package asaModels

import (
	"errors"
	"net"
)

type PacketTracerTCP struct {
	Input      string `json:"input"`
	SourceIP   string `json:"src-ip"`
	SourcePort int    `json:"src-port" binding:"required"`
	DestIP     string `json:"dest-ip"`
	DestPort   int    `json:"dest-port" binding:"required"`
	Detailed   bool   `json:"detailed"`
	XML        bool   `json:"XML"`
}

func addE(e *string, s string) {
	if *e != "" {
		*e = *e + "\n"
	}
	*e = *e + s
}

func (p *PacketTracerTCP) Valid() error {
	e := new(string)

	if p.Input == "" {
		*e = "input field is required; defines input interface for packet-tracer"
	}

	sip := net.ParseIP(p.SourceIP)
	if sip == nil {
		addE(e, "src-ip field is not a valid IP address")
	}

	if p.SourcePort < 0 || p.SourcePort > 65535 {
		addE(e, "src-port  must be >= 0 && < 65535")
	}

	dip := net.ParseIP(p.DestIP)
	if dip == nil {
		addE(e, "dest-ip field is not a valid IP address")
	}

	if p.DestPort < 0 || p.DestPort > 65535 {
		addE(e, "dest-port must be >= 0 && < 65535")
	}

	if *e != "" {
		return errors.New(*e)
	}
	return nil
}