package main

import (
	"fmt"
	"log"
	"net/http"
	"net/http/httputil"
	"strings"
)

const DOMAIN = "git.landgrafhomyak.ru"

var ORGS_LIST = []string{"Multitasking", "LanguageUtilities", "xomrk"}

func searcher(w http.ResponseWriter, r *http.Request) {
	for _, org := range ORGS_LIST {
		actualUrl := fmt.Sprintf(
			"https://%s/api/packages/%s/maven/%s",
			DOMAIN, org, strings.TrimLeft(r.URL.Path, "/"),
		)
		resp, err := http.Head(actualUrl)
		if err != nil {
			w.WriteHeader(500)
			_, err := fmt.Fprintf(w, "%v", err)
			if err != nil {
				log.Fatal(err)
			}
			return
		}
		switch resp.StatusCode {
		case 200:
			w.Header().Set("Location", actualUrl)
			w.WriteHeader(307)
			return
		case 404:
			fallthrough
		case 403:
			continue
		case 502:
			fallthrough
		case 503:
			w.WriteHeader(503)
			return
		default:
			w.WriteHeader(500)
			rawResp, err := httputil.DumpResponse(resp, true)
			if err != nil {
				log.Fatal(err)
				return
			}
			_, err = w.Write(rawResp)
			if err != nil {
				log.Fatal(err)
				return
			}
			return
		}
	}
	w.WriteHeader(404)
}

func main() {
	http.HandleFunc("/", searcher)
	log.Fatal(http.ListenAndServe("localhost:49186", nil))
}