package netmap

import (
	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
)

// Operation is an enumeration of v2-compatible filtering operations.
type Operation uint32

const (
	_ Operation = iota

	// OpEQ is an "Equal" operation.
	OpEQ

	// OpNE is a "Not equal" operation.
	OpNE

	// OpGT is a "Greater than" operation.
	OpGT

	// OpGE is a "Greater than or equal to" operation.
	OpGE

	// OpLT is a "Less than" operation.
	OpLT

	// OpLE is a "Less than or equal to" operation.
	OpLE

	// OpOR is an "OR" operation.
	OpOR

	// OpAND is an "AND" operation.
	OpAND
)

// OperationFromV2 converts v2 Operation to Operation.
func OperationFromV2(op netmap.Operation) Operation {
	switch op {
	default:
		return 0
	case netmap.OR:
		return OpOR
	case netmap.AND:
		return OpAND
	case netmap.GE:
		return OpGE
	case netmap.GT:
		return OpGT
	case netmap.LE:
		return OpLE
	case netmap.LT:
		return OpLT
	case netmap.EQ:
		return OpEQ
	case netmap.NE:
		return OpNE
	}
}

// ToV2 converts Operation to v2 Operation.
func (op Operation) ToV2() netmap.Operation {
	switch op {
	default:
		return netmap.UnspecifiedOperation
	case OpOR:
		return netmap.OR
	case OpAND:
		return netmap.AND
	case OpGE:
		return netmap.GE
	case OpGT:
		return netmap.GT
	case OpLE:
		return netmap.LE
	case OpLT:
		return netmap.LT
	case OpEQ:
		return netmap.EQ
	case OpNE:
		return netmap.NE
	}
}

func (op Operation) String() string {
	switch op {
	default:
		return "UNSPECIFIED"
	case OpNE:
		return "NE"
	case OpEQ:
		return "EQ"
	case OpLT:
		return "LT"
	case OpLE:
		return "LE"
	case OpGT:
		return "GT"
	case OpGE:
		return "GE"
	case OpAND:
		return "AND"
	case OpOR:
		return "OR"
	}
}