FROM python:3.12-slim

# System deps for your libraries + building C extensions
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    ffmpeg \
    libsndfile1 \
    mecab \
    libmecab2 \
    mecab-ipadic-utf8 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# 1) Install Python deps from requirements
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 2) Install Cython so we can compile the extension
RUN pip install --no-cache-dir "Cython>=3.0.0"

# 3) Copy the rest of the project
COPY . .

# 4) Build the local monotonic_align extension *in place*
#    This will create a linux/arm64 + CPython 3.12 .so under monotonic_align/monotonic_align/
RUN cd monotonic_align && python setup.py build_ext --inplace

# Optional: reduce CPU thread explosion from numpy/torch
ENV OMP_NUM_THREADS=4

EXPOSE 18343
ENV PORT=18343

CMD ["python", "app.py"]