#!/bin/bash -eu

# Change the value on the right side of the equal sign to the name of the server hosting the archive.
ARCHIVE_HOST_NAME=archiveserver
LOGFILE=/tmp/archiveloop.log

function log () {
  echo "$( date )" >> "$LOGFILE"
  echo "$1" >> "$LOGFILE"
}

function archive_is_reachable () {
  local reachable=true
  ping -q -w 1 -c 1 "$ARCHIVE_HOST_NAME" > /dev/null 2>&1 || reachable=false
  if [ "$reachable" = false ]
  then
    false
    return
  fi
  true
}

function connect_usb_drives_to_host() {
  log "Connecting usb to host..."
  modprobe g_mass_storage
  log "Connected usb to host."
}

function wait_for_archive_to_be_reachable () {
  log "Waiting for archive to be reachable..."
  while [ true ]
  do
    if archive_is_reachable
    then
      log "Archive is reachable."
      break
    fi
    sleep 1
  done
}

function archive_clips () {
  log "Archiving..."
  /root/bin/archive-teslacam-clips
  log "Finished archiving."
}

function wait_for_archive_to_be_unreachable () {
  log "Waiting for archive to be unreachable..."
  while [ true ]
    do
      if ! archive_is_reachable
      then
        log "Archive is unreachable."
        break
      fi
      sleep 1
  done
}

export -f connect_usb_drives_to_host

log "Starting..."

if archive_is_reachable
then
  archive_clips

  wait_for_archive_to_be_unreachable
else
  connect_usb_drives_to_host
fi

while [ true ]
do
  wait_for_archive_to_be_reachable

  archive_clips

  wait_for_archive_to_be_unreachable
done