package node

import (
	"crypto/rand"
	"flag"
	"fmt"
	"io/ioutil"
	"math/big"
	"os"
	"path/filepath"
	"testing"

	"github.com/prysmaticlabs/prysm/shared/params"
	"github.com/prysmaticlabs/prysm/shared/testutil"
	"github.com/prysmaticlabs/prysm/shared/testutil/assert"
	"github.com/prysmaticlabs/prysm/shared/testutil/require"
	"github.com/prysmaticlabs/prysm/validator/accounts"
	"github.com/prysmaticlabs/prysm/validator/accounts/wallet"
	"github.com/prysmaticlabs/prysm/validator/db/kv"
	"github.com/prysmaticlabs/prysm/validator/flags"
	"github.com/prysmaticlabs/prysm/validator/keymanager"
	logTest "github.com/sirupsen/logrus/hooks/test"
	"github.com/urfave/cli/v2"
)

// Test that the sharding node can build with default flag values.
func TestNode_Builds(t *testing.T) {
	app := cli.App{}
	set := flag.NewFlagSet("test", 0)
	set.String("datadir", testutil.TempDir()+"/datadir", "the node data directory")
	set.Bool("allow-new-protection-db", true, "dont prompt")
	dir := testutil.TempDir() + "/walletpath"
	passwordDir := testutil.TempDir() + "/password"
	require.NoError(t, os.MkdirAll(passwordDir, os.ModePerm))
	passwordFile := filepath.Join(passwordDir, "password.txt")
	walletPassword := "$$Passw0rdz2$$"
	require.NoError(t, ioutil.WriteFile(
		passwordFile,
		[]byte(walletPassword),
		os.ModePerm,
	))
	defer func() {
		assert.NoError(t, os.RemoveAll(dir))
		assert.NoError(t, os.RemoveAll(passwordDir))
		assert.NoError(t, os.RemoveAll(testutil.TempDir()+"/datadir"))
	}()
	set.String("wallet-dir", dir, "path to wallet")
	set.String("wallet-password-file", passwordFile, "path to wallet password")
	set.String("keymanager-kind", "imported", "keymanager kind")
	set.String("verbosity", "debug", "log verbosity")
	require.NoError(t, set.Set(flags.WalletPasswordFileFlag.Name, passwordFile))
	context := cli.NewContext(&app, set, nil)
	_, err := accounts.CreateWalletWithKeymanager(context.Context, &accounts.CreateWalletConfig{
		WalletCfg: &wallet.Config{
			WalletDir:      dir,
			KeymanagerKind: keymanager.Imported,
			WalletPassword: walletPassword,
		},
	})
	require.NoError(t, err)

	valClient, err := NewValidatorClient(context)
	require.NoError(t, err, "Failed to create ValidatorClient")
	err = valClient.db.Close()
	require.NoError(t, err)
}

// TestClearDB tests clearing the database
func TestClearDB(t *testing.T) {
	hook := logTest.NewGlobal()
	randPath, err := rand.Int(rand.Reader, big.NewInt(1000000))
	require.NoError(t, err, "Could not generate random number for file path")
	tmp := filepath.Join(testutil.TempDir(), fmt.Sprintf("datadirtest%d", randPath))
	require.NoError(t, os.RemoveAll(tmp))
	err = clearDB(tmp, true)
	require.NoError(t, err)
	require.LogsContain(t, hook, "Removing database")
}

func Test_moveSlashingProtectionDatabase_doesntPromptWithFlag(t *testing.T) {
	hook := logTest.NewGlobal()
	app := cli.App{}
	set := flag.NewFlagSet("test", 0)
	dataDir := testutil.TempDir() + "/datadir"
	set.String("datadir", dataDir, "the node data directory")
	set.Bool("allow-new-protection-db", true, "dont prompt")
	context := cli.NewContext(&app, set, nil)
	// dont prompt when non interactive flag is on.
	moveSlashingProtectionDatabase(context, flags.WalletDirFlag)
	require.LogsDoNotContain(t, hook, "protection db is empty.")
	require.LogsDoNotContain(t, hook, "Moving validator protection db")
}

func Test_moveSlashingProtectionDatabaseDefaultValue(t *testing.T) {
	tmpfile, err := ioutil.TempFile("", "content")
	require.NoError(t, err)
	defer func() {
		err := os.Remove(tmpfile.Name())
		require.NoError(t, err)
	}()

	_, err = tmpfile.Write([]byte("\n"))
	require.NoError(t, err)

	_, err = tmpfile.Seek(0, 0)
	require.NoError(t, err)
	oldStdin := os.Stdin
	defer func() { os.Stdin = oldStdin }() // Restore original Stdin
	os.Stdin = tmpfile

	hook := logTest.NewGlobal()
	app := cli.App{}
	set := flag.NewFlagSet("test", 0)

	// prompt when flag is not present and db is new.
	context := cli.NewContext(&app, set, nil)
	moveSlashingProtectionDatabase(context, flags.WalletDirFlag)
	require.LogsDoNotContain(t, hook, "Moving validator protection db")
}

func Test_moveSlashingProtectionDatabaseToNewLocation(t *testing.T) {
	tmpDBDir, err := ioutil.TempDir("", "dbdir")
	require.NoError(t, err)
	tmpfile, err := ioutil.TempFile("", "content")
	require.NoError(t, err)
	tmpDbFile := filepath.Join(tmpDBDir, kv.ProtectionDbFileName)
	err = ioutil.WriteFile(tmpDbFile, []byte("test data"), params.BeaconIoConfig().ReadWritePermissions)
	require.NoError(t, err)
	defer func() {
		err := os.Remove(tmpfile.Name())
		require.NoError(t, err)
		err = os.Remove(tmpDbFile)
		require.NoError(t, err)
		err = os.Remove(tmpDBDir)
		require.NoError(t, err)
	}()
	_, err = tmpfile.Write([]byte(tmpDBDir))
	require.NoError(t, err)

	_, err = tmpfile.Seek(0, 0)
	require.NoError(t, err)
	oldStdin := os.Stdin
	defer func() { os.Stdin = oldStdin }() // Restore original Stdin
	os.Stdin = tmpfile

	hook := logTest.NewGlobal()
	app := cli.App{}
	set := flag.NewFlagSet("test", 0)
	set.String("datadir", testutil.TempDir(), "the node data directory")

	// prompt when flag is not present and db is new.
	context := cli.NewContext(&app, set, nil)
	moveSlashingProtectionDatabase(context, flags.WalletDirFlag)
	require.LogsContain(t, hook, "Moving validator protection db")
}