#!/usr/bin/env sh

. /var/lib/inet2/inet2.sh

runscripts() {
  if [ -n "$(getval "interface $2" "$1")" ]; then
    step "Running $1 for $2"
    getval "interface $2" "$1" | while read -r line; do
      (eval "$line")
    done
  fi
}

start() {
  step "Starting inet2"

  step "Removing old Wireguard interfaces"
  for file in /sys/class/net/*; do # Clear all wireguard interfaces
    type=$(cat "$file/type")
    if [ "$type" = "65534" ]; then
    ifname="$(basename $file)"
      run ip link del "$ifname"
    fi
  done

  rm -fr /run/inet2/wg 2> /dev/null
  mkdir -p /run/inet2/wg

  /usr/local/bin/mkbirdconfig.sh

  step "Setting loopback addresses"
  getval Loopback | while read -r addr; do
    run ip addr add "$addr" dev lo
  done
  
  getval interface | while read -r inter; do
    step "Generating config for $inter"
    run /usr/local/bin/mkwgconfig.sh "$inter" /run/inet2/wg/"$inter"
    
    # create the wireguard interface *in the default namespace*
    step "Adding Wireguard interface $inter"
    run ip link add name "$inter" type wireguard
    
    # set up the new network from the config
    step "Setting Wireguard config for $inter"
    run wg setconf "$inter" /run/inet2/wg/"$inter"
    
    # the config doesn't actually add any addresses, do that here
    step "Adding host addresses for $inter"
    getval "interface $inter" Address | while read -r addr; do
      run ip addr add "$addr" dev "$inter"
    done
    
    runscripts PreUp "$inter"
    
    step "Bringing interface up"
    run ip link set dev "$inter" up
    
    getval "interface $inter" Route | while read -r line; do
      read -r route via addr2 < <(printf "%s" "$line")
      if [ "$via" = "via" ]; then
        run ip route add "$route" via "$addr2" dev "$inter"
      else
        run ip route add "$route" dev "$inter"
      fi
    done

    runscripts PostUp "$inter"
  done
  step "Done!"
}

stop() {
  step "Stopping inet2"
  step "Removing loopback"
  getval Loopback | while read -r addr; do
    run ip addr del "$addr" dev lo
  done
    
  getval interface | while read -r inter; do
    runscripts PreDown "$inter"
    
    step "Bringing $inter down"
    run ip link del "$inter"
    
    runscripts PostDown "$inter"
  done
}

reload() {
  getval interface | while read -r inter; do
    step "Generating config for $inter"
    run /usr/local/bin/mkwgconfig.sh "$inter" /run/inet2/wg/"$inter" /etc/inet2.conf
    
    step "Setting Wireguard config for $inter"
    run wg setconf "$inter" /run/inet2/wg/"$inter"
  done
}

restart() {
  stop
  start
}

$1