# Use an official Python runtime as a parent image
FROM python:3.11-slim

# Avoid interactive prompts
ENV DEBIAN_FRONTEND=noninteractive

# Install system dependencies required for audio/image processing
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    libsndfile1 \
    sox \
    libgl1 \
    libglib2.0-0 \
    build-essential \
    git \
    pkg-config \
    && rm -rf /var/lib/apt/lists/*

# Set the working directory in the container
WORKDIR /app

# Copy project files
COPY . /app

# Create writable cache/temp directories at build time so non-root processes
# (like the Spaces runtime user) can write to them. Make them world-writable
# to avoid UID/GID assumptions.
RUN mkdir -p /app/app_cache /app/app_tmp /app/speechbrain_cache /app/.cache/matplotlib \
    && chmod -R 0777 /app/app_cache /app/app_tmp /app/speechbrain_cache /app/.cache/matplotlib || true

# Make the entire /app directory writable so runtime processes (which may run
# as an unprivileged user inside Spaces) can create files directly under /app
# such as transcription_result.json. This is a pragmatic fix; see notes below
# for a safer alternative.
RUN chmod -R 0777 /app || true

# Ensure entrypoint script is executable
RUN chmod +x /app/scripts/entrypoint.sh

# Upgrade pip and wheel tooling
RUN python -m pip install --upgrade pip setuptools wheel

# Install numpy first (helps dependency resolution), then install PyTorch CPU wheels
# using the official PyTorch index and prefer-binary to avoid building from source.
# Use slim Python base and install PyTorch CPU wheels explicitly
RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Install numpy first (helps dependency resolution)
RUN pip install --no-cache-dir numpy==2.0.2

# Install torch (CPU) from PyTorch's CPU wheel index
# Then install torchaudio CPU wheel with --no-deps to avoid pip trying to
# re-resolve torch versions (we already installed torch).
RUN pip install --no-cache-dir --prefer-binary \
    -f https://download.pytorch.org/whl/cpu/torch_stable.html \
    "torch==2.8.0" "torchaudio==2.8.0"

# Install remaining Python dependencies at build-time so the image is self-contained
# and ready to run on HF Spaces. If pip fails due to transient network issues, retry once.
RUN pip install --no-cache-dir -r /app/requirements.txt || pip install --no-cache-dir -r /app/requirements.txt

# Expose the port that the app runs on
EXPOSE 7860

# Define environment variables
ENV PYTHONUNBUFFERED=1
ENV IN_DOCKER=1

ENTRYPOINT ["/app/scripts/entrypoint.sh"]