package pia

import (
	"net"

	"github.com/qdm12/golibs/crypto/random"
	"github.com/qdm12/golibs/files"
	"github.com/qdm12/golibs/logging"
	"github.com/qdm12/golibs/network"
	"github.com/qdm12/golibs/verification"
	"github.com/qdm12/private-internet-access-docker/internal/firewall"
	"github.com/qdm12/private-internet-access-docker/internal/models"
)

const logPrefix = "PIA configurator"

// Configurator contains methods to download, read and modify the openvpn configuration to connect as a client
type Configurator interface {
	GetOpenVPNConnections(region models.PIARegion, protocol models.NetworkProtocol,
		encryption models.PIAEncryption, targetIP net.IP) (connections []models.OpenVPNConnection, err error)
	BuildConf(connections []models.OpenVPNConnection, encryption models.PIAEncryption, verbosity, uid, gid int, root bool) (err error)
	GetPortForward() (port uint16, err error)
	WritePortForward(filepath models.Filepath, port uint16) (err error)
	AllowPortForwardFirewall(device models.VPNDevice, port uint16) (err error)
}

type configurator struct {
	client      network.Client
	fileManager files.FileManager
	firewall    firewall.Configurator
	logger      logging.Logger
	random      random.Random
	verifyPort  func(port string) error
	lookupIP    func(host string) ([]net.IP, error)
}

// NewConfigurator returns a new Configurator object
func NewConfigurator(client network.Client, fileManager files.FileManager, firewall firewall.Configurator, logger logging.Logger) Configurator {
	return &configurator{client, fileManager, firewall, logger, random.NewRandom(), verification.NewVerifier().VerifyPort, net.LookupIP}
}