FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1
WORKDIR /app

# Install system deps required by numpy/pandas/matplotlib and building wheels
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    gcc \
    gfortran \
    libatlas3-base \
    libopenblas-dev \
    liblapack-dev \
    libfreetype6-dev \
    libpng-dev \
    pkg-config \
    ca-certificates \
    curl \
    git \
    libglib2.0-0 \
    libxrender1 \
    libxext6 \
    libsm6 \
    && rm -rf /var/lib/apt/lists/*

# Copy only requirements first for better layer caching
COPY requirements.txt /app/requirements.txt

# Upgrade pip and install python deps
RUN python -m pip install --upgrade pip setuptools wheel && \
    python -m pip install -r /app/requirements.txt

# Copy project
COPY . /app

# Ensure Python and dynamic linker will find the native libs if mounted
ENV PYTHONPATH="/app:/app/IPM_SO:/app/IPM_DLL"
ENV LD_LIBRARY_PATH="/app/IPM_SO:/app/IPM_DLL"

EXPOSE 8001

# Default command runs uvicorn (use docker-compose override for development)
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8001"]