FROM python:3.10-slim

# Set the working directory
WORKDIR /app

# Install system dependencies required for OpenCV, git, and SAM 2
RUN apt-get update && apt-get install -y \
    build-essential \
    git \
    wget \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements file first to leverage Docker cache
COPY requirements.txt .

# Install pip upgrades and build tools before requirements
RUN pip install --no-cache-dir --upgrade pip setuptools wheel ninja

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

# Hugging Face Spaces require running as a non-root user with UID 1000
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Change working directory to the user's home
WORKDIR $HOME/app

# Copy the rest of the application code
COPY --chown=user . $HOME/app

# Run the download models script during the build
RUN python download_models.py

# Create output directories with correct permissions
RUN mkdir -p uploads static/crops templates static/css static/js && chmod 777 uploads static/crops

# Auto-fix: If files were uploaded directly to the root, move them to their correct folders
RUN mv index.html templates/ 2>/dev/null || true && \
    mv styles.css static/css/ 2>/dev/null || true && \
    mv main.js static/js/ 2>/dev/null || true

# Expose the default port for Hugging Face Spaces
EXPOSE 7860

# Run the Flask app directly so background threads work correctly with global state
CMD ["python", "app.py"]