package handlers

import (
	"encoding/json"
	"errors"
	"github.com/gofiber/fiber/v2"
	"lmika.dev/lmika/hugo-cms/models"
	"log"
)

func GetUser(c *fiber.Ctx) models.User {
	u, ok := c.Locals("user").(models.User)
	if !ok {
		panic(errors.New("user not found in context"))
	}
	return u
}

func GetSite(c *fiber.Ctx) models.Site {
	s, ok := c.Locals("site").(models.Site)
	if !ok {
		panic(errors.New("no site in context"))
	}
	return s
}

func UpdatePrefCookie(c *fiber.Ctx, update func(prefs *models.PrefCookie)) {
	cookie := GetPrefCookie(c)
	update(&cookie)
	setPrefCookie(c, cookie)
}

func GetPrefCookie(c *fiber.Ctx) models.PrefCookie {
	prefCookieValue := c.Cookies(models.PrefCookieName)
	if prefCookieValue == "" {
		return models.PrefCookie{}
	}

	var prefCookie models.PrefCookie
	err := json.Unmarshal([]byte(prefCookieValue), &prefCookie)
	if err != nil {
		return models.PrefCookie{}
	}

	return prefCookie
}

func setPrefCookie(c *fiber.Ctx, prefCookie models.PrefCookie) {
	if prefJson, err := json.Marshal(prefCookie); err == nil {
		c.Cookie(&fiber.Cookie{
			Name:  models.PrefCookieName,
			Value: string(prefJson),
		})
	} else {
		log.Printf("unable to save pref cookie: %v", err)
	}
}