/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * 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 org.teiid.translator.google;


import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.metadata.MetadataFactory;
import org.teiid.metadata.Table;
import org.teiid.translator.MetadataProcessor;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.TranslatorProperty;
import org.teiid.translator.TranslatorProperty.PropertyType;
import org.teiid.translator.TypeFacility;
import org.teiid.translator.google.api.GoogleSpreadsheetConnection;
import org.teiid.translator.google.api.metadata.Column;
import org.teiid.translator.google.api.metadata.SpreadsheetInfo;
import org.teiid.translator.google.api.metadata.Worksheet;
import org.teiid.util.FullyQualifiedName;

public class GoogleMetadataProcessor implements MetadataProcessor<GoogleSpreadsheetConnection>{
    
    private boolean allTypesUpdatable = true;
	
	/**
	 * Creates metadata from all spreadsheets in the user account. Table name
	 * consists of Spreadsheet name and worksheet name. Columns of the table are
	 * columns of the worksheet.
	 */
	public void process(MetadataFactory mf, GoogleSpreadsheetConnection conn) throws TranslatorException {
	    SpreadsheetInfo ssMetadata = conn.getSpreadsheetInfo();
		for (Worksheet worksheet : ssMetadata.getWorksheets()) {
			addTable(mf, worksheet);
		}
	}

	/**
	 * Adds new table to metadata.
	 * 
	 * @param spreadsheet  Name of the spreadsheet
	 * @param worksheet    Name of the worksheet
	 * @throws TranslatorException
	 */
	private void addTable(MetadataFactory mf, Worksheet worksheet) {
		if (worksheet.getColumnCount() == 0){
			return;
		}
		Table table = mf.addTable(worksheet.getName());
		table.setProperty(FQN, new FullyQualifiedName("worksheet", worksheet.getName()).toString()); //$NON-NLS-1$
		table.setNameInSource(worksheet.getName()); 
		if (worksheet.isHeaderEnabled()) {
            table.setSupportsUpdate(true);
        }
		addColumnsToTable(mf, table, worksheet);
	}
	
	/**
	 * Adds column to table
	 * 
	 * @param table      Teiid table
	 * @param worksheet  
	 * @throws TranslatorException
	 */
	private void addColumnsToTable(MetadataFactory mf, Table table, Worksheet worksheet) {
	    boolean updatable = true;
		for(Column column : worksheet.getColumnsAsList()){
			String type = null;
			switch(column.getDataType()){
			case DATE:
			    updatable = false;
				type = TypeFacility.RUNTIME_NAMES.DATE;
				break;
			case BOOLEAN:
				type = TypeFacility.RUNTIME_NAMES.BOOLEAN;
				break;
			case DATETIME:
			    updatable = false;
				type = TypeFacility.RUNTIME_NAMES.TIMESTAMP;
				break;
			case NUMBER:
			    updatable = false;
				type = TypeFacility.RUNTIME_NAMES.DOUBLE;
				break;
			case TIMEOFDAY:
			    updatable = false;
				type = TypeFacility.RUNTIME_NAMES.TIME;
				break;
			default:
				type = TypeFacility.RUNTIME_NAMES.STRING;
			}
			String name = column.getAlphaName();
			if (worksheet.isHeaderEnabled()) {
			    name = column.getLabel();
			    if (name == null) {
			        LogManager.logDetail(LogConstants.CTX_CONNECTOR, SpreadsheetExecutionFactory.UTIL.getString("missing_label", column.getAlphaName())); //$NON-NLS-1$
			        continue;
			    }
			}
			org.teiid.metadata.Column c = mf.addColumn(name, type, table);
			if (table.supportsUpdate()) {
			    c.setUpdatable(updatable || allTypesUpdatable);
			}
			c.setNameInSource(worksheet.isHeaderEnabled()?column.getLabel():column.getAlphaName());
			c.setNativeType(column.getDataType().name());
		}    
	}
	
    @TranslatorProperty (display="All Types Updatable", category=PropertyType.IMPORT, description="Allow all types to be updatable even those that may have formatting or locale inconsistencies.")
    public boolean isAllTypesUpdatable() {
        return allTypesUpdatable;
    }
    
    public void setAllTypesUpdatable(boolean allTypesUpdatable) {
        this.allTypesUpdatable = allTypesUpdatable;
    }
	
}
