package keeper

import (
	"fmt"

	sdk "github.com/cosmos/cosmos-sdk/types"

	types "git.vdb.to/cerc-io/laconicd/x/bond"
)

// RegisterInvariants registers all bond invariants
func RegisterInvariants(ir sdk.InvariantRegistry, k *Keeper) {
	ir.RegisterRoute(types.ModuleName, "module-account", ModuleAccountInvariant(k))
}

// AllInvariants runs all invariants of the bond module.
func AllInvariants(k *Keeper) sdk.Invariant {
	return func(ctx sdk.Context) (string, bool) {
		return ModuleAccountInvariant(k)(ctx)
	}
}

// ModuleAccountInvariant checks that the 'bond' module account balance is non-negative.
func ModuleAccountInvariant(k *Keeper) sdk.Invariant {
	return func(ctx sdk.Context) (string, bool) {
		moduleAddress := k.accountKeeper.GetModuleAddress(types.ModuleName)
		if k.bankKeeper.GetAllBalances(ctx, moduleAddress).IsAnyNegative() {
			return sdk.FormatInvariant(
				types.ModuleName,
				"module-account",
				fmt.Sprintf("Module account '%s' has negative balance.", types.ModuleName),
			), true
		}

		return "", false
	}
}