package claims

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"
	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/module"

	"github.com/evmos/evmos/v10/x/claims/client/cli"
	"github.com/evmos/evmos/v10/x/claims/keeper"
	"github.com/evmos/evmos/v10/x/claims/types"
)

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

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

// AppModuleBasic implements the AppModuleBasic interface for the claim module.
type AppModuleBasic struct {
	cdc codec.Codec
}

func NewAppModuleBasic(cdc codec.Codec) AppModuleBasic {
	return AppModuleBasic{cdc: cdc}
}

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

func (AppModuleBasic) RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
}

// RegisterInterfaces registers the module's interface types
func (AppModuleBasic) RegisterInterfaces(interfaceRegistry cdctypes.InterfaceRegistry) {
	types.RegisterInterfaces(interfaceRegistry)
}

// DefaultGenesis returns the claim module's default genesis state.
func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
	return cdc.MustMarshalJSON(types.DefaultGenesis())
}

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

// RegisterRESTRoutes registers the claim module's REST service handlers.
func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Router) {
}

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

// GetTxCmd returns the claim module's root tx command.
func (AppModuleBasic) GetTxCmd() *cobra.Command { return nil }

// GetQueryCmd returns the claim module's root query command.
func (AppModuleBasic) GetQueryCmd() *cobra.Command {
	return cli.GetQueryCmd()
}

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

// AppModule implements the AppModule interface for the claim module.
type AppModule struct {
	AppModuleBasic
	keeper keeper.Keeper
	// legacySubspace is used solely for migration of x/params managed parameters
	legacySubspace types.Subspace
}

func NewAppModule(cdc codec.Codec, keeper keeper.Keeper, legacySubspace types.Subspace) AppModule {
	return AppModule{
		AppModuleBasic: NewAppModuleBasic(cdc),
		keeper:         keeper,
		legacySubspace: legacySubspace,
	}
}

// Name returns the claim module's name.
func (am AppModule) Name() string {
	return am.AppModuleBasic.Name()
}

// Route returns the claim module's message routing key.
func (am AppModule) Route() sdk.Route {
	return sdk.NewRoute(types.RouterKey, NewHandler(&am.keeper))
}

// QuerierRoute returns the claim module's query routing key.
func (AppModule) QuerierRoute() string { return "" }

// LegacyQuerierHandler returns the claim module's Querier.
func (AppModule) LegacyQuerierHandler(_ *codec.LegacyAmino) sdk.Querier {
	return nil
}

// RegisterServices registers a GRPC query service to respond to the
// module-specific GRPC queries.
func (am AppModule) RegisterServices(cfg module.Configurator) {
	types.RegisterQueryServer(cfg.QueryServer(), am.keeper)
	types.RegisterMsgServer(cfg.MsgServer(), &am.keeper)
	m := keeper.NewMigrator(am.keeper, am.legacySubspace)
	err := cfg.RegisterMigration(types.ModuleName, 2, m.Migrate2to3)
	if err != nil {
		panic(err)
	}
}

// RegisterInvariants registers the claim module's invariants.
func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
	keeper.RegisterInvariants(ir, am.keeper)
}

// InitGenesis performs the claim module's genesis initialization It returns
// no validator updates.
func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, gs json.RawMessage) []abci.ValidatorUpdate {
	var genState types.GenesisState
	// Initialize global index to index in genesis state
	cdc.MustUnmarshalJSON(gs, &genState)

	InitGenesis(ctx, am.keeper, genState)

	return []abci.ValidatorUpdate{}
}

// ExportGenesis returns the claim module's exported genesis state as raw JSON bytes.
func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
	genState := ExportGenesis(ctx, am.keeper)
	return cdc.MustMarshalJSON(genState)
}

// BeginBlock executes all ABCI BeginBlock logic respective to the claim module.
func (AppModule) BeginBlock(_ sdk.Context, _ abci.RequestBeginBlock) {}

// EndBlock executes all ABCI EndBlock logic respective to the claim module. It
// returns no validator updates.
func (am AppModule) EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {
	am.keeper.EndBlocker(ctx)
	return []abci.ValidatorUpdate{}
}

// ConsensusVersion implements AppModule/ConsensusVersion.
func (AppModule) ConsensusVersion() uint64 { return 3 }
