/*
 * Copyright 2008 the original author or authors.
 * 
 * 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.wamblee.usermgt.hibernate;

import java.io.IOException;
import java.util.Map;
import java.util.Properties;
import java.util.TreeMap;

import javax.sql.DataSource;

import org.springframework.core.io.ClassPathResource;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.wamblee.system.core.AbstractComponent;
import org.wamblee.system.core.DefaultProvidedInterface;
import org.wamblee.system.core.ProvidedInterface;
import org.wamblee.system.core.RequiredInterface;
import org.wamblee.system.core.Scope;
import org.wamblee.system.spring.SpringComponent;
import org.wamblee.system.spring.component.ORMappingConfig;
import org.wamblee.system.spring.component.ORMappingConfig.DatabaseType;

public class ExternalDatasourceComponent extends AbstractComponent<DataSource> {

    private static final String DATABASE_PROPERTIES = "properties/test.org.wamblee.security.database.properties";
   
    private static ProvidedInterface DATASOURCE =  new DefaultProvidedInterface("datasource",
            DataSource.class);
    private static ProvidedInterface ORM_CONFIG = new DefaultProvidedInterface("ormconfig",
            ORMappingConfig.class);

    private Properties _dbProps;
   
    public ExternalDatasourceComponent(String aName) throws IOException {
        this(aName, loadProperties());
    }

    private static Properties loadProperties() throws IOException {
        Properties dbProps = new Properties();
        dbProps.load(new ClassPathResource(DATABASE_PROPERTIES)
                .getInputStream());
        return dbProps;
    }
    
    public ExternalDatasourceComponent(String aName, Properties aProps) throws IOException {
        super(aName);
        _dbProps = aProps;
        
        addProvidedInterface(DATASOURCE);
        addProvidedInterface(ORM_CONFIG);
    }


    @Override
    protected DataSource doStart(Scope aScope) {
        DriverManagerDataSource ds = new DriverManagerDataSource(
                _dbProps.getProperty("database.driver"),
                _dbProps.getProperty("database.url"), 
                _dbProps.getProperty("database.username"),
                _dbProps.getProperty("database.password"));
       addInterface(DATASOURCE, ds, aScope);
       DatabaseType type = DatabaseType.valueOf(_dbProps.getProperty("database.type"));
       
       ORMappingConfig config = new ORMappingConfig(true, type);
       
       addInterface(ORM_CONFIG, config, aScope);
       
       return ds; 
    }

    @Override
    protected void doStop(DataSource aRuntime) {
       // Empty.
    }
}