using DispenserCommon.DB;
using DispenserCommon.Interface;
using DispenserCommon.Ioc;
using DispenserCommon.Utils;
using DispenserCore.Model.Entity;
using DispenserUI.Exceptions;
using Masuit.Tools;

namespace DispenserCore.Service;

[Component]
public class UserService : Instant
{
    private const string DefaultPassword = "88888888";
    private readonly SqliteHelper _db = ServiceLocator.GetService<SqliteHelper>();

    /// <summary>
    ///     添加用户
    /// </summary>
    /// <param name="user">待添加的用户</param>
    public User AddUser(User user)
    {
        var userName = user.UserName;
        // 校验用户名是否已经存在
        if (_db.Query<User>("select * from users where user_name = ?", userName).Any())
            throw new BizException($"用户名{userName}已存在");

        // 这里用到了一个很神奇的工具库  masuit.tools ,这个家伙有点像java 的 hutool
        if (user.Password.IsNullOrEmpty()) user.Password = DefaultPassword;

        // 对密码进行加密
        user.Password = EncryptPassword(user.Password);

        // 进行插入，返回插入后的用户对象
        _db.Insert(user);

        // 返回插入后的用户对象前，将密码清空
        user.Password = "";

        return user;
    }

    /// <summary>
    ///     对密码进行加密
    /// </summary>
    /// <param name="password">明文</param>
    /// <returns>加密后的密码</returns>
    private static string EncryptPassword(string password)
    {
        return Md5Util.Md5(password + "_mass-transfer");
    }


    /// <summary>
    ///     根据账号来获取用户信息
    /// </summary>
    /// <param name="userName">用户账号</param>
    /// <returns></returns>
    public User? GetUserByUserName(string userName)
    {
        return _db.Query<User>("select * from users where user_name = ?", userName).FirstOrDefault();
    }

    /// <summary>
    ///     获取所有的用户列表
    /// </summary>
    /// <returns></returns>
    public List<User> GetAllUsers()
    {
        return _db.ListAll<User>();
    }

    /// <summary>
    ///     更新用户信息
    /// </summary>
    /// <param name="user"></param>
    public void UpdateUser(User user)
    {
        _db.Update(user);
    }

    /// <summary>
    ///     删除用户
    /// </summary>
    /// <param name="id"></param>
    public void DeleteUser(string id)
    {
        _db.DeleteById<User>(id);
    }


    /// <summary>
    ///     用户登录校验
    /// </summary>
    /// <param name="userName">用户账号</param>
    /// <param name="password">用户密码</param>
    /// <returns>用户信息</returns>
    /// <exception cref="BizException">登录异常信息</exception>
    public User Login(string userName, string password)
    {
        var user = GetUserByUserName(userName);
        if (user == null) throw new BizException("用户名或密码有误");

        if (user.Password != EncryptPassword(password)) throw new BizException("用户名或密码有误");

        // 返回插入后的用户对象前，将密码清空
        user.Password = "";

        return user;
    }

    /// <summary>
    ///     根据用户id来获取用户信息
    /// </summary>
    /// <param name="userId">用户id</param>
    public User GetUserById(string userId)
    {
        return _db.GetById<User>(userId);
    }

    /// <summary>
    ///     进行重置密码
    /// </summary>
    /// <param name="userId"></param>
    public void ResetPassword(string userId)
    {
        var user = GetUserById(userId);
        user.Password = EncryptPassword(DefaultPassword);
        UpdateUser(user);
    }
}