package envoy

import (
	"context"
	"encoding/json"
	"fmt"

	"github.com/gorilla/mux"
	"github.com/grpc-ecosystem/grpc-gateway/runtime"
	"github.com/spf13/cobra"

	abci "github.com/tendermint/tendermint/abci/types"

	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/codec"
	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/module"

	"github.com/mars-protocol/hub/v2/x/envoy/client/cli"
	"github.com/mars-protocol/hub/v2/x/envoy/keeper"
	"github.com/mars-protocol/hub/v2/x/envoy/types"
)

var (
	_ module.AppModule      = AppModule{}
	_ module.AppModuleBasic = AppModuleBasic{}
)

//------------------------------------------------------------------------------
// AppModuleBasic
//------------------------------------------------------------------------------

// AppModuleBasic defines the basic application module used by the module
type AppModuleBasic struct{}

func (AppModuleBasic) Name() string {
	return types.ModuleName
}

func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry) {
	types.RegisterInterfaces(registry)
}

func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
	return cdc.MustMarshalJSON(types.DefaultGenesisState())
}

func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, _ client.TxEncodingConfig, bz json.RawMessage) error {
	var gs types.GenesisState
	if err := cdc.UnmarshalJSON(bz, &gs); err != nil {
		return fmt.Errorf("failed to unmarshal %s genesis state: %w", types.ModuleName, err)
	}

	return gs.Validate()
}

func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
	if err := types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx)); err != nil {
		panic(err)
	}
}

func (AppModuleBasic) GetTxCmd() *cobra.Command {
	return cli.GetTxCmd()
}

func (AppModuleBasic) GetQueryCmd() *cobra.Command {
	return cli.GetQueryCmd()
}

//------------------------------------------------------------------------------
// AppModule
//------------------------------------------------------------------------------

// AppModule implements an application module for the envoy module
type AppModule struct {
	AppModuleBasic

	keeper keeper.Keeper
}

// NewAppModule creates a new AppModule object
func NewAppModule(keeper keeper.Keeper) AppModule {
	return AppModule{AppModuleBasic{}, keeper}
}

func (am AppModule) RegisterInvariants(_ sdk.InvariantRegistry) {
}

func (am AppModule) RegisterServices(cfg module.Configurator) {
	types.RegisterMsgServer(cfg.MsgServer(), keeper.NewMsgServerImpl(am.keeper))
	types.RegisterQueryServer(cfg.QueryServer(), keeper.NewQueryServerImpl(am.keeper))
}

func (AppModule) ConsensusVersion() uint64 {
	return 1
}

func (am AppModule) BeginBlock(_ sdk.Context, _ abci.RequestBeginBlock) {
}

func (AppModule) EndBlock(_ sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {
	return []abci.ValidatorUpdate{}
}

func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) []abci.ValidatorUpdate {
	var genesisState types.GenesisState
	cdc.MustUnmarshalJSON(data, &genesisState)

	am.keeper.InitGenesis(ctx, &genesisState)

	return []abci.ValidatorUpdate{}
}

func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
	gs := am.keeper.ExportGenesis(ctx)
	return cdc.MustMarshalJSON(gs)
}

//------------------------------------------------------------------------------
// Migration
//------------------------------------------------------------------------------

// InitModule is similar to InitGenesis, but used during chain upgrades.
func (am AppModule) InitModule(ctx sdk.Context) {
	am.keeper.InitGenesis(ctx, &types.GenesisState{})
}

//------------------------------------------------------------------------------
// Deprecated stuff
//------------------------------------------------------------------------------

// deprecated
func (AppModuleBasic) RegisterLegacyAminoCodec(_ *codec.LegacyAmino) {
}

// deprecated
func (AppModuleBasic) RegisterRESTRoutes(_ client.Context, _ *mux.Router) {
}

// deprecated
func (AppModule) Route() sdk.Route {
	return sdk.Route{}
}

// deprecated
func (AppModule) QuerierRoute() string {
	return types.QuerierRoute
}

// deprecated
func (AppModule) LegacyQuerierHandler(*codec.LegacyAmino) sdk.Querier {
	return nil
}
