// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

// geth is a command-line client for Ethereum.
package main

import (
	"fmt"
	"os"
	"slices"
	"sort"
	"strconv"
	"strings"
	"time"

	"github.com/ethereum/go-ethereum/params"

	"github.com/ethereum/go-ethereum/accounts"
	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/ethereum/go-ethereum/cmd/utils"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/console/prompt"
	"github.com/ethereum/go-ethereum/eth"
	"github.com/ethereum/go-ethereum/eth/downloader"
	"github.com/ethereum/go-ethereum/ethclient"
	"github.com/ethereum/go-ethereum/internal/debug"
	"github.com/ethereum/go-ethereum/internal/ethapi"
	"github.com/ethereum/go-ethereum/internal/flags"
	"github.com/ethereum/go-ethereum/log"
	"github.com/ethereum/go-ethereum/node"
	"go.uber.org/automaxprocs/maxprocs"

	// Force-load the tracer engines to trigger registration
	_ "github.com/ethereum/go-ethereum/eth/tracers/js"
	_ "github.com/ethereum/go-ethereum/eth/tracers/live"
	_ "github.com/ethereum/go-ethereum/eth/tracers/native"

	"github.com/urfave/cli/v2"
)

const (
	clientIdentifier = "geth" // Client identifier to advertise over the network
)

var (
	// flags that configure the node
	nodeFlags = slices.Concat([]cli.Flag{
		utils.IdentityFlag,
		utils.UnlockedAccountFlag,
		utils.PasswordFileFlag,
		utils.BootnodesFlag,
		utils.MinFreeDiskSpaceFlag,
		utils.KeyStoreDirFlag,
		utils.ExternalSignerFlag,
		utils.NoUSBFlag, // deprecated
		utils.DirectBroadcastFlag,
		utils.DisableSnapProtocolFlag,
		utils.RangeLimitFlag,
		utils.USBFlag,
		utils.SmartCardDaemonPathFlag,
		utils.RialtoHash,
		utils.OverridePassedForkTime,
		utils.OverrideLorentz,
		utils.OverrideMaxwell,
		utils.OverrideFermi,
		utils.OverrideVerkle,
		utils.OverrideFullImmutabilityThreshold,
		utils.OverrideMinBlocksForBlobRequests,
		utils.OverrideDefaultExtraReserveForBlobRequests,
		utils.OverrideBreatheBlockInterval,
		utils.OverrideFixedTurnLength,
		utils.EnablePersonal, // deprecated
		utils.TxPoolLocalsFlag,
		utils.TxPoolNoLocalsFlag,
		utils.TxPoolJournalFlag,
		utils.TxPoolRejournalFlag,
		utils.TxPoolPriceLimitFlag,
		utils.TxPoolPriceBumpFlag,
		utils.TxPoolAccountSlotsFlag,
		utils.TxPoolGlobalSlotsFlag,
		utils.TxPoolAccountQueueFlag,
		utils.TxPoolGlobalQueueFlag,
		utils.TxPoolOverflowPoolSlotsFlag,
		utils.TxPoolLifetimeFlag,
		utils.TxPoolReannounceTimeFlag,
		utils.BlobPoolDataDirFlag,
		utils.BlobPoolDataCapFlag,
		utils.BlobPoolPriceBumpFlag,
		utils.SyncModeFlag,
		utils.TriesVerifyModeFlag,
		// utils.SyncTargetFlag,
		utils.ExitWhenSyncedFlag,
		utils.GCModeFlag,
		utils.SnapshotFlag,
		utils.TxLookupLimitFlag, // deprecated
		utils.TransactionHistoryFlag,
		utils.BlockHistoryFlag,
		// utils.ChainHistoryFlag, // disabled in bsc
		utils.LogHistoryFlag,
		utils.LogNoHistoryFlag,
		utils.LogExportCheckpointsFlag,
		utils.StateHistoryFlag,
		utils.PathDBSyncFlag,
		utils.JournalFileFlag,
		utils.LightKDFFlag,
		utils.EthRequiredBlocksFlag,
		utils.LegacyWhitelistFlag, // deprecated
		utils.TriesInMemoryFlag,
		utils.CacheFlag,
		utils.CacheDatabaseFlag,
		utils.CacheTrieFlag,
		utils.CacheTrieJournalFlag,   // deprecated
		utils.CacheTrieRejournalFlag, // deprecated
		utils.CacheGCFlag,
		utils.CacheSnapshotFlag,
		// utils.CacheNoPrefetchFlag,
		utils.CachePreimagesFlag,
		utils.MultiDataBaseFlag,
		utils.PruneAncientDataFlag, // deprecated
		utils.CacheLogSizeFlag,
		utils.FDLimitFlag,
		utils.CryptoKZGFlag,
		utils.ListenPortFlag,
		utils.DiscoveryPortFlag,
		utils.MaxPeersFlag,
		utils.MaxPeersPerIPFlag,
		utils.MaxPendingPeersFlag,
		utils.MiningEnabledFlag,
		utils.MinerGasLimitFlag,
		utils.MinerGasPriceFlag,
		utils.MinerEtherbaseFlag,
		utils.MinerExtraDataFlag,
		utils.MinerRecommitIntervalFlag,
		utils.MinerNewPayloadTimeoutFlag, // deprecated
		utils.MinerDelayLeftoverFlag,
		// utils.MinerNewPayloadTimeout,
		utils.NATFlag,
		utils.NoDiscoverFlag,
		utils.PeerFilterPatternsFlag,
		utils.DiscoveryV4Flag,
		utils.DiscoveryV5Flag,
		utils.InstanceFlag,
		utils.LegacyDiscoveryV5Flag, // deprecated
		utils.NetrestrictFlag,
		utils.NodeKeyFileFlag,
		utils.NodeKeyHexFlag,
		utils.DNSDiscoveryFlag,
		// utils.DeveloperFlag,
		// utils.DeveloperGasLimitFlag,
		// utils.DeveloperPeriodFlag,
		utils.VMEnableDebugFlag,
		utils.VMTraceFlag,
		utils.VMTraceJsonConfigFlag,
		utils.NetworkIdFlag,
		utils.EthStatsURLFlag,
		utils.GpoBlocksFlag,
		utils.GpoPercentileFlag,
		utils.GpoMaxGasPriceFlag,
		utils.GpoIgnoreGasPriceFlag,
		configFileFlag,
		utils.CheckSnapshotWithMPT,
		utils.EnableDoubleSignMonitorFlag,
		utils.VotingEnabledFlag,
		utils.DisableVoteAttestationFlag,
		utils.EnableMaliciousVoteMonitorFlag,
		utils.BLSPasswordFileFlag,
		utils.BLSWalletDirFlag,
		utils.VoteJournalDirFlag,
		utils.LogDebugFlag,
		utils.LogBacktraceAtFlag,
		utils.BlobExtraReserveFlag,
		// utils.BeaconApiFlag,
		// utils.BeaconApiHeaderFlag,
		// utils.BeaconThresholdFlag,
		// utils.BeaconNoFilterFlag,
		// utils.BeaconConfigFlag,
		// utils.BeaconGenesisRootFlag,
		// utils.BeaconGenesisTimeFlag,
		// utils.BeaconCheckpointFlag,
	}, utils.NetworkFlags, utils.DatabaseFlags)

	rpcFlags = []cli.Flag{
		utils.HTTPEnabledFlag,
		utils.HTTPListenAddrFlag,
		utils.HTTPPortFlag,
		utils.HTTPCORSDomainFlag,
		// utils.AuthListenFlag,
		// utils.AuthPortFlag,
		// utils.AuthVirtualHostsFlag,
		// utils.JWTSecretFlag,
		utils.HTTPVirtualHostsFlag,
		utils.GraphQLEnabledFlag,
		utils.GraphQLCORSDomainFlag,
		utils.GraphQLVirtualHostsFlag,
		utils.HTTPApiFlag,
		utils.HTTPPathPrefixFlag,
		utils.WSEnabledFlag,
		utils.WSListenAddrFlag,
		utils.WSPortFlag,
		utils.WSApiFlag,
		utils.WSAllowedOriginsFlag,
		utils.WSPathPrefixFlag,
		utils.IPCDisabledFlag,
		utils.IPCPathFlag,
		utils.InsecureUnlockAllowedFlag,
		utils.RPCGlobalGasCapFlag,
		utils.RPCGlobalEVMTimeoutFlag,
		utils.RPCGlobalTxFeeCapFlag,
		utils.AllowUnprotectedTxs,
		utils.BatchRequestLimit,
		utils.BatchResponseMaxSize,
	}

	metricsFlags = []cli.Flag{
		utils.MetricsEnabledFlag,
		utils.MetricsEnabledExpensiveFlag,
		utils.MetricsHTTPFlag,
		utils.MetricsPortFlag,
		utils.MetricsEnableInfluxDBFlag,
		utils.MetricsInfluxDBEndpointFlag,
		utils.MetricsInfluxDBDatabaseFlag,
		utils.MetricsInfluxDBUsernameFlag,
		utils.MetricsInfluxDBPasswordFlag,
		utils.MetricsInfluxDBTagsFlag,
		utils.MetricsEnableInfluxDBV2Flag,
		utils.MetricsInfluxDBTokenFlag,
		utils.MetricsInfluxDBBucketFlag,
		utils.MetricsInfluxDBOrganizationFlag,
	}

	fakeBeaconFlags = []cli.Flag{
		utils.FakeBeaconEnabledFlag,
		utils.FakeBeaconAddrFlag,
		utils.FakeBeaconPortFlag,
	}
)

var app = flags.NewApp("the go-ethereum command line interface")

func init() {
	// Initialize the CLI app and start Geth
	app.Action = geth
	app.Commands = []*cli.Command{
		// See chaincmd.go:
		initCommand,
		initNetworkCommand,
		importCommand,
		exportCommand,
		importHistoryCommand,
		exportHistoryCommand,
		importPreimagesCommand,
		removedbCommand,
		dumpCommand,
		dumpGenesisCommand,
		dumpRootHashCommand,
		// pruneHistoryCommand, // disabled in bsc
		downloadEraCommand,
		// See accountcmd.go:
		accountCommand,
		walletCommand,
		// See consolecmd.go:
		consoleCommand,
		attachCommand,
		javascriptCommand,
		// See misccmd.go:
		versionCommand,
		versionCheckCommand,
		licenseCommand,
		// See config.go
		dumpConfigCommand,
		// see dbcmd.go
		dbCommand,
		// See cmd/utils/flags_legacy.go
		utils.ShowDeprecated,
		// See snapshot.go
		snapshotCommand,
		blsCommand,
		// See verkle.go
		verkleCommand,
	}
	if logTestCommand != nil {
		app.Commands = append(app.Commands, logTestCommand)
	}
	sort.Sort(cli.CommandsByName(app.Commands))

	app.Flags = slices.Concat(
		nodeFlags,
		rpcFlags,
		consoleFlags,
		debug.Flags,
		metricsFlags,
		fakeBeaconFlags,
	)
	flags.AutoEnvVars(app.Flags, "GETH")

	app.Before = func(ctx *cli.Context) error {
		maxprocs.Set() // Automatically set GOMAXPROCS to match Linux container CPU quota.
		flags.MigrateGlobalFlags(ctx)
		if err := debug.Setup(ctx); err != nil {
			return err
		}
		flags.CheckEnvVars(ctx, app.Flags, "GETH")
		return nil
	}
	app.After = func(ctx *cli.Context) error {
		debug.Exit()
		prompt.Stdin.Close() // Resets terminal mode.
		return nil
	}
}

func main() {
	if err := app.Run(os.Args); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}

// prepare manipulates memory cache allowance and setups metric system.
// This function should be called before launching devp2p stack.
func prepare(ctx *cli.Context) {
	// If we're running a known preset, log it for convenience.
	switch {
	case ctx.IsSet(utils.ChapelFlag.Name):
		log.Info("Starting BSC on Chapel testnet...")
	}
	// If we're a full node on mainnet without --cache specified, bump default cache allowance
	if !ctx.IsSet(utils.CacheFlag.Name) && !ctx.IsSet(utils.NetworkIdFlag.Name) {
		// Make sure we're not on any supported preconfigured testnet either
		if !ctx.IsSet(utils.ChapelFlag.Name) &&
			!ctx.IsSet(utils.DeveloperFlag.Name) {
			// Nope, we're really on mainnet. Bump that cache up!
			log.Info("Bumping default cache on mainnet", "provided", ctx.Int(utils.CacheFlag.Name), "updated", 4096)
			ctx.Set(utils.CacheFlag.Name, strconv.Itoa(4096))
		}
	}
}

// geth is the main entry point into the system if no special subcommand is run.
// It creates a default node based on the command line arguments and runs it in
// blocking mode, waiting for it to be shut down.
func geth(ctx *cli.Context) error {
	if args := ctx.Args().Slice(); len(args) > 0 {
		return fmt.Errorf("invalid command: %q", args[0])
	}

	prepare(ctx)
	stack, backend := makeFullNode(ctx)
	defer stack.Close()

	startNode(ctx, stack, backend, false)
	stack.Wait()
	return nil
}

// startNode boots up the system node and all registered protocols, after which
// it unlocks any requested accounts, and starts the RPC/IPC interfaces and the
// miner.
func startNode(ctx *cli.Context, stack *node.Node, backend ethapi.Backend, isConsole bool) {
	// Start up the node itself
	utils.StartNode(ctx, stack, isConsole)

	// Unlock any account specifically requested
	unlockAccounts(ctx, stack)

	// Register wallet event handlers to open and auto-derive wallets
	events := make(chan accounts.WalletEvent, 16)
	stack.AccountManager().Subscribe(events)

	// Create a client to interact with local geth node.
	rpcClient := stack.Attach()
	ethClient := ethclient.NewClient(rpcClient)

	go func() {
		// Open any wallets already attached
		for _, wallet := range stack.AccountManager().Wallets() {
			if err := wallet.Open(""); err != nil {
				log.Warn("Failed to open wallet", "url", wallet.URL(), "err", err)
			}
		}
		// Listen for wallet event till termination
		for event := range events {
			switch event.Kind {
			case accounts.WalletArrived:
				if err := event.Wallet.Open(""); err != nil {
					log.Warn("New wallet appeared, failed to open", "url", event.Wallet.URL(), "err", err)
				}
			case accounts.WalletOpened:
				status, _ := event.Wallet.Status()
				log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", status)

				var derivationPaths []accounts.DerivationPath
				if event.Wallet.URL().Scheme == "ledger" {
					derivationPaths = append(derivationPaths, accounts.LegacyLedgerBaseDerivationPath)
				}
				derivationPaths = append(derivationPaths, accounts.DefaultBaseDerivationPath)

				event.Wallet.SelfDerive(derivationPaths, ethClient)

			case accounts.WalletDropped:
				log.Info("Old wallet dropped", "url", event.Wallet.URL())
				event.Wallet.Close()
			}
		}
	}()

	// Spawn a standalone goroutine for status synchronization monitoring,
	// close the node when synchronization is complete if user required.
	if ctx.Bool(utils.ExitWhenSyncedFlag.Name) {
		go func() {
			sub := stack.EventMux().Subscribe(downloader.DoneEvent{})
			defer sub.Unsubscribe()
			for {
				event := <-sub.Chan()
				if event == nil {
					continue
				}
				done, ok := event.Data.(downloader.DoneEvent)
				if !ok {
					continue
				}
				if timestamp := time.Unix(int64(done.Latest.Time), 0); time.Since(timestamp) < 10*time.Minute {
					log.Info("Synchronisation completed", "latestnum", done.Latest.Number, "latesthash", done.Latest.Hash(),
						"age", common.PrettyAge(timestamp))
					stack.Close()
				}
			}
		}()
	}

	// Start auxiliary services if enabled
	ethBackend, ok := backend.(*eth.EthAPIBackend)
	gasCeil := ethBackend.Miner().GasCeil()
	if gasCeil > params.SystemTxsGasSoftLimit {
		ethBackend.TxPool().SetMaxGas(gasCeil - params.SystemTxsGasSoftLimit)
	}
	if ctx.Bool(utils.MiningEnabledFlag.Name) {
		// Mining only makes sense if a full Ethereum node is running
		if ctx.String(utils.SyncModeFlag.Name) == "light" {
			utils.Fatalf("Light clients do not support mining")
		}

		if !ok {
			utils.Fatalf("Ethereum service not running")
		}
		// Set the gas price to the limits from the CLI and start mining
		gasprice := flags.GlobalBig(ctx, utils.MinerGasPriceFlag.Name)
		ethBackend.TxPool().SetGasTip(gasprice)
		if err := ethBackend.StartMining(); err != nil {
			utils.Fatalf("Failed to start mining: %v", err)
		}
	}
}

// unlockAccounts unlocks any account specifically requested.
func unlockAccounts(ctx *cli.Context, stack *node.Node) {
	var unlocks []string
	inputs := strings.Split(ctx.String(utils.UnlockedAccountFlag.Name), ",")
	for _, input := range inputs {
		if trimmed := strings.TrimSpace(input); trimmed != "" {
			unlocks = append(unlocks, trimmed)
		}
	}
	// Short circuit if there is no account to unlock.
	if len(unlocks) == 0 {
		return
	}
	// If insecure account unlocking is not allowed if node's APIs are exposed to external.
	// Print warning log to user and skip unlocking.
	if !stack.Config().InsecureUnlockAllowed && stack.Config().ExtRPCEnabled() {
		utils.Fatalf("Account unlock with HTTP access is forbidden!")
	}
	backends := stack.AccountManager().Backends(keystore.KeyStoreType)
	if len(backends) == 0 {
		log.Warn("Failed to unlock accounts, keystore is not available")
		return
	}
	ks := backends[0].(*keystore.KeyStore)
	passwords := utils.MakePasswordList(ctx)
	for i, account := range unlocks {
		unlockAccount(ks, account, i, passwords)
	}
}
