#!/usr/bin/env bash
# deploy/lib/install.sh — 一键部署(全套) / 单所仅实例
set -e
set -u
if [ -n "${BASH_VERSION:-}" ]; then
  set -o pipefail
fi

LIB_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=common.sh
source "${LIB_DIR}/common.sh"

EXCHANGE=""
while [[ $# -gt 0 ]]; do
  case "$1" in
    --exchange)
      EXCHANGE="${2:-}"
      shift 2
      ;;
    -h|--help)
      echo "用法: bash deploy/lib/install.sh [--exchange okx|binance|gate]"
      echo "  无 --exchange: 全套(三所+中控)"
      echo "  有 --exchange: 仅该所 Flask 实例(不含中控/agent)"
      exit 0
      ;;
    *)
      echo "未知参数: $1" >&2
      exit 1
      ;;
  esac
done

install_fresh() {
  step "克隆仓库"
  if [[ -d "${INSTALL_ROOT}" ]]; then
    die "目录已存在: ${INSTALL_ROOT},请选修复环境或深度重装"
  fi
  mkdir -p "$(dirname "${INSTALL_ROOT}")"
  git clone -b "${GIT_BRANCH}" "${GIT_URL}" "${INSTALL_ROOT}"
}

install_repair() {
  step "修复环境(保留数据与配置)"
  bash "${REPO_ROOT}/deploy/setup_env.sh" --install-system-deps
}

install_deep() {
  step "深度重装(保留 .env,清库)"
  bash "${REPO_ROOT}/deploy/reinstall.sh" --yes
  verify_deployment "$(detect_server_ip)" || true
  print_post_install_guide "$(detect_server_ip)"
}

run_install_pipeline() {
  step "环境部署 setup_env.sh"
  bash "${REPO_ROOT}/deploy/setup_env.sh" --install-system-deps

  step "启动 PM2 全部进程"
  bash "${REPO_ROOT}/deploy/pm2_start_all.sh"

  pm2_save_startup
  install_backup_cron_all

  verify_deployment "$(detect_server_ip)" || true
  print_post_install_guide "$(detect_server_ip)"
}

run_instance_pipeline() {
  local ex_key="$1"
  local dir_name
  dir_name="$(exchange_dir "${ex_key}")"

  step "单所环境部署 setup_env.sh --only ${ex_key}(不含中控)"
  bash "${REPO_ROOT}/deploy/setup_env.sh" --only "${ex_key}" --install-system-deps

  step "启动 PM2 仅 ${dir_name}"
  bash "${REPO_ROOT}/deploy/pm2_start_all.sh" --only "${ex_key}"

  pm2_save_startup
  local cron_script="${REPO_ROOT}/${dir_name}/scripts/install_backup_cron.sh"
  if [[ -x "${cron_script}" ]]; then
    step "安装 ${ex_key} 备份 cron"
    bash "${cron_script}" || true
  fi

  verify_deployment "$(detect_server_ip)" "${ex_key}" || true
  print_post_install_guide_instance "${ex_key}" "$(detect_server_ip)"
}

handle_existing_install() {
  echo ""
  echo "检测到已部署安装: ${INSTALL_ROOT}"
  echo "  a) 取消"
  echo "  b) 修复环境(重建 venv,保留 .env 与数据库)"
  echo "  c) 深度重装(保留 .env,清库,见 reinstall.sh)"
  local choice=""
  cm_read choice "请选择 [a/b/c]: "
  case "${choice}" in
    b|B)
      install_repair
      if command -v pm2 >/dev/null 2>&1; then
        bash "${REPO_ROOT}/deploy/pm2_start_all.sh" 2>/dev/null || pm2 restart all 2>/dev/null || true
        pm2_save_startup
      fi
      verify_deployment "$(detect_server_ip)" || true
      print_post_install_guide "$(detect_server_ip)"
      ;;
    c|C)
      install_deep
      ;;
    *)
      log "已取消"
      ;;
  esac
}

ensure_repo_ready() {
  if repo_ready "${INSTALL_ROOT}"; then
    REPO_ROOT="${INSTALL_ROOT}"
  elif [[ -n "${REPO_ROOT:-}" ]] && repo_ready "${REPO_ROOT}"; then
    :
  else
    REPO_ROOT=""
  fi

  if [[ -z "${REPO_ROOT}" ]]; then
    install_system_packages
    install_node_pm2
    install_fresh
    REPO_ROOT="${INSTALL_ROOT}"
  else
    install_system_packages
    install_node_pm2
  fi
}

main_install_instance() {
  local ex_key="$1"
  require_root
  require_ubuntu
  ensure_repo_ready
  run_instance_pipeline "${ex_key}"
}

main_install() {
  require_root
  require_ubuntu

  if [[ -n "${EXCHANGE}" ]]; then
    local ex_key=""
    if ! ex_key="$(normalize_exchange_key "${EXCHANGE}")"; then
      die "无效 --exchange: ${EXCHANGE} (期望 okx|binance|gate)"
    fi
    main_install_instance "${ex_key}"
    return 0
  fi

  if repo_ready "${INSTALL_ROOT}"; then
    REPO_ROOT="${INSTALL_ROOT}"
  elif repo_ready "${REPO_ROOT}"; then
    :
  else
    REPO_ROOT=""
  fi

  if [[ -n "${REPO_ROOT}" ]] && is_deployed "${REPO_ROOT}"; then
    handle_existing_install
    return 0
  fi

  ensure_repo_ready
  run_install_pipeline
}

main_install "$@"