package cover

// module.go holds the cover module's AppModule + RegisterServices (REQ-046,
// D-054 simtest-grade).
//
// The AppModule wraps the cover 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 four expected-keeper shims (StandingKeeper, WatcherKeeper,
// BondKeeper, StillKeeper) are injected at construction (all nil-able for
// partial tests — a nil StandingKeeper skips the D-077 gate; a nil
// WatcherKeeper skips the launch attestation; a nil StillKeeper skips the
// auto-Still recording; a nil BondKeeper is the P1 default).

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

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

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

// NewAppModule constructs a new cover AppModule. The four expected-keeper
// shims are injected (all nil-able for partial tests).
func NewAppModule(cdc codec.Codec, storeKey storetypes.StoreKey, sk types.StandingKeeper, wk types.WatcherKeeper, bk types.BondKeeper, stK types.StillKeeper) AppModule {
	k := keeper.NewKeeper(cdc, storeKey, sk, wk, bk, stK)
	return AppModule{keeper: k}
}

// RegisterServices registers the cover 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 cover 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 cover 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
// v0.8+).
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 v0.8+).
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{}