package checker

import (
	"encoding/json"

	"github.com/miekg/dns"
)

const ObservationKey = "reverse-zone"

type ForwardAddress struct {
	Type    string `json:"type"` // "A" or "AAAA"
	Address string `json:"address"`
	TTL     uint32 `json:"ttl,omitempty"`
}

type PTREntry struct {
	OwnerName string `json:"owner_name"` // FQDN of the PTR record (e.g. "42.1.168.192.in-addr.arpa.")
	ReverseIP string `json:"reverse_ip,omitempty"`
	Subdomain string `json:"subdomain,omitempty"`

	Targets []string `json:"targets"`
	TTL     uint32   `json:"ttl,omitempty"`

	TargetSyntaxValid  bool `json:"target_syntax_valid,omitempty"`
	TargetLooksGeneric bool `json:"target_looks_generic,omitempty"`

	ForwardAddresses []ForwardAddress `json:"forward_addresses,omitempty"`
	ForwardMatch     bool             `json:"forward_match,omitempty"`
	TargetResolves   bool             `json:"target_resolves,omitempty"`
	ForwardError     string           `json:"forward_error,omitempty"`
}

type ReverseZoneData struct {
	Zone          string `json:"zone"`
	IsReverseZone bool   `json:"is_reverse_zone"`
	IsIPv6        bool   `json:"is_ipv6"`

	PTRCount  int        `json:"ptr_count"`
	Entries   []PTREntry `json:"entries,omitempty"` // capped to maxPTRsToCheck
	Truncated bool       `json:"truncated,omitempty"`
	LoadError string     `json:"load_error,omitempty"` // structural failure preventing collection
}

// ptrService mirrors happyDomain's `svcs.PTR`.
type ptrService struct {
	Record *dns.PTR `json:"Record"`
}

// serviceMessage mirrors happyDomain's per-service envelope inside a Zone.
type serviceMessage struct {
	Type    string          `json:"_svctype"`
	Service json.RawMessage `json:"Service"`
}

// zoneMessage mirrors the subset of happyDomain's Zone needed here.
type zoneMessage struct {
	DefaultTTL uint32                      `json:"default_ttl"`
	Services   map[string][]serviceMessage `json:"services"`
}