package session

import (
	"encoding/gob"
	"net/http"
	"time"

	"github.com/mhsanaei/3x-ui/v3/database/model"
	"github.com/mhsanaei/3x-ui/v3/logger"

	"github.com/gin-contrib/sessions"
	"github.com/gin-gonic/gin"
)

const (
	loginUserKey      = "LOGIN_USER"
	apiAuthUserKey    = "api_auth_user"
	sessionCookieName = "3x-ui"
)

func init() {
	gob.Register(model.User{})
}

func SetLoginUser(c *gin.Context, user *model.User) error {
	if user == nil {
		return nil
	}
	s := sessions.Default(c)
	s.Set(loginUserKey, *user)
	return s.Save()
}

func SetAPIAuthUser(c *gin.Context, user *model.User) {
	if user == nil {
		return
	}
	c.Set(apiAuthUserKey, user)
}

func GetLoginUser(c *gin.Context) *model.User {
	if v, ok := c.Get(apiAuthUserKey); ok {
		if u, ok2 := v.(*model.User); ok2 {
			return u
		}
	}
	s := sessions.Default(c)
	obj := s.Get(loginUserKey)
	if obj == nil {
		return nil
	}
	user, ok := obj.(model.User)
	if !ok {
		s.Delete(loginUserKey)
		if err := s.Save(); err != nil {
			logger.Warning("session: failed to drop stale user payload:", err)
		}
		return nil
	}
	return &user
}

func IsLogin(c *gin.Context) bool {
	return GetLoginUser(c) != nil
}

func ClearSession(c *gin.Context) error {
	s := sessions.Default(c)
	s.Clear()
	cookiePath := c.GetString("base_path")
	if cookiePath == "" {
		cookiePath = "/"
	}
	secure := c.Request.TLS != nil
	s.Options(sessions.Options{
		Path:     cookiePath,
		MaxAge:   -1,
		HttpOnly: true,
		Secure:   secure,
		SameSite: http.SameSiteLaxMode,
	})
	if err := s.Save(); err != nil {
		return err
	}
	if cookiePath != "/" {
		http.SetCookie(c.Writer, &http.Cookie{
			Name:     sessionCookieName,
			Value:    "",
			Path:     "/",
			MaxAge:   -1,
			Expires:  time.Unix(0, 0),
			HttpOnly: true,
			Secure:   secure,
			SameSite: http.SameSiteLaxMode,
		})
	}
	return nil
}