package natspec

import (
	"fmt"
	"io/ioutil"
	"math/big"
	"os"
	"testing"

	"github.com/ethereum/go-ethereum/accounts"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/common/docserver"
	"github.com/ethereum/go-ethereum/common/resolver"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/core/state"
	//"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/crypto"
	"github.com/ethereum/go-ethereum/eth"
	xe "github.com/ethereum/go-ethereum/xeth"
)

type testFrontend struct {
	t           *testing.T
	ethereum    *eth.Ethereum
	xeth        *xe.XEth
	stateDb     *state.StateDB
	coinbase    string
	lastConfirm string
}

func (f *testFrontend) UnlockAccount(acc []byte) bool {
	f.t.Logf("Unlocking account %v\n", common.Bytes2Hex(acc))
	f.ethereum.AccountManager().Unlock(acc, "password")
	return true
}

func (f *testFrontend) ConfirmTransaction(message string) bool {
	f.lastConfirm = message
	return true
}

var port = 30300

func testEth(t *testing.T) (ethereum *eth.Ethereum, err error) {
	os.RemoveAll("/tmp/eth/")
	err = os.MkdirAll("/tmp/eth/keys/e273f01c99144c438695e10f24926dc1f9fbf62d/", os.ModePerm)
	if err != nil {
		t.Errorf("%v", err)
		return
	}
	err = os.MkdirAll("/tmp/eth/data", os.ModePerm)
	if err != nil {
		t.Errorf("%v", err)
		return
	}
	ks := crypto.NewKeyStorePlain("/tmp/eth/keys")
	ioutil.WriteFile("/tmp/eth/keys/e273f01c99144c438695e10f24926dc1f9fbf62d/e273f01c99144c438695e10f24926dc1f9fbf62d",
		[]byte(`{"Id":"RhRXD+fNRKS4jx+7ZfEsNA==","Address":"4nPwHJkUTEOGleEPJJJtwfn79i0=","PrivateKey":"h4ACVpe74uIvi5Cg/2tX/Yrm2xdr3J7QoMbMtNX2CNc="}`), os.ModePerm)

	port++
	ethereum, err = eth.New(&eth.Config{
		DataDir:        "/tmp/eth",
		AccountManager: accounts.NewManager(ks),
		Port:           fmt.Sprintf("%d", port),
		MaxPeers:       10,
		Name:           "test",
	})

	if err != nil {
		t.Errorf("%v", err)
		return
	}

	return
}

func testInit(t *testing.T) (self *testFrontend) {

	ethereum, err := testEth(t)
	if err != nil {
		t.Errorf("error creating jsre, got %v", err)
		return
	}
	err = ethereum.Start()
	if err != nil {
		t.Errorf("error starting ethereum: %v", err)
		return
	}

	self = &testFrontend{t: t, ethereum: ethereum}
	self.xeth = xe.New(ethereum, self)

	addr := self.xeth.Coinbase()
	self.coinbase = addr
	if addr != "0x"+core.TestAccount {
		t.Errorf("CoinBase %v does not match TestAccount 0x%v", addr, core.TestAccount)
	}
	t.Logf("CoinBase is %v", addr)

	balance := self.xeth.BalanceAt(core.TestAccount)
	if balance != core.TestBalance {
		t.Errorf("Balance %v does not match TestBalance %v", balance, core.TestBalance)
	}
	t.Logf("Balance is %v", balance)

	self.stateDb = self.ethereum.ChainManager().State().Copy()

	return

}

func (self *testFrontend) insertTx(addr, contract, fnsig string, args []string) {

	hash := common.Bytes2Hex(crypto.Sha3([]byte(fnsig)))
	data := "0x" + hash[0:8]
	for _, arg := range args {
		data = data + common.Bytes2Hex(common.Hex2BytesFixed(arg, 32))
	}
	self.t.Logf("Tx data: %v", data)
	self.xeth.Transact(addr, contract, "100000000000", "100000", "100000", data)

	cb := common.HexToAddress(addr)

	coinbase := self.stateDb.GetStateObject(cb)
	coinbase.SetGasPool(big.NewInt(100000))
	block := self.ethereum.ChainManager().NewBlock(cb)
	txs := self.ethereum.TxPool().GetTransactions()
	tx := txs[0]

	_, gas, err := core.ApplyMessage(core.NewEnv(self.stateDb, self.ethereum.ChainManager(), tx, block), tx, coinbase)

	self.t.Logf("ApplyMessage: gas %v  err %v", gas, err)

	self.ethereum.TxPool().RemoveSet(txs)
	self.xeth = self.xeth.WithState(self.stateDb)

}

func (self *testFrontend) registerURL(hash common.Hash, url string) {
	hashHex := common.Bytes2Hex(hash[:])
	urlHex := common.Bytes2Hex([]byte(url))
	self.insertTx(self.coinbase, core.ContractAddrURLhint, "register(bytes32,bytes32)", []string{hashHex, urlHex})
}

func (self *testFrontend) testResolver() *resolver.Resolver {
	return resolver.New(self.xeth, resolver.URLHintContractAddress, resolver.NameRegContractAddress)
}

func TestNatspecE2E(t *testing.T) {

	tf := testInit(t)
	defer tf.ethereum.Stop()

	ds, _ := docserver.New("/tmp/")

	chash := common.BytesToHash(crypto.Sha3([]byte("kutyafasza")))
	tf.registerURL(chash, "file:///test.content")
	tf.registerURL(chash, "kf")

	url, err2 := tf.testResolver().ContentHashToUrl(chash)

	t.Logf("URL: %v  err: %v", url, err2)

	ds.GetAuthContent(url, chash)

}