FROM python:3.10-slim

# System deps:
#   ffmpeg      — Whisper audio processing
#   libsndfile1 — soundfile (MMS TTS WAV I/O)
#   git         — pip install from GitHub (OpenVoice v2)
#   build-essential — some torch/audio wheels need gcc
RUN apt-get update && apt-get install -y \
    ffmpeg \
    espeak-ng \
    libsndfile1 \
    git \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install Python deps first (layer-caches before code copy)
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip setuptools wheel \
    && pip install --no-cache-dir \
        torch==2.2.2+cpu \
        --index-url https://download.pytorch.org/whl/cpu \
    && pip install --no-cache-dir -r requirements.txt \
    && pip install --no-cache-dir --no-deps \
        git+https://github.com/myshell-ai/OpenVoice.git

# Copy app code + model checkpoints
COPY . .

# HuggingFace model cache lives here — keeps re-downloads fast across builds
ENV HF_HOME=/app/.cache/huggingface

# HuggingFace Spaces Docker requires port 7860
EXPOSE 7860

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]