package main

import (
	"errors"
	"io"
	"os"

	cmtcfg "github.com/cometbft/cometbft/config"
	dbm "github.com/cosmos/cosmos-db"
	"github.com/spf13/cast"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"

	"github.com/sonr-io/sonr/app"
	util "github.com/sonr-io/sonr/app/commands"
	didcli "github.com/sonr-io/sonr/x/did/client/cli"
	dwncli "github.com/sonr-io/sonr/x/dwn/client/cli"

	"cosmossdk.io/log"
	confixcmd "cosmossdk.io/tools/confix/cmd"

	cmtcli "github.com/cometbft/cometbft/libs/cli"
	"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/pruning"
	"github.com/cosmos/cosmos-sdk/client/rpc"
	"github.com/cosmos/cosmos-sdk/client/snapshot"
	"github.com/cosmos/cosmos-sdk/server"
	serverconfig "github.com/cosmos/cosmos-sdk/server/config"
	servertypes "github.com/cosmos/cosmos-sdk/server/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
	authcmd "github.com/cosmos/cosmos-sdk/x/auth/client/cli"
	"github.com/cosmos/cosmos-sdk/x/crisis"
	genutilcli "github.com/cosmos/cosmos-sdk/x/genutil/client/cli"
	evmosserverconfig "github.com/cosmos/evm/server/config"

	evmoscmd "github.com/cosmos/evm/client"
	evmosserver "github.com/cosmos/evm/server"
	srvflags "github.com/cosmos/evm/server/flags"
)

// AddCustomCommands adds custom commands to the root command
func AddCustomCommands(rootCmd *cobra.Command) {
	didcli.AddAuthCmds(rootCmd)
	dwncli.AddWalletCmds(rootCmd)
	rootCmd.AddCommand(util.GovCmd())

	// Add VRF keys management to keys command
	keysCmd := findKeysCommand(rootCmd)
	if keysCmd != nil {
		keysCmd.AddCommand(util.VRFKeysCmd())
	}
}

// findKeysCommand finds the keys command in the root command
func findKeysCommand(rootCmd *cobra.Command) *cobra.Command {
	for _, cmd := range rootCmd.Commands() {
		if cmd.Name() == "keys" {
			return cmd
		}
	}
	return nil
}

// initCometBFTConfig helps to override default CometBFT Config values.
// return cmtcfg.DefaultConfig if no custom configuration is required for the application.
func initCometBFTConfig() *cmtcfg.Config {
	cfg := cmtcfg.DefaultConfig()

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

	return cfg
}

type CustomAppConfig struct {
	serverconfig.Config

	EVM     evmosserverconfig.EVMConfig
	JSONRPC evmosserverconfig.JSONRPCConfig
	TLS     evmosserverconfig.TLSConfig
}

// initAppConfig helps to override default appConfig template and configs.
// return "", nil if no custom configuration is required for the application.
func initAppConfig() (string, any) {
	// The following code snippet is just for reference.

	// Optionally allow the chain developer to overwrite the SDK's default
	// server config.
	srvCfg := serverconfig.DefaultConfig()
	// The SDK's default minimum gas price is set to "" (empty value) inside
	// app.toml. If left empty by validators, the node will halt on startup.
	// However, the chain developer can set a default app.toml value for their
	// validators here.
	//
	// In summary:
	// - if you leave srvCfg.MinGasPrices = "", all validators MUST tweak their
	//   own app.toml config,
	// - if you set srvCfg.MinGasPrices non-empty, validators CAN tweak their
	//   own app.toml to override, or use this default value.
	//
	// In simapp, we set the min gas prices to 0.
	srvCfg.MinGasPrices = "0stake"
	// srvCfg.BaseConfig.IAVLDisableFastNode = true // disable fastnode by default

	customAppConfig := CustomAppConfig{
		Config:  *srvCfg,
		EVM:     *evmosserverconfig.DefaultEVMConfig(),
		JSONRPC: *evmosserverconfig.DefaultJSONRPCConfig(),
		TLS:     *evmosserverconfig.DefaultTLSConfig(),
	}

	customAppTemplate := serverconfig.DefaultConfigTemplate

	customAppTemplate += evmosserverconfig.DefaultEVMConfigTemplate

	return customAppTemplate, customAppConfig
}

func initRootCmd(
	rootCmd *cobra.Command,
	chainApp *app.ChainApp,
) {
	cfg := sdk.GetConfig()
	cfg.Seal()

	rootCmd.AddCommand(
		util.EnhancedInit(chainApp),
		genutilcli.Commands(chainApp.TxConfig(), chainApp.BasicModuleManager, app.DefaultNodeHome),
		cmtcli.NewCompletionCmd(rootCmd, true),
		debug.Cmd(),
		confixcmd.ConfigCommand(),
		pruning.Cmd(newApp, app.DefaultNodeHome),
		snapshot.Cmd(newApp),
	)

	// add EVM' flavored TM commands to start server, etc.
	evmosserver.AddCommands(
		rootCmd,
		evmosserver.NewDefaultStartOptions(newApp, app.DefaultNodeHome),
		appExport,
		addModuleInitFlags,
	)

	// add EVM key commands
	rootCmd.AddCommand(
		evmoscmd.KeyCommands(app.DefaultNodeHome, true),
	)

	// add keybase, auxiliary RPC, query, genesis, and tx child commands
	rootCmd.AddCommand(
		server.StatusCommand(),

		queryCommand(),
		txCommand(),
	)

	// add general tx flags to the root command
	_, err := srvflags.AddTxFlags(rootCmd)
	if err != nil {
		panic(err)
	}

	// Add custom commands
	AddCustomCommands(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:         false,
		SuggestionsMinimumDistance: 2,
		RunE:                       client.ValidateCmd,
	}

	cmd.AddCommand(
		rpc.QueryEventForTxCmd(),
		rpc.ValidatorCommand(),
		authcmd.QueryTxsByEventsCmd(),
		authcmd.QueryTxCmd(),
		server.QueryBlocksCmd(),
		server.QueryBlockResultsCmd(),
	)

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

	return cmd
}

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

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

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

	return cmd
}

// newApp creates the application
func newApp(
	logger log.Logger,
	db dbm.DB,
	traceStore io.Writer,
	appOpts servertypes.AppOptions,
) servertypes.Application {
	baseappOptions := server.DefaultBaseappOptions(appOpts)

	if cast.ToBool(appOpts.Get("telemetry.enabled")) {
		// TODO: Implement telemetry configuration
		// This should set up telemetry options such as:
		// - Metrics collection endpoints
		// - Sampling rates
		// - Export intervals
		// - Custom labels and tags
		// Consider using baseappOptions.SetTelemetry() or similar
	}

	return app.NewChainApp(
		logger, db, traceStore, true,
		appOpts,
		app.EVMAppOptions,
		baseappOptions...,
	)
}

func appExport(
	logger log.Logger,
	db dbm.DB,
	traceStore io.Writer,
	height int64,
	forZeroHeight bool,
	jailAllowedAddrs []string,
	appOpts servertypes.AppOptions,
	modulesToExport []string,
) (servertypes.ExportedApp, error) {
	var chainApp *app.ChainApp
	// this check is necessary as we use the flag in x/upgrade.
	// we can exit more gracefully by checking the flag here.
	homePath, ok := appOpts.Get(flags.FlagHome).(string)
	if !ok || homePath == "" {
		return servertypes.ExportedApp{}, errors.New("application home is not set")
	}

	viperAppOpts, ok := appOpts.(*viper.Viper)
	if !ok {
		return servertypes.ExportedApp{}, errors.New("appOpts is not viper.Viper")
	}

	// overwrite the FlagInvCheckPeriod
	viperAppOpts.Set(server.FlagInvCheckPeriod, 1)
	appOpts = viperAppOpts

	chainApp = app.NewChainApp(
		logger,
		db,
		traceStore,
		height == -1,
		appOpts,
		app.EVMAppOptions,
	)

	if height != -1 {
		if err := chainApp.LoadHeight(height); err != nil {
			return servertypes.ExportedApp{}, err
		}
	}

	return chainApp.ExportAppStateAndValidators(forZeroHeight, jailAllowedAddrs, modulesToExport)
}

var tempDir = func() string {
	dir, err := os.MkdirTemp("", "simd")
	if err != nil {
		panic("failed to create temp dir: " + err.Error())
	}
	defer os.RemoveAll(dir)

	return dir
}