FROM nvidia/cuda:12.9.0-runtime-ubuntu24.04

# Avoid interactive prompts during package installation
ENV DEBIAN_FRONTEND=noninteractive

# Install Python and system dependencies. ffmpeg/libsndfile1 for audio I/O (torchcodec/librosa).
# git is handy for any source deps.
RUN apt-get update && apt-get install -y --no-install-recommends \
    python3 \
    python3-pip \
    python3-dev \
    git \
    libsndfile1 \
    ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# Set Python alias (Ubuntu 24.04 ships Python 3.12)
RUN ln -sf /usr/bin/python3 /usr/bin/python
ENV PIP_BREAK_SYSTEM_PACKAGES=1

WORKDIR /app

# Install PyTorch (cu128 wheels). MOSS-TTS's [torch-runtime] extra pins torch 2.9.1 + torchcodec.
RUN pip install --no-cache-dir \
    torch==2.9.1 \
    torchaudio==2.9.1 \
    torchcodec==0.8.1 \
    --index-url https://download.pytorch.org/whl/cu128

# Runtime deps for the MOSS-TTS remote code (loaded via trust_remote_code). transformers MUST
# be 5.0.0 (the remote processor/generate target the 5.x API). The model + its modeling/processing
# code are downloaded from the HF hub at load time into the mounted cache.
RUN pip install --no-cache-dir \
    "transformers==5.0.0" \
    "accelerate>=1.10.1" \
    safetensors==0.6.2 \
    numpy==2.1.0 \
    orjson==3.11.4 \
    einops==0.8.1 \
    scipy==1.16.2 \
    librosa==0.11.0 \
    tiktoken==0.12.0 \
    soundfile \
    datasets \
    tqdm

# Copy the full repository
COPY . /app

# Default entrypoint
ENTRYPOINT ["bash"]

# Keep-alive CMD so the Space runtime stays healthy; `docker run` overrides it.
EXPOSE 7860
CMD ["-c", "python3 -m http.server 7860"]