package config

import (
	"flag"
	"regexp"

	"github.com/gorilla/securecookie"

	"golang.org/x/oauth2"
)

const (
	PWDHostnameRegex      = "[0-9]{1,3}-[0-9]{1,3}-[0-9]{1,3}-[0-9]{1,3}"
	PortRegex             = "[0-9]{1,5}"
	AliasnameRegex        = "[0-9|a-z|A-Z|-]*"
	AliasSessionRegex     = "[0-9|a-z|A-Z]{8}"
	AliasGroupRegex       = "(" + AliasnameRegex + ")-(" + AliasSessionRegex + ")"
	PWDHostPortGroupRegex = "^.*ip(" + PWDHostnameRegex + ")(?:-?(" + PortRegex + "))?(?:\\..*)?$"
	AliasPortGroupRegex   = "^.*pwd" + AliasGroupRegex + "(?:-?(" + PortRegex + "))?\\..*$"
)

var NameFilter = regexp.MustCompile(PWDHostPortGroupRegex)
var AliasFilter = regexp.MustCompile(AliasPortGroupRegex)

var PortNumber, SessionsFile, PWDContainerName, L2ContainerName, L2Subdomain, HashKey, SSHKeyPath, L2RouterIP, CookieHashKey, CookieBlockKey string
var UseLetsEncrypt, ExternalDindVolume, NoWindows bool
var LetsEncryptCertsDir string
var MaxLoadAvg float64
var ForceTLS bool
var SecureCookie *securecookie.SecureCookie
var AdminToken string

var PlaygroundDomain string

var SegmentId string

// TODO move this to a sync map so it can be updated on demand when the configuration for a playground changes
var Providers = map[string]map[string]*oauth2.Config{}

func ParseFlags() {
	flag.StringVar(&LetsEncryptCertsDir, "letsencrypt-certs-dir", "/certs", "Path where let's encrypt certs will be stored")
	flag.BoolVar(&UseLetsEncrypt, "letsencrypt-enable", false, "Enabled let's encrypt tls certificates")
	flag.BoolVar(&ForceTLS, "tls", false, "Use TLS to connect to docker daemons")
	flag.StringVar(&PortNumber, "port", "3000", "Port number")
	flag.StringVar(&SessionsFile, "save", "./pwd/sessions", "Tell where to store sessions file")
	flag.StringVar(&PWDContainerName, "name", "pwd", "Container name used to run PWD (used to be able to connect it to the networks it creates)")
	flag.StringVar(&L2ContainerName, "l2", "l2", "Container name used to run L2 Router")
	flag.StringVar(&L2RouterIP, "l2-ip", "", "Host IP address for L2 router ping response")
	flag.StringVar(&L2Subdomain, "l2-subdomain", "direct", "Subdomain to the L2 Router")
	flag.StringVar(&HashKey, "hash_key", "salmonrosado", "Hash key to use for cookies")
	flag.BoolVar(&NoWindows, "win-disable", false, "Disable windows instances")
	flag.BoolVar(&ExternalDindVolume, "dind-external-volume", false, "Use external dind volume though XFS volume driver")
	flag.Float64Var(&MaxLoadAvg, "maxload", 100, "Maximum allowed load average before failing ping requests")
	flag.StringVar(&SSHKeyPath, "ssh_key_path", "", "SSH Private Key to use")
	flag.StringVar(&CookieHashKey, "cookie-hash-key", "", "Hash key to use to validate cookies")
	flag.StringVar(&CookieBlockKey, "cookie-block-key", "", "Block key to use to encrypt cookies")

	flag.StringVar(&PlaygroundDomain, "playground-domain", "localhost", "Domain to use for the playground")
	flag.StringVar(&AdminToken, "admin-token", "", "Token to validate admin user for admin endpoints")

	flag.StringVar(&SegmentId, "segment-id", "", "Segment id to post metrics")

	flag.Parse()

	SecureCookie = securecookie.New([]byte(CookieHashKey), []byte(CookieBlockKey))

}