FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    TRANSFORMERS_CACHE=/app/model_cache \
    HF_HOME=/app/.cache/huggingface \
    SENTENCE_TRANSFORMERS_HOME=/app/.cache/huggingface/sentence-transformers

# Create working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    ffmpeg libsndfile1 \
    ca-certificates curl dnsutils gcc openssl && \
    rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY requirements.txt .
RUN pip install --upgrade pip && pip install --no-cache-dir -r requirements.txt

# Create writable model cache directory and set correct ownership
RUN mkdir -p /app/model_cache /app/.cache/huggingface && \
    chown -R 1000:1000 /app/model_cache /app/.cache/huggingface

# Copy app source code
COPY . .

# Expose app port
EXPOSE 7860

# Run app
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "debug"]