#!/usr/bin/env bash

set -euo pipefail

usage() {
  cat <<'EOF'
用法:
  ./scripts/deploy/production-stdb-publish.sh --source-dir build/<version> --database <database> [--server-url http://127.0.0.1:3101] [--server local] [--root-dir /stdb] [--run-as-user spacetimedb] [--clear-database]

说明:
  进入维护模式，校验 spacetime_module.wasm.sha256，并在生产实例本机执行 spacetime publish。
  默认使用 http://127.0.0.1:3101，避免与部署机本机 Git/Web 服务的 3000 端口冲突。
  默认使用 /stdb 作为 spacetime CLI root-dir，并以 spacetimedb 用户发布，避免 root CLI 身份污染自托管实例。
  发布时固定追加 --no-config，只使用显式参数，避免工作区或用户目录里的 spacetime 配置干扰目标。
  失败时保留维护模式。
EOF
}

require_argument() {
  local value="$1"
  local label="$2"

  if [[ -z "${value}" ]]; then
    echo "[production-stdb-publish] 缺少参数: ${label}" >&2
    exit 1
  fi
}

validate_spacetime_database_name() {
  local database="$1"

  if [[ ! "${database}" =~ ^[a-z0-9]+(-[a-z0-9]+)*$ ]]; then
    echo "[production-stdb-publish] --database 必须匹配 ^[a-z0-9]+(-[a-z0-9]+)*$: ${database}" >&2
    exit 1
  fi
}

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
SOURCE_DIR=""
DATABASE=""
SERVER_ALIAS="local"
SERVER_URL="http://127.0.0.1:3101"
SPACETIME_ROOT_DIR="/stdb"
RUN_AS_USER="spacetimedb"
CLEAR_DATABASE=0
DEPLOY_COMPLETED=0
PUBLISH_TMP_DIR=""

while [[ $# -gt 0 ]]; do
  case "$1" in
    -h|--help)
      usage
      exit 0
      ;;
    --source-dir)
      SOURCE_DIR="${2:?缺少 --source-dir 的值}"
      shift 2
      ;;
    --database)
      DATABASE="${2:?缺少 --database 的值}"
      shift 2
      ;;
    --server)
      SERVER_ALIAS="${2:?缺少 --server 的值}"
      SERVER_URL=""
      shift 2
      ;;
    --server-url)
      SERVER_URL="${2:?缺少 --server-url 的值}"
      shift 2
      ;;
    --root-dir)
      SPACETIME_ROOT_DIR="${2:?缺少 --root-dir 的值}"
      shift 2
      ;;
    --run-as-user)
      RUN_AS_USER="${2:?缺少 --run-as-user 的值}"
      shift 2
      ;;
    --clear-database)
      CLEAR_DATABASE=1
      shift
      ;;
    *)
      echo "[production-stdb-publish] 未知参数: $1" >&2
      usage >&2
      exit 1
      ;;
  esac
done

require_argument "${SOURCE_DIR}" "--source-dir"
require_argument "${DATABASE}" "--database"
validate_spacetime_database_name "${DATABASE}"

if [[ ! "${SPACETIME_ROOT_DIR}" == /* || "${SPACETIME_ROOT_DIR}" == *".."* ]]; then
  echo "[production-stdb-publish] --root-dir 必须是 Linux 绝对路径且不能包含 ..: ${SPACETIME_ROOT_DIR}" >&2
  exit 1
fi

if [[ -n "${RUN_AS_USER}" && ! "${RUN_AS_USER}" =~ ^[A-Za-z_][A-Za-z0-9_-]*$ ]]; then
  echo "[production-stdb-publish] --run-as-user 只能是本机用户名: ${RUN_AS_USER}" >&2
  exit 1
fi

if [[ ! -d "${SOURCE_DIR}" ]]; then
  echo "[production-stdb-publish] 发布目录不存在: ${SOURCE_DIR}" >&2
  exit 1
fi

SOURCE_DIR="$(cd "${SOURCE_DIR}" && pwd)"

if [[ ! -f "${SOURCE_DIR}/spacetime_module.wasm" || ! -f "${SOURCE_DIR}/spacetime_module.wasm.sha256" ]]; then
  echo "[production-stdb-publish] 缺少 spacetime_module.wasm 或 spacetime_module.wasm.sha256: ${SOURCE_DIR}" >&2
  exit 1
fi

on_exit() {
  local exit_code=$?
  if [[ -n "${PUBLISH_TMP_DIR}" && -d "${PUBLISH_TMP_DIR}" ]]; then
    rm -rf "${PUBLISH_TMP_DIR}"
  fi
  if [[ "${exit_code}" -ne 0 && "${DEPLOY_COMPLETED}" -ne 1 ]]; then
    echo "[production-stdb-publish] 发布失败，保持维护模式。" >&2
  fi
  exit "${exit_code}"
}

trap on_exit EXIT

"${SCRIPT_DIR}/maintenance-on.sh" "spacetime module publish ${DATABASE}"

echo "[production-stdb-publish] 校验 wasm"
(
  cd "${SOURCE_DIR}"
  sha256sum -c spacetime_module.wasm.sha256
)

PUBLISH_ARGS=(
  --root-dir="${SPACETIME_ROOT_DIR}"
  publish
  "${DATABASE}"
  --bin-path "${SOURCE_DIR}/spacetime_module.wasm"
  --yes
  --no-config
)

if [[ -n "${SERVER_URL}" ]]; then
  PUBLISH_ARGS+=(--server "${SERVER_URL}")
else
  PUBLISH_ARGS+=(--server "${SERVER_ALIAS}")
fi

if [[ "${CLEAR_DATABASE}" -eq 1 ]]; then
  PUBLISH_ARGS+=(--clear-database)
fi

if [[ -n "${SERVER_URL}" ]]; then
  echo "[production-stdb-publish] 发布 SpacetimeDB module: ${DATABASE} -> ${SERVER_URL}, root=${SPACETIME_ROOT_DIR}"
else
  echo "[production-stdb-publish] 发布 SpacetimeDB module: ${DATABASE} -> ${SERVER_ALIAS}, root=${SPACETIME_ROOT_DIR}"
fi

if [[ -n "${RUN_AS_USER}" && "$(id -u)" -eq 0 ]]; then
  if ! id "${RUN_AS_USER}" >/dev/null 2>&1; then
    echo "[production-stdb-publish] 发布用户不存在: ${RUN_AS_USER}" >&2
    exit 1
  fi
  PUBLISH_TMP_DIR="$(mktemp -d /tmp/genarrative-stdb-publish.XXXXXX)"
  install -m 0644 "${SOURCE_DIR}/spacetime_module.wasm" "${PUBLISH_TMP_DIR}/spacetime_module.wasm"
  chown -R "${RUN_AS_USER}:${RUN_AS_USER}" "${PUBLISH_TMP_DIR}"
  PUBLISH_ARGS=(
    --root-dir="${SPACETIME_ROOT_DIR}"
    publish
    "${DATABASE}"
    --bin-path "${PUBLISH_TMP_DIR}/spacetime_module.wasm"
    --yes
    --no-config
  )
  if [[ -n "${SERVER_URL}" ]]; then
    PUBLISH_ARGS+=(--server "${SERVER_URL}")
  else
    PUBLISH_ARGS+=(--server "${SERVER_ALIAS}")
  fi
  if [[ "${CLEAR_DATABASE}" -eq 1 ]]; then
    PUBLISH_ARGS+=(--clear-database)
  fi
  runuser -u "${RUN_AS_USER}" -- spacetime "${PUBLISH_ARGS[@]}"
else
  spacetime "${PUBLISH_ARGS[@]}"
fi

"${SCRIPT_DIR}/maintenance-off.sh"
DEPLOY_COMPLETED=1
echo "[production-stdb-publish] 完成"