FROM python:3.11-slim AS base

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    HF_HOME=/app/.cache/huggingface \
    TRANSFORMERS_CACHE=/app/.cache/huggingface

WORKDIR /app

# System deps for soundfile / librosa (libsndfile + ffmpeg for mp3/ogg).
RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        libsndfile1 \
        ffmpeg \
        curl \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt /app/requirements.txt
RUN pip install --upgrade pip \
 && pip install -r /app/requirements.txt

COPY app /app/app
COPY checkpoints /app/checkpoints

# Pre-create writable dirs
RUN mkdir -p /app/tmp_uploads /app/.cache/huggingface

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=10s --start-period=20s --retries=3 \
  CMD curl -fsS http://localhost:8000/api/health || exit 1

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]