// SPDX-License-Identifier: BSD-3-Clause

package query

import (
	"errors"
)

// Message is for overall DNS responses.
//
//nolint:govet,tagliatelle // Better looking output is worth a few bytes.
type Message struct {
	DateString  string `json:"dateString,omitempty" xml:"dateString,omitempty" yaml:"dateString,omitempty"`
	DateSeconds string `json:"dateSeconds,omitempty" xml:"dateSeconds,omitempty" yaml:"dateSeconds,omitempty"`
	MsgSize     int    `json:"msgLength,omitempty" xml:"msgSize,omitempty" yaml:"msgSize,omitempty"`
	ID          uint16 `json:"id," xml:"id," yaml:"id" example:"12"`

	Opcode             string `json:"opcode," xml:"opcode," yaml:"opcode" example:"QUERY"`
	Status             string `json:"status," xml:"status," yaml:"status" example:"NOERR"`
	Response           bool   `json:"response," xml:"response," yaml:"response" example:"true"`
	Authoritative      bool   `json:"authoritative," xml:"authoritative," yaml:"authoritative" example:"false"`
	Truncated          bool   `json:"truncated," xml:"truncated," yaml:"truncated" example:"false"`
	RecursionDesired   bool   `json:"RD," xml:"recursionDesired," yaml:"recursionDesired" example:"true"`
	RecursionAvailable bool   `json:"RA," xml:"recursionAvailable," yaml:"recursionAvailable" example:"true"`
	Zero               bool   `json:"zero," xml:"zero," yaml:"zero" example:"false"`
	AuthenticatedData  bool   `json:"authenticatedData," xml:"authenticatedData," yaml:"authenticatedData" example:"false"`
	CheckingDisabled   bool   `json:"checkingDisabled," xml:"checkingDisabled," yaml:"checkingDisabled" example:"false"`
	Name               string `json:"QNAME,omitempty" xml:"QNAME,omitempty" yaml:"QNAME,omitempty" example:"localhost"`
	Type               uint16 `json:"QTYPE,omitempty" xml:"QTYPE,omitempty" yaml:"QTYPE,omitempty" example:"IN"`
	TypeName           string `json:"QTYPEname,omitempty" xml:"QTYPEname,omitempty" yaml:"QTYPEname,omitempty" example:"IN"`
	Class              string `json:"QCLASS,omitempty" xml:"QCLASS,omitempty" yaml:"QCLASS,omitempty" example:"A"`
	ClassName          string `json:"QCLASSname,omitempty" xml:"QCLASSname,omitempty" yaml:"QCLASSname,omitempty" example:"1"`
	RTT                string `json:"queryTime,omitempty" xml:"queryTime,omitempty" yaml:"queryTime,omitempty"`
	Server             string `json:"server,omitempty" xml:"server,omitempty" yaml:"server,omitempty"`
	When               string `json:"when,omitempty" xml:"when,omitempty" yaml:"when,omitempty"`

	Opt []Opts `json:"opt,omitempty" xml:"opt,omitempty" yaml:"opt,omitempty"`
	// Question Section
	Question []Question `json:"question,omitempty" xml:"question,omitempty" yaml:"question,omitempty"`

	// Answer Section
	AnswerRRs        []Answer `json:"answersRRs,omitempty" xml:"answersRRs,omitempty" yaml:"answersRRs,omitempty" example:"false"`
	AuthoritativeRRs []Answer `json:"authorityRRs,omitempty" xml:"authorityRRs,omitempty" yaml:"authorityRRs,omitempty" example:"false"`
	AdditionalRRs    []Answer `json:"additionalRRs,omitempty" xml:"additionalRRs,omitempty" yaml:"additionalRRs,omitempty" example:"false"`
}

// Question is a DNS Query.
//
//nolint:govet,tagliatelle
type Question struct {
	Name      string `json:"name,omitempty" xml:"name,omitempty" yaml:"name,omitempty" example:"localhost"`
	Type      uint16 `json:"type,omitempty" xml:"type,omitempty" yaml:"type,omitempty" example:"IN"`
	TypeName  string `json:"TYPEname,omitempty" xml:"TYPEname,omitempty" yaml:"TYPEname,omitempty" example:"IN"`
	Class     string `json:"class,omitempty" xml:"class,omitempty" yaml:"class,omitempty" example:"A"`
	ClassName string `json:"CLASSname,omitempty" xml:"CLASSname,omitempty" yaml:"CLASSname,omitempty" example:"1"`
}

// Answer is for DNS Resource Headers.
//
//nolint:govet,tagliatelle
type Answer struct {
	Name      string `json:"name,omitempty" xml:"name,omitempty" yaml:"name,omitempty" example:"127.0.0.1"`
	Type      uint16 `json:"type,omitempty" xml:"type,omitempty" yaml:"type,omitempty" example:"IN"`
	TypeName  string `json:"TYPEname,omitempty" xml:"TYPEname,omitempty" yaml:"TYPEname,omitempty" example:"IN"`
	Class     uint16 `json:"class,omitempty" xml:"class,omitempty" yaml:"class,omitempty" example:"A"`
	ClassName string `json:"CLASSname,omitempty" xml:"CLASSname,omitempty" yaml:"CLASSname,omitempty" example:"A"`
	TTL       string `json:"ttl,omitempty" xml:"ttl,omitempty" yaml:"ttl,omitempty" example:"0ms"`
	Value     string `json:"response,omitempty" xml:"response,omitempty" yaml:"response,omitempty"`
	Rdlength  uint16 `json:"RDLENGTH,omitempty" xml:"RDLENGTH,omitempty" yaml:"RDLENGTH,omitempty"`
	Rdhex     string `json:"RDATAHEX,omitempty" xml:"RDATAHEX,omitempty" yaml:"RDATAHEX,omitempty"`
}

// Opts is for the OPT pseudosection, nearly exclusively for EDNS.
type Opts struct {
	Name  string `json:"name,omitempty" xml:"name,omitempty" yaml:"name,omitempty"`
	Value string `json:"value" xml:"value" yaml:"value"`
}

var errNoMessage = errors.New("no message")