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/*
 * Beangle, Agile Java/Scala Development Scaffold and Toolkit
 *
 * Copyright (c) 2005-2013, Beangle Software.
 *
 * Beangle 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 3 of the License, or
 * (at your option) any later version.
 *
 * Beangle 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Beangle.  If not, see .
 */
package org.beangle.struts2.action;

import java.lang.reflect.Array;
import java.util.Map;

import org.beangle.commons.collection.page.PageLimit;
import org.beangle.commons.dao.query.builder.OqlBuilder;
import org.beangle.commons.entity.Entity;
import org.beangle.commons.entity.metadata.Model;
import org.beangle.commons.lang.Arrays;
import org.beangle.commons.lang.Assert;
import org.beangle.commons.lang.Strings;
import org.beangle.struts2.helper.Params;
import org.beangle.struts2.helper.PopulateHelper;
import org.beangle.struts2.helper.QueryHelper;

/**
 * @author chaostone
 * @since 3.0.0
 */
public class EntityActionSupport extends ActionSupport {

  /**
   * Get entity's id from shortname.id,shortnameId,id
   * 
   * @param name
   * @param clazz
   */
  protected final  T getId(String name, Class clazz) {
    Object[] entityIds = getAll(name + ".id");
    if (Arrays.isEmpty(entityIds)) entityIds = getAll(name + "Id");
    if (Arrays.isEmpty(entityIds)) entityIds = getAll("id");
    if (Arrays.isEmpty(entityIds)) return null;
    else {
      String entityId = entityIds[0].toString();
      int commaIndex = entityId.indexOf(',');
      if (commaIndex != -1) entityId = entityId.substring(0, commaIndex);
      return Params.converter.convert(entityId, clazz);
    }
  }

  protected final Integer getIntId(String shortName) {
    return getId(shortName, Integer.class);
  }

  protected final Long getLongId(String shortName) {
    return getId(shortName, Long.class);
  }

  /**
   * Get entity's long id array from parameters shortname.id,shortname.ids,shortnameIds
   * 
   * @param shortName
   */
  protected final Long[] getLongIds(String shortName) {
    return getIds(shortName, Long.class);
  }

  /**
   * Get entity's long id array from parameters shortname.id,shortname.ids,shortnameIds
   * 
   * @param shortName
   */
  protected final Integer[] getIntIds(String shortName) {
    return getIds(shortName, Integer.class);
  }

  /**
   * Get entity's id array from parameters shortname.id,shortname.ids,shortnameIds
   * 
   * @param name
   * @param clazz
   * @return empty array if not found
   */
  protected final  T[] getIds(String name, Class clazz) {
    T[] datas = Params.getAll(name + ".id", clazz);
    if (null == datas) {
      String datastring = Params.get(name + ".ids");
      if (null == datastring) datastring = Params.get(name + "Ids");
      if (null == datastring) Array.newInstance(clazz, 0);
      else return Params.converter.convert(Strings.split(datastring, ","), clazz);
    }
    return datas;
  }

  // populate------------------------------------------------------------------
  /**
   * 将request中的参数设置到clazz对应的bean。
   * 
   * @param clazz
   * @param shortName
   */
  protected final  T populate(Class clazz, String shortName) {
    return PopulateHelper.populate(clazz, shortName);
  }

  protected final void populate(Object obj, String shortName) {
    Model.populate(obj, Params.sub(shortName));
  }

  protected final Object populate(Class clazz) {
    return PopulateHelper.populate(clazz);
  }

  protected final Object populate(String entityName) {
    return PopulateHelper.populate(entityName);
  }

  protected final Object populate(String entityName, String shortName) {
    return PopulateHelper.populate(entityName, shortName);
  }

  protected final Object populate(Object obj, String entityName, String shortName) {
    return PopulateHelper.populate(obj, entityName, shortName);
  }

  protected final void populate(Entity entity, String entityName, Map params) {
    Assert.notNull(entity, "Cannot populate to null.");
    Model.getPopulator().populate(entity, Model.getType(entityName), params);
  }

  protected final void populate(Entity entity, Map params) {
    Assert.notNull(entity, "Cannot populate to null.");
    Model.populate(entity, params);
  }

  // query------------------------------------------------------
  protected final int getPageNo() {
    return QueryHelper.getPageNo();
  }

  protected final int getPageSize() {
    return QueryHelper.getPageSize();
  }

  /**
   * 从request的参数或者cookie中(参数优先)取得分页信息
   */
  protected final PageLimit getPageLimit() {
    return QueryHelper.getPageLimit();
  }

  protected final void populateConditions(OqlBuilder builder) {
    QueryHelper.populateConditions(builder);
  }

  protected final void populateConditions(OqlBuilder builder, String exclusiveAttrNames) {
    QueryHelper.populateConditions(builder, exclusiveAttrNames);
  }

}