package svc

import (
	"errors"
	"fmt"
	"fusenapi/server/home-user-auth/internal/config"
	"net/http"

	"github.com/golang-jwt/jwt"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

type ServiceContext struct {
	Config    config.Config
	MysqlConn sqlx.SqlConn
}

func NewServiceContext(c config.Config) *ServiceContext {
	return &ServiceContext{
		Config:    c,
		MysqlConn: sqlx.NewMysql(c.SourceMysql),
	}
}

func (svcCxt *ServiceContext) ParseJwtToken(r *http.Request) (jwt.MapClaims, error) {
	AuthKey := r.Header.Get("Authorization")
	if AuthKey == "" {
		return nil, nil
	}

	token, err := jwt.Parse(AuthKey, func(token *jwt.Token) (interface{}, error) {
		// 检查签名方法是否为 HS256
		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
		}
		// 返回用于验证签名的密钥
		return []byte(svcCxt.Config.Auth.AccessSecret), nil
	})
	if err != nil {
		return nil, errors.New(fmt.Sprint("Error parsing token:", err))
	}

	// 验证成功返回
	if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
		return claims, nil
	}

	return nil, errors.New(fmt.Sprint("Invalid token", err))
}