package main

import (
	"fmt"
	"os"
	"path"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"

	"github.com/cosmos/ethermint/app"
	"github.com/cosmos/ethermint/codec"
	emintcrypto "github.com/cosmos/ethermint/crypto"
	"github.com/cosmos/ethermint/rpc"

	tmamino "github.com/tendermint/tendermint/crypto/encoding/amino"
	"github.com/tendermint/tendermint/libs/cli"

	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/client/flags"
	clientkeys "github.com/cosmos/cosmos-sdk/client/keys"
	clientrpc "github.com/cosmos/cosmos-sdk/client/rpc"
	sdkcodec "github.com/cosmos/cosmos-sdk/codec"
	"github.com/cosmos/cosmos-sdk/crypto/keyring"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/version"
	"github.com/cosmos/cosmos-sdk/x/auth"
	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
	"github.com/cosmos/cosmos-sdk/x/bank"
	bankcmd "github.com/cosmos/cosmos-sdk/x/bank/client/cli"
)

var (
	cdc = codec.MakeCodec(app.ModuleBasics)
)

func main() {
	// Configure cobra to sort commands
	cobra.EnableCommandSorting = false

	tmamino.RegisterKeyType(emintcrypto.PubKeySecp256k1{}, emintcrypto.PubKeyAminoName)
	tmamino.RegisterKeyType(emintcrypto.PrivKeySecp256k1{}, emintcrypto.PrivKeyAminoName)

	keyring.CryptoCdc = cdc
	clientkeys.KeysCdc = cdc

	// Read in the configuration file for the sdk
	config := sdk.GetConfig()
	config.SetBech32PrefixForAccount(sdk.Bech32PrefixAccAddr, sdk.Bech32PrefixAccPub)
	config.SetBech32PrefixForValidator(sdk.Bech32PrefixValAddr, sdk.Bech32PrefixValPub)
	config.SetBech32PrefixForConsensusNode(sdk.Bech32PrefixConsAddr, sdk.Bech32PrefixConsPub)
	config.Seal()

	rootCmd := &cobra.Command{
		Use:   "emintcli",
		Short: "Command line interface for interacting with emintd",
	}

	// Add --chain-id to persistent flags and mark it required
	rootCmd.PersistentFlags().String(flags.FlagChainID, "", "Chain ID of tendermint node")
	rootCmd.PersistentPreRunE = func(_ *cobra.Command, _ []string) error {
		return initConfig(rootCmd)
	}

	// Construct Root Command
	rootCmd.AddCommand(
		clientrpc.StatusCommand(),
		client.ConfigCmd(app.DefaultCLIHome),
		queryCmd(cdc),
		txCmd(cdc),
		rpc.EmintServeCmd(cdc),
		flags.LineBreak,
		keyCommands(),
		flags.LineBreak,
		version.Cmd,
		flags.NewCompletionCmd(rootCmd, true),
	)

	// Add flags and prefix all env exposed with EM
	executor := cli.PrepareMainCmd(rootCmd, "EM", app.DefaultCLIHome)

	err := executor.Execute()
	if err != nil {
		panic(fmt.Errorf("failed executing CLI command: %w", err))
	}
}

func queryCmd(cdc *sdkcodec.Codec) *cobra.Command {
	queryCmd := &cobra.Command{
		Use:     "query",
		Aliases: []string{"q"},
		Short:   "Querying subcommands",
	}

	queryCmd.AddCommand(
		authcmd.GetAccountCmd(cdc),
		flags.LineBreak,
		authcmd.QueryTxsByEventsCmd(cdc),
		authcmd.QueryTxCmd(cdc),
		flags.LineBreak,
	)

	// add modules' query commands
	app.ModuleBasics.AddQueryCommands(queryCmd, cdc)

	return queryCmd
}

func txCmd(cdc *sdkcodec.Codec) *cobra.Command {
	txCmd := &cobra.Command{
		Use:   "tx",
		Short: "Transactions subcommands",
	}

	txCmd.AddCommand(
		bankcmd.SendTxCmd(cdc),
		flags.LineBreak,
		authcmd.GetSignCommand(cdc),
		authcmd.GetMultiSignCommand(cdc),
		flags.LineBreak,
		authcmd.GetBroadcastCommand(cdc),
		authcmd.GetEncodeCommand(cdc),
		authcmd.GetDecodeCommand(cdc),
		flags.LineBreak,
	)

	// add modules' tx commands
	app.ModuleBasics.AddTxCommands(txCmd, cdc)

	// remove auth and bank commands as they're mounted under the root tx command
	var cmdsToRemove []*cobra.Command

	for _, cmd := range txCmd.Commands() {
		if cmd.Use == auth.ModuleName || cmd.Use == bank.ModuleName {
			cmdsToRemove = append(cmdsToRemove, cmd)
		}
	}

	txCmd.RemoveCommand(cmdsToRemove...)

	return txCmd
}

func initConfig(cmd *cobra.Command) error {
	home, err := cmd.PersistentFlags().GetString(cli.HomeFlag)
	if err != nil {
		return err
	}

	cfgFile := path.Join(home, "config", "config.toml")
	if _, err := os.Stat(cfgFile); err == nil {
		viper.SetConfigFile(cfgFile)

		if err := viper.ReadInConfig(); err != nil {
			return err
		}
	}
	if err := viper.BindPFlag(flags.FlagChainID, cmd.PersistentFlags().Lookup(flags.FlagChainID)); err != nil {
		return err
	}
	if err := viper.BindPFlag(cli.EncodingFlag, cmd.PersistentFlags().Lookup(cli.EncodingFlag)); err != nil {
		return err
	}
	return viper.BindPFlag(cli.OutputFlag, cmd.PersistentFlags().Lookup(cli.OutputFlag))
}