# 环境变量配置示例

复制以下内容到 `.env` 文件中：

```bash
# ===========================================
# AI Clinical Research Platform - 环境变量配置
# ===========================================

# ==================== 应用配置 ====================
NODE_ENV=development
PORT=3001
HOST=0.0.0.0
LOG_LEVEL=debug
SERVICE_NAME=aiclinical-backend

# ==================== 数据库配置 ====================
DATABASE_URL=postgresql://postgres:postgres@localhost:5432/ai_clinical

# ==================== 存储配置 ====================
# 存储类型：local | oss
STORAGE_TYPE=local

# --- 本地存储配置（STORAGE_TYPE=local）---
LOCAL_STORAGE_DIR=uploads
LOCAL_STORAGE_URL=http://localhost:3001/uploads

# --- 阿里云OSS配置（STORAGE_TYPE=oss）---
# OSS_REGION=oss-cn-beijing
# OSS_BUCKET=ai-clinical-data-dev
# OSS_BUCKET_STATIC=ai-clinical-static-dev
# OSS_ACCESS_KEY_ID=your-access-key-id
# OSS_ACCESS_KEY_SECRET=your-access-key-secret
# OSS_INTERNAL=false
# OSS_SIGNED_URL_EXPIRES=3600

# ==================== 安全配置 ====================
JWT_SECRET=your-secret-key-change-in-production
JWT_EXPIRES_IN=7d
CORS_ORIGIN=http://localhost:5173

# ==================== LLM API配置 ====================
DEEPSEEK_API_KEY=
DEEPSEEK_BASE_URL=https://api.deepseek.com
DASHSCOPE_API_KEY=
GEMINI_API_KEY=

# ==================== 文件上传配置 ====================
UPLOAD_MAX_SIZE=31457280
```

## OSS 开发环境配置

如果要测试 OSS，将 `STORAGE_TYPE` 改为 `oss` 并填写以下配置：

```bash
STORAGE_TYPE=oss
OSS_REGION=oss-cn-beijing
OSS_BUCKET=ai-clinical-data-dev
OSS_BUCKET_STATIC=ai-clinical-static-dev
OSS_ACCESS_KEY_ID=LTAI5tBHkL39GjdLfcr77Y3f
OSS_ACCESS_KEY_SECRET=<从安全渠道获取>
OSS_INTERNAL=false
OSS_SIGNED_URL_EXPIRES=3600
```

## OSS 生产环境配置（SAE）

```bash
STORAGE_TYPE=oss
OSS_REGION=oss-cn-beijing
OSS_BUCKET=ai-clinical-data
OSS_BUCKET_STATIC=ai-clinical-static
OSS_ACCESS_KEY_ID=LTAI5tBHkL39GjdLfcr77Y3f
OSS_ACCESS_KEY_SECRET=<从安全渠道获取>
OSS_INTERNAL=true  # 🔴 生产必须用内网
OSS_SIGNED_URL_EXPIRES=3600
```