#!/usr/bin/env bash
set -euo pipefail

GREEN='\033[32m'; RESET='\033[0m'; YELLOW='\033[33m'; RED='\033[41m'
ask_yn() {
  # $1=提示语  $2=默认值 y|n
  local prompt="$1"
  local def="${2:-n}"
  local show="[y/N]"; [ "$def" = "y" ] && show="[Y/n]"

  while :; do
    printf "%s %s " "$prompt" "$show" > /dev/tty
    IFS= read -r ans < /dev/tty || return 1
    [ -z "$ans" ] && ans="$def"
    case "$ans" in
      [Yy]|[Yy][Ee][Ss]) return 0 ;;
      [Nn]|[Nn][Oo])     return 1 ;;
      *) echo "Please answer y or n." > /dev/tty ;;
    esac
  done
}


#--- 小工具：取当前 backend.ip ---
get_current_ip() {
  if command -v ip >/dev/null 2>&1; then
    ip -4 route get 1.1.1.1 2>/dev/null \
      | awk '{for(i=1;i<=NF;i++) if($i=="src"){print $(i+1); exit}}' \
      | grep -E '^[0-9]+(\.[0-9]+){3}$' && return 0
    # 次选：hostname -I
    hostname -I 2>/dev/null \
      | awk '{print $1}' \
      | grep -E '^[0-9]+(\.[0-9]+){3}$' && return 0
  fi

  # 2) macOS: ipconfig
  if [ "$(uname -s)" = "Darwin" ]; then
    for i in en0 en1 en2; do
      ipconfig getifaddr "$i" 2>/dev/null \
        | grep -E '^[0-9]+(\.[0-9]+){3}$' && return 0
    done
  fi

  # 3) 通用回退：ifconfig 解析
  if command -v ifconfig >/dev/null 2>&1; then
    ifconfig 2>/dev/null \
      | awk '/inet (addr:)?([0-9]+\.){3}[0-9]+/ {
               ip=$2; sub("addr:","",ip);
               if (ip!="127.0.0.1" && ip !~ /^127\./) {print ip; exit}
             }' \
      | grep -E '^[0-9]+(\.[0-9]+){3}$' && return 0
  fi

  # 4) 实在拿不到
  return 1
}

#--- 简单 IPv4 校验（也可接受主机名；如只要 IPv4，保留第一个分支即可） ---
is_valid_host() {
  case "$1" in
    # IPv4 快速匹配 + 数值检查 0–255
    ([0-9]*.[0-9]*.[0-9]*.[0-9]*)
      IFS=. read -r a b c d <<<"$1" || return 1
      for o in "$a" "$b" "$c" "$d"; do
        [[ "$o" =~ ^[0-9]{1,3}$ ]] || return 1
        (( o >= 0 && o <= 255 )) || return 1
      done
      return 0
      ;;
    # 主机名（允许 localhost、域名等）
    ([A-Za-z0-9-]*([.][A-Za-z0-9-]+)*) return 0 ;;
    (*) return 1 ;;
  esac
}

update_frontend_ip() {
  local IP=$1
  local ROOT_DIR=$2
  if [ "$(uname -s)" = "Darwin" ]; then
    sed -E -i '' "s/(host[[:space:]]*:[[:space:]]*['\"])([^'\"]*)(['\"])/\1$NEW_IP\3/" frontend/api.js
  else
    sed -E -i.bak "s/(host[[:space:]]*:[[:space:]]*['\"])([^'\"]*)(['\"])/\1$NEW_IP\3/" frontend/api.js

  fi
}

need_sudo() {
  if [ "$EUID" -ne 0 ]; then echo "sudo" ; else echo "" ; fi
}

detect_distro() {
  if [ -r /etc/os-release ]; then
    . /etc/os-release
    echo "${ID:-unknown}|${ID_LIKE:-}"
  else
    echo "unknown|"
  fi
}

install_debian() {
  local SUDO=$(need_sudo)
  $SUDO apt-get update -y
  # python3-venv 是 Debian/Ubuntu 系 venv 必需包
  $SUDO apt-get install -y python3 python3-venv python3-pip build-essential
}

install_arch() {
  local SUDO=$(need_sudo)
  # Arch 的 python 包自带 venv 模块
  $SUDO pacman -Sy --needed --noconfirm python python-pip base-devel
}

install_rhel() {
  local SUDO=$(need_sudo)
  # 优先 dnf；旧版用 yum。RHEL/CentOS/Fedora 的 python3 自带 venv
  if command -v dnf >/dev/null 2>&1; then
    $SUDO dnf -y install python3 python3-pip
    # 开发工具组（可选）
    $SUDO dnf -y groupinstall "Development Tools" || true
  else
    $SUDO yum -y install python3 python3-pip || true
    $SUDO yum -y groupinstall "Development Tools" || true
  fi
}

install_python_venv() {
  local info; info=$(detect_distro)
  local id="${info%%|*}"; local like="${info#*|}"
  echo "Detected: id=$id, like=$like"

  case "$id" in
    arch|manjaro)
      install_arch ;;
    ubuntu|debian|linuxmint|pop|elementary|neon|kali|raspbian)
      install_debian ;;
    fedora|centos|rhel|rocky|almalinux|ol)
      install_rhel ;;
    *)
      # 用 ID_LIKE 兜底
      if echo "$like" | grep -qi "debian"; then
        install_debian
      elif echo "$like" | grep -Eiq "rhel|fedora|centos"; then
        install_rhel
      elif echo "$like" | grep -qi "arch"; then
        install_arch
      else
        echo "Unknown Linux distro: $id. Please install it manualy"
        echo "  Debian/Ubuntu: sudo apt-get install -y python3 python3-venv python3-pip"
        echo "  Arch/Manjaro:  sudo pacman -S python python-pip"
        echo "  RHEL/CentOS:   sudo dnf/yum install -y python3 python3-pip"
        exit 1
      fi
      ;;
  esase

  # 验证 venv 可用
  if python3 - <<'PY'
import sys, subprocess, tempfile, os
try:
    d = tempfile.mkdtemp(prefix="venv_test_")
    subprocess.check_call([sys.executable, "-m", "venv", os.path.join(d, "v")], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
    print("OK")
except Exception as e:
    print("ERR", e)
    raise
PY
  then
    echo "✅ python3 venv usable"
  else
    echo "❌ venv not usable Please check whether it's installed (Debian/Ubuntu: python3-venv)" >&2
    exit 1
  fi
}


if [ -n "$NO_COLOR" ]; then GREEN=''; RESET=''; fi

root=$(git rev-parse --show-toplevel 2>/dev/null) || root=""
if [ -n "$root" ]; then 
  echo -e "${GREEN}==>${RESET} ✅Inside a git repo, root: ${root}"
  echo -e "${GREEN}==>${RESET} Checking for update..."
  git pull origin master
else
  echo -e "${YELLOW}==>${RESET} Repo enviroment not found"
  if ask_yn "Do you wish to clone it from github?" y; then
    echo "${GREEN}==>${RESET} Cloning from remote..."
    git clone https://github.com/ClovertaTheTrilobita/cellpose-web.git
  fi
fi

if ! cd cellpose-web; then
  echo "${RED}==>${RESET} directory 'cellpose-web' not found or inaccessible, did git clone run successfully?" >&2
  exit 1
fi

root=$(pwd)
echo -e "${GREEN}==>${RESET} STARTING DEPLOY..."

FILE="${root}/backend/config.yaml"
DEFAULT_IP="$(get_current_ip || true)"
echo -e "${GREEN}==>${RESET} Enter IP address of your machine (empty: default ${DEFAULT_IP}):"
[ -n "${curr_ip:-}" ] && prompt="$prompt (current: $curr_ip)"
printf "%s: " "$prompt" > /dev/tty
IFS= read -r NEW_IP < /dev/tty

# 默认回车使用探测到的 IP
if [ -z "${NEW_IP}" ]; then
  if [ -n "${DEFAULT_IP:-}" ]; then
    NEW_IP="$DEFAULT_IP"
    echo -e "${GREEN}==>${RESET} Using detected IP: $NEW_IP"
  else
    echo -e "${RED}==>${RESET} No input and no IP detected. Aborted." >&2
    exit 1
  fi
fi

if ! is_valid_host "$NEW_IP"; then
  echo -e "${RED}==>${RESET} Invalid IP/hostname: $NEW_IP" >&2
  if ask_yn "Do you wish to use default ip (${DEFAULT_IP})?" y; then
    echo -e "${GREEN}==>${RESET} Using detected IP: $NEW_IP"
  else
    exit 1
  fi
fi

cp -a -- "$FILE" "$FILE.bak.$(date +%Y%m%d%H%M%S)"

if command -v yq >/dev/null 2>&1; then
  NEW_IP_ENV="$NEW_IP" yq -i '.backend.ip = strenv(NEW_IP_ENV)' "$FILE"
else
  awk -v newip="$NEW_IP" '
    BEGIN{in=0; base=-1; done=0}
    /^[[:space:]]*backend:[[:space:]]*$/ {in=1; base=match($0,/[^ ]/)-1; print; next}
    {
      if(in && !done){
        ind=match($0,/[^ ]/)-1
        if(ind<=base){in=0}
        else if($0 ~ /^[[:space:]]*ip:[[:space:]]*/){
          match($0,/^[[:space:]]*/); sp=substr($0,1,RLENGTH)
          print sp "ip: " newip
          done=1; next
        }
      }
      print
    }
  ' "$FILE" > "$FILE.tmp" && mv "$FILE.tmp" "$FILE"
fi

echo -e "${GREEN}==>${RESET} Updated backend.ip -> $NEW_IP in $FILE"

update_frontend_ip $NEW_IP

echo -e "${GREEN}==>${RESET} Update host -> $NEW_IP in frontend/api.js"

if ! conda; then
  echo -e "${YELLOW}==>${RESET} Conda enviroment NOT FOUND"
  echo "We highly recommend you to use Conda to manage python enviroments"
  if ask_yn "Do you wish to install miniconda?" y; then
    wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh 
    bash miniconda.sh -b -p $HOME/miniconda3 
    rm miniconda.sh 
    eval "$($HOME/miniconda3/bin/conda shell.bash hook)" 
    conda init
  else
    echo -e "${GREEN}==>${RESET} Creating Python venv..."
   if [ "$(uname -s)" = "Darwin" ]; then
     if ! brew install python; them 
       echo -e"${RED}==>${RESET} You are using macOS/BSD with no homebrew, we don't recommend you to use system python on macOS, aborting..."
       exit 1
     fi
   else
    install_python_venv "$@"
    python3 -m venv .venv
    . .venv/bin/activate
    python -V
    echo -e "${GREEN}==>${RESET} Successfully created venv"
   fi
  fi
else
  conda create -n cpweb python=3.12 || true
  conda activate cpweb
fi

if ! cd "${root}/backend"; then
  echo -e "${RED}==>${RESET} dir backend/ missing, did you edit project structre?"
  exit 1
fi

echo -e "${GREEN}==>${RESET} Preparing to install dependencies..."
if ask_yn "Do you want to install it now?" y; then
  pip install -r requirements.txt
else
  echo -e "${YELLOW}==>${RESET} Operation canceled, exiting..."
  exit 1
fi

echo -e "${GREEN}==>${RESET} Deployment successfull"
if ask_yn "Do you wish to start cellpose server now?" y; then
  python main.py
fi