# ============================================================
# API Dockerfile - FastAPI 应用
# 优化：多阶段构建 + pip cache mount + 依赖分层缓存
# ============================================================

# ==================== Builder 阶段 ====================
FROM git.xiaoxiajianji.com/xiaoxia/base/python:3.12-slim AS builder

# 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

# 安装编译依赖（仅 builder 需要）
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# 创建虚拟环境
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

WORKDIR /tmp

# ---- 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 --mount=type=cache,target=/root/.cache/pip,sharing=locked \
    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 --mount=type=cache,target=/root/.cache/pip,sharing=locked \
    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

# ---- Python 依赖瘦身 ----
RUN find /opt/venv -name "*.so" -type f -exec strip --strip-all {} \; 2>/dev/null || true
RUN find /opt/venv -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null; \
    find /opt/venv -name "*.pyc" -delete 2>/dev/null || true

# ==================== Runtime 阶段 ====================
FROM git.xiaoxiajianji.com/xiaoxia/base/python:3.12-slim AS runtime

# 构建参数：版本号（CI 传入 commit hash）
ARG APP_VERSION=dev

# 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

# 只装运行时需要的库（libpq5 是 psycopg2 运行时依赖）
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    && rm -rf /var/lib/apt/lists/*

# 从 builder 复制虚拟环境
COPY --from=builder /opt/venv /opt/venv

# 设置工作目录
WORKDIR /app

# 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:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1
ENV APP_VERSION=$APP_VERSION

# 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"]