// Copyright 2022 Evmos Foundation
// This file is part of the Evmos Network packages.
//
// Evmos 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 Evmos packages are 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 Evmos packages. If not, see https://github.com/evmos/evmos/blob/main/LICENSE

package main

import (
	"errors"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"time"

	"github.com/spf13/cast"
	"github.com/spf13/cobra"

	tmcfg "github.com/tendermint/tendermint/config"
	tmcli "github.com/tendermint/tendermint/libs/cli"
	"github.com/tendermint/tendermint/libs/log"
	dbm "github.com/tendermint/tm-db"

	"github.com/cosmos/cosmos-sdk/baseapp"
	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/client/config"
	"github.com/cosmos/cosmos-sdk/client/flags"
	"github.com/cosmos/cosmos-sdk/client/pruning"
	"github.com/cosmos/cosmos-sdk/client/rpc"
	sdkserver "github.com/cosmos/cosmos-sdk/server"
	servertypes "github.com/cosmos/cosmos-sdk/server/types"
	"github.com/cosmos/cosmos-sdk/simapp/params"
	"github.com/cosmos/cosmos-sdk/snapshots"
	snapshottypes "github.com/cosmos/cosmos-sdk/snapshots/types"
	"github.com/cosmos/cosmos-sdk/store"
	sdk "github.com/cosmos/cosmos-sdk/types"
	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
	"github.com/cosmos/cosmos-sdk/x/auth/types"
	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
	"github.com/cosmos/cosmos-sdk/x/crisis"
	genutilcli "github.com/cosmos/cosmos-sdk/x/genutil/client/cli"

	evmosclient "github.com/evmos/evmos/v12/client"
	"github.com/evmos/evmos/v12/client/debug"
	"github.com/evmos/evmos/v12/encoding"
	"github.com/evmos/evmos/v12/ethereum/eip712"
	evmosserver "github.com/evmos/evmos/v12/server"
	servercfg "github.com/evmos/evmos/v12/server/config"
	srvflags "github.com/evmos/evmos/v12/server/flags"

	"github.com/evmos/evmos/v12/app"
	cmdcfg "github.com/evmos/evmos/v12/cmd/config"
	evmoskr "github.com/evmos/evmos/v12/crypto/keyring"
)

const (
	EnvPrefix = "CATENA"
)

// NewRootCmd creates a new root command for catanead. It is called once in the
// main function.
func NewRootCmd() (*cobra.Command, params.EncodingConfig) {
	encodingConfig := encoding.MakeConfig(app.ModuleBasics)
	initClientCtx := client.Context{}.
		WithCodec(encodingConfig.Codec).
		WithInterfaceRegistry(encodingConfig.InterfaceRegistry).
		WithTxConfig(encodingConfig.TxConfig).
		WithLegacyAmino(encodingConfig.Amino).
		WithInput(os.Stdin).
		WithAccountRetriever(types.AccountRetriever{}).
		WithBroadcastMode(flags.BroadcastBlock).
		WithHomeDir(app.DefaultNodeHome).
		WithKeyringOptions(evmoskr.Option()).
		WithViper(EnvPrefix).
		WithLedgerHasProtobuf(true)

	eip712.SetEncodingConfig(encodingConfig)

	rootCmd := &cobra.Command{
		Use:   app.Name,
		Short: "Evmos Daemon",
		PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
			// set the default command outputs
			cmd.SetOut(cmd.OutOrStdout())
			cmd.SetErr(cmd.ErrOrStderr())

			initClientCtx, err := client.ReadPersistentCommandFlags(initClientCtx, cmd.Flags())
			if err != nil {
				return err
			}

			initClientCtx, err = config.ReadFromClientConfig(initClientCtx)
			if err != nil {
				return err
			}

			if err := client.SetCmdClientContextHandler(initClientCtx, cmd); err != nil {
				return err
			}

			// override the app and tendermint configuration
			customAppTemplate, customAppConfig := initAppConfig()
			customTMConfig := initTendermintConfig()

			return sdkserver.InterceptConfigsPreRunHandler(cmd, customAppTemplate, customAppConfig, customTMConfig)
		},
	}

	cfg := sdk.GetConfig()
	cfg.Seal()

	a := appCreator{encodingConfig}
	rootCmd.AddCommand(
		evmosclient.ValidateChainID(
			InitCmd(app.ModuleBasics, app.DefaultNodeHome),
		),
		genutilcli.CollectGenTxsCmd(banktypes.GenesisBalancesIterator{}, app.DefaultNodeHome),
		MigrateGenesisCmd(),
		genutilcli.GenTxCmd(app.ModuleBasics, encodingConfig.TxConfig, banktypes.GenesisBalancesIterator{}, app.DefaultNodeHome),
		genutilcli.ValidateGenesisCmd(app.ModuleBasics),
		AddGenesisAccountCmd(app.DefaultNodeHome),
		tmcli.NewCompletionCmd(rootCmd, true),
		NewTestnetCmd(app.ModuleBasics, banktypes.GenesisBalancesIterator{}),
		debug.Cmd(),
		config.Cmd(),
		pruning.PruningCmd(a.newApp),
	)

	evmosserver.AddCommands(
		rootCmd,
		evmosserver.NewDefaultStartOptions(a.newApp, app.DefaultNodeHome),
		a.appExport,
		addModuleInitFlags,
	)

	// add keybase, auxiliary RPC, query, and tx child commands
	rootCmd.AddCommand(
		rpc.StatusCommand(),
		queryCommand(),
		txCommand(),
		evmosclient.KeyCommands(app.DefaultNodeHome),
	)
	rootCmd, err := srvflags.AddTxFlags(rootCmd)
	if err != nil {
		panic(err)
	}

	// add rosetta
	rootCmd.AddCommand(sdkserver.RosettaCommand(encodingConfig.InterfaceRegistry, encodingConfig.Codec))

	return rootCmd, encodingConfig
}

func addModuleInitFlags(startCmd *cobra.Command) {
	crisis.AddModuleInitFlags(startCmd)
}

func queryCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:                        "query",
		Aliases:                    []string{"q"},
		Short:                      "Querying subcommands",
		DisableFlagParsing:         true,
		SuggestionsMinimumDistance: 2,
		RunE:                       client.ValidateCmd,
	}

	cmd.AddCommand(
		authcmd.GetAccountCmd(),
		rpc.ValidatorCommand(),
		rpc.BlockCommand(),
		authcmd.QueryTxsByEventsCmd(),
		authcmd.QueryTxCmd(),
	)

	app.ModuleBasics.AddQueryCommands(cmd)
	cmd.PersistentFlags().String(flags.FlagChainID, "", "The network chain ID")

	return cmd
}

func txCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:                        "tx",
		Short:                      "Transactions subcommands",
		DisableFlagParsing:         true,
		SuggestionsMinimumDistance: 2,
		RunE:                       client.ValidateCmd,
	}

	cmd.AddCommand(
		authcmd.GetSignCommand(),
		authcmd.GetSignBatchCommand(),
		authcmd.GetMultiSignCommand(),
		authcmd.GetMultiSignBatchCmd(),
		authcmd.GetValidateSignaturesCommand(),
		authcmd.GetBroadcastCommand(),
		authcmd.GetEncodeCommand(),
		authcmd.GetDecodeCommand(),
		authcmd.GetAuxToFeeCommand(),
	)

	app.ModuleBasics.AddTxCommands(cmd)
	cmd.PersistentFlags().String(flags.FlagChainID, "", "The network chain ID")

	return cmd
}

// initAppConfig helps to override default appConfig template and configs.
// return "", nil if no custom configuration is required for the application.
func initAppConfig() (string, interface{}) {
	customAppTemplate, customAppConfig := servercfg.AppConfig(cmdcfg.BaseDenom)

	srvCfg, ok := customAppConfig.(servercfg.Config)
	if !ok {
		panic(fmt.Errorf("unknown app config type %T", customAppConfig))
	}

	srvCfg.StateSync.SnapshotInterval = 5000
	srvCfg.StateSync.SnapshotKeepRecent = 2
	srvCfg.IAVLDisableFastNode = false

	return customAppTemplate, srvCfg
}

type appCreator struct {
	encCfg params.EncodingConfig
}

// newApp is an appCreator
func (a appCreator) newApp(logger log.Logger, db dbm.DB, traceStore io.Writer, appOpts servertypes.AppOptions) servertypes.Application {
	var cache sdk.MultiStorePersistentCache

	if cast.ToBool(appOpts.Get(sdkserver.FlagInterBlockCache)) {
		cache = store.NewCommitKVStoreCacheManager()
	}

	skipUpgradeHeights := make(map[int64]bool)
	for _, h := range cast.ToIntSlice(appOpts.Get(sdkserver.FlagUnsafeSkipUpgrades)) {
		skipUpgradeHeights[int64(h)] = true
	}

	pruningOpts, err := sdkserver.GetPruningOptionsFromFlags(appOpts)
	if err != nil {
		panic(err)
	}

	snapshotDir := filepath.Join(cast.ToString(appOpts.Get(flags.FlagHome)), "data", "snapshots")
	snapshotDB, err := dbm.NewDB("metadata", sdkserver.GetAppDBBackend(appOpts), snapshotDir)
	if err != nil {
		panic(err)
	}

	snapshotStore, err := snapshots.NewStore(snapshotDB, snapshotDir)
	if err != nil {
		panic(err)
	}

	snapshotOptions := snapshottypes.NewSnapshotOptions(
		cast.ToUint64(appOpts.Get(sdkserver.FlagStateSyncSnapshotInterval)),
		cast.ToUint32(appOpts.Get(sdkserver.FlagStateSyncSnapshotKeepRecent)),
	)

	evmosApp := app.NewEvmos(
		logger, db, traceStore, true, skipUpgradeHeights,
		cast.ToString(appOpts.Get(flags.FlagHome)),
		cast.ToUint(appOpts.Get(sdkserver.FlagInvCheckPeriod)),
		a.encCfg,
		appOpts,
		baseapp.SetPruning(pruningOpts),
		baseapp.SetMinGasPrices(cast.ToString(appOpts.Get(sdkserver.FlagMinGasPrices))),
		baseapp.SetHaltHeight(cast.ToUint64(appOpts.Get(sdkserver.FlagHaltHeight))),
		baseapp.SetHaltTime(cast.ToUint64(appOpts.Get(sdkserver.FlagHaltTime))),
		baseapp.SetMinRetainBlocks(cast.ToUint64(appOpts.Get(sdkserver.FlagMinRetainBlocks))),
		baseapp.SetInterBlockCache(cache),
		baseapp.SetTrace(cast.ToBool(appOpts.Get(sdkserver.FlagTrace))),
		baseapp.SetIndexEvents(cast.ToStringSlice(appOpts.Get(sdkserver.FlagIndexEvents))),
		baseapp.SetSnapshot(snapshotStore, snapshotOptions),
		baseapp.SetIAVLCacheSize(cast.ToInt(appOpts.Get(sdkserver.FlagIAVLCacheSize))),
		baseapp.SetIAVLDisableFastNode(cast.ToBool(appOpts.Get(sdkserver.FlagDisableIAVLFastNode))),
	)

	return evmosApp
}

// appExport creates a new simapp (optionally at a given height)
// and exports state.
func (a appCreator) appExport(
	logger log.Logger, db dbm.DB, traceStore io.Writer, height int64, forZeroHeight bool, jailAllowedAddrs []string,
	appOpts servertypes.AppOptions,
) (servertypes.ExportedApp, error) {
	var evmosApp *app.Evmos
	homePath, ok := appOpts.Get(flags.FlagHome).(string)
	if !ok || homePath == "" {
		return servertypes.ExportedApp{}, errors.New("application home not set")
	}

	if height != -1 {
		evmosApp = app.NewEvmos(logger, db, traceStore, false, map[int64]bool{}, "", uint(1), a.encCfg, appOpts)

		if err := evmosApp.LoadHeight(height); err != nil {
			return servertypes.ExportedApp{}, err
		}
	} else {
		evmosApp = app.NewEvmos(logger, db, traceStore, true, map[int64]bool{}, "", uint(1), a.encCfg, appOpts)
	}

	return evmosApp.ExportAppStateAndValidators(forZeroHeight, jailAllowedAddrs)
}

// initTendermintConfig helps to override default Tendermint Config values.
// return tmcfg.DefaultConfig if no custom configuration is required for the application.
func initTendermintConfig() *tmcfg.Config {
	cfg := tmcfg.DefaultConfig()
	cfg.Consensus.TimeoutCommit = time.Second * 3
	// use v0 since v1 severely impacts the node's performance
	cfg.Mempool.Version = tmcfg.MempoolV0

	// to put a higher strain on node memory, use these values:
	// cfg.P2P.MaxNumInboundPeers = 100
	// cfg.P2P.MaxNumOutboundPeers = 40

	return cfg
}
