package protocolpool

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

	gwruntime "github.com/grpc-ecosystem/grpc-gateway/runtime"

	modulev1 "cosmossdk.io/api/cosmos/protocolpool/module/v1"
	"cosmossdk.io/core/appmodule"
	storetypes "cosmossdk.io/core/store"
	"cosmossdk.io/depinject"
	am "cosmossdk.io/depinject/appmodule"
	authtypes "cosmossdk.io/x/auth/types"
	"cosmossdk.io/x/protocolpool/keeper"
	"cosmossdk.io/x/protocolpool/simulation"
	"cosmossdk.io/x/protocolpool/types"

	"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/types/module"
	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
)

// ConsensusVersion defines the current x/protocolpool module consensus version.
const ConsensusVersion = 1

var (
	_ module.AppModuleBasic = AppModule{}

	_ module.AppModule           = AppModule{}
	_ module.AppModuleSimulation = AppModule{}
	_ module.HasGenesis          = AppModule{}
)

// AppModuleBasic defines the basic application module used by the pool module.
type AppModuleBasic struct {
	cdc codec.Codec
}

// Name returns the pool module's name.
func (AppModuleBasic) Name() string { return types.ModuleName }

// RegisterLegacyAminoCodec registers the pool module's types on the LegacyAmino codec.
func (AppModuleBasic) RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {}

// RegisterGRPCGatewayRoutes registers the gRPC Gateway routes
func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *gwruntime.ServeMux) {
	if err := types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx)); err != nil {
		panic(err)
	}
}

// RegisterInterfaces registers interfaces and implementations of the bank module.
func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry) {
	types.RegisterInterfaces(registry)
}

// DefaultGenesis returns default genesis state as raw bytes for the protocolpool
// module.
func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
	return cdc.MustMarshalJSON(types.DefaultGenesisState())
}

// ValidateGenesis performs genesis state validation for the protocolpool module.
func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, config client.TxEncodingConfig, bz json.RawMessage) error {
	var data types.GenesisState
	if err := cdc.UnmarshalJSON(bz, &data); err != nil {
		return fmt.Errorf("failed to unmarshal %s genesis state: %w", types.ModuleName, err)
	}

	return types.ValidateGenesis(&data)
}

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

	keeper        keeper.Keeper
	accountKeeper types.AccountKeeper
	bankKeeper    types.BankKeeper
}

var _ appmodule.AppModule = AppModule{}

// IsOnePerModuleType implements the depinject.OnePerModuleType interface.
func (am AppModule) IsOnePerModuleType() {}

// IsAppModule implements the appmodule.AppModule interface.
func (am AppModule) IsAppModule() {}

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

// NewAppModule creates a new AppModule object
func NewAppModule(cdc codec.Codec, keeper keeper.Keeper,
	accountKeeper types.AccountKeeper, bankKeeper types.BankKeeper,
) AppModule {
	return AppModule{
		AppModuleBasic: AppModuleBasic{cdc: cdc},
		keeper:         keeper,
		accountKeeper:  accountKeeper,
		bankKeeper:     bankKeeper,
	}
}

// InitGenesis performs genesis initialization for the protocolpool module.
func (am AppModule) InitGenesis(ctx context.Context, cdc codec.JSONCodec, data json.RawMessage) {
	var genesisState types.GenesisState
	cdc.MustUnmarshalJSON(data, &genesisState)
	if err := am.keeper.InitGenesis(ctx, &genesisState); err != nil {
		panic(err)
	}
}

// ExportGenesis returns the exported genesis state as raw bytes for the protocolpool
// module.
func (am AppModule) ExportGenesis(ctx context.Context, cdc codec.JSONCodec) json.RawMessage {
	gs, err := am.keeper.ExportGenesis(ctx)
	if err != nil {
		panic(err)
	}
	return cdc.MustMarshalJSON(gs)
}

// ConsensusVersion implements AppModule/ConsensusVersion.
func (AppModule) ConsensusVersion() uint64 { return ConsensusVersion }

//
// App Wiring Setup
//

func init() {
	am.Register(
		&modulev1.Module{},
		am.Provide(ProvideModule),
	)
}

type ModuleInputs struct {
	depinject.In

	Config       *modulev1.Module
	Codec        codec.Codec
	StoreService storetypes.KVStoreService

	AccountKeeper types.AccountKeeper
	BankKeeper    types.BankKeeper
	StakingKeeper types.StakingKeeper
}

type ModuleOutputs struct {
	depinject.Out

	Keeper keeper.Keeper
	Module appmodule.AppModule
}

func ProvideModule(in ModuleInputs) ModuleOutputs {
	// default to governance authority if not provided
	authority := authtypes.NewModuleAddress("gov")
	if in.Config.Authority != "" {
		authority = authtypes.NewModuleAddressOrBech32Address(in.Config.Authority)
	}

	k := keeper.NewKeeper(in.Codec, in.StoreService, in.AccountKeeper, in.BankKeeper, in.StakingKeeper, authority.String())
	m := NewAppModule(in.Codec, k, in.AccountKeeper, in.BankKeeper)

	return ModuleOutputs{
		Keeper: k,
		Module: m,
	}
}

// ____________________________________________________________________________

// AppModuleSimulation functions

// GenerateGenesisState creates a randomized GenState of the protocolpool module.
func (AppModule) GenerateGenesisState(simState *module.SimulationState) {
}

// RegisterStoreDecoder registers a decoder for protocolpool module's types
func (am AppModule) RegisterStoreDecoder(sdr simtypes.StoreDecoderRegistry) {
}

// ProposalMsgs returns all the protocolpool msgs used to simulate governance proposals.
func (AppModule) ProposalMsgs(simState module.SimulationState) []simtypes.WeightedProposalMsg {
	return simulation.ProposalMsgs()
}

// WeightedOperations returns the all the protocolpool module operations with their respective weights.
func (am AppModule) WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
	return simulation.WeightedOperations(
		simState.AppParams, simState.Cdc, simState.TxConfig,
		am.accountKeeper, am.bankKeeper, am.keeper,
	)
}