using IWareDataAccess.EF;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IWareDataAccess.Helper
{
    public static class SearchHelper
    {
        /// <summary>
        /// 
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="edm"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pagecount"></param>
        /// <param name="totalNum"></param>
        /// <param name="parm"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public static List<T> GetSearchData<T>(Model edm, int pageIndex, int pagecount, out int totalNum, Dictionary<string, object> parm, T t)
        {
            try
            {

                string className = t.GetType().Name;
                var sqlParamsCount = new List<SqlParameter>();
                var sqlParamsData = new List<SqlParameter>();
                string sqlCount = "SELECT COUNT(*) FROM  {0} WHERE 1=1";
                sqlCount = string.Format(sqlCount, className);
                string sqlData = "SELECT * FROM (SELECT *, ROW_NUMBER() OVER (ORDER BY id ) AS ROWNUM from {0} where 1=1";
                sqlData = string.Format(sqlData, className);
                if (parm.Count > 0)
                {
                    if (!parm.Keys.Contains("?"))
                    {
                        bool bl = true;
                        foreach (var key in parm.Keys)
                        {
                            if (parm[key] != null && !string.IsNullOrEmpty(parm[key] + ""))
                            {

                                object pi = parm[key];
                                Type ti = pi.GetType();
                                string iname = ti.Name;
                                if (iname == "String")
                                {
                                    sqlParamsCount.Add(new SqlParameter("@S_" + key, "%" + parm[key] + "%"));
                                    sqlParamsData.Add(new SqlParameter("@S_" + key, "%" + parm[key] + "%"));
                                    sqlCount += string.Format(" AND {0} LIKE {1}", key, "@S_" + key);
                                    sqlData += string.Format(" AND {0} LIKE {1}", key, "@S_" + key);
                                }
                                else if (iname == "Int32")
                                {
                                    sqlParamsCount.Add(new SqlParameter("@S_" + key, parm[key]));
                                    sqlParamsData.Add(new SqlParameter("@S_" + key, parm[key]));
                                    sqlCount += string.Format(" AND {0} = {1}", key, "@S_" + key);
                                    sqlData += string.Format(" AND {0} = {1}", key, "@S_" + key);
                                }
                                else if (iname == "DateTime")
                                {
                                    if (bl)
                                    {
                                        sqlParamsCount.Add(new SqlParameter("@S_" + key, parm[key]));
                                        sqlParamsData.Add(new SqlParameter("@S_" + key, parm[key]));
                                        sqlCount += string.Format(" AND {0} >= {1}", key, "@S_" + key);
                                        sqlData += string.Format(" AND {0} >= {1}", key, "@S_" + key);
                                        bl = false;
                                    }
                                    else
                                    {
                                        sqlParamsCount.Add(new SqlParameter("@S_" + key, parm[key]));
                                        sqlParamsData.Add(new SqlParameter("@S_" + key, parm[key]));
                                        sqlCount += string.Format(" AND {0} <= {1}", key, "@S_" + key);
                                        sqlData += string.Format(" AND {0} <= {1}", key, "@S_" + key);
                                    }
                                }
                            }
                        }
                    }
                }
                pageIndex = pageIndex < 1 ? 1 : pageIndex;
                pagecount = pagecount < 1 ? 10 : pagecount;
                sqlParamsData.Add(new SqlParameter("@PI_Start", (pageIndex - 1) * pagecount + 1));
                sqlParamsData.Add(new SqlParameter("@PI_End", pageIndex * pagecount));
                sqlData += string.Format(") t Where t.ROWNUM   between {0} and {1} ", "@PI_Start", "@PI_End");
                totalNum = edm.Database.SqlQuery<int>(sqlCount, sqlParamsCount.ToArray()).ToList()[0];
                var datas = edm.Database.SqlQuery<T>(sqlData, sqlParamsData.ToArray()).ToList();
                if (datas != null)
                {

                    return datas;
                }
                else
                {
                    return new List<T>();
                }

            }
            catch (Exception ex)
            {
                totalNum = 0;

                return new List<T>();
            }
        }

    }
}