package genutil

import (
	"encoding/json"

	"github.com/cosmos/cosmos-sdk/codec"
	sdk "github.com/cosmos/cosmos-sdk/types"
	abci "github.com/tendermint/tendermint/abci/types"
)

var (
	_ sdk.AppModuleGenesis = AppModule{}
	_ sdk.AppModuleBasic   = AppModuleBasic{}
)

// module name
const ModuleName = "genutil"

// app module basics object
type AppModuleBasic struct{}

// module name
func (AppModuleBasic) Name() string {
	return ModuleName
}

// register module codec
func (AppModuleBasic) RegisterCodec(cdc *codec.Codec) {}

// default genesis state
func (AppModuleBasic) DefaultGenesis() json.RawMessage {
	return moduleCdc.MustMarshalJSON(GenesisState{})
}

// module validate genesis
func (AppModuleBasic) ValidateGenesis(bz json.RawMessage) error {
	var data GenesisState
	err := moduleCdc.UnmarshalJSON(bz, &data)
	if err != nil {
		return err
	}
	return ValidateGenesis(data)
}

//___________________________
// app module
type AppModule struct {
	AppModuleBasic
	accountKeeper AccountKeeper
	stakingKeeper StakingKeeper
	deliverTx     deliverTxfn
}

// NewAppModule creates a new AppModule object
func NewAppModule(accountKeeper AccountKeeper,
	stakingKeeper StakingKeeper, deliverTx deliverTxfn) sdk.AppModule {

	return sdk.NewGenesisOnlyAppModule(AppModule{
		AppModuleBasic: AppModuleBasic{},
		accountKeeper:  accountKeeper,
		stakingKeeper:  stakingKeeper,
		deliverTx:      deliverTx,
	})
}

// module init-genesis
func (am AppModule) InitGenesis(ctx sdk.Context, data json.RawMessage) []abci.ValidatorUpdate {
	var genesisState GenesisState
	moduleCdc.MustUnmarshalJSON(data, &genesisState)
	return InitGenesis(ctx, moduleCdc, am.stakingKeeper, am.deliverTx, genesisState)
}

// module export genesis
func (am AppModule) ExportGenesis(ctx sdk.Context) json.RawMessage {
	return nil
}