/*
 * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
 * Copyright (C) 2017-2018 Pacien TRAN-GIRARD
 *
 * 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 <https://www.gnu.org/licenses/>.
 */

package org.pacien.tincapp.context

import org.slf4j.Logger

/**
 * @author pacien
 */
class CrashRecorder(private val logger: Logger,
                    private val upstreamCrashHandler: Thread.UncaughtExceptionHandler) : Thread.UncaughtExceptionHandler {

  companion object {
    private val flagFile = AppPaths.crashFlagFile()

    fun hasPreviouslyCrashed() = flagFile.exists()

    fun flagCrash() {
      flagFile.apply { if (!exists()) createNewFile() }
    }

    fun dismissPreviousCrash() {
      flagFile.delete()
    }
  }

  override fun uncaughtException(thread: Thread, throwable: Throwable) {
    logger.error("Fatal application error.", throwable)
    flagCrash()
    upstreamCrashHandler.uncaughtException(thread, throwable)
  }
}