#!/usr/bin/env bash
# deploy/lib/common.sh — crypto_okx 部署公共函数
set -e
set -u
if [ -n "${BASH_VERSION:-}" ]; then
  set -o pipefail
fi

INSTALL_ROOT="${INSTALL_ROOT:-/opt/crypto_okx}"
GIT_URL="${GIT_URL:-https://git.bz121.com/dekun/crypto_okx.git}"
GIT_BRANCH="${GIT_BRANCH:-main}"
BACKUP_ROOT="${BACKUP_ROOT:-/root/backups}"
TZ_NAME="${CM_TZ:-Asia/Shanghai}"
NODE_MAJOR="${NODE_MAJOR:-20}"
APP_PORT="${APP_PORT:-5004}"
PM2_APP_NAME="${PM2_APP_NAME:-crypto_okx}"

LIB_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEPLOY_DIR="$(cd "${LIB_DIR}/.." && pwd)"
REPO_ROOT="$(cd "${DEPLOY_DIR}/.." && pwd)"

PM2_APPS=(
  crypto_okx
)

# 历史进程名(仅 stop/delete 时兼容)
PM2_APPS_LEGACY=(
  crypto-monitor-okx
  crypto-monitor
)

CONFIG_PATHS=(
  .env
)

log() { printf '[%s] %s\n' "$(TZ="${TZ_NAME}" date '+%Y-%m-%d %H:%M:%S')" "$*"; }
step() { echo ""; log "==> $*"; }

die() {
  echo "错误: $*" >&2
  exit 1
}

require_root() {
  if [[ "$(id -u)" -ne 0 ]]; then
    die "请使用 root 执行(推荐: sudo -i 后运行)"
  fi
}

require_ubuntu() {
  if [[ ! -f /etc/os-release ]]; then
    log "警告: 未检测到 /etc/os-release,跳过 Ubuntu 版本检查"
    return 0
  fi
  # shellcheck source=/dev/null
  source /etc/os-release
  if [[ "${ID:-}" != "ubuntu" ]]; then
    log "警告: 当前系统为 ${ID:-unknown},官方仅测试 Ubuntu 22.04/24.04"
    return 0
  fi
  local ver="${VERSION_ID:-}"
  if [[ "${ver}" != "22.04" && "${ver}" != "24.04" ]]; then
    log "警告: Ubuntu ${ver} 未在文档中明确测试,继续执行"
  fi
}

detect_server_ip() {
  local ip=""
  if command -v hostname >/dev/null 2>&1; then
    ip="$(hostname -I 2>/dev/null | awk '{print $1}')"
  fi
  if [[ -z "${ip}" ]]; then
    ip="127.0.0.1"
  fi
  echo "${ip}"
}

confirm_yes() {
  local msg="$1"
  local ans=""
  cm_read ans "${msg} [y/N] "
  [[ "${ans}" == [yY] || "${ans}" == [yY][eE][sS] ]]
}

confirm_uninstall() {
  local ans=""
  echo "此操作将停止 crypto_okx PM2 进程并移走安装目录."
  cm_read ans "输入 UNINSTALL 确认卸载: "
  [[ "${ans}" == "UNINSTALL" ]]
}

# curl | bash 时 stdin 是管道,须从 /dev/tty 读取用户输入
cm_read() {
  local __var="$1"
  local __prompt="$2"
  local __val=""
  if [[ -r /dev/tty ]]; then
    IFS= read -r -p "${__prompt}" __val </dev/tty || true
  else
    IFS= read -r -p "${__prompt}" __val || true
  fi
  printf -v "${__var}" '%s' "${__val}"
}

repo_ready() {
  [[ -f "${1}/deploy/setup_env.sh" && -f "${1}/deploy/manage.sh" && -f "${1}/app.py" ]]
}

resolve_repo_root() {
  if repo_ready "${INSTALL_ROOT}"; then
    echo "${INSTALL_ROOT}"
    return 0
  fi
  if repo_ready "${REPO_ROOT}"; then
    echo "${REPO_ROOT}"
    return 0
  fi
  return 1
}

backup_configs_to() {
  local src_root="$1"
  local dest="$2"
  mkdir -p "${dest}"
  local rel copied=0
  for rel in "${CONFIG_PATHS[@]}"; do
    local src="${src_root}/${rel}"
    if [[ -f "${src}" ]]; then
      mkdir -p "${dest}/$(dirname "${rel}")"
      cp -a "${src}" "${dest}/${rel}"
      log "backup ${rel}"
      copied=$((copied + 1))
    fi
  done
  if [[ "${copied}" -eq 0 ]]; then
    log "提示: 未找到可备份的配置文件"
  fi
}

install_system_packages() {
  step "安装系统依赖"
  if ! command -v apt-get >/dev/null 2>&1; then
    die "未检测到 apt-get,请手动安装 python3-venv git curl"
  fi
  export DEBIAN_FRONTEND=noninteractive
  apt-get update -qq
  apt-get install -y python3 python3-pip python3-venv curl git ca-certificates
  local pyver=""
  if command -v python3 >/dev/null 2>&1; then
    pyver="$(python3 -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')"
    apt-get install -y "python${pyver}-venv" 2>/dev/null || apt-get install -y python3-venv
  fi
}

install_node_pm2() {
  step "检查 Node.js 与 PM2"
  if command -v pm2 >/dev/null 2>&1; then
    log "PM2 已安装: $(pm2 -v)"
    return 0
  fi
  if ! command -v node >/dev/null 2>&1; then
    log "安装 Node.js ${NODE_MAJOR}.x ..."
    curl -fsSL "https://deb.nodesource.com/setup_${NODE_MAJOR}.x" | bash -
    apt-get install -y nodejs
  fi
  log "安装 PM2 ..."
  npm install -g pm2
  log "PM2: $(pm2 -v)"
}

pip_progress_bar_arg() {
  echo "on"
}

pip_upgrade_tools() {
  local pip_bin="$1"
  local bar
  bar="$(pip_progress_bar_arg)"
  echo "  升级 pip ..."
  "${pip_bin}" install -U pip setuptools wheel \
    --disable-pip-version-check \
    --progress-bar "${bar}"
}

pip_install_requirements() {
  local pip_bin="$1"
  local req_file="$2"
  local label="${3:-依赖}"
  local bar
  bar="$(pip_progress_bar_arg)"
  echo "  安装${label} (下方为 pip 进度) ..."
  [[ -f "${req_file}" ]] || die "缺少依赖文件: ${req_file}"
  "${pip_bin}" install -r "${req_file}" \
    --disable-pip-version-check \
    --retries 5 \
    --progress-bar "${bar}"
  echo "  ${label}安装完成"
}

install_backup_cron() {
  step "安装每日备份 cron"
  local inst="${REPO_ROOT}/scripts/install_backup_cron.sh"
  if [[ -f "${inst}" ]]; then
    chmod +x "${inst}"
    bash "${inst}" || log "警告: cron 安装失败"
  else
    log "未找到 scripts/install_backup_cron.sh,跳过"
  fi
}

remove_backup_cron() {
  step "移除备份 cron"
  local tmp removed=0
  tmp="$(mktemp)"
  if ! crontab -l 2>/dev/null >"${tmp}"; then
    rm -f "${tmp}"
    return 0
  fi
  local filtered
  filtered="$(grep -vF "backup_data.sh" "${tmp}" || true)"
  if [[ "${filtered}" != "$(cat "${tmp}")" ]]; then
    printf '%s\n' "${filtered}" | awk '
      BEGIN { tz = 0 }
      /^CRON_TZ=Asia\/Shanghai$/ {
        if (tz++) next
      }
      { print }
    ' | crontab -
    removed=1
  fi
  rm -f "${tmp}"
  if [[ "${removed}" -eq 1 ]]; then
    log "已移除 backup_data.sh 相关 cron"
  fi
}

pm2_app_exists() {
  local name="$1"
  # pm2 pid 在部分版本对不存在的进程仍返回 0;改用 jlist 精确匹配 name
  if ! command -v pm2 >/dev/null 2>&1; then
    return 1
  fi
  if ! command -v python3 >/dev/null 2>&1; then
    pm2 describe "${name}" 2>/dev/null | grep -q "status"
    return $?
  fi
  pm2 jlist 2>/dev/null | python3 -c '
import json,sys
name=sys.argv[1]
try:
    apps=json.load(sys.stdin)
except Exception:
    sys.exit(1)
sys.exit(0 if any(isinstance(a,dict) and a.get("name")==name for a in (apps or [])) else 1)
' "${name}"
}

pm2_stop_project_apps() {
  if ! command -v pm2 >/dev/null 2>&1; then
    log "未安装 pm2,跳过"
    return 0
  fi
  local name stopped=0
  for name in "${PM2_APPS[@]}" "${PM2_APPS_LEGACY[@]}"; do
    if pm2_app_exists "${name}"; then
      log "pm2 stop ${name}"
      pm2 stop "${name}" 2>/dev/null || true
      stopped=$((stopped + 1))
    fi
  done
  if [[ "${stopped}" -eq 0 ]]; then
    log "未发现本项目 PM2 进程(其它 PM2 不受影响)"
  fi
}

pm2_delete_project_apps() {
  if ! command -v pm2 >/dev/null 2>&1; then
    return 0
  fi
  local name deleted=0
  for name in "${PM2_APPS[@]}" "${PM2_APPS_LEGACY[@]}"; do
    if pm2_app_exists "${name}"; then
      log "pm2 delete ${name}"
      pm2 delete "${name}" 2>/dev/null || true
      deleted=$((deleted + 1))
    fi
  done
  if [[ "${deleted}" -gt 0 ]]; then
    pm2 save 2>/dev/null || true
  fi
}

pm2_start_app() {
  step "启动 PM2: ${PM2_APP_NAME}"
  cd "${REPO_ROOT}"
  [[ -f "${REPO_ROOT}/ecosystem.config.cjs" ]] || die "缺少 ecosystem.config.cjs"
  [[ -x "${REPO_ROOT}/.venv/bin/python" ]] || die "缺少 .venv,请先运行 setup_env.sh"
  if pm2_app_exists "${PM2_APP_NAME}"; then
    log "已存在,执行 restart --update-env"
    if ! pm2 restart "${PM2_APP_NAME}" --update-env; then
      log "restart 失败,改为 start ecosystem.config.cjs"
      pm2 start ecosystem.config.cjs
    fi
  else
    log "首次启动: pm2 start ecosystem.config.cjs"
    pm2 start ecosystem.config.cjs
  fi
}

pm2_save_startup() {
  step "PM2 save & startup"
  pm2 save 2>/dev/null || true
  if pm2 startup systemd -u root --hp /root 2>/dev/null | grep -q "sudo"; then
    pm2 startup systemd -u root --hp /root 2>/dev/null | grep "^sudo" | bash || true
  else
    pm2 startup 2>/dev/null || true
  fi
}

is_deployed() {
  local root="$1"
  [[ -x "${root}/.venv/bin/python" ]]
}

read_app_port() {
  local env_file="${REPO_ROOT}/.env"
  local port="${APP_PORT}"
  if [[ -f "${env_file}" ]]; then
    local line
    line="$(grep -E '^[[:space:]]*APP_PORT=' "${env_file}" | tail -n1 || true)"
    if [[ -n "${line}" ]]; then
      port="${line#*=}"
      port="$(echo "${port}" | tr -d '"' | tr -d "'" | xargs)"
    fi
  fi
  echo "${port:-5004}"
}

check_http() {
  local url="$1"
  local code
  code="$(curl -sS -o /dev/null -w '%{http_code}' --connect-timeout 5 --max-time 8 "${url}" 2>/dev/null || echo "000")"
  [[ "${code}" == "200" || "${code}" == "302" || "${code}" == "301" || "${code}" == "401" || "${code}" == "403" ]]
}

verify_deployment() {
  local ip="${1:-$(detect_server_ip)}"
  local port
  local ok=1
  local attempt max_attempts=20
  port="$(read_app_port)"

  step "部署验收"
  if command -v pm2 >/dev/null 2>&1 && pm2_app_exists "${PM2_APP_NAME}"; then
    echo "  [✓] PM2 ${PM2_APP_NAME} 已注册"
  else
    echo "  [✗] PM2 缺少进程 ${PM2_APP_NAME}"
    ok=0
    pm2 list 2>/dev/null || true
  fi

  # Flask 冷启动常需数秒;立刻 curl 易误报
  echo "  ... 等待页面就绪 (最多约 ${max_attempts}s,端口 ${port})"
  local http_ok=0
  for attempt in $(seq 1 "${max_attempts}"); do
    if check_http "http://127.0.0.1:${port}/"; then
      http_ok=1
      break
    fi
    # 进程已挂掉则提前失败
    if command -v pm2 >/dev/null 2>&1 && ! pm2_app_exists "${PM2_APP_NAME}"; then
      echo "  [✗] 等待期间 PM2 进程消失"
      ok=0
      break
    fi
    local status=""
    status="$(pm2 jlist 2>/dev/null | python3 -c '
import json,sys
name="'"${PM2_APP_NAME}"'"
try:
    apps=json.load(sys.stdin)
except Exception:
    print(""); sys.exit(0)
for a in apps or []:
    if isinstance(a,dict) and a.get("name")==name:
        print((a.get("pm2_env") or {}).get("status") or "")
        break
' 2>/dev/null || true)"
    if [[ "${status}" == "errored" || "${status}" == "stopped" ]]; then
      echo "  [✗] PM2 状态为 ${status}"
      ok=0
      break
    fi
    sleep 1
  done

  if [[ "${http_ok}" -eq 1 ]]; then
    echo "  [✓] 页面可访问 (http://127.0.0.1:${port}/)"
  else
    echo "  [✗] 页面不可访问 (http://127.0.0.1:${port}/)"
    ok=0
    echo "  排查: pm2 logs ${PM2_APP_NAME} --lines 50"
    echo "  确认端口: grep APP_PORT ${REPO_ROOT}/.env"
  fi

  if [[ "${ok}" -eq 1 ]]; then
    echo ""
    log "验收通过: 进程在线 + 页面可打开"
    return 0
  fi
  echo ""
  log "验收未完全通过,可执行: pm2 logs ${PM2_APP_NAME} --lines 30"
  return 1
}

print_post_install_guide() {
  local ip="${1:-$(detect_server_ip)}"
  local port
  port="$(read_app_port)"
  cat <<EOF

═══════════════════════════════════════════
  ✅ crypto_okx 部署完成

  访问:  http://${ip}:${port}
  默认入口: /options (期权)

  登录账号: admin
  登录密码: 见 .env 中 APP_PASSWORD(首次多为 admin123)
  （请尽快在「系统设置 / env 配置」中修改）

  下一步:
  1. 浏览器打开上方地址
  2. 系统设置 → 填 OKX API / 企业微信 / 代理
  3. 需要实盘时开启 LIVE_TRADING_ENABLED 并保存重启

  管理:
    bash ${INSTALL_ROOT}/deploy/manage.sh
  仓库:
    ${GIT_URL}
═══════════════════════════════════════════
EOF
}

doctor_report() {
  step "环境识别"
  if [[ -f /etc/os-release ]]; then
    # shellcheck source=/dev/null
    source /etc/os-release
    echo "  OS: ${PRETTY_NAME:-${ID:-unknown} ${VERSION_ID:-}}"
  else
    echo "  OS: unknown"
  fi
  echo "  用户: $(id -un) (uid=$(id -u))"
  echo "  主机: $(hostname 2>/dev/null || echo '?')"
  echo "  IP:   $(detect_server_ip)"
  echo "  安装根: ${INSTALL_ROOT}"
  echo "  仓库: ${GIT_URL} (${GIT_BRANCH})"

  step "依赖检测"
  local item cmd
  for item in "python3:python3" "git:git" "curl:curl" "node:node" "npm:npm" "pm2:pm2"; do
    cmd="${item#*:}"
    if command -v "${cmd}" >/dev/null 2>&1; then
      case "${cmd}" in
        python3) echo "  [✓] python3: $(python3 --version 2>&1)" ;;
        node) echo "  [✓] node: $(node -v 2>&1)" ;;
        npm) echo "  [✓] npm: $(npm -v 2>&1)" ;;
        pm2) echo "  [✓] pm2: $(pm2 -v 2>&1)" ;;
        *) echo "  [✓] ${cmd}: $(command -v "${cmd}")" ;;
      esac
    else
      echo "  [✗] ${cmd}: 未安装"
    fi
  done

  if command -v python3 >/dev/null 2>&1; then
    local ver major minor
    ver="$(python3 -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')"
    major="${ver%%.*}"
    minor="${ver#*.}"
    if [[ "${major}" -gt 3 ]] || [[ "${major}" -eq 3 && "${minor}" -ge 10 ]]; then
      echo "  [✓] Python 版本满足 3.10+ (${ver})"
    else
      echo "  [✗] Python 需要 3.10+,当前 ${ver}"
    fi
  fi

  step "项目状态"
  local root=""
  if root="$(resolve_repo_root 2>/dev/null)"; then
    echo "  [✓] 仓库就绪: ${root}"
    [[ -f "${root}/requirements.txt" ]] && echo "  [✓] requirements.txt" || echo "  [✗] requirements.txt"
    [[ -f "${root}/ecosystem.config.cjs" ]] && echo "  [✓] ecosystem.config.cjs" || echo "  [✗] ecosystem.config.cjs"
    [[ -f "${root}/.env" ]] && echo "  [✓] .env 已存在" || echo "  [!] .env 尚未生成"
    if [[ -x "${root}/.venv/bin/python" ]]; then
      echo "  [✓] .venv: $("${root}/.venv/bin/python" --version 2>&1)"
    else
      echo "  [!] .venv 未创建"
    fi
  else
    echo "  [!] 尚未安装到 ${INSTALL_ROOT}"
  fi

  if command -v pm2 >/dev/null 2>&1; then
    step "PM2"
    pm2 list 2>/dev/null | head -n 40 || true
  fi
}