#!/usr/bin/env bash
# 生产部署脚本：启动前拉取最新代码 → 构建镜像 → 停止旧容器 → 启动新容器
# 环境：仅读取 .env.prod（不读 .env）。首次部署请 cp .env.prod.example .env.prod 并编辑后执行本脚本。
# 用法: ./run-docker.sh [-p PORT] [-b BACKEND_PORT] [-d HOST_DATA_DIR]
#   -p, --port PORT           前端宿主机端口，默认 3000
#   -b, --backend-port PORT   后端 API 宿主机端口，默认 8000（容器内固定 8000）
#   -d, --data-dir DIR        数据目录挂载，默认 ./data
cp .env.prod.example .env.prod
set -e

IMAGE_NAME="wechat-admin-backend"
CONTAINER_NAME="wechat-admin-backend"
PORT="${PORT:-3000}"
BACKEND_PORT="${BACKEND_PORT:-8000}"
HOST_DATA_DIR="${HOST_DATA_DIR:-$(pwd)/data}"

while [[ $# -gt 0 ]]; do
  case $1 in
    -p|--port)   PORT="$2";   shift 2 ;;
    -b|--backend-port) BACKEND_PORT="$2"; shift 2 ;;
    -d|--data-dir) HOST_DATA_DIR="$2"; shift 2 ;;
    -h|--help)   echo "Usage: $0 [-p PORT] [-b BACKEND_PORT] [-d HOST_DATA_DIR]"; echo "  -p, --port PORT           frontend (default 3000)"; echo "  -b, --backend-port PORT   backend API (default 8000)"; echo "  -d, --data-dir DIR        data volume (default \$(pwd)/data)"; exit 0 ;;
    *) echo "Unknown option: $1 (use -h for help)"; exit 1 ;;
  esac
done

# 启动前自动获取最新代码（与远端 master 一致，丢弃本地修改）
if git rev-parse --git-dir >/dev/null 2>&1; then
  echo "Fetching and reset to origin/master..."
  git fetch --all && git reset --hard origin/master
else
  echo "Not a git repo, skip git fetch/reset."
fi

echo "Building Docker image: ${IMAGE_NAME}..."
docker build -t "${IMAGE_NAME}" .

echo "Stopping and removing existing container (if any)..."
if [ "$(docker ps -aq -f name=${CONTAINER_NAME})" ]; then
  docker rm -f "${CONTAINER_NAME}" >/dev/null 2>&1 || true
fi

mkdir -p "${HOST_DATA_DIR}"
echo "Data dir (host): ${HOST_DATA_DIR} -> container /app/backend/data"

# 生产仅读取 .env.prod（不读 .env，避免混用本地配置）
ENV_FILE=".env.prod"
if [ ! -f "${ENV_FILE}" ]; then
  if [ -f ".env.prod.example" ]; then
    echo "Creating ${ENV_FILE} from .env.prod.example ..."
    cp .env.prod.example "${ENV_FILE}"
    echo "Please edit ${ENV_FILE} with production values (e.g. CALLBACK_BASE_URL, API keys) and run $0 again."
    exit 1
  else
    echo "Error: ${ENV_FILE} and .env.prod.example not found. Cannot start production container."
    exit 1
  fi
fi
echo "Using env file: ${ENV_FILE}"

echo "Running container ${CONTAINER_NAME} (frontend :${PORT}, backend :${BACKEND_PORT})..."
docker run -d \
  --name "${CONTAINER_NAME}" \
  --env-file "${ENV_FILE}" \
  -p "${PORT}:3000" \
  -p "${BACKEND_PORT}:8000" \
  -v "${HOST_DATA_DIR}:/app/backend/data" \
  "${IMAGE_NAME}"

echo "Container started. Data persisted on host: ${HOST_DATA_DIR}"
echo "Frontend: http://localhost:${PORT}  |  Backend API: http://localhost:${BACKEND_PORT}  |  Health: curl http://localhost:${PORT}/health"