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/**
 * Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 * 
 * Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 * 
 * 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.tinygroup.tinysqldsl;

import org.tinygroup.tinysqldsl.base.Condition;
import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;
import org.tinygroup.tinysqldsl.base.Table;
import org.tinygroup.tinysqldsl.expression.Expression;
import org.tinygroup.tinysqldsl.formitem.FromItem;
import org.tinygroup.tinysqldsl.formitem.FromItemList;
import org.tinygroup.tinysqldsl.select.Join;
import org.tinygroup.tinysqldsl.select.OrderByElement;
import org.tinygroup.tinysqldsl.select.PlainSelect;
import org.tinygroup.tinysqldsl.selectitem.AllColumns;
import org.tinygroup.tinysqldsl.selectitem.CustomSelectItem;
import org.tinygroup.tinysqldsl.selectitem.SelectItem;

/**
 * Created by luoguo on 2015/3/11.
 */
public class Select> extends StatementSqlBuilder implements
        Statement {

    protected PlainSelect plainSelect;
    private String id;

    protected Select() {
        super();
        plainSelect = new PlainSelect();
    }

    @SuppressWarnings("rawtypes")
    public static Select select(SelectItem... selectItems) {
        Select select = new Select();
        select.getPlainSelect().addSelectItems(selectItems);
        return select;
    }

    public static CustomSelectItem customSelectItem(String format,
                                                    SelectItem... selectItems) {
        return new CustomSelectItem(format, selectItems);
    }

    @SuppressWarnings("rawtypes")
    public static Select selectFrom(Table... tables) {
        Select select = new Select();
        select.getPlainSelect().addSelectItems(new AllColumns());
        select.getPlainSelect().setFromItem(new FromItemList(tables));
        return select;
    }

    public String getId() {
        return id;
    }

    public PlainSelect getPlainSelect() {
        return plainSelect;
    }

    public void setPlainSelect(PlainSelect plainSelect) {
        this.plainSelect = plainSelect;
    }

    @SuppressWarnings("unchecked")
    public T from(FromItem fromItem) {
        plainSelect.setFromItem(fromItem);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T from(FromItem... fromItems) {
        plainSelect.setFromItem(FromItemList.fromItems(fromItems));
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T join(Join... joins) {
        plainSelect.addJoins(joins);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T where(Condition condition) {
        plainSelect.setWhere(condition);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T groupBy(Expression... expressions) {
        plainSelect.addGroupByExpressions(expressions);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T orderBy(OrderByElement... orderByElements) {
        plainSelect.addOrderByElements(orderByElements);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T having(Condition condition) {
        plainSelect.setHaving(condition);
        return (T) this;
    }

    @SuppressWarnings("unchecked")
    public T forUpdate() {
        plainSelect.setForUpdate(true);
        return (T) this;
    }

    @Override
    public String toString() {
        return sql();
    }

    @Override
    protected void parserStatementBody() {
        build(plainSelect);
    }

    public void id(String id) {
        this.id = id;
    }

    public Select copy() {
        Select select = newSelect();
        select.plainSelect = PlainSelect.copy(this.plainSelect);
        return select;
    }

    protected Select newSelect() {
        return new Select();
    }

}