using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace Bro.Process.DataBase
{
    public class BaseModel
    {
        /// <summary>
        /// 编号，唯一值,使用GUID
        /// </summary>
        [Key]
        [Required(ErrorMessage = "编号不可为空！")]
        [StringLength(64)]
        public string ID { get; set; } = Guid.NewGuid().ToString().ToUpper();

        /// <summary>
        /// 禁用状态 0 未禁用 1 已禁用
        /// </summary>
        [Required]
        public int IS_DISABLED { get; set; } = 0;

        /// <summary>
        /// 删除状态 0 未删除 1 已删除
        /// </summary>
        [Required]
        public int IS_DELETED { get; set; } = 0;

        /// <summary>
        /// 创建人信息
        /// </summary>
        //[Required]
        [StringLength(64)]
        public string CREATE_USER { get; set; }

        /// <summary>
        /// 创建时间
        /// </summary>
        //[Required]
        public DateTime? CREATE_TIME { get; set; } = DateTime.Now;

        /// <summary>
        /// 更新人信息
        /// </summary>
        [StringLength(64)]
        public string UPDATE_USER { get; set; }

        /// <summary>
        /// 更新时间
        /// </summary>
        public DateTime? UPDATE_TIME { get; set; }
    }

    public static class BaseModelHelper
    {
        public static void SetNew<T>(this T t, string userId) where T : BaseModel
        {
            t.CREATE_USER = userId;
            t.CREATE_TIME = DateTime.Now;
        }

        public static void SetUpdate<T>(this T t, string userId) where T : BaseModel
        {
            t.UPDATE_USER = userId;
            t.UPDATE_TIME = DateTime.Now;
        }

        static List<string> NoTransferProps = new List<string>() { "ID", "CREATE_USER", "CREATE_TIME", "UPDATE_USER", "UPDATE_TIME", "IS_DELETED" };
        public static void DataTransfer<T>(this T destT, T sourceT) where T : BaseModel
        {
            destT.DataFrom(sourceT, NoTransferProps);
        }

        public static void DataFrom<T1, T2>(this T1 destT, T2 sourceT, List<string> exceptionProps = null) where T1 : class where T2 : class
        {
            PropertyInfo[] propDest = destT.GetType().GetProperties().Where(p => !(p.GetMethod.IsVirtual && !p.GetMethod.IsFinal)).ToArray();
            PropertyInfo[] propSource = sourceT.GetType().GetProperties();

            Array.ForEach(propDest, prop =>
            {
                if (exceptionProps == null || !exceptionProps.Contains(prop.Name))
                {
                    if (prop.CanWrite)
                    {
                        PropertyInfo propS = propSource.FirstOrDefault(p => p.Name == prop.Name);
                        if (propS != null && propS.CanRead)
                        {
                            prop.SetValue(destT, propS.GetValue(sourceT));
                        }
                    }
                }
            });
        }

        public static List<T> ToPagedList<T>(this IQueryable<T> orderQuery, BaseRequest request) where T : class
        {
            return orderQuery.Skip((request.PageNum - 1) * request.PageSize).Take(request.PageSize).ToList();
        }
    }

    public class BaseRequest : INotifyPropertyChanged
    {

        private int pageNum = 1;
        /// <summary>
        /// 查询结果页数
        /// </summary>
        public int PageNum
        {
            get => pageNum;
            set
            {
                if (pageNum != value)
                {
                    pageNum = value;
                    PropertyChanged?.BeginInvoke(this, new PropertyChangedEventArgs("PageNum"), null, null);
                }
            }
        }

        private int pageSize = 100;
        /// <summary>
        /// 每页的查询结果条数
        /// </summary>
        public int PageSize
        {
            get => pageSize;
            set
            {
                if (pageSize != value)
                {
                    pageSize = value;
                    PropertyChanged?.BeginInvoke(this, new PropertyChangedEventArgs("PageSize"), null, null);
                }
            }
        }

        /// <summary>
        /// 查询起始时间
        /// </summary>
        public DateTime? StartTime { get; set; }

        /// <summary>
        /// 查询结束时间
        /// </summary>
        public DateTime? EndTime { get; set; }

        /// <summary>
        /// 启用状态过滤器 1：仅未启用 0：仅启用 -1：全部
        /// </summary>
        public int DisableFilter { get; set; } = 0;

        /// <summary>
        /// 查询字符串
        /// </summary>
        public string SearchTxt { get; set; }

        private int totalNum = 0;
        /// <summary>
        /// 数据总数
        /// </summary>
        public int TotalNum
        {
            get => totalNum;
            set
            {
                if (totalNum != value)
                {
                    totalNum = value;
                    PropertyChanged?.BeginInvoke(this, new PropertyChangedEventArgs("TotalNum"), null, null);
                }
                TotalPage = (int)Math.Ceiling((double)TotalNum / PageSize);
            }
        }

        private int totalPage = 0;
        /// <summary>
        /// 总页数
        /// </summary>
        public int TotalPage
        {
            get => totalPage;
            set
            {
                if (totalPage != value)
                {
                    totalPage = value;
                    PropertyChanged?.BeginInvoke(this, new PropertyChangedEventArgs("TotalPage"), null, null);
                }
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}