package org.pacien.tincapp.extensions

import android.net.VpnService
import org.pacien.tincapp.data.CidrAddress
import org.pacien.tincapp.data.VpnInterfaceConfiguration
import org.pacien.tincapp.extensions.Java.applyIgnoringException

/**
 * @author pacien
 */
object VpnServiceBuilder {

    fun VpnService.Builder.addAddress(cidr: CidrAddress): VpnService.Builder = addAddress(cidr.address, cidr.prefix)
    fun VpnService.Builder.addRoute(cidr: CidrAddress): VpnService.Builder = addRoute(cidr.address, cidr.prefix)
    fun VpnService.Builder.allowBypass(allow: Boolean): VpnService.Builder = if (allow) allowBypass() else this
    fun VpnService.Builder.overrideMtu(mtu: Int?): VpnService.Builder = if (mtu != null) setMtu(mtu) else this

    fun VpnService.Builder.addAddresses(cidrList: List<CidrAddress>): VpnService.Builder =
            cidrList.fold(this, { net, cidr -> net.addAddress(cidr) })

    fun VpnService.Builder.addRoutes(cidrList: List<CidrAddress>): VpnService.Builder =
            cidrList.fold(this, { net, cidr -> net.addRoute(cidr) })

    fun VpnService.Builder.addDnsServers(dnsList: List<String>): VpnService.Builder =
            dnsList.fold(this, { net, dns -> net.addDnsServer(dns) })

    fun VpnService.Builder.addSearchDomains(domainList: List<String>): VpnService.Builder =
            domainList.fold(this, { net, domain -> net.addSearchDomain(domain) })

    fun VpnService.Builder.allowFamilies(familyList: List<Int>): VpnService.Builder =
            familyList.fold(this, { net, family -> net.allowFamily(family) })

    fun VpnService.Builder.addAllowedApplications(apps: List<String>): VpnService.Builder =
            apps.fold(this, { net, app -> applyIgnoringException(net::addAllowedApplication, app, net)!! })

    fun VpnService.Builder.addDisallowedApplications(apps: List<String>): VpnService.Builder =
            apps.fold(this, { net, app -> applyIgnoringException(net::addDisallowedApplication, app, net)!! })

    fun VpnService.Builder.applyCfg(cfg: VpnInterfaceConfiguration): VpnService.Builder = this
            .addAddresses(cfg.addresses)
            .addRoutes(cfg.routes)
            .addDnsServers(cfg.dnsServers)
            .addSearchDomains(cfg.searchDomains)
            .addAllowedApplications(cfg.allowedApplications)
            .addDisallowedApplications(cfg.disallowedApplications)
            .allowFamilies(cfg.allowedFamilies)
            .allowBypass(cfg.allowBypass)
            .setBlocking(cfg.blocking)
            .overrideMtu(cfg.mtu)

}