package services

// module.go holds the services module's AppModule + RegisterServices
// (P5-02-01, REQ-037).
//
// The AppModule wraps the services 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 WindowKeeper and VaultKeeper expected-keeper shims are injected
// at construction (nil-able for partial tests). The WindowKeeper shim
// is the A-552 window-grant-on-every-op authority boundary; the
// VaultKeeper shim is the A-553 VaultService provisioning boundary.

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

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

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

// NewAppModule constructs a new services AppModule. The WindowKeeper
// and VaultKeeper expected-keeper shims are injected (nil-able for
// partial tests). The WindowKeeper shim is the A-552 window-grant-on-
// every-op authority boundary; the VaultKeeper shim is the A-553
// VaultService provisioning boundary.
func NewAppModule(cdc codec.Codec, storeKey storetypes.StoreKey, wk types.WindowKeeper, vk types.VaultKeeper) AppModule {
	k := keeper.NewKeeper(cdc, storeKey, wk, vk)
	return AppModule{keeper: k}
}

// RegisterServices registers the services 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 services 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 services 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{}