#!/bin/sh

ACTION=${1}
shift 1

get_image() {
  IMAGE_NAME=$(uci get bookstack.@bookstack[0].image_name 2>/dev/null)
}

do_install_detail() {
  local config=$(uci get bookstack.@bookstack[0].config_path 2>/dev/null)
  local port=$(uci get bookstack.@bookstack[0].port 2>/dev/null)
  local IMAGE_NAME=$(uci get bookstack.@bookstack[0].image_name 2>/dev/null)
  local username=$(uci get bookstack.@bookstack[0].username 2>/dev/null)
  local password=$(uci get bookstack.@bookstack[0].password 2>/dev/null)

  GEN_PASS=$(< /dev/urandom tr -dc A-Za-z0-9 2>/dev/null | head -c14; echo)
  GEN_PASS2=$(< /dev/urandom tr -dc A-Za-z0-9 2>/dev/null | head -c14; echo)

  LAN_IP=$(uci get network.lan.ipaddr)
  LAN_IP="${LAN_IP%/*}"

  [ -z "$config" ] && echo "config path is empty!" && exit 1
  [ -z "$port" ] && port=6875
  [ -z "$IMAGE_NAME" ] && IMAGE_NAME=lscr.io/linuxserver/bookstack

  rm -R /opt/docker2/compose/bookstack-app
  mkdir /opt/docker2/compose/bookstack-app
  touch /opt/docker2/compose/bookstack-app/docker-compose.yml
  cat > /opt/docker2/compose/bookstack-app/docker-compose.yml <<EOF
version: "2"
services:
  bookstack:
    image: $IMAGE_NAME
    ports:
      - ${LAN_IP}:$port:80
    environment:
      - PUID=1000
      - PGID=1000
      - APP_URL=http://${LAN_IP}:$port
      - DB_HOST=bookstack_db
      - DB_USER=bookstack
      - DB_PASS=${GEN_PASS}
      - DB_DATABASE=bookstackapp
    volumes:
      - /opt/docker2/compose/bookstack-app/config:/config
    restart: unless-stopped
    depends_on:
      - bookstack_db
  bookstack_db:
    image: lscr.io/linuxserver/mariadb
    environment:
      - PUID=1000
      - PGID=1000
      - MYSQL_ROOT_PASSWORD=${GEN_PASS2}
      - TZ=Europe/London
      - MYSQL_DATABASE=bookstackapp
      - MYSQL_USER=bookstack
      - MYSQL_PASSWORD=${GEN_PASS}
    volumes:
      - /opt/docker2/compose/bookstack-app/data:/config
    restart: unless-stopped
EOF

  docker-compose -f /opt/docker2/compose/bookstack-app/docker-compose.yml up -d

  uci add shortcutmenu lists
  uci set shortcutmenu.@lists[-1].webname="$IMAGE_NAME"
  uci set shortcutmenu.@lists[-1].weburl="$LAN_IP:$port"
  uci set shortcutmenu.@lists[-1].webpath="/"
  uci commit shortcutmenu
}

usage() {
  echo "usage: $0 sub-command"
  echo "where sub-command is one of:"
  echo "      install                Install bookstack"
  echo "      upgrade                Upgrade bookstack"
  echo "      rm/start/stop/restart  Remove/Start/Stop/Restart bookstack"
  echo "      status                 bookstack status"
  echo "      port                   bookstack port"
}

case ${ACTION} in
  "install"|"upgrade")
    get_image
    do_install_detail
  ;;
  "rm")
    get_image
    CONTAINER_IDS=$(docker ps -a --filter "ancestor=${IMAGE_NAME}" --format '{{.ID}}')
    for ID in $CONTAINER_IDS; do
      docker stop $ID
      docker rm $ID
    done
    docker rmi -f $IMAGE_NAME
  ;;
  "start"|"stop"|"restart")
    get_image
    CONTAINER_IDS=$(docker ps -a --filter "ancestor=${IMAGE_NAME}" --format '{{.ID}}')
    for ID in $CONTAINER_IDS; do
      docker ${ACTION} ${ID}
    done
  ;;
  "status")
    get_image
    CONTAINER_NAMES=$(docker ps -a --filter "ancestor=${IMAGE_NAME}" --format '{{.Names}}')
    docker ps --all -f "name=${CONTAINER_NAMES}" --format '{{.Status}}'
  ;;
  "port")
    get_image
    CONTAINER_NAMES=$(docker ps -a --filter "ancestor=${IMAGE_NAME}" --format '{{.Names}}')
    docker ps --all -f "name=${CONTAINER_NAMES}" --format '{{.Ports}}' | grep -om1 '0.0.0.0:[0-9]*' | sed 's/0.0.0.0://'
  ;;
  *)
    usage
    exit 1
  ;;
esac