text: /*******************************************************************************
   *                                                                             *
   *  Copyright (C) 2017 by Max Lv <max.c.lv@gmail.com>                          *
   *  Copyright (C) 2017 by Mygod Studio <contact-shadowsocks-android@mygod.be>  *
   *                                                                             *
   *  This program is free software: you can redistribute it and/or modify       *
   *  it under the terms of the GNU General Public License as published by       *
   *  the Free Software Foundation, either version 3 of the License, or          *
   *  (at your option) any later version.                                        *
   *                                                                             *
   *  This program is distributed in the hope that it will be useful,            *
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of             *
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
   *  GNU General Public License for more details.                               *
   *                                                                             *
   *  You should have received a copy of the GNU General Public License          *
   *  along with this program. If not, see <http://www.gnu.org/licenses/>.       *
   *                                                                             *
   *******************************************************************************/
  
  package com.github.shadowsocks.plugin
  
  import com.github.shadowsocks.utils.Commandline
  import timber.log.Timber
  import java.util.*
  
  class PluginConfiguration(val pluginsOptions: Map<String, PluginOptions>, val selected: String) {
      private constructor(plugins: List<PluginOptions>) : this(
              plugins.filter { it.id.isNotEmpty() }.associateBy { it.id },
              if (plugins.isEmpty()) "" else plugins[0].id)
      constructor(plugin: String) : this(plugin.split('\n').map { line ->
          if (line.startsWith("kcptun ")) {
              val opt = PluginOptions()
              opt.id = "kcptun"
              try {
                  val iterator = Commandline.translateCommandline(line).drop(1).iterator()
                  while (iterator.hasNext()) {
                      val option = iterator.next()
                      when {
                          option == "--nocomp" -> opt["nocomp"] = null
                          option.startsWith("--") -> opt[option.substring(2)] = iterator.next()
                          else -> throw IllegalArgumentException("Unknown kcptun parameter: $option")
                      }
                  }
              } catch (exc: Exception) {
                  Timber.w(exc)
              }
              opt
          } else PluginOptions(line)
      })
  
      fun getOptions(
              id: String = selected,
              defaultConfig: () -> String? = { PluginManager.fetchPlugins().lookup[id]?.defaultConfig }
      ) = if (id.isEmpty()) PluginOptions() else pluginsOptions[id] ?: PluginOptions(id, defaultConfig())
  
      override fun toString(): String {
          val result = LinkedList<PluginOptions>()
          for ((id, opt) in pluginsOptions) if (id == this.selected) result.addFirst(opt) else result.addLast(opt)
          if (!pluginsOptions.contains(selected)) result.addFirst(getOptions())
          return result.joinToString("\n") { it.toString(false) }
      }
  }
  