using AutoMapper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TTSW.EF;
using TTSW.Utils;
using TTSW.Constant;
using TTSW.Common;
using TodoAPI2.Models;
using System.IO;
using System.Web;
using System.Net;
using TTSW.Configure;
using Microsoft.Extensions.Options;
using System.Data;
using Npgsql;

namespace TodoAPI2.Models
{
    public class external_employeeService : Iexternal_employeeService
    {
        private IMyDatabase db;

        public external_employeeService(IMyDatabase mydb)
        {
			db = mydb;
        }

        public int? GetLeader(int? emp_id)
        {
            var sql = @"
SELECT ha.employee_id as emp_id, 
CONCAT(hta.title_name,ha.firstname,' ',ha.lastname) as emp_name, 
ha.chief_id,
CONCAT(htb.title_name,hb.firstname,' ',hb.lastname) as chief_name
FROM public.hrm_employees as ha 
left join public.hrm_employees as hb on hb.employee_id = ha.chief_id
left join public.hrm_title_masters as hta on hta.id = ha.prefix_card_name
left join public.hrm_title_masters as htb on hb.prefix_card_name = htb.id
where ha.employee_id = @emp_id and ha.workingstatus = 'สถานะปฏิบัติงาน';
";
            var para = db.GetParameterListNpgsql();

            var ix = new NpgsqlParameter("emp_id", DbType.Int32);
            ix.Value = emp_id;
            para.Add(ix);

            DataTable dt = db.ExecuteDataTableNpgsql(sql, para);

            if (dt.Rows.Count == 1)
            {
                if(dt.Rows[0]["chief_id"] == DBNull.Value)
                {
                    return null;
                }
                else
                {
                    return Convert.ToInt32(dt.Rows[0]["chief_id"]);
                }                
            }            

            return null;
        }

        public List<external_employeeViewModel> GetListByemployee_type(int? employee_type, int? position_type)
        {
            var sql = string.Format(@"
select he.employee_id as id, mpn.position_number,he.employee_no,he.position_no,
CONCAT(htm.title_name,' ',he.firstname,' ',he.lastname) as fullname,opd.position_name, 
orgdata.id as department_id,orgdata.department_name,orgdata.department_code,he.salary,
he.employee_type_id, het.employee_type_name,
u.email as user_email, u.id as user_id,hpl.position_level_name,hpl.position_level_id
from public.hrm_employees as he
left join public.hrm_position_levels as hpl on he.position_level_id = hpl.id 
left join public.mpp_position_numbers as mpn on he.position_no = mpn.id 
left join public.org_position_datas as opd on opd.position_id = mpn.position_id
left join public.hrm_title_masters as htm on htm.id = he.prefix_card_name
left join public.{0}DepartmentData{0} as orgdata on orgdata.id = he.department_id
left join public.hrm_employee_types as het on het.id = he.employee_type_id
left join public.users as u on u.employee_id = he.employee_id
where he.workingstatus = 'สถานะปฏิบัติงาน' and he.deleted_at is null and mpn.deleted_at is null 
and opd.deleted_at is null and htm.deleted_at is null;
", '"'.ToString());
            var para = db.GetParameterListNpgsql();
            DataTable dt = db.ExecuteDataTableNpgsql(sql, para);
            var result = new List<external_employeeViewModel>();
            foreach (DataRow dr in dt.Rows)
            {
                var i = new external_employeeViewModel();
                i.id = Convert.ToInt32(dr["id"]);
                i.position_number = dr["position_number"].ToString();
                i.position_name = dr["position_name"].ToString();
                i.fullname= dr["fullname"].ToString();
                if(dr["employee_type_id"] != DBNull.Value)
                {
                    i.employee_type_id = Convert.ToInt32(dr["employee_type_id"]);
                    i.employee_type_name = dr["employee_type_name"].ToString();
                }
                i.position_type_id = null;
                if (dr["user_id"] != DBNull.Value)
                {
                    i.user_email = dr["user_email"].ToString();
                    i.user_id = Convert.ToInt32(dr["user_id"]);
                }
                if (dr["department_id"] != DBNull.Value)
                {
                    i.department_id = Convert.ToInt32(dr["department_id"]);
                    i.department_name = dr["department_name"].ToString();
                    i.department_code = dr["department_code"].ToString();
                }
                if(dr["employee_no"] != DBNull.Value)
                {
                    i.employee_no = dr["employee_no"].ToString();
                }
                if (dr["position_level_id"] != DBNull.Value)
                {
                    i.position_level_id = Convert.ToInt32(dr["department_id"]);
                    i.position_level_text = dr["position_level_name"].ToString();
                }

                result.Add(i);
            }
            return result;
        }

        public external_employeeViewModel GetEmployeeForLogin(int? user_id)
        {
            var sql = @"
select he.employee_id as id, mpn.position_number, opd.position_name, 
CONCAT(htm.title_name,' ',he.firstname,' ',he.lastname) as fullname,
u.email as user_email, u.id as user_id
from public.hrm_employees as he
left join public.mpp_position_numbers as mpn on he.position_no = mpn.id 
left join public.org_position_datas as opd on opd.position_id = mpn.position_id
left join public.hrm_title_masters as htm on htm.id = he.prefix_card_name
left join public.users as u on u.employee_id = he.employee_id
where he.workingstatus = 'สถานะปฏิบัติงาน' and he.deleted_at is null and mpn.deleted_at is null 
and opd.deleted_at is null and htm.deleted_at is null
and u.id=@user_id;
";
            var para = db.GetParameterListNpgsql();
            var ix = new NpgsqlParameter("user_id", DbType.Int32);
            ix.Value = user_id;
            para.Add(ix);

            DataTable dt = db.ExecuteDataTableNpgsql(sql, para);
            var result = new List<external_employeeViewModel>();
            foreach (DataRow dr in dt.Rows)
            {
                var i = new external_employeeViewModel();
                i.id = Convert.ToInt32(dr["id"]);
                i.position_number = dr["position_number"].ToString();
                i.position_name = dr["position_name"].ToString();
                i.fullname = dr["fullname"].ToString();
                i.employee_type_id = null;
                i.position_type_id = null;
                if(dr["user_id"] != DBNull.Value)
                {
                    i.user_email = dr["user_email"].ToString();
                    i.user_id = Convert.ToInt32(dr["user_id"]);
                }                

                result.Add(i);
            }
            if (result.Count == 1)
            {
                return result[0];
            }
            else
            {
                return null;
            }
        }

        public external_employeeWithSelectionViewModel GetBlankItem()
        {
            var i = new external_employeeWithSelectionViewModel();
            //var j = Mapper.Map<List<eva_performance_criteriaViewModel>>((from x in epc.GetListALLeva_performance_criteria() select x));
            //i.eva_performance_criteria_id = j;

            return i;
        }
    }
}