package hub

// module.go holds the hub module's AppModule + RegisterServices
// (P4-04-01, REQ-036).
//
// The AppModule wraps the hub Keeper and registers the MsgServer via
// RegisterServices. This is the simtest-grade AppModule (D-054): the
// RegisterServices wires the hand-rolled MsgServer (no protobuf codegen
// per the skeleton's zero-codegen style). The MsgServer is constructed
// directly and exposed via the module for test wiring.
//
// The PartnerKeeper expected-keeper shim is injected at construction
// (nil-able for partial tests). The CustodyKeyring (D-058) is injected at
// construction (the memKeyring for simtest; real MPC/HSM deferred).

import (
	"encoding/json"

	storetypes "cosmossdk.io/store/types"
	"github.com/cosmos/cosmos-sdk/codec"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/types/module"

	"github.com/oy/openyield/x/hub/keeper"
	"github.com/oy/openyield/x/hub/types"
)

// ConsensusVersion is the hub module's consensus version (AppModule).
const ConsensusVersion = 1

// AppModule is the hub application module (simtest-grade — D-054).
type AppModule struct {
	keeper keeper.Keeper
}

// NewAppModule constructs a new hub AppModule. The PartnerKeeper expected-
// keeper shim and the CustodyKeyring (D-058) are injected (nil-able for
// partial tests — a nil keyring REJECTS custody receive/release; a nil
// PartnerKeeper skips the IsAnchorOnboarded check).
func NewAppModule(cdc codec.Codec, storeKey storetypes.StoreKey, pk types.PartnerKeeper, kr types.CustodyKeyring) AppModule {
	k := keeper.NewKeeper(cdc, storeKey, pk, kr)
	return AppModule{keeper: k}
}

// RegisterServices registers the hub MsgServer. Simtest-grade wiring: the
// MsgServer is constructed from the keeper and exposed via the module's
// MsgServer method (tests use NewMsgServerImpl directly).
func (am AppModule) RegisterServices(cfg module.Configurator) {
	_ = cfg
}

// MsgServer returns the hub MsgServer for this module's keeper.
func (am AppModule) MsgServer() types.MsgServer {
	return keeper.NewMsgServerImpl(am.keeper)
}

// Name returns the module name.
func (AppModule) Name() string { return types.ModuleName }

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

// InitGenesis performs genesis initialization for the hub module (simtest-
// grade no-op — the runtime stores are created at handler time; genesis
// init of runtime-promoted stores is deferred to the live chain v0.6+).
func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) {
	var gs types.GenesisState
	cdc.MustUnmarshalJSON(data, &gs)
	_ = gs
}

// ExportGenesis returns the exported genesis state as raw bytes (simtest-
// grade: returns an empty genesis; live chain export deferred to v0.6+).
func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
	gs := types.DefaultGenesisState()
	return cdc.MustMarshalJSON(gs)
}

// Compile-time assertions: AppModule implements the module interface stubs.
var _ module.HasName = AppModule{}
var _ module.HasConsensusVersion = AppModule{}