package bond

// module.go holds the bond module's AppModule + RegisterServices
// (P6-02-01, REQ-038).
//
// The AppModule wraps the bond 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 StandKeeper expected-keeper shim is injected at construction
// (nil-able for partial tests — a nil StandKeeper skips the StandExists
// check on issuance).

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

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

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

// NewAppModule constructs a new bond AppModule. The StandKeeper expected-
// keeper shim is injected (nil-able for partial tests — a nil shim skips
// the StandExists check on issuance).
func NewAppModule(cdc codec.Codec, storeKey storetypes.StoreKey, sk types.StandKeeper) AppModule {
	k := keeper.NewKeeper(cdc, storeKey, sk)
	return AppModule{keeper: k}
}

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

// Keeper returns the underlying keeper (for test wiring of the
// StandKeeper shim post-construction).
func (am AppModule) Keeper() keeper.Keeper { return 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 bond 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+).
// Uses encoding/json directly (the bond GenesisState is the v0.2/v0.3
// JSON-shaped struct; it does not implement proto.Message, so the codec
// JSONCodec is not used — matching types.ValidateGenesis which uses
// encoding/json).
func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, data json.RawMessage) {
	var gs types.GenesisState
	_ = json.Unmarshal(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()
	bz, _ := json.Marshal(gs)
	return bz
}

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