# Dockerfile for AIServ
# 使用 Python 3.11（稳定兼容）
FROM python:3.11-slim

# 设置环境变量
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PYTHONPATH=/app  
#添加项目根目录到Python路径

WORKDIR /app

# 1. 安装系统依赖
# PyTorch和sentence-transformers需要编译工具
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    git \
    curl \
    && rm -rf /var/lib/apt/lists/*

# 2. 复制依赖文件并安装
COPY requirements.txt .

# 分开安装以避免依赖冲突
# 2.1 先安装PyTorch（指定CPU版本）
RUN pip install --no-cache-dir \
    torch==2.8.0 \
    --index-url https://download.pytorch.org/whl/cpu

# 2.2 安装NumPy
RUN pip install --no-cache-dir numpy==2.2.6

# 2.3 安装其他依赖
RUN pip install --no-cache-dir \
    flask==3.1.2 \
    flask-cors==6.0.1 \
    scikit-learn==1.7.2 \
    sentence-transformers==5.1.1 \
    joblib==1.5.2 \
    cachetools==6.2.1

# 3. 验证关键包安装成功
RUN python -c "import torch; print(f'✓ PyTorch {torch.__version__} installed')" && \
    python -c "import numpy; print(f'✓ NumPy {numpy.__version__} installed')" && \
    python -c "import flask; print(f'✓ Flask {flask.__version__} installed')" && \
    python -c "from sentence_transformers import SentenceTransformer; print('✓ sentence-transformers installed')"

# 4. 复制应用代码
# 注意：logs/目录不需要复制，运行时生成
COPY app.py .
COPY api/ ./api/
COPY models/ ./models/
COPY services/ ./services/
COPY utils/ ./utils/

# 5. 验证模型文件是否存在
RUN if [ -d "models/bin/all-MiniLM-L6-v2" ]; then \
        echo "✓ Model files found: models/bin/all-MiniLM-L6-v2"; \
        ls -la models/bin/all-MiniLM-L6-v2/ | head -5; \
    else \
        echo "⚠ Warning: Model directory not found"; \
    fi

# 6. 创建非root用户（安全最佳实践）
RUN useradd -m -u 1000 appuser && \
    chown -R appuser:appuser /app
USER appuser

# 7. 创建日志目录（确保有写入权限）
RUN mkdir -p /app/logs && chmod 755 /app/logs

# 8. 暴露端口（Flask默认5000）
EXPOSE 5000

# 9. 健康检查（可选）
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:5000/health', timeout=5)" 2>/dev/null || exit 1

# 10. 启动应用
CMD ["python", "app.py"]