package server

import (
	"errors"
	"time"
)

var (
	// ErrInvalidIP says that an IP address is malformed. The IP lookup returns
	// it.
	ErrInvalidIP = errors.New("invalid IP address")
	// ErrNoRoute says that the routing table has no route for an address, a
	// prefix or an AS. The lookups return it.
	ErrNoRoute = errors.New("no route found")
)

// LiveRoute represents a route in the live routing table. JSON leaves out an
// empty AS path, next hop or time: the routing table in memory keeps them only
// for the two newest routes of each prefix and origin AS.
//
//nolint:tagliatelle // field names are the existing JSON API
type LiveRoute struct {
	Prefix      string    `json:"prefix"`
	MaskLength  int       `json:"mask_length"`
	IPVersion   int       `json:"ip_version"`
	OriginASN   int       `json:"origin_asn"`
	PeerIP      string    `json:"peer_ip"`
	ASPath      []int     `json:"as_path,omitempty"`
	NextHop     string    `json:"next_hop,omitempty"`
	LastUpdated time.Time `json:"last_updated,omitzero"`
}

// PrefixDistribution represents the distribution of prefixes by mask length
//
//nolint:tagliatelle // field names are the existing JSON API
type PrefixDistribution struct {
	MaskLength int `json:"mask_length"`
	Count      int `json:"count"`
}

// IPInfo is what the IP lookup knows about the route of an address and that
// route's origin AS. A field is nil, null in JSON, when its value is not known.
// Every field is nil for an address with no route.
//
//nolint:tagliatelle // field names are the existing JSON API
type IPInfo struct {
	// Netblock is the most specific prefix that holds the address.
	Netblock   *string `json:"netblock"`
	MaskLength *int    `json:"mask_length"`
	IPVersion  *int    `json:"ip_version"`
	NumPeers   *int    `json:"num_peers"`
	// ASN is the origin AS that the most peers carry the netblock with.
	ASN *int `json:"asn"`
	// NumOrigins and OriginASNs are how many origin ASes peers carry the
	// netblock with, and which, in AS number order.
	NumOrigins *int  `json:"num_origins"`
	OriginASNs []int `json:"origin_asns"`
	// The details the database holds about the AS in ASN.
	ASName      *string `json:"as_name"`
	Handle      *string `json:"handle"`
	Description *string `json:"description"`
	OrgName     *string `json:"org_name"`
	OrgID       *string `json:"org_id"`
	Address     *string `json:"address"`
	CountryCode *string `json:"country_code"`
	AbuseEmail  *string `json:"abuse_email"`
	RIR         *string `json:"rir"`
	// FirstSeen is when RouteWatch first saw the netblock. LastSeen is the
	// time of the netblock's newest kept route.
	FirstSeen *time.Time `json:"first_seen"`
	LastSeen  *time.Time `json:"last_seen"`
	// Indicates if WHOIS data needs refresh (not serialized)
	NeedsWHOISRefresh bool `json:"-"`
}