package authlogic

import (
	"context"
	"crypto/sha256"
	"encoding/hex"
	"errors"
	jwtx "tianyuan-api/pkg/jwt"

	"tianyuan-api/apps/user/internal/svc"
	"tianyuan-api/apps/user/user"

	"github.com/zeromicro/go-zero/core/logx"
)

type LoginUserLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewLoginUserLogic(ctx context.Context, svcCtx *svc.ServiceContext) *LoginUserLogic {
	return &LoginUserLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// 登录接口
func (l *LoginUserLogic) LoginUser(in *user.LoginReq) (*user.LoginResp, error) {
	if in.Username == "" || in.Password == "" {
		return nil, errors.New("用户名或密码不能为空")
	}
	// 使用 FindOneByUsername 查找用户
	users, err := l.svcCtx.UserModel.FindOneByUsername(l.ctx, in.Username)
	if err != nil {
		return nil, errors.New("用户未注册")
	}

	// 验证密码
	if hashPassword(in.Password) != users.Password {
		return nil, errors.New("密码错误")
	}

	// 生成 JWT token，调用封装好的函数
	token, err := jwtx.GenerateJwtToken(users.Id, l.svcCtx.Config.AuthJWT.AccessSecret, l.svcCtx.Config.AuthJWT.AccessExpire)
	if err != nil {
		return nil, err
	}

	return &user.LoginResp{
		Token: token,
	}, nil
}
func hashPassword(password string) string {
	h := sha256.New()
	h.Write([]byte(password))
	return hex.EncodeToString(h.Sum(nil))
}