package protocol

// 协议常量与默认上限（与 DEVELOPMENT 第 6、11 节示例一致）。

const (
	Version = 1

	TypeHello             = "hello"
	TypeResp              = "resp"
	TypeSend              = "send"
	TypeMsg               = "msg"
	TypeAck               = "ack"
	TypeRecall            = "recall"
	TypeStatus            = "status"
	TypeReceipt           = "receipt"
	TypeReceiptAck        = "receipt_ack"
	TypeRevoked           = "revoked"
	TypePresenceGet       = "presence.get"
	TypeDirectoryList     = "directory.list"
	TypePresenceWatch     = "presence.watch"
	TypePresence          = "presence"
	TypeUnlock            = "unlock"
	TypeSelfGet           = "self.get"
	TypeSelfUpdate        = "self.update"
	TypeSelfTalkPassword  = "self.talk_password"
	TypeSelfLoginPassword = "self.login_password"
	TypeSelfLogout        = "self.logout"
	TypeGroupCreate       = "group.create"
	TypeGroupAdd          = "group.add"
	TypeGroupRemove       = "group.remove"
	TypeGroupLeave        = "group.leave"
	TypeGroupTransfer     = "group.transfer"
	TypeGroupRename       = "group.rename"
	TypeGroupDissolve     = "group.dissolve"
	TypeGroupList         = "group.list"
	TypeGroupGet          = "group.get"
	TypeGroupEvent        = "group_event"
	TypeFatal             = "fatal"

	TargetEndpoint = "endpoint"
	TargetGroup    = "group"

	EncUTF8   = "utf8"
	EncBase64 = "base64"

	DefaultContentTypeUTF8   = "text/plain; charset=utf-8"
	DefaultContentTypeBase64 = "application/octet-stream"

	SessionTokenPrefix = "nst_"

	MinIDLen             = 1
	MaxIDLen             = 64
	MaxContentTypeLen    = 128
	MaxNameChars         = 64
	MinLoginPasswordLen  = 8
	MaxLoginPasswordLen  = 128
	MinTalkPasswordLen   = 4
	MaxTalkPasswordLen   = 64
	MinMaxReceiveBytes   = 1024
	MaxPresenceGetIDs    = 200
	MaxPresenceWatchIDs  = 1000
	MaxPageLimit         = 200
	DefaultOfflineTTL    = int64(86400)
	DefaultMaxBodyBytes  = 262144
	DefaultMaxMetaBytes  = 4096
	DefaultMaxFrameBytes = 786432
)

// 第 6.10 节错误码。
const (
	CodeBadRequest              = "bad_request"
	CodeNotReady                = "not_ready"
	CodeUnauthorized            = "unauthorized"
	CodeForbidden               = "forbidden"
	CodeNotFound                = "not_found"
	CodeInvalidTarget           = "invalid_target"
	CodeConflict                = "conflict"
	CodeIDTaken                 = "id_taken"
	CodeBodyTooLarge            = "body_too_large"
	CodeMetaTooLarge            = "meta_too_large"
	CodeFrameTooLarge           = "frame_too_large"
	CodeResponseTooLarge        = "response_too_large"
	CodeTalkPasswordRequired    = "talk_password_required"
	CodeTalkPasswordInvalid     = "talk_password_invalid"
	CodeRateLimited             = "rate_limited"
	CodeNotMember               = "not_member"
	CodeOwnerCannotLeave        = "owner_cannot_leave"
	CodeGroupFull               = "group_full"
	CodeQuotaExceeded           = "quota_exceeded"
	CodeEndpointDisabled        = "endpoint_disabled"
	CodeRegistrationClosed      = "registration_closed"
	CodeRegistrationCodeInvalid = "registration_code_invalid"
	CodeBusy                    = "busy"
)