using Bootstrap.Security;
using Bootstrap.Security.DataAccess;
using Longbow.Security.Cryptography;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Bootstrap.DataAccess
{
    /// <summary>
    /// 用户表实体类
    /// </summary>
    public class User : BootstrapUser
    {
        /// <summary>
        /// 获得/设置 用户主键ID
        /// </summary>
        public string Id { get; set; }

        /// <summary>
        /// 获取/设置 密码
        /// </summary>
        public string Password { get; set; }

        /// <summary>
        /// 获取/设置 密码盐
        /// </summary>
        public string PassSalt { get; set; }

        /// <summary>
        /// 获取/设置 角色用户关联状态 checked 标示已经关联 '' 标示未关联
        /// </summary>
        public string Checked { get; set; }

        /// <summary>
        /// 获得/设置 用户注册时间
        /// </summary>
        public DateTime RegisterTime { get; set; }

        /// <summary>
        /// 获得/设置 用户被批复时间
        /// </summary>
        public DateTime? ApprovedTime { get; set; }

        /// <summary>
        /// 获得/设置 用户批复人
        /// </summary>
        public string ApprovedBy { get; set; }

        /// <summary>
        /// 获得/设置 用户的申请理由
        /// </summary>
        public string Description { get; set; }

        /// <summary>
        /// 获得/设置 用户当前状态 0 表示管理员注册用户 1 表示用户注册 2 表示更改密码 3 表示更改个人皮肤 4 表示更改显示名称 5 批复新用户注册操作
        /// </summary>
        public UserStates UserStatus { get; set; }

        /// <summary>
        /// 获得/设置 通知描述 2分钟内为刚刚
        /// </summary>
        public string Period { get; set; }

        /// <summary>
        /// 获得/设置 新密码
        /// </summary>
        public string NewPassword { get; set; }

        /// <summary>
        /// 验证用户登陆账号与密码正确
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        public virtual bool Authenticate(string userName, string password)
        {
            var user = DbManager.Db.SingleOrDefault<User>("select Password, PassSalt from Users where ApprovedTime is not null and UserName = @0", userName);

            return !string.IsNullOrEmpty(user.PassSalt) && user.Password == LgbCryptography.ComputeHash(password, user.PassSalt);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        /// <param name="newPass"></param>
        /// <returns></returns>
        public virtual bool ChangePassword(string userName, string password, string newPass)
        {
            bool ret = false;
            if (Authenticate(userName, password))
            {
                string sql = "set Password = @0, PassSalt = @1 where UserName = @2";
                var passSalt = LgbCryptography.GenerateSalt();
                var newPassword = LgbCryptography.ComputeHash(newPass, passSalt);
                ret = DbManager.Db.Update<User>(sql, newPassword, passSalt, userName) == 1;
            }
            return ret;
        }

        /// <summary>
        /// 查询所有用户
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public virtual IEnumerable<User> Retrieves() => DbManager.Db.Fetch<User>("select ID, UserName, DisplayName, RegisterTime, ApprovedTime, ApprovedBy, Description from Users Where ApprovedTime is not null");

        /// <summary>
        /// 查询所有的新注册用户
        /// </summary>
        /// <returns></returns>
        public virtual IEnumerable<User> RetrieveNewUsers() => DbManager.Db.Fetch<User>("select ID, UserName, DisplayName, RegisterTime, Description from Users Where ApprovedTime is null order by RegisterTime desc");

        /// <summary>
        /// 删除用户
        /// </summary>
        /// <param name="value"></param>
        public virtual bool Delete(IEnumerable<string> value)
        {
            bool ret = false;
            var db = DbManager.Db;
            try
            {
                var ids = string.Join(",", value);
                db.BeginTransaction();
                db.Execute($"Delete from UserRole where UserID in ({ids})");
                db.Execute($"delete from UserGroup where UserID in ({ids})");
                db.Execute($"delete from Users where ID in ({ids})");
                db.CompleteTransaction();
                ret = true;
            }
            catch (Exception ex)
            {
                db.AbortTransaction();
                throw ex;
            }
            return ret;
        }

        /// <summary>
        /// 新建前台User View调用/注册用户调用
        /// </summary>
        /// <param name="p"></param>
        /// <returns></returns>
        public virtual bool Save(User p)
        {
            var ret = false;
            if (string.IsNullOrEmpty(p.Id) && p.Description.Length > 500) p.Description = p.Description.Substring(0, 500);
            if (p.UserName.Length > 50) p.UserName = p.UserName.Substring(0, 50);
            p.PassSalt = LgbCryptography.GenerateSalt();
            p.Password = LgbCryptography.ComputeHash(p.Password, p.PassSalt);
            p.RegisterTime = DateTime.Now;

            var db = DbManager.Db;
            try
            {
                db.BeginTransaction();
                if (!db.Exists<User>("where UserName = @0", p.UserName))
                {
                    db.Insert(p);
                    db.Execute("insert into UserRole (UserID, RoleID) select ID, (select ID from Roles where RoleName = 'Default') RoleId from Users where UserName = @0", p.UserName);
                }
                db.CompleteTransaction();
                ret = true;
            }
            catch (Exception ex)
            {
                db.AbortTransaction();
                throw ex;
            }
            return ret;
        }

        /// <summary>
        /// User List 视图保存按钮调用
        /// </summary>
        /// <param name="id"></param>
        /// <param name="password"></param>
        /// <param name="displayName"></param>
        /// <returns></returns>
        public virtual bool Update(string id, string password, string displayName)
        {
            var passSalt = LgbCryptography.GenerateSalt();
            var newPassword = LgbCryptography.ComputeHash(password, passSalt);
            return DbManager.Db.Update<User>("set Password = @1, PassSalt = @2, DisplayName = @3 where ID = @0", id, newPassword, passSalt, displayName) == 1;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <param name="approvedBy"></param>
        /// <returns></returns>
        public virtual bool Approve(string id, string approvedBy) => DbManager.Db.Update<User>("set ApprovedTime = @1, ApprovedBy = @2 where ID = @0", id, DateTime.Now, approvedBy) == 1;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="id"></param>
        /// <param name="rejectBy"></param>
        /// <returns></returns>
        public virtual bool Reject(string id, string rejectBy)
        {
            var ret = false;
            var db = DbManager.Db;
            try
            {
                db.BeginTransaction();
                db.Execute("insert into RejectUsers (UserName, DisplayName, RegisterTime, RejectedBy, RejectedTime, RejectedReason) select UserName, DisplayName, Registertime, @1, @2, @3 from Users where ID = @0", id, rejectBy, DateTime.Now, "未填写");
                db.Execute("delete from UserRole where UserId = @0", id);
                db.Execute("delete from UserGroup where UserId = @0", id);
                db.Execute("delete from users where ID = @0", id);
                db.CompleteTransaction();
                ret = true;
            }
            catch (Exception ex)
            {
                db.AbortTransaction();
                throw ex;
            }
            return ret;
        }

        /// <summary>
        /// 通过roleId获取所有用户
        /// </summary>
        /// <param name="roleId"></param>
        /// <returns></returns>
        public virtual IEnumerable<User> RetrievesByRoleId(string roleId) => DbManager.Db.Fetch<User>("select u.ID, u.UserName, u.DisplayName, case ur.UserID when u.ID then 'checked' else '' end Checked from Users u left join UserRole ur on u.ID = ur.UserID and RoleID = @0 where u.ApprovedTime is not null", roleId);

        /// <summary>
        /// 通过角色ID保存当前授权用户（插入）
        /// </summary>
        /// <param name="roleId">角色ID</param>
        /// <param name="userIds">用户ID数组</param>
        /// <returns></returns>
        public virtual bool SaveByRoleId(string roleId, IEnumerable<string> userIds)
        {
            bool ret = false;
            var db = DbManager.Db;
            try
            {
                db.BeginTransaction();
                //删除用户角色表该角色所有的用户
                db.Execute("delete from UserRole where RoleID = @0", roleId);
                db.InsertBulk("UserRole", userIds.Select(g => new { UserID = g, RoleID = roleId }));
                db.CompleteTransaction();
                ret = true;
            }
            catch (Exception ex)
            {
                db.AbortTransaction();
                throw ex;
            }
            return ret;
        }

        /// <summary>
        /// 通过groupId获取所有用户
        /// </summary>
        /// <param name="groupId"></param>
        /// <returns></returns>
        public virtual IEnumerable<User> RetrievesByGroupId(string groupId) => DbManager.Db.Fetch<User>("select u.ID, u.UserName, u.DisplayName, case ur.UserID when u.ID then 'checked' else '' end Checked from Users u left join UserGroup ur on u.ID = ur.UserID and GroupID = @0 where u.ApprovedTime is not null", groupId);

        /// <summary>
        /// 通过部门ID保存当前授权用户（插入）
        /// </summary>
        /// <param name="groupId">GroupID</param>
        /// <param name="userIds">用户ID数组</param>
        /// <returns></returns>
        public virtual bool SaveByGroupId(string groupId, IEnumerable<string> userIds)
        {
            bool ret = false;
            var db = DbManager.Db;
            try
            {
                db.BeginTransaction();
                //删除用户角色表该角色所有的用户
                db.Execute("delete from UserGroup where GroupID = @0", groupId);
                db.InsertBulk("UserGroup", userIds.Select(g => new { UserID = g, GroupID = groupId }));
                db.CompleteTransaction();
                ret = true;
            }
            catch (Exception ex)
            {
                db.AbortTransaction();
                throw ex;
            }
            return ret;
        }

        /// <summary>
        /// 根据用户名修改用户头像
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="iconName"></param>
        /// <returns></returns>
        public virtual bool SaveUserIconByName(string userName, string iconName) => DbManager.Db.Update<User>("set Icon = @1 where UserName = @0", userName, iconName) == 1;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="displayName"></param>
        /// <returns></returns>
        public virtual bool SaveDisplayName(string userName, string displayName) => DbManager.Db.Update<User>("set DisplayName = @1 where UserName = @0", userName, displayName) == 1;

        /// <summary>
        /// 根据用户名更改用户皮肤
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="cssName"></param>
        /// <returns></returns>
        public virtual bool SaveUserCssByName(string userName, string cssName) => DbManager.Db.Update<User>("set Css = @1 where UserName = @0", userName, cssName) == 1;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="userName"></param>
        /// <returns></returns>
        public virtual BootstrapUser RetrieveUserByUserName(string userName) => DbHelper.RetrieveUserByUserName(userName);

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            return string.Format("{0} ({1})", UserName, DisplayName);
        }
    }

    /// <summary>
    /// 
    /// </summary>
    public enum UserStates
    {
        /// <summary>
        /// 
        /// </summary>
        ChangePassword,
        /// <summary>
        /// 
        /// </summary>
        ChangeTheme,
        /// <summary>
        /// 
        /// </summary>
        ChangeDisplayName,
        /// <summary>
        /// 
        /// </summary>
        ApproveUser,
        /// <summary>
        /// 
        /// </summary>
        RejectUser
    }
}