package ledger

import (
	"errors"
	"time"
)

type OperatingMode string

const (
	ModeNormal                OperatingMode = "NORMAL"
	ModeGLOnly                OperatingMode = "GL_ONLY"
	InternalExecutionMetadata               = "gl_execution"
)

var (
	ErrModeConflict       = errors.New("operating mode revision changed")
	ErrModeRequired       = errors.New("operation is not permitted in the current ledger mode")
	ErrInsufficientFunds  = errors.New("insufficient ledger funds")
	ErrSettlementInFlight = errors.New("settlement is in flight; drain the worker before switching")
	ErrConcurrentPosting  = errors.New("concurrent posting conflicted; retry with the same idempotency key")
)

type OperatingState struct {
	Mode      OperatingMode
	Revision  int64
	ActorID   string
	Reason    string
	ChangedAt time.Time
}

type UserAssetBalance struct {
	AssetID   int64
	Available Amount
	Frozen    Amount
}