package main

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"net/url"
	"os"
	"path/filepath"

	"github.com/google/uuid"
)

func uploadHandler(w http.ResponseWriter, r *http.Request) {
	uid := uuid.New().String()
	section := string(uid[len(uid)-1])
	if err := os.MkdirAll(filepath.Join(path, section), 0777); err != nil {
		log.Println(err)
		http.Error(w, "can't create storage dir", http.StatusInternalServerError)
		return
	}
	fp, err := os.Create(filepath.Join(path, section, uid))
	if err != nil {
		log.Println(err)
		http.Error(w, "can't create storage file", http.StatusInternalServerError)
		return
	}
	defer fp.Close()
	if _, err := io.Copy(fp, r.Body); err != nil {
		log.Println(err)
		http.Error(w, "can't upload storage file", http.StatusInternalServerError)
		return
	}
	h := w.Header()
	h.Set("Content-Type", "text/plain; charset=utf-8")
	h.Set("X-Content-Type-Options", "nosniff")
	w.WriteHeader(http.StatusCreated)
	u, err := url.JoinPath(host, section, uid)
	if err != nil {
		log.Println(err)
		http.Error(w, "can't get file url", http.StatusInternalServerError)
		return
	}
	fmt.Fprintln(w, u)
}