package utils

import (
	"fmt"
	"log/slog"
	"me-fit/types"
	"net/http"

	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promauto"
)

type ContextKey string

const (
	ContextKeyUser ContextKey = "user_id"
)

var (
	errorMetric = promauto.NewCounter(
		prometheus.CounterOpts{
			Name: "mefit_error_total",
			Help: "The total number of errors during processing",
		},
	)
)

func LogError(message string, err error) {
	slog.Error(message + ": " + err.Error())
	errorMetric.Inc()
}
func LogErrorMsg(message string) {
	slog.Error(message)
	errorMetric.Inc()
}

func TriggerToast(w http.ResponseWriter, r *http.Request, class string, message string) {
	if isHtmx(r) {
		w.Header().Set("HX-Trigger", fmt.Sprintf(`{"toast": "%v|%v"}`, class, message))
	} else {
		LogErrorMsg("Trying to trigger toast in non-HTMX request")
	}
}

func DoRedirect(w http.ResponseWriter, r *http.Request, url string) {
	if isHtmx(r) {
		w.Header().Add("HX-Redirect", url)
	} else {
		http.Redirect(w, r, url, http.StatusSeeOther)
	}
}

func GetUser(r *http.Request) *types.User {
	user := r.Context().Value(ContextKeyUser)
	if user != nil {
		return user.(*types.User)
	} else {
		return nil
	}
}

func GetSessionID(r *http.Request) types.SessionId {
	for _, c := range r.Cookies() {
		if c.Name == "id" {
			return types.SessionId(c.Value)
		}
	}
	return ""
}

func isHtmx(r *http.Request) bool {
	return r.Header.Get("HX-Request") == "true"
}