// Copyright 2016 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 api

import (
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/crypto"
)

var (
	hexprvkey     = "65138b2aa745041b372153550584587da326ab440576b2a1191dd95cee30039c"
	defaultConfig = `{
    "ChunkDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "chunks") + `",
    "DbCapacity": 5000000,
    "CacheCapacity": 5000,
    "Radius": 0,
    "Branches": 128,
    "Hash": "SHA3",
    "PeersBroadcastSetSize": 1,
    "MaxPeersPerRequest": 5,
    "CallInterval": 3000000000,
    "Swap": {
        "BuyAt": 20000000000,
        "SellAt": 20000000000,
        "PayAt": 100,
        "DropAt": 10000,
        "AutoCashInterval": 300000000000,
        "AutoCashThreshold": 50000000000000,
        "AutoDepositInterval": 300000000000,
        "AutoDepositThreshold": 50000000000000,
        "AutoDepositBuffer": 100000000000000,
        "PublicKey": "0x045f5cfd26692e48d0017d380349bcf50982488bc11b5145f3ddf88b24924299048450542d43527fbe29a5cb32f38d62755393ac002e6bfdd71b8d7ba725ecd7a3",
        "Contract": "0x0000000000000000000000000000000000000000",
        "Beneficiary": "0x0d2f62485607cf38d9d795d93682a517661e513e"
    },
    "Path": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e") + `",
    "Port": "8500",
    "PublicKey": "0x045f5cfd26692e48d0017d380349bcf50982488bc11b5145f3ddf88b24924299048450542d43527fbe29a5cb32f38d62755393ac002e6bfdd71b8d7ba725ecd7a3",
    "BzzKey": "0xe861964402c0b78e2d44098329b8545726f215afa737d803714a4338552fcb81",
    "EnsRoot": "0xd344889e0be3e9ef6c26b0f60ef66a32e83c1b69"
}`
)

func TestConfigWriteRead(t *testing.T) {
	tmp, err := ioutil.TempDir(os.TempDir(), "bzz-test")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tmp)

	prvkey := crypto.ToECDSA(common.Hex2Bytes(hexprvkey))
	orig, err := NewConfig(tmp, common.Address{}, prvkey)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	account := crypto.PubkeyToAddress(prvkey.PublicKey)
	dirpath := filepath.Join(tmp, common.Bytes2Hex(account.Bytes()))
	confpath := filepath.Join(dirpath, "config.json")
	data, err := ioutil.ReadFile(confpath)
	if err != nil {
		t.Fatalf("default config file cannot be read: %v", err)
	}
	exp := strings.Replace(defaultConfig, "TMPDIR", tmp, -1)
	exp = strings.Replace(exp, "\\", "\\\\", -1)

	if string(data) != exp {
		t.Fatalf("default config mismatch:\nexpected: %v\ngot: %v", exp, string(data))
	}

	conf, err := NewConfig(tmp, common.Address{}, prvkey)
	if err != nil {
		t.Fatalf("expected no error, got %v", err)
	}
	if conf.Swap.Beneficiary.Hex() != orig.Swap.Beneficiary.Hex() {
		t.Fatalf("expected beneficiary from loaded config %v to match original %v", conf.Swap.Beneficiary.Hex(), orig.Swap.Beneficiary.Hex())
	}

}