FROM python:3.10-slim

# 系统依赖:ffmpeg 用于音频编解码/重采样,libsndfile 给 soundfile 用
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    libsndfile1 \
    git \
    curl \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# deepfilternet 依赖 deepfilterlib,PyPI 上没有预编译 wheel,
# 必须现场编译 Rust 扩展,所以这里装 Rust 工具链
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable
ENV PATH="/root/.cargo/bin:${PATH}"

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# 预下载 DeepFilterNet 模型权重,避免每次冷启动都下载
RUN python -c "from df.enhance import init_df; init_df()" || true

COPY . .

# HF Space 默认监听 7860
ENV GRADIO_SERVER_NAME=0.0.0.0
ENV GRADIO_SERVER_PORT=7860
ENV MODEL_DIR=/app/models

RUN mkdir -p /app/models /app/tmp

EXPOSE 7860

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