package main

import (
	"flag"
	"log"
	"net/http"
	"path"
	"strings"
)

var (
	flagFetchDirPath string
)

func init() {
	flag.StringVar(&flagFetchDirPath, "d", "data", "Path to content-addressed store")
}

func handleDataNew(storePath string) http.HandlerFunc {
	// hash string to url
	urlMap := mustReadJSON[map[string]string](path.Join(storePath, "map"))

	urlMapInverse := make(map[string]string, len(urlMap))
	for hs, u := range urlMap {
		urlMapInverse[u] = hs
	}
	log.Printf("inverted %d media entries", len(urlMap))

	return func(writer http.ResponseWriter, request *http.Request) {
		if request.URL == nil {
			log.Printf("got invalid request %p", request)
			return
		}

		fixedPath := strings.Replace(request.URL.Path, "/data/https:", "https:/", 1)
		if hs, ok := urlMapInverse[fixedPath]; !ok {
			verboseln("media path", fixedPath, "not found")
			writer.WriteHeader(http.StatusNotFound)
			writeResp(writer, []byte("not found"))
			return
		} else {
			http.ServeFile(writer, request, path.Join(storePath, hs))
		}
	}
}