (inherits != null) {
      inherits.setParent(this);
    }
    this.inherits = inherits;
  }

  public SQLSelect getSelect() {
    return select;
  }

  public void setSelect(SQLSelect select) {
    this.select = select;
  }

  @Override
  protected void accept0(SQLASTVisitor visitor) {
    if (visitor.visit(this)) {
      this.acceptChild(visitor, tableSource);
      this.acceptChild(visitor, tableElementList);
      this.acceptChild(visitor, inherits);
      this.acceptChild(visitor, select);
    }
    visitor.endVisit(this);
  }

  @SuppressWarnings("unchecked")
  public void addBodyBeforeComment(List comments) {
    if (attributes == null) {
      attributes = new HashMap(1);
    }

    List attrComments = (List) attributes.get("format.body_before_comment");
    if (attrComments == null) {
      attributes.put("format.body_before_comment", comments);
    } else {
      attrComments.addAll(comments);
    }
  }

  @SuppressWarnings("unchecked")
  public List getBodyBeforeCommentsDirect() {
    if (attributes == null) {
      return null;
    }

    return (List) attributes.get("format.body_before_comment");
  }

  public boolean hasBodyBeforeComment() {
    List comments = getBodyBeforeCommentsDirect();
    if (comments == null) {
      return false;
    }

    return !comments.isEmpty();
  }

  public static enum Type {
    GLOBAL_TEMPORARY, LOCAL_TEMPORARY
  }

}