package templer

import (
	"context"
	"log/slog"
	"net/http"
	"strings"
)

type ctxKey int

const (
	pathKey ctxKey = iota
)

func Middleware(next http.Handler) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := r.Context()

		ctx = context.WithValue(ctx, pathKey, r.URL.Path)

		next.ServeHTTP(w, r.WithContext(ctx))
	}
}

// Path returns the current path without a leading slash
func Path(ctx context.Context) string {
	path, ok := ctx.Value(pathKey).(string)
	if !ok {
		slog.Error("could not extract request path from context")
		return ""
	}
	return strings.TrimPrefix(path, "/")
}