# DocProcesser Dockerfile - Production optimized
# Ultra-lean multi-stage build for PPDocLayoutV3
# Final image: ~3GB (from 17GB)

# =============================================================================
# STAGE 1: Builder
# =============================================================================
FROM nvidia/cuda:12.9.0-devel-ubuntu24.04 AS builder

# Install build dependencies (deadsnakes PPA required for python3.10 on Ubuntu 24.04)
RUN apt-get update && apt-get install -y --no-install-recommends \
    software-properties-common \
    && add-apt-repository -y ppa:deadsnakes/ppa \
    && apt-get update && apt-get install -y --no-install-recommends \
    python3.10 python3.10-venv python3.10-dev python3.10-distutils \
    build-essential curl \
    && rm -rf /var/lib/apt/lists/*

# Setup Python
RUN ln -sf /usr/bin/python3.10 /usr/bin/python && \
    curl -sS https://bootstrap.pypa.io/get-pip.py | python

# Install uv
RUN pip install uv -i https://pypi.tuna.tsinghua.edu.cn/simple

WORKDIR /build

# Copy dependencies
COPY pyproject.toml ./
COPY wheels/ ./wheels/

# Build venv
RUN uv venv /build/venv --python python3.10 && \
    . /build/venv/bin/activate && \
    uv pip install -i https://pypi.tuna.tsinghua.edu.cn/simple -e . && \
    rm -rf ./wheels

# Aggressive optimization: strip debug symbols from .so files (~300-800MB saved)
RUN find /build/venv -name "*.so" -exec strip --strip-unneeded {} + || true

# Remove paddle C++ headers (~22MB saved)
RUN rm -rf /build/venv/lib/python*/site-packages/paddle/include

# Clean Python cache and build artifacts
RUN find /build/venv -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true && \
    find /build/venv -type f -name "*.pyc" -delete && \
    find /build/venv -type f -name "*.pyo" -delete && \
    find /build/venv -type d -name "tests" -exec rm -rf {} + 2>/dev/null || true && \
    find /build/venv -type d -name "test" -exec rm -rf {} + 2>/dev/null || true && \
    rm -rf /build/venv/lib/*/site-packages/pip* \
    /build/venv/lib/*/site-packages/setuptools* \
    /build/venv/include \
    /build/venv/share && \
    rm -rf /root/.cache 2>/dev/null || true

# =============================================================================
# STAGE 2: Runtime - CUDA base (~400MB, not ~3.4GB from runtime)
# =============================================================================
FROM nvidia/cuda:12.9.0-base-ubuntu24.04

ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    MODELSCOPE_CACHE=/root/.cache/modelscope \
    HF_HOME=/root/.cache/huggingface \
    PP_DOCLAYOUT_MODEL_DIR=/root/.cache/modelscope/hub/models/PaddlePaddle/PP-DocLayoutV2 \
    PADDLEOCR_VL_URL=http://127.0.0.1:8001/v1 \
    PATH="/app/.venv/bin:$PATH" \
    VIRTUAL_ENV="/app/.venv"

WORKDIR /app

# Minimal runtime dependencies (deadsnakes PPA required for python3.10 on Ubuntu 24.04)
RUN apt-get update && apt-get install -y --no-install-recommends \
    software-properties-common \
    && add-apt-repository -y ppa:deadsnakes/ppa \
    && apt-get update && apt-get install -y --no-install-recommends \
    python3.10 \
    libgl1 libglib2.0-0 libgomp1 \
    curl pandoc \
    && rm -rf /var/lib/apt/lists/*

RUN ln -sf /usr/bin/python3.10 /usr/bin/python

# Copy optimized venv from builder
COPY --from=builder /build/venv /app/.venv

# Copy app code
COPY app/ ./app/

# Create cache mount points (DO NOT include model files)
RUN mkdir -p /root/.cache/modelscope /root/.cache/huggingface /root/.paddlex && \
    rm -rf /app/app/model/*

EXPOSE 8053

HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8053/health || exit 1

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8053", "--workers", "1"]

# =============================================================================
# Usage: Mount local model cache to avoid downloading
#
# Option 1: Use host network (simplest, can access localhost services)
# docker run --gpus all --network host \
#   -v /home/yoge/.paddlex:/root/.paddlex:ro \
#   -v /home/yoge/.cache/modelscope:/root/.cache/modelscope:ro \
#   -v /home/yoge/.cache/huggingface:/root/.cache/huggingface:ro \
#   doc_processer:latest
#
# Option 2: Use bridge network with host.docker.internal (Linux needs --add-host)
# docker run --gpus all -p 8053:8053 \
#   --add-host=host.docker.internal:host-gateway \
#   -v /home/yoge/.paddlex:/root/.paddlex:ro \
#   -v /home/yoge/.cache/modelscope:/root/.cache/modelscope:ro \
#   -v /home/yoge/.cache/huggingface:/root/.cache/huggingface:ro \
#   doc_processer:latest
# =============================================================================