package simapp

import (
	_ "embed"
	"io"
	"net/http"
	"os"
	"path/filepath"

	"github.com/gorilla/mux"
	"github.com/rakyll/statik/fs"
	"github.com/spf13/cast"
	abci "github.com/tendermint/tendermint/abci/types"
	"github.com/tendermint/tendermint/libs/log"
	tmos "github.com/tendermint/tendermint/libs/os"
	dbm "github.com/tendermint/tm-db"

	"cosmossdk.io/core/appconfig"
	"github.com/cosmos/cosmos-sdk/depinject"

	"github.com/cosmos/cosmos-sdk/baseapp"
	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/codec"
	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
	"github.com/cosmos/cosmos-sdk/runtime"
	"github.com/cosmos/cosmos-sdk/server/api"
	"github.com/cosmos/cosmos-sdk/server/config"
	servertypes "github.com/cosmos/cosmos-sdk/server/types"
	simappparams "github.com/cosmos/cosmos-sdk/simapp/params"
	"github.com/cosmos/cosmos-sdk/store/streaming"
	storetypes "github.com/cosmos/cosmos-sdk/store/types"
	"github.com/cosmos/cosmos-sdk/testutil/testdata_pulsar"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/module"
	"github.com/cosmos/cosmos-sdk/x/auth"
	authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
	authsims "github.com/cosmos/cosmos-sdk/x/auth/simulation"
	_ "github.com/cosmos/cosmos-sdk/x/auth/tx/module" // import for side-effects
	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
	"github.com/cosmos/cosmos-sdk/x/auth/vesting"
	vestingtypes "github.com/cosmos/cosmos-sdk/x/auth/vesting/types"
	"github.com/cosmos/cosmos-sdk/x/authz"
	authzkeeper "github.com/cosmos/cosmos-sdk/x/authz/keeper"
	authzmodule "github.com/cosmos/cosmos-sdk/x/authz/module"
	"github.com/cosmos/cosmos-sdk/x/bank"
	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
	"github.com/cosmos/cosmos-sdk/x/capability"
	capabilitykeeper "github.com/cosmos/cosmos-sdk/x/capability/keeper"
	capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
	"github.com/cosmos/cosmos-sdk/x/crisis"
	crisiskeeper "github.com/cosmos/cosmos-sdk/x/crisis/keeper"
	crisistypes "github.com/cosmos/cosmos-sdk/x/crisis/types"
	distr "github.com/cosmos/cosmos-sdk/x/distribution"
	distrclient "github.com/cosmos/cosmos-sdk/x/distribution/client"
	distrkeeper "github.com/cosmos/cosmos-sdk/x/distribution/keeper"
	distrtypes "github.com/cosmos/cosmos-sdk/x/distribution/types"
	"github.com/cosmos/cosmos-sdk/x/evidence"
	evidencekeeper "github.com/cosmos/cosmos-sdk/x/evidence/keeper"
	evidencetypes "github.com/cosmos/cosmos-sdk/x/evidence/types"
	"github.com/cosmos/cosmos-sdk/x/feegrant"
	feegrantkeeper "github.com/cosmos/cosmos-sdk/x/feegrant/keeper"
	feegrantmodule "github.com/cosmos/cosmos-sdk/x/feegrant/module"
	"github.com/cosmos/cosmos-sdk/x/genutil"
	genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
	"github.com/cosmos/cosmos-sdk/x/gov"
	govclient "github.com/cosmos/cosmos-sdk/x/gov/client"
	govkeeper "github.com/cosmos/cosmos-sdk/x/gov/keeper"
	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
	govv1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
	govv1beta1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1beta1"
	"github.com/cosmos/cosmos-sdk/x/group"
	groupkeeper "github.com/cosmos/cosmos-sdk/x/group/keeper"
	groupmodule "github.com/cosmos/cosmos-sdk/x/group/module"
	"github.com/cosmos/cosmos-sdk/x/mint"
	mintkeeper "github.com/cosmos/cosmos-sdk/x/mint/keeper"
	minttypes "github.com/cosmos/cosmos-sdk/x/mint/types"
	"github.com/cosmos/cosmos-sdk/x/nft"
	nftkeeper "github.com/cosmos/cosmos-sdk/x/nft/keeper"
	nftmodule "github.com/cosmos/cosmos-sdk/x/nft/module"
	"github.com/cosmos/cosmos-sdk/x/params"
	paramsclient "github.com/cosmos/cosmos-sdk/x/params/client"
	paramskeeper "github.com/cosmos/cosmos-sdk/x/params/keeper"
	paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
	paramproposal "github.com/cosmos/cosmos-sdk/x/params/types/proposal"
	"github.com/cosmos/cosmos-sdk/x/slashing"
	slashingkeeper "github.com/cosmos/cosmos-sdk/x/slashing/keeper"
	slashingtypes "github.com/cosmos/cosmos-sdk/x/slashing/types"
	"github.com/cosmos/cosmos-sdk/x/staking"
	stakingkeeper "github.com/cosmos/cosmos-sdk/x/staking/keeper"
	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
	"github.com/cosmos/cosmos-sdk/x/upgrade"
	upgradeclient "github.com/cosmos/cosmos-sdk/x/upgrade/client"
	upgradekeeper "github.com/cosmos/cosmos-sdk/x/upgrade/keeper"
	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"

	// unnamed import of statik for swagger UI support
	_ "github.com/cosmos/cosmos-sdk/client/docs/statik"
)

const appName = "SimApp"

var (
	// DefaultNodeHome default home directories for the application daemon
	DefaultNodeHome string

	// ModuleBasics defines the module BasicManager is in charge of setting up basic,
	// non-dependant module elements, such as codec registration
	// and genesis verification.
	ModuleBasics = module.NewBasicManager(
		auth.AppModuleBasic{},
		genutil.AppModuleBasic{},
		bank.AppModuleBasic{},
		capability.AppModuleBasic{},
		staking.AppModuleBasic{},
		mint.AppModuleBasic{},
		distr.AppModuleBasic{},
		gov.NewAppModuleBasic(
			[]govclient.ProposalHandler{paramsclient.ProposalHandler, distrclient.ProposalHandler, upgradeclient.LegacyProposalHandler, upgradeclient.LegacyCancelProposalHandler},
		),
		params.AppModuleBasic{},
		crisis.AppModuleBasic{},
		slashing.AppModuleBasic{},
		feegrantmodule.AppModuleBasic{},
		upgrade.AppModuleBasic{},
		evidence.AppModuleBasic{},
		authzmodule.AppModuleBasic{},
		groupmodule.AppModuleBasic{},
		vesting.AppModuleBasic{},
		nftmodule.AppModuleBasic{},
	)

	// module account permissions
	maccPerms = map[string][]string{
		authtypes.FeeCollectorName:     nil,
		distrtypes.ModuleName:          nil,
		minttypes.ModuleName:           {authtypes.Minter},
		stakingtypes.BondedPoolName:    {authtypes.Burner, authtypes.Staking},
		stakingtypes.NotBondedPoolName: {authtypes.Burner, authtypes.Staking},
		govtypes.ModuleName:            {authtypes.Burner},
		nft.ModuleName:                 nil,
	}
)

var (
	_ App                     = (*SimApp)(nil)
	_ servertypes.Application = (*SimApp)(nil)
)

// SimApp extends an ABCI application, but with most of its parameters exported.
// They are exported for convenience in creating helper functions, as object
// capabilities aren't needed for testing.
type SimApp struct {
	*runtime.App
	legacyAmino       *codec.LegacyAmino
	appCodec          codec.Codec
	interfaceRegistry codectypes.InterfaceRegistry

	invCheckPeriod uint

	// keys to access the substores
	keys map[string]*storetypes.KVStoreKey

	// keepers
	AccountKeeper    authkeeper.AccountKeeper
	BankKeeper       bankkeeper.Keeper
	CapabilityKeeper *capabilitykeeper.Keeper
	StakingKeeper    *stakingkeeper.Keeper
	SlashingKeeper   slashingkeeper.Keeper
	MintKeeper       mintkeeper.Keeper
	DistrKeeper      distrkeeper.Keeper
	GovKeeper        govkeeper.Keeper
	CrisisKeeper     crisiskeeper.Keeper
	UpgradeKeeper    upgradekeeper.Keeper
	ParamsKeeper     paramskeeper.Keeper
	AuthzKeeper      authzkeeper.Keeper
	EvidenceKeeper   evidencekeeper.Keeper
	FeeGrantKeeper   feegrantkeeper.Keeper
	GroupKeeper      groupkeeper.Keeper
	NFTKeeper        nftkeeper.Keeper

	// simulation manager
	sm *module.SimulationManager
}

func init() {
	userHomeDir, err := os.UserHomeDir()
	if err != nil {
		panic(err)
	}

	DefaultNodeHome = filepath.Join(userHomeDir, ".simapp")
}

//go:embed app.yaml
var appConfigYaml []byte

var AppConfig = appconfig.LoadYAML(appConfigYaml)

// NewSimApp returns a reference to an initialized SimApp.
func NewSimApp(
	logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool, skipUpgradeHeights map[int64]bool,
	homePath string, invCheckPeriod uint, encodingConfig simappparams.EncodingConfig,
	appOpts servertypes.AppOptions, baseAppOptions ...func(*baseapp.BaseApp),
) *SimApp {
	app := &SimApp{
		invCheckPeriod: invCheckPeriod,
	}

	var appBuilder *runtime.AppBuilder

	if err := depinject.Inject(AppConfig,
		&appBuilder,
		&app.ParamsKeeper,
		&app.CapabilityKeeper,
		&app.appCodec,
		&app.legacyAmino,
		&app.interfaceRegistry,
		&app.AccountKeeper,
		&app.BankKeeper,
		&app.AuthzKeeper,
		&app.FeeGrantKeeper,
		&app.StakingKeeper,
		&app.GroupKeeper,
		&app.NFTKeeper,
		&app.SlashingKeeper,
		&app.MintKeeper,
		&app.EvidenceKeeper,
		&app.DistrKeeper,
	); err != nil {
		panic(err)
	}

	app.App = appBuilder.Build(logger, db, traceStore, baseAppOptions...)

	app.keys = sdk.NewKVStoreKeys(
		govtypes.StoreKey,
		upgradetypes.StoreKey,
	)

	// configure state listening capabilities using AppOptions
	// we are doing nothing with the returned streamingServices and waitGroup in this case
	if _, _, err := streaming.LoadStreamingServices(app.App.BaseApp, appOpts, app.appCodec, app.keys); err != nil {
		tmos.Exit(err.Error())
	}

	initParamsKeeper(app.ParamsKeeper)

	app.CrisisKeeper = crisiskeeper.NewKeeper(
		app.GetSubspace(crisistypes.ModuleName), invCheckPeriod, app.BankKeeper, authtypes.FeeCollectorName,
	)

	app.StakingKeeper.SetHooks(
		stakingtypes.NewMultiStakingHooks(app.DistrKeeper.Hooks(), app.SlashingKeeper.Hooks()),
	)

	// register the proposal types
	govRouter := govv1beta1.NewRouter()
	govRouter.AddRoute(govtypes.RouterKey, govv1beta1.ProposalHandler).
		AddRoute(paramproposal.RouterKey, params.NewParamChangeProposalHandler(app.ParamsKeeper)).
		AddRoute(distrtypes.RouterKey, distr.NewCommunityPoolSpendProposalHandler(app.DistrKeeper)).
		AddRoute(upgradetypes.RouterKey, upgrade.NewSoftwareUpgradeProposalHandler(app.UpgradeKeeper))
	govConfig := govtypes.DefaultConfig()
	/*
		Example of setting gov params:
		govConfig.MaxMetadataLen = 10000
	*/
	govKeeper := govkeeper.NewKeeper(
		app.appCodec, app.keys[govtypes.StoreKey], app.GetSubspace(govtypes.ModuleName), app.AccountKeeper, app.BankKeeper,
		app.StakingKeeper, govRouter, app.MsgServiceRouter(), govConfig,
	)

	app.GovKeeper = *govKeeper.SetHooks(
		govtypes.NewMultiGovHooks(
		// register the governance hooks
		),
	)
	// set the governance module account as the authority for conducting upgrades
	app.UpgradeKeeper = upgradekeeper.NewKeeper(skipUpgradeHeights, app.keys[upgradetypes.StoreKey], app.appCodec, homePath, app.BaseApp, authtypes.NewModuleAddress(govtypes.ModuleName).String())

	/****  Module Options ****/

	// NOTE: we may consider parsing `appOpts` inside module constructors. For the moment
	// we prefer to be more strict in what arguments the modules expect.
	skipGenesisInvariants := cast.ToBool(appOpts.Get(crisis.FlagSkipGenesisInvariants))

	// NOTE: Any module instantiated in the module manager that is later modified
	// must be passed by reference here.
	if err := app.RegisterModules(
		crisis.NewAppModule(&app.CrisisKeeper, skipGenesisInvariants),
		gov.NewAppModule(app.appCodec, app.GovKeeper, app.AccountKeeper, app.BankKeeper),
		upgrade.NewAppModule(app.UpgradeKeeper),
	); err != nil {
		panic(err)
	}

	// NOTE: The genutils module must occur after staking so that pools are
	// properly initialized with tokens from genesis accounts.
	// NOTE: The genutils module must also occur after auth so that it can access the params from auth.
	// NOTE: Capability module must occur first so that it can initialize any capabilities
	// so that other modules that want to create or claim capabilities afterwards in InitChain
	// can do so safely.
	genesisModuleOrder := []string{
		capabilitytypes.ModuleName, authtypes.ModuleName, banktypes.ModuleName,
		distrtypes.ModuleName, stakingtypes.ModuleName, slashingtypes.ModuleName, govtypes.ModuleName,
		minttypes.ModuleName, crisistypes.ModuleName, genutiltypes.ModuleName, evidencetypes.ModuleName, authz.ModuleName,
		feegrant.ModuleName, nft.ModuleName, group.ModuleName, paramstypes.ModuleName, upgradetypes.ModuleName,
		vestingtypes.ModuleName,
	}
	app.ModuleManager.SetOrderInitGenesis(genesisModuleOrder...)
	app.ModuleManager.SetOrderExportGenesis(genesisModuleOrder...)

	// Uncomment if you want to set a custom migration order here.
	// app.ModuleManager.SetOrderMigrations(custom order)

	app.ModuleManager.RegisterInvariants(&app.CrisisKeeper)
	app.ModuleManager.RegisterRoutes(app.Router(), app.QueryRouter(), encodingConfig.Amino)

	// RegisterUpgradeHandlers is used for registering any on-chain upgrades.
	// Make sure it's called after `app.ModuleManager` and `app.configurator` are set.
	app.RegisterUpgradeHandlers()

	// add test gRPC service for testing gRPC queries in isolation
	testdata_pulsar.RegisterQueryServer(app.GRPCQueryRouter(), testdata_pulsar.QueryImpl{})

	// create the simulation manager and define the order of the modules for deterministic simulations
	//
	// NOTE: this is not required apps that don't use the simulator for fuzz testing
	// transactions
	overrideModules := map[string]module.AppModuleSimulation{
		authtypes.ModuleName: auth.NewAppModule(app.appCodec, app.AccountKeeper, authsims.RandomGenesisAccounts),
	}
	app.sm = module.NewSimulationManagerFromAppModules(app.ModuleManager.Modules, overrideModules)

	app.sm.RegisterStoreDecoders()

	// initialize stores
	app.MountKVStores(app.keys)

	// initialize BaseApp
	app.SetInitChainer(app.InitChainer)

	if err := app.Load(loadLatest); err != nil {
		panic(err)
	}

	return app
}

// Name returns the name of the App
func (app *SimApp) Name() string { return app.BaseApp.Name() }

// InitChainer application update at chain initialization
func (app *SimApp) InitChainer(ctx sdk.Context, req abci.RequestInitChain) abci.ResponseInitChain {
	app.UpgradeKeeper.SetModuleVersionMap(ctx, app.ModuleManager.GetVersionMap())
	return app.App.InitChainer(ctx, req)
}

// LoadHeight loads a particular height
func (app *SimApp) LoadHeight(height int64) error {
	return app.LoadVersion(height)
}

// LegacyAmino returns SimApp's amino codec.
//
// NOTE: This is solely to be used for testing purposes as it may be desirable
// for modules to register their own custom testing types.
func (app *SimApp) LegacyAmino() *codec.LegacyAmino {
	return app.legacyAmino
}

// AppCodec returns SimApp's app codec.
//
// NOTE: This is solely to be used for testing purposes as it may be desirable
// for modules to register their own custom testing types.
func (app *SimApp) AppCodec() codec.Codec {
	return app.appCodec
}

// InterfaceRegistry returns SimApp's InterfaceRegistry
func (app *SimApp) InterfaceRegistry() codectypes.InterfaceRegistry {
	return app.interfaceRegistry
}

// GetKey returns the KVStoreKey for the provided store key.
//
// NOTE: This is solely to be used for testing purposes.
func (app *SimApp) GetKey(storeKey string) *storetypes.KVStoreKey {
	kvsk := app.keys[storeKey]
	if kvsk != nil {
		return kvsk
	}

	sk := app.UnsafeFindStoreKey(storeKey)
	kvStoreKey, ok := sk.(*storetypes.KVStoreKey)
	if !ok {
		return nil
	}
	return kvStoreKey
}

// GetSubspace returns a param subspace for a given module name.
//
// NOTE: This is solely to be used for testing purposes.
func (app *SimApp) GetSubspace(moduleName string) paramstypes.Subspace {
	subspace, _ := app.ParamsKeeper.GetSubspace(moduleName)
	return subspace
}

// SimulationManager implements the SimulationApp interface
func (app *SimApp) SimulationManager() *module.SimulationManager {
	return app.sm
}

// RegisterAPIRoutes registers all application module routes with the provided
// API server.
func (app *SimApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
	app.App.RegisterAPIRoutes(apiSvr, apiConfig)

	// register swagger API from root so that other applications can override easily
	if apiConfig.Swagger {
		RegisterSwaggerAPI(apiSvr.ClientCtx, apiSvr.Router)
	}
}

// RegisterSwaggerAPI registers swagger route with API Server
func RegisterSwaggerAPI(_ client.Context, rtr *mux.Router) {
	statikFS, err := fs.New()
	if err != nil {
		panic(err)
	}

	staticServer := http.FileServer(statikFS)
	rtr.PathPrefix("/swagger/").Handler(http.StripPrefix("/swagger/", staticServer))
}

// GetMaccPerms returns a copy of the module account permissions
func GetMaccPerms() map[string][]string {
	dupMaccPerms := make(map[string][]string)
	for k, v := range maccPerms {
		dupMaccPerms[k] = v
	}
	return dupMaccPerms
}

// initParamsKeeper init params keeper and its subspaces
func initParamsKeeper(paramsKeeper paramskeeper.Keeper) {
	paramsKeeper.Subspace(govtypes.ModuleName).WithKeyTable(govv1.ParamKeyTable())
	paramsKeeper.Subspace(crisistypes.ModuleName)
}