# ============================================================
# API Dockerfile - 专门用于 FastAPI 应用
# 优化：依赖分层缓存 + 多阶段构建基础层
# ============================================================

# 基础镜像：Python 3.12
FROM python:3.12-slim-bookworm

# 使用阿里云镜像加速
RUN sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || \
    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list 2>/dev/null || true

# 安装系统依赖
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# 设置工作目录
WORKDIR /app

# ---- 依赖分层：基础依赖（变化少，缓存命中率高）----
COPY requirements-base.txt /tmp/requirements-base.txt

RUN python -m venv /opt/venv \
    && /opt/venv/bin/pip install --no-cache-dir -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com -r /tmp/requirements-base.txt \
    && rm /tmp/requirements-base.txt

# ---- 依赖分层：业务依赖（变化频繁）----
COPY requirements.txt /tmp/requirements.txt

RUN /opt/venv/bin/pip install --no-cache-dir -i https://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com -r /tmp/requirements.txt \
    && rm /tmp/requirements.txt

# 复制应用代码
COPY apps/api/ /app/apps/api/
COPY packages/ /app/packages/
COPY alembic.ini /app/alembic.ini
COPY migrations/ /app/migrations/
COPY alembic/ /app/alembic/
COPY scripts/ /app/scripts/

# 设置环境变量
ENV PATH="/opt/venv/bin:$PATH"
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1

# 健康检查
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health', timeout=5)"

# API 入口点
WORKDIR /app/apps/api
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]