package main

import (
	"fmt"
	"net/http"
	"net/url"
	"os"
	"time"

	"github.com/minio/minio-go/v6/pkg/s3utils"
	"github.com/minio/minio-go/v6/pkg/signer"
)

var accessKey string
var secretKey string

func main() {
	// Read configuration
	accessKey = os.Getenv("MINIO_ACCESS_KEY")
	secretKey = os.Getenv("MINIO_SECRET_KEY")

	server := &http.Server{
		Addr:         ":8000",
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
	}
	http.HandleFunc("/list", hello)
	http.HandleFunc("/write", hello2)
	err := server.ListenAndServe()
	if err != nil {
		panic(err)
	}
}

func hello(w http.ResponseWriter, req *http.Request) {
	// Based upon https://github.com/minio/minio-go/blob/337bb00bc3c832292b36681c7bde1b56a185c310/api.go#L873
	expires := 60 * time.Second
	reqValues := make(url.Values)
	reqValues.Set("list-type", "2")
	reqValues.Set("metadata", "true")
	reqValues.Set("encoding-type", "url")
	reqValues.Set("prefix", "")
	reqValues.Set("delimiter", "")
	reqValues.Set("max-keys", fmt.Sprintf("%d", 500))
	reqValues.Set("start-after", "")
	// Change path accordingly https://github.com/minio/minio-go/blob/337bb00bc3c832292b36681c7bde1b56a185c310/api.go#L911
	// Request URL MUST not have a port
	reqString := "https://rock.six.six.six.six.six.eurica.eu.org/?" + s3utils.QueryEncode(reqValues)
	req, err := http.NewRequest("GET", reqString, nil)
	if err != nil {
		panic(err)
	}
	signedReq := signer.PreSignV4(*req, accessKey, secretKey, "", "sgp1", int64(expires/time.Second))

	w.Header().Add("Location", signedReq.URL.String())
	w.WriteHeader(http.StatusTemporaryRedirect)
}

func hello2(w http.ResponseWriter, req *http.Request) {
	// Based upon https://github.com/minio/minio-go/blob/337bb00bc3c832292b36681c7bde1b56a185c310/api.go#L873
	expires := 60 * time.Second
	reqValues := make(url.Values)
	// Change path accordingly https://github.com/minio/minio-go/blob/337bb00bc3c832292b36681c7bde1b56a185c310/api.go#L911
	// Request URL MUST not have a port
	reqString := "https://rock.six.six.six.six.six.eurica.eu.org/rock.txt?" + s3utils.QueryEncode(reqValues)
	req, err := http.NewRequest("PUT", reqString, nil)
	if err != nil {
		panic(err)
	}
	signedReq := signer.PreSignV4(*req, accessKey, secretKey, "", "sgp1", int64(expires/time.Second))

	w.Header().Add("Location", signedReq.URL.String())
	w.WriteHeader(http.StatusTemporaryRedirect)
}