#!/bin/sh

# Copyright (c) 2021-2023 tteck
# Author: tteck (tteckster)
# License: MIT
# https://github.com/tteck/Proxmox/raw/main/LICENSE

if [ "$VERBOSE" = "yes" ]; then set -x; STD=""; else STD="silent"; fi
silent() { "$@" > /dev/null 2>&1; }
if [ "$DISABLEIPV6" == "yes" ]; then 
$STD sysctl net.ipv6.conf.all.disable_ipv6=1
$STD sysctl net.ipv6.conf.default.disable_ipv6=1
echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.d/99-sysctl.conf
echo "net.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.d/99-sysctl.conf
$STD sysctl -p /etc/sysctl.d/99-sysctl.conf 
fi
YW=$(echo "\033[33m")
RD=$(echo "\033[01;31m")
BL=$(echo "\033[36m")
GN=$(echo "\033[1;92m")
CL=$(echo "\033[m")
RETRY_NUM=10
RETRY_EVERY=3
i=$RETRY_NUM
CM="${GN}✓${CL}"
CROSS="${RD}✗${CL}"
BFR="\\r\\033[K"
HOLD="-"
set -Eeuo pipefail
trap 'error_handler $LINENO "$BASH_COMMAND"' ERR
function error_handler() {
  local exit_code="$?"
  local line_number="$1"
  local command="$2"
  local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
  echo -e "\n$error_message\n"
}

function msg_info() {
  local msg="$1"
  echo -ne " ${HOLD} ${YW}${msg}..."
}

function msg_ok() {
  local msg="$1"
  echo -e "${BFR} ${CM} ${GN}${msg}${CL}"
}

function msg_error() {
  local msg="$1"
  echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
}

msg_info "Setting up Container OS "
while [ $i -gt 0 ]; do
  if [ "$(ip addr show | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}' | cut -d'/' -f1)" != "" ]; then
    break
  fi
  echo 1>&2 -en "${CROSS}${RD} No Network! "
  sleep $RETRY_EVERY
  i=$((i-1))
done

if [ "$(ip addr show | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}' | cut -d'/' -f1)" = "" ]; then
  echo 1>&2 -e "\n${CROSS}${RD} No Network After $RETRY_NUM Tries${CL}"
  echo -e " 🖧  Check Network Settings"
  exit 1
fi
cat <<EOF >/etc/apk/repositories
https://dl-cdn.alpinelinux.org/alpine/latest-stable/main
https://dl-cdn.alpinelinux.org/alpine/latest-stable/community
EOF
msg_ok "Set up Container OS"
msg_ok "Network Connected: ${BL}$(ip addr show | grep 'inet ' | awk '{print $2}' | cut -d'/' -f1 | tail -n1)${CL}"

set +e
trap - ERR
if ping -c 1 -W 1 1.1.1.1 &> /dev/null; then msg_ok "Internet Connected"; else
  msg_error "Internet NOT Connected"
    read -r -p "Would you like to continue anyway? <y/N> " prompt
    if echo "$prompt" | grep -Ei "^(y|yes)$" > /dev/null; then
      echo -e " ⚠️  ${RD}Expect Issues Without Internet${CL}"
    else
      echo -e " 🖧  Check Network Settings"
      exit 1
    fi
fi

RESOLVEDIP=$(getent hosts github.com | awk '{ print $1 }')
if [[ -z "$RESOLVEDIP" ]]; then msg_error "DNS Lookup Failure"; else msg_ok "DNS Resolved github.com to ${BL}$RESOLVEDIP${CL}"; fi
set -e
trap 'error_handler $LINENO "$BASH_COMMAND"' ERR

msg_info "Updating Container OS"
$STD apk update
$STD apk upgrade
msg_ok "Updated Container OS"

msg_info "Installing Dependencies"
$STD apk add wget
$STD apk add bash
$STD apk add curl
$STD apk add nano
$STD apk add mc
$STD apk add openssh
msg_ok "Installed Dependencies"

msg_info "Installing AdguardHome"
VER=$(curl --silent -qI https://github.com/AdguardTeam/AdGuardHome/releases/latest | awk -F '/' '/^location/ {print  substr($NF, 1, length($NF)-1)}');
$STD wget -q "https://github.com/AdguardTeam/AdGuardHome/releases/download/$VER/AdGuardHome_linux_amd64.tar.gz"
$STD tar -xvf AdGuardHome_linux_amd64.tar.gz >/dev/null 2>&1
$STD mv AdGuardHome /opt
$STD rm AdGuardHome_linux_amd64.tar.gz
$STD chmod +x /opt/AdGuardHome/AdGuardHome
$STD /opt/AdGuardHome/AdGuardHome -s install
$STD /opt/AdGuardHome/AdGuardHome -s start
$STD msg_ok "Installed AdguardHome"

echo -e "$APPLICATION LXC provided by https://tteck.github.io/Proxmox/\n" > /etc/motd
if [[ "${SSH_ROOT}" == "yes" ]]; then
  $STD rc-update add sshd
  $STD /etc/init.d/sshd start
fi