package main

import (
	"context"
	"io"
	"math/big"
	"os"
	"path/filepath"

	"github.com/cosmos/cosmos-sdk/codec"
	"github.com/cosmos/cosmos-sdk/simapp/params"
	"github.com/cosmos/cosmos-sdk/snapshots"
	"github.com/cosmos/cosmos-sdk/version"
	"github.com/cosmos/cosmos-sdk/x/crisis"

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

	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/debug"
	"github.com/cosmos/cosmos-sdk/client/flags"
	"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/store"
	sdk "github.com/cosmos/cosmos-sdk/types"
	authclient "github.com/cosmos/cosmos-sdk/x/auth/client"
	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
	"github.com/cosmos/cosmos-sdk/x/auth/types"
	vestingcli "github.com/cosmos/cosmos-sdk/x/auth/vesting/client/cli"
	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
	genutilcli "github.com/cosmos/cosmos-sdk/x/genutil/client/cli"

	"github.com/cosmos/ethermint/app"
	ethermintclient "github.com/cosmos/ethermint/client"
	"github.com/cosmos/ethermint/encoding"
)

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

	rootCmd := &cobra.Command{
		Use:   "ethermintd",
		Short: "Ethermint Daemon",
		PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
			if err := client.SetCmdClientContextHandler(initClientCtx, cmd); err != nil {
				return err
			}

			return InterceptConfigsPreRunHandler(cmd)
		},
	}

	initRootCmd(rootCmd, encodingConfig)

	return rootCmd, encodingConfig
}

// Execute executes the root command.
func Execute(rootCmd *cobra.Command) error {
	// Create and set a client.Context on the command's Context. During the pre-run
	// of the root command, a default initialized client.Context is provided to
	// seed child command execution with values such as AccountRetriver, Keyring,
	// and a Tendermint RPC. This requires the use of a pointer reference when
	// getting and setting the client.Context. Ideally, we utilize
	// https://github.com/spf13/cobra/pull/1118.
	ctx := context.Background()
	ctx = context.WithValue(ctx, client.ClientContextKey, &client.Context{})
	ctx = context.WithValue(ctx, sdkserver.ServerContextKey, sdkserver.NewDefaultContext())

	executor := tmcli.PrepareBaseCmd(rootCmd, "", app.DefaultNodeHome)
	return executor.ExecuteContext(ctx)
}

func initRootCmd(rootCmd *cobra.Command, encodingConfig params.EncodingConfig) {
	authclient.Codec = encodingConfig.Marshaler
	sdk.PowerReduction = sdk.NewIntFromBigInt(new(big.Int).Exp(big.NewInt(10), big.NewInt(18), nil))

	rootCmd.AddCommand(
		ethermintclient.ValidateChainID(
			genutilcli.InitCmd(app.ModuleBasics, app.DefaultNodeHome),
		),
		genutilcli.CollectGenTxsCmd(banktypes.GenesisBalancesIterator{}, app.DefaultNodeHome),
		genutilcli.MigrateGenesisCmd(),
		genutilcli.GenTxCmd(app.ModuleBasics, encodingConfig.TxConfig, banktypes.GenesisBalancesIterator{}, app.DefaultNodeHome),
		genutilcli.ValidateGenesisCmd(app.ModuleBasics),
		AddGenesisAccountCmd(app.DefaultNodeHome),
		tmcli.NewCompletionCmd(rootCmd, true),
		ethermintclient.TestnetCmd(app.ModuleBasics, banktypes.GenesisBalancesIterator{}),
		debug.Cmd(),
	)

	tendermintCmd := &cobra.Command{
		Use:   "tendermint",
		Short: "Tendermint subcommands",
	}

	tendermintCmd.AddCommand(
		sdkserver.ShowNodeIDCmd(),
		sdkserver.ShowValidatorCmd(),
		sdkserver.ShowAddressCmd(),
		sdkserver.VersionCmd(),
	)

	rootCmd.AddCommand(
		StartCmd(newApp, app.DefaultNodeHome),
		sdkserver.UnsafeResetAllCmd(),
		flags.LineBreak,
		tendermintCmd,
		sdkserver.ExportCmd(createAppAndExport, app.DefaultNodeHome),
		flags.LineBreak,
		version.NewVersionCommand(),
	)

	// add keybase, auxiliary RPC, query, and tx child commands
	rootCmd.AddCommand(
		rpc.StatusCommand(),
		queryCommand(),
		txCommand(),
		ethermintclient.KeyCommands(app.DefaultNodeHome),
	)
	rootCmd = addTxFlags(rootCmd)

}

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.GetValidateSignaturesCommand(),
		flags.LineBreak,
		authcmd.GetBroadcastCommand(),
		authcmd.GetEncodeCommand(),
		authcmd.GetDecodeCommand(),
		flags.LineBreak,
		vestingcli.GetTxCmd(),
	)

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

	return cmd
}

func 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 := sdk.NewLevelDB("metadata", snapshotDir)
	if err != nil {
		panic(err)
	}
	snapshotStore, err := snapshots.NewStore(snapshotDB, snapshotDir)
	if err != nil {
		panic(err)
	}

	ethermintApp := app.NewEthermintApp(
		logger, db, traceStore, true, skipUpgradeHeights,
		cast.ToString(appOpts.Get(flags.FlagHome)),
		cast.ToUint(appOpts.Get(sdkserver.FlagInvCheckPeriod)),
		encoding.MakeConfig(app.ModuleBasics), // Ideally, we would reuse the one created by NewRootCmd.
		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.SetSnapshotStore(snapshotStore),
		baseapp.SetSnapshotInterval(cast.ToUint64(appOpts.Get(sdkserver.FlagStateSyncSnapshotInterval))),
		baseapp.SetSnapshotKeepRecent(cast.ToUint32(appOpts.Get(sdkserver.FlagStateSyncSnapshotKeepRecent))),
	)

	return ethermintApp
}

// createAppAndExport creates a new Ethermint app (optionally at a given height)
// and exports state.
func createAppAndExport(
	logger log.Logger, db dbm.DB, traceStore io.Writer, height int64, forZeroHeight bool, jailAllowedAddrs []string,
	appOpts servertypes.AppOptions,
) (servertypes.ExportedApp, error) {
	encCfg := encoding.MakeConfig(app.ModuleBasics) // Ideally, we would reuse the one created by NewRootCmd.
	encCfg.Marshaler = codec.NewProtoCodec(encCfg.InterfaceRegistry)
	var ethermintApp *app.EthermintApp
	if height != -1 {
		ethermintApp = app.NewEthermintApp(logger, db, traceStore, false, map[int64]bool{}, "", uint(1), encCfg, appOpts)

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

	return ethermintApp.ExportAppStateAndValidators(forZeroHeight, jailAllowedAddrs)
}