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/*
 * #%L
 * JSQLParser library
 * %%
 * Copyright (C) 2004 - 2017 JSQLParser
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */
package net.sf.jsqlparser.statement.upsert;

import java.util.List;

import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.operators.relational.ItemsList;
import net.sf.jsqlparser.schema.Column;
import net.sf.jsqlparser.schema.Table;
import net.sf.jsqlparser.statement.Statement;
import net.sf.jsqlparser.statement.StatementVisitor;
import net.sf.jsqlparser.statement.select.PlainSelect;
import net.sf.jsqlparser.statement.select.Select;

/**
 * The UPSERT INTO statement. This statement is basically the combination of
 * "insert" and "update". That means it will operate inserts if not present
 * and updates otherwise the value in the table. Note the values modified
 * will be either a list of values or a select statement.
 * 
 * 
 * Here is the documentation of the grammar of this operation:
 * http://phoenix.apache.org/language/#upsert_values
 * http://phoenix.apache.org/language/#upsert_select
 * 
 * @author messfish
 *
 */
public class Upsert implements Statement {

    private Table table;
    private List columns;
    private ItemsList itemsList;
    private boolean useValues = true;
    private Select select;
    private boolean useSelectBrackets = true;
    private boolean useDuplicate = false;
    private List duplicateUpdateColumns;
    private List duplicateUpdateExpressionList;

    @Override
    public void accept(StatementVisitor statementVisitor) {
        statementVisitor.visit(this); 
    }
    
    public void setTable(Table name) {
        table = name;
    }
    
    public Table getTable() {
        return table;
    }
    
    public void setColumns(List list) {
        columns = list;
    }
    
    public List getColumns() {
        return columns;
    }
    
    public void setItemsList(ItemsList list) {
        itemsList = list;
    }
    
    public ItemsList getItemsList() {
        return itemsList;
    }
    
    public void setUseValues(boolean useValues) {
        this.useValues = useValues;
    }
    
    public boolean isUseValues() {
        return useValues;
    }
    
    public void setSelect(Select select) {
        this.select = select;
    }
    
    public Select getSelect() {
        return select;
    }
    
    public void setUseSelectBrackets(boolean useSelectBrackets) {
        this.useSelectBrackets = useSelectBrackets;
    }
    
    public boolean isUseSelectBrackets() {
        return useSelectBrackets;
    }
    
    public void setUseDuplicate(boolean useDuplicate) {
        this.useDuplicate = useDuplicate;
    }
    
    public boolean isUseDuplicate() {
        return useDuplicate;
    }
    
    public void setDuplicateUpdateColumns(List duplicateUpdateColumns) {
        this.duplicateUpdateColumns = duplicateUpdateColumns;
    }
    
    public List getDuplicateUpdateColumns() {
        return duplicateUpdateColumns;
    }
    
    public void setDuplicateUpdateExpressionList(List duplicateUpdateExpressionList) {
        this.duplicateUpdateExpressionList = duplicateUpdateExpressionList;
    }
    
    public List getDuplicateUpdateExpressionList() {
        return duplicateUpdateExpressionList;
    }
    
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        
        sb.append("UPSERT INTO ");
        sb.append(table).append(" ");
        if (columns != null) {
            sb.append(PlainSelect.getStringList(columns, true, true)).append(" ");
        }
        if (useValues) {
            sb.append("VALUES ");
        }
        
        if (itemsList != null) {
            sb.append(itemsList);
        } else {
            if (useSelectBrackets) {
                sb.append("(");
            }
            if (select != null) {
                sb.append(select);
            }
            if (useSelectBrackets) {
                sb.append(")");
            }
        }

        if (useDuplicate) {
            sb.append(" ON DUPLICATE KEY UPDATE ");
            for (int i = 0; i < getDuplicateUpdateColumns().size(); i++) {
                if (i != 0) {
                    sb.append(", ");
                }
                sb.append(duplicateUpdateColumns.get(i)).append(" = ");
                sb.append(duplicateUpdateExpressionList.get(i));
            }
        }
        
        return sb.toString();
    }

}