#!/usr/bin/env bash
if [ "$VERBOSE" == "yes" ]; then set -x;  STD=""; fi
if [ "$VERBOSE" != "yes" ]; then STD="silent"; fi
silent() { "$@" > /dev/null 2>&1; }
if [ "$DISABLEIPV6" == "yes" ]; then echo "net.ipv6.conf.all.disable_ipv6 = 1" >>/etc/sysctl.conf; $STD sysctl -p; fi
YW=$(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
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 "
sed -i "/$LANG/ s/\(^# \)//" /etc/locale.gen
locale-gen >/dev/null
for ((i=RETRY_NUM; i>0; i--)); do
  if [ "$(hostname -I)" != "" ]; then
    break
  fi
  echo 1>&2 -en "${CROSS}${RD} No Network! "
  sleep $RETRY_EVERY
done
if [ "$(hostname -I)" = "" ]; then
  echo 1>&2 -e "\n${CROSS}${RD} No Network After $RETRY_NUM Tries${CL}"
  echo -e " 🖧  Check Network Settings"
  exit 1
fi
msg_ok "Set up Container OS"
msg_ok "Network Connected: ${BL}$(hostname -I)"

set +e
alias die=''
if nc -zw1 8.8.8.8 443; then msg_ok "Internet Connected"; else
  msg_error "Internet NOT Connected"
    read -r -p "Would you like to continue anyway? <y/N> " prompt
    if [[ $prompt == "y" || $prompt == "Y" || $prompt == "yes" || $prompt == "Yes" ]]; then
      echo -e " ⚠️  ${RD}Expect Issues Without Internet${CL}"
    else
      echo -e " 🖧  Check Network Settings"
      exit 1
    fi
fi
RESOLVEDIP=$(nslookup "github.com" | awk -F':' '/^Address: / { matched = 1 } matched { print $2}' | xargs)
if [[ -z "$RESOLVEDIP" ]]; then msg_error "DNS Lookup Failure"; else msg_ok "DNS Resolved github.com to ${BL}$RESOLVEDIP${CL}"; fi
alias die='EXIT=$? LINE=$LINENO error_exit'
set -e

msg_info "Updating Container OS"
$STD apt-get update
$STD apt-get -y upgrade
msg_ok "Updated Container OS"

msg_info "Installing Dependencies"
$STD apt-get update
$STD apt-get -y install \
  sudo \
  mc \
  curl \
  gnupg \
  make \
  g++ \
  gcc \
  ca-certificates \
  apache2-utils \
  logrotate \
  build-essential \
  python3-dev \
  git \
  lsb-release
msg_ok "Installed Dependencies"

msg_info "Installing Python"
$STD apt-get install -y -q --no-install-recommends python3 python3-pip python3-venv
$STD pip3 install --upgrade setuptools
$STD pip3 install --upgrade pip
$STD python3 -m venv /opt/certbot/
if [ "$(getconf LONG_BIT)" = "32" ]; then
  $STD python3 -m pip install --no-cache-dir -U cryptography==3.3.2
fi
$STD python3 -m pip install --no-cache-dir cffi certbot
msg_ok "Installed Python"

msg_info "Installing Openresty"
$STD apt-key add <(curl -fsSL https://openresty.org/package/pubkey.gpg)
sh -c 'echo "deb http://openresty.org/package/debian $(lsb_release -cs) openresty" > /etc/apt/sources.list.d/openresty.list'
$STD apt-get -y update
$STD apt-get -y install --no-install-recommends openresty
msg_ok "Installed Openresty"

msg_info "Setting up Node.js Repository"
$STD bash <(curl -fsSL https://deb.nodesource.com/setup_16.x)
msg_ok "Set up Node.js Repository"

msg_info "Installing Node.js"
$STD apt-get install -y nodejs
msg_ok "Installed Node.js"

msg_info "Installing Yarn"
$STD npm install --global yarn
msg_ok "Installed Yarn"

RELEASE=$(curl -s https://api.github.com/repos/NginxProxyManager/nginx-proxy-manager/releases/latest |
  grep "tag_name" |
  awk '{print substr($2, 3, length($2)-4) }')

msg_info "Downloading Nginx Proxy Manager v${RELEASE}"
wget -q https://codeload.github.com/NginxProxyManager/nginx-proxy-manager/tar.gz/v${RELEASE} -O - | tar -xz
cd ./nginx-proxy-manager-${RELEASE}
msg_ok "Downloaded Nginx Proxy Manager v${RELEASE}"

msg_info "Setting up Enviroment"
ln -sf /usr/bin/python3 /usr/bin/python
ln -sf /usr/bin/certbot /opt/certbot/bin/certbot
ln -sf /usr/local/openresty/nginx/sbin/nginx /usr/sbin/nginx
ln -sf /usr/local/openresty/nginx/ /etc/nginx

sed -i "s+0.0.0+${RELEASE}+g" backend/package.json
sed -i "s+0.0.0+${RELEASE}+g" frontend/package.json

sed -i 's+^daemon+#daemon+g' docker/rootfs/etc/nginx/nginx.conf
NGINX_CONFS=$(find "$(pwd)" -type f -name "*.conf")
for NGINX_CONF in $NGINX_CONFS; do
  sed -i 's+include conf.d+include /etc/nginx/conf.d+g' "$NGINX_CONF"
done

mkdir -p /var/www/html /etc/nginx/logs
cp -r docker/rootfs/var/www/html/* /var/www/html/
cp -r docker/rootfs/etc/nginx/* /etc/nginx/
cp docker/rootfs/etc/letsencrypt.ini /etc/letsencrypt.ini
cp docker/rootfs/etc/logrotate.d/nginx-proxy-manager /etc/logrotate.d/nginx-proxy-manager
ln -sf /etc/nginx/nginx.conf /etc/nginx/conf/nginx.conf
rm -f /etc/nginx/conf.d/dev.conf

mkdir -p /tmp/nginx/body \
  /run/nginx \
  /data/nginx \
  /data/custom_ssl \
  /data/logs \
  /data/access \
  /data/nginx/default_host \
  /data/nginx/default_www \
  /data/nginx/proxy_host \
  /data/nginx/redirection_host \
  /data/nginx/stream \
  /data/nginx/dead_host \
  /data/nginx/temp \
  /var/lib/nginx/cache/public \
  /var/lib/nginx/cache/private \
  /var/cache/nginx/proxy_temp

chmod -R 777 /var/cache/nginx
chown root /tmp/nginx

echo resolver "$(awk 'BEGIN{ORS=" "} $1=="nameserver" {print ($2 ~ ":")? "["$2"]": $2}' /etc/resolv.conf);" >/etc/nginx/conf.d/include/resolvers.conf

if [ ! -f /data/nginx/dummycert.pem ] || [ ! -f /data/nginx/dummykey.pem ]; then
  echo -en "${GN} Generating dummy SSL Certificate... "
  openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 -subj "/O=Nginx Proxy Manager/OU=Dummy Certificate/CN=localhost" -keyout /data/nginx/dummykey.pem -out /data/nginx/dummycert.pem &>/dev/null
fi

mkdir -p /app/global /app/frontend/images
cp -r backend/* /app
cp -r global/* /app/global
msg_ok "Set up Enviroment"

msg_info "Building Frontend"
cd ./frontend
export NODE_ENV=development
$STD yarn install --network-timeout=30000
$STD yarn build
cp -r dist/* /app/frontend
cp -r app-images/* /app/frontend/images
msg_ok "Built Frontend"

msg_info "Initializing Backend"
rm -rf /app/config/default.json
if [ ! -f /app/config/production.json ]; then
  cat <<'EOF' >/app/config/production.json
{
  "database": {
    "engine": "knex-native",
    "knex": {
      "client": "sqlite3",
      "connection": {
        "filename": "/data/database.sqlite"
      }
    }
  }
}
EOF
fi
cd /app
export NODE_ENV=development
$STD yarn install --network-timeout=30000
msg_ok "Initialized Backend"

msg_info "Creating Service"
cat <<'EOF' >/lib/systemd/system/npm.service
[Unit]
Description=Nginx Proxy Manager
After=network.target
Wants=openresty.service

[Service]
Type=simple
Environment=NODE_ENV=production
ExecStartPre=-mkdir -p /tmp/nginx/body /data/letsencrypt-acme-challenge
ExecStart=/usr/bin/node index.js --abort_on_uncaught_exception --max_old_space_size=250
WorkingDirectory=/app
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF
msg_ok "Created Service"

echo "export TERM='xterm-256color'" >>/root/.bashrc
if ! getent shadow root | grep -q "^root:[^\!*]"; then
  msg_info "Customizing Container"
OS=$(grep "^ID=" /etc/os-release | cut -d'=' -f2)
if [ "$OS" == "debian" ]; then rm /etc/motd /etc/update-motd.d/10-uname; else chmod -x /etc/update-motd.d/*; fi
  touch ~/.hushlogin
  GETTY_OVERRIDE="/etc/systemd/system/container-getty@1.service.d/override.conf"
  mkdir -p $(dirname $GETTY_OVERRIDE)
  cat <<EOF >$GETTY_OVERRIDE
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 \$TERM
EOF
  systemctl daemon-reload
  systemctl restart $(basename $(dirname $GETTY_OVERRIDE) | sed 's/\.d//')
  msg_ok "Customized Container"
fi
if [[ "${SSH_ROOT}" == "yes" ]]; then sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g" /etc/ssh/sshd_config; systemctl restart sshd; fi

msg_info "Starting Services"
$STD systemctl enable --now openresty
$STD systemctl enable --now npm
msg_ok "Started Services"

msg_info "Cleaning up"
$STD apt-get autoremove
$STD apt-get autoclean
msg_ok "Cleaned"