// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package http_test

import (
	"bytes"
	"io/ioutil"
	"net/http"
	"sync"
	"testing"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/swarm/storage"
	"github.com/ethereum/go-ethereum/swarm/testutil"
)

func TestBzzrGetPath(t *testing.T) {

	var err error

	testmanifest := []string{
		`{"entries":[{"path":"a/","hash":"674af7073604ebfc0282a4ab21e5ef1a3c22913866879ebc0816f8a89896b2ed","contentType":"application/bzz-manifest+json","status":0}]}`,
		`{"entries":[{"path":"a","hash":"011b4d03dd8c01f1049143cf9c4c817e4b167f1d1b83e5c6f0f10d89ba1e7bce","contentType":"","status":0},{"path":"b/","hash":"0a87b1c3e4bf013686cdf107ec58590f2004610ee58cc2240f26939f691215f5","contentType":"application/bzz-manifest+json","status":0}]}`,
		`{"entries":[{"path":"b","hash":"011b4d03dd8c01f1049143cf9c4c817e4b167f1d1b83e5c6f0f10d89ba1e7bce","contentType":"","status":0},{"path":"c","hash":"011b4d03dd8c01f1049143cf9c4c817e4b167f1d1b83e5c6f0f10d89ba1e7bce","contentType":"","status":0}]}`,
	}

	testrequests := make(map[string]int)
	testrequests["/"] = 0
	testrequests["/a/"] = 1
	testrequests["/a/b/"] = 2
	testrequests["/x"] = 0
	testrequests[""] = 0

	expectedfailrequests := []string{"", "/x"}

	reader := [3]*bytes.Reader{}

	key := [3]storage.Key{}

	srv := testutil.NewTestSwarmServer(t)
	defer srv.Close()

	wg := &sync.WaitGroup{}

	for i, mf := range testmanifest {
		reader[i] = bytes.NewReader([]byte(mf))
		key[i], err = srv.Dpa.Store(reader[i], int64(len(mf)), wg, nil)
		if err != nil {
			t.Fatal(err)
		}
		wg.Wait()
	}

	_, err = http.Get(srv.URL + "/bzzr:/" + common.ToHex(key[0])[2:] + "/a")
	if err != nil {
		t.Fatalf("Failed to connect to proxy: %v", err)
	}

	for k, v := range testrequests {
		var resp *http.Response
		var respbody []byte

		url := srv.URL + "/bzzr:/"
		if k[:] != "" {
			url += common.ToHex(key[0])[2:] + "/" + k[1:] + "?content_type=text/plain"
		}
		resp, err = http.Get(url)
		if err != nil {
			t.Fatalf("Request failed: %v", err)
		}
		defer resp.Body.Close()
		respbody, err = ioutil.ReadAll(resp.Body)

		if string(respbody) != testmanifest[v] {
			isexpectedfailrequest := false

			for _, r := range expectedfailrequests {
				if k[:] == r {
					isexpectedfailrequest = true
				}
			}
			if isexpectedfailrequest == false {
				t.Fatalf("Response body does not match, expected: %v, got %v", testmanifest[v], string(respbody))
			}
		}
	}

	nonhashtests := []string{
		srv.URL + "/bzz:/name",
		srv.URL + "/bzzi:/nonhash",
		srv.URL + "/bzzr:/nonhash",
	}

	nonhashresponses := []string{
		"error resolving name: 'name' does not resolve: no DNS to resolve name but is not a content hash\n",
		"error resolving nonhash: 'nonhash' is not a content hash\n",
		"error resolving nonhash: 'nonhash' does not resolve: no DNS to resolve name but is not a content hash\n",
	}

	for i, url := range nonhashtests {
		var resp *http.Response
		var respbody []byte

		resp, err = http.Get(url)

		if err != nil {
			t.Fatalf("Request failed: %v", err)
		}
		defer resp.Body.Close()
		respbody, err = ioutil.ReadAll(resp.Body)
		if string(respbody) != nonhashresponses[i] {
			t.Fatalf("Non-Hash response body does not match, expected: %v, got: %v", nonhashresponses[i], string(respbody))
		}
	}

}