using Model;
using Model.Entity;
using ORM;
using Service.Implement;
using Service.Interface;

public class UserService: BaseService<UserEntity>, IUserService
{
    public UserService(SqlSugarRepository<UserEntity> repository) : base(repository)
    {
    }

    public async Task<Result<UserEntity>> GetUserByUserNameAsync(string username)
    {
        if (string.IsNullOrWhiteSpace(username))
            return Result<UserEntity>.Error("用户名不能为空");

        try
        {
            var user = await _repository.Entities
                .Where(x => x.UserName == username)
                .FirstAsync();

            if (user == null)
                return Result<UserEntity>.Error("用户不存在");

            return Result<UserEntity>.Success(user);
        }
        catch (Exception ex)
        {
            return Result<UserEntity>.Error("获取用户失败", ex);
        }
    }

    public override async Task<Result<bool>> InsertAsync(UserEntity entity)
    {
        if (entity == null)
            return Result<bool>.Error("用户数据不能为空");

        try
        {
            // 唯一性校验
            bool exists = await _repository.Entities
                .AnyAsync(x => x.UserName == entity.UserName);

            if (exists)
                return Result<bool>.Error("用户名已存在");

            var result = await _repository.InsertAsync(entity);

            return Result<bool>.Success(result);
        }
        catch (Exception ex)
        {
            return Result<bool>.Error("插入数据失败", ex);
        }
    }
    /// <summary>
    /// 更新单条用户记录
    /// </summary>
    /// <param name="entity">要更新的用户实体，Id 必须有值</param>
    public async Task<Result<bool>> UpdateAsync(UserEntity entity)
    {
        if (entity == null)
            return Result<bool>.Error("用户数据不能为空");

        if (entity.Id <= 0)
            return Result<bool>.Error("主键 Id 无效，无法更新");

        try
        {
            // 唯一性校验（可选，如果允许改用户名就检查）
            bool exists = await _repository.Entities
                .Where(x => x.UserName == entity.UserName && x.Id != entity.Id)
                .AnyAsync();

            if (exists)
                return Result<bool>.Error("用户名已存在");

            // 更新整个实体
            var result = await _repository.UpdateAsync(entity);

            return Result<bool>.Success(result);
        }
        catch (Exception ex)
        {
            return Result<bool>.Error("更新用户失败", ex);
        }
    }

}