using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TinyPosEntity.Entity;
using TinyPosEntity.Service;

namespace TinyPosEntity
{
    public class EntityController
    {
        public static string ConnectionString { get; set; }

        private static EntityController instance;
        public static EntityController Instance { get { Init(); return instance; } }

        private EntityController(string connectionString)
        {
            EntityContext.ConnectionString = connectionString;
        }

        private static void Init()
        {
            if (string.IsNullOrEmpty(ConnectionString))
                throw new Exception("ConnectionString 값이 필요합니다.");

            if (instance == null)
                instance = new EntityController(ConnectionString);
        }

        public void InitializeDatabase()
        {
            Database.SetInitializer<EntityContext>(new EntityInitializer());

            using (EntityContext context = new EntityContext())
            {
                context.Database.CreateIfNotExists();
            }

            ProductTypeService.Instance.Create(GetDefaultProductTypes());
        }

        private List<ProductType> GetDefaultProductTypes()
        {
            List<ProductType> productTypeList = new List<ProductType>();
            productTypeList.Add(new ProductType() { Name = "담배" });
            productTypeList.Add(new ProductType() { Name = "주류" });
            productTypeList.Add(new ProductType() { Name = "음료" });
            productTypeList.Add(new ProductType() { Name = "과자" });
            productTypeList.Add(new ProductType() { Name = "식료품" });
            productTypeList.Add(new ProductType() { Name = "잡화" });
            productTypeList.Add(new ProductType() { Name = "기타" });

            return productTypeList;
        }
    }
}