# Use an official Python runtime as a parent image
FROM python:3.10-slim-bullseye

# Set environment variables
ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
ENV PIP_NO_CACHE_DIR off
ENV PIP_DISABLE_PIP_VERSION_CHECK 1
ENV DEBIAN_FRONTEND=noninteractive

# Set the working directory in the container
WORKDIR /app

# Install system dependencies
# - ffmpeg for MoviePy audio/video processing
# - imagemagick for MoviePy TextClip and other image operations
# - git in case requirements.txt pulls from git repositories
# - fonts-dejavu-core and fonts-liberation for general font availability
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    imagemagick \
    git \
    fonts-dejavu-core \
    fonts-liberation \
    # Add any other system-level packages your app might need (e.g., build-essential if compiling C extensions)
    && rm -rf /var/lib/apt/lists/*

# Modify ImageMagick policy.xml to allow operations needed by MoviePy
# This is critical for TextClip and other ImageMagick-dependent features in MoviePy
# It attempts to find policy.xml for ImageMagick v6 or v7 and comments out restrictive lines.
RUN if [ -f /etc/ImageMagick-6/policy.xml ]; then \
        XML_FILE="/etc/ImageMagick-6/policy.xml"; \
        echo "INFO: Modifying ImageMagick policy at $XML_FILE (v6) for MoviePy compatibility." ; \
    elif [ -f /etc/ImageMagick-7/policy.xml ]; then \
        XML_FILE="/etc/ImageMagick-7/policy.xml"; \
        echo "INFO: Modifying ImageMagick policy at $XML_FILE (v7) for MoviePy compatibility." ; \
    else \
        XML_FILE=""; \
        echo "WARNING: ImageMagick policy.xml not found in expected /etc/ImageMagick-[67]/ locations. MoviePy TextClip might fail." ; \
    fi && \
    if [ -n "$XML_FILE" ] && [ -f "$XML_FILE" ]; then \
        sed -i 's/<policy domain="path" rights="none" pattern="@\*"\/>/<!-- <policy domain="path" rights="none" pattern="@\*" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="TEXT"\/>/<!-- <policy domain="coder" rights="none" pattern="TEXT" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="LABEL"\/>/<!-- <policy domain="coder" rights="none" pattern="LABEL" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="MVG"\/>/<!-- <policy domain="coder" rights="none" pattern="MVG" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="MSL"\/>/<!-- <policy domain="coder" rights="none" pattern="MSL" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="HTTPS"\/>/<!-- <policy domain="coder" rights="none" pattern="HTTPS" \/> -->/' "$XML_FILE" && \
        sed -i 's/<policy domain="coder" rights="none" pattern="HTTP"\/>/<!-- <policy domain="coder" rights="none" pattern="HTTP" \/> -->/' "$XML_FILE" && \
        echo "INFO: ImageMagick policy modifications attempted." ; \
    fi

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

# Install Python dependencies
RUN pip install --upgrade pip && \
    pip install -r requirements.txt

# Copy the rest of the application code into the container
COPY . .

# Create a directory for fonts if it doesn't exist and copy custom fonts
# This assumes your 'arial.ttf' (or other custom fonts) are in 'assets/fonts/' in your project
# Adjust the source path ('assets/fonts/arial.ttf') if your font is located elsewhere.
RUN mkdir -p /usr/local/share/fonts/truetype/mycustomfonts && \
    if [ -f assets/fonts/arial.ttf ]; then \
        cp assets/fonts/arial.ttf /usr/local/share/fonts/truetype/mycustomfonts/arial.ttf && \
        echo "INFO: Copied arial.ttf to custom font directory." ; \
    else \
        echo "WARNING: assets/fonts/arial.ttf not found. Ensure fonts are available for Pillow/MoviePy." ; \
    fi && \
    fc-cache -fv  # Update the system font cache

# Create the output directory for media and ensure it's writable
# The Hugging Face Spaces environment usually runs as 'appuser' (UID 1000)
RUN mkdir -p /app/temp_cinegen_media && chown -R 1000:1000 /app/temp_cinegen_media
# If running locally as root, this chown might not be strictly necessary,
# but it's good practice for environments that use a non-root user.

# Expose the port Streamlit runs on
EXPOSE 8501

# Define the command to run the application
# Use 0.0.0.0 to make the app accessible from outside the container
# The Hugging Face Spaces environment might override this CMD or provide its own startup script.
# For local Docker runs, this will be used.
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]