using System;
using System.Collections;

using Zhaizj.Framework;
using Zhaizj.Framework.Log;
using System.Data;

namespace Zhaizj.Framework.ORM.Operation
{


    internal class FindAllOperation
    {

        private static readonly ILog logger = LogManager.GetLogger(typeof(FindAllOperation));

        public static IList FindAll(ObjectInfo state)
        {
            IList parentResults = findAllPrivate(state);
            if (state.EntityInfo.ChildEntityList.Count > 0)
            {
                return findAllFromChild(parentResults, state);
            }
            return parentResults;
        }

        public static DataTable FindDt(ObjectInfo state, string orderby)
        {
            String sql = "select * from " + state.EntityInfo.TableName + " order by " + orderby;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindDt]" + sql);
            return EntityPropertyUtil.FindDt(state, sql);
        }

        public static DataTable FindDt(ObjectInfo state)
        {
            String sql = "select * from " + state.EntityInfo.TableName;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindDt]" + sql);
            return EntityPropertyUtil.FindDt(state, sql);
        }


        public static int findMaxId(ObjectInfo state)
        {
            String sql = "select max(id) as id from " + state.EntityInfo.TableName;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindDt]" + sql);
            return EntityPropertyUtil.FindMaxId(state, sql);
        }

        public static DataTable FindDt(String condtion, ObjectInfo state, string orderby)
        {
            String sql = "select * from " + state.EntityInfo.TableName + " where " + condtion + " order by " + orderby;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindDt]" + sql);
            return EntityPropertyUtil.FindDt(state, sql);
        }
        public static DataTable FindDt(string fields, String condtion, ObjectInfo state, string orderby)
        {
            String sql = "select " + fields + " from " + state.EntityInfo.TableName + " where " + condtion + " order by " + orderby;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindDt]" + sql);
            return EntityPropertyUtil.FindDt(state, sql);
        }



        private static IList findAllPrivate(ObjectInfo state)
        {

            String sql = "select * from " + state.EntityInfo.TableName;
            logger.Info(LoggerUtil.SqlPrefix + "[" + state.EntityInfo.Name + "_FindAll]" + sql);

            return EntityPropertyUtil.FindList(state, sql);
        }

        private static IList findAllFromChild(IList parents, ObjectInfo state)
        {

            ArrayList results = new ArrayList();

            foreach (EntityInfo info in state.EntityInfo.ChildEntityList)
            {

                ObjectInfo childState = new ObjectInfo(info);
                childState.includeAll();
                IList children = ObjectDB.FindAll(childState);

                for (int i = 0; i < children.Count; i++)
                {
                    IEntity child = children[i] as IEntity;
                    // state
                    //child.state.Order = state.Order;
                    results.Add(child);
                    parents.RemoveAt(Query.getIndexOfObject(parents, child));
                }

            }

            if (parents.Count > 0) results.AddRange(parents);
            results.Sort();

            return results;
        }

    }
}