package org.pacien.tincapp.data

import org.apache.commons.configuration2.Configuration
import org.apache.commons.configuration2.FileBasedConfiguration
import org.apache.commons.configuration2.PropertiesConfiguration
import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder
import org.apache.commons.configuration2.builder.fluent.Configurations
import org.apache.commons.configuration2.builder.fluent.Parameters
import org.pacien.tincapp.extensions.ApacheConfiguration.getCidrList
import org.pacien.tincapp.extensions.ApacheConfiguration.getIntList
import org.pacien.tincapp.extensions.ApacheConfiguration.getStringList
import org.pacien.tincapp.extensions.Java.applyIgnoringException
import java.io.File

/**
 * @author pacien
 */
data class VpnInterfaceConfiguration(val addresses: List<CidrAddress> = emptyList(),
                                     val routes: List<CidrAddress> = emptyList(),
                                     val dnsServers: List<String> = emptyList(),
                                     val searchDomains: List<String> = emptyList(),
                                     val allowedApplications: List<String> = emptyList(),
                                     val disallowedApplications: List<String> = emptyList(),
                                     val allowedFamilies: List<Int> = emptyList(),
                                     val allowBypass: Boolean = false,
                                     val blocking: Boolean = false,
                                     val mtu: Int? = null) {

    companion object {

        private val KEY_ADDRESSES = "Address"
        private val KEY_ROUTES = "Route"
        private val KEY_DNS_SERVERS = "DNSServer"
        private val KEY_SEARCH_DOMAINS = "SearchDomain"
        private val KEY_ALLOWED_APPLICATIONS = "AllowApplication"
        private val KEY_DISALLOWED_APPLICATIONS = "DisallowApplication"
        private val KEY_ALLOWED_FAMILIES = "AllowFamily"
        private val KEY_ALLOW_BYPASS = "AllowBypass"
        private val KEY_BLOCKING = "Blocking"
        private val KEY_MTU = "MTU"

        private val INVITATION_KEY_ADDRESSES = "Ifconfig"
        private val INVITATION_KEY_ROUTES = "Route"

        fun fromIfaceConfiguration(f: File) = fromIfaceConfiguration(Configurations().properties(f))
        fun fromIfaceConfiguration(c: Configuration) = VpnInterfaceConfiguration(
                c.getCidrList(KEY_ADDRESSES),
                c.getCidrList(KEY_ROUTES),
                c.getStringList(KEY_DNS_SERVERS),
                c.getStringList(KEY_SEARCH_DOMAINS),
                c.getStringList(KEY_ALLOWED_APPLICATIONS),
                c.getStringList(KEY_DISALLOWED_APPLICATIONS),
                c.getIntList(KEY_ALLOWED_FAMILIES),
                c.getBoolean(KEY_ALLOW_BYPASS, false),
                c.getBoolean(KEY_BLOCKING, false),
                c.getInteger(KEY_MTU, null))

        fun fromInvitation(f: File) = fromInvitation(Configurations().properties(f))
        fun fromInvitation(c: Configuration) = VpnInterfaceConfiguration(
                c.getStringList(INVITATION_KEY_ADDRESSES)
                        .map { applyIgnoringException(CidrAddress.Companion::fromSlashSeparated, it) }
                        .filterNotNull(),
                c.getStringList(INVITATION_KEY_ROUTES)
                        .map { it.substringBefore(' ') }
                        .map { CidrAddress.fromSlashSeparated(it) })

    }

    fun write(f: File) = FileBasedConfigurationBuilder<FileBasedConfiguration>(PropertiesConfiguration::class.java)
            .configure(Parameters().properties().setFile(f.apply { createNewFile() })).let { builder ->
        builder.configuration.let { cfg ->
            addresses.forEach { cfg.addProperty(KEY_ADDRESSES, it.toSlashSeparated()) }
            routes.forEach { cfg.addProperty(KEY_ROUTES, it.toSlashSeparated()) }
        }
        builder.save()
    }

}