# ============================================================
# Worker Dockerfile - 分层缓存优化版
# 优化：基础依赖 + Worker大包预构建为基础镜像，业务构建仅叠加业务依赖
# 基础镜像：worker-base-builder / worker-base-runtime
# ============================================================

# ==================== Builder 阶段 ====================
# 从预构建的builder基础镜像开始，已经包含：
#   - 编译工具 (gcc/g++/python3-dev/binutils)
#   - requirements-base.txt 全部依赖
#   - requirements-worker.txt 全部依赖 (numpy/scipy/opencv)
#   - 预strip的.so文件
FROM xiaoxia-registry.cn-hangzhou.cr.aliyuncs.com/xiaoxiakeji/worker-base-builder:latest AS builder

ENV PATH="/opt/venv/bin:$PATH"

WORKDIR /tmp

# ---- 安装业务依赖（变化频繁，单独一层）----
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

# ---- 增量瘦身（清理新增业务依赖的冗余文件）----
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 ====================
# 从预构建的runtime基础镜像开始，已经包含：
#   - ffmpeg
#   - libglib2.0-0
FROM xiaoxia-registry.cn-hangzhou.cr.aliyuncs.com/xiaoxiakeji/worker-base-runtime:latest AS runtime

# 构建参数：版本号
ARG APP_VERSION=dev

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

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

# 创建非 root 用户（极少变化，放最前）
RUN groupadd -r celery \
    && useradd -r -g celery -d /app -s /sbin/nologin celery \
    && mkdir -p /app/generated \
    && chown celery:celery /app/generated

WORKDIR /app

# 复制文件按变化频率从低到高排序，最大化层缓存命中
COPY alembic.ini /app/alembic.ini
COPY migrations/ /app/migrations/
COPY packages/ /app/packages/
COPY apps/api/app/config.py /app/apps/api/app/config.py
COPY apps/api/app/core/ /app/apps/api/app/core/

# 复制 Worker 启动脚本
COPY infra/docker/entrypoint-worker.sh /usr/local/bin/entrypoint-worker.sh
RUN chmod +x /usr/local/bin/entrypoint-worker.sh

# 业务代码（变化最频繁，放最后）
COPY apps/worker/ /app/apps/worker/

USER celery

# Worker 入口点
WORKDIR /app/apps/worker
CMD ["/usr/local/bin/entrypoint-worker.sh"]