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

# Set environment variables for Python, pip, and locale
ENV PYTHONUNBUFFERED 1
ENV PYTHONDONTWRITEBYTECODE 1
ENV PIP_NO_CACHE_DIR off
ENV PIP_DISABLE_PIP_VERSION_CHECK 1
ENV DEBIAN_FRONTEND=noninteractive
ENV LANG C.UTF-8
ENV LC_ALL C.UTF-8

# Install system dependencies (as root)
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    imagemagick \
    git \
    fonts-dejavu-core \
    fonts-liberation \
    libgl1-mesa-glx \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

# Modify ImageMagick policy.xml (as root)
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 $XML_FILE (v7) for MoviePy compatibility." ; \
    else \
        XML_FILE=""; \
        echo "WARNING: ImageMagick policy.xml not found. MoviePy TextClip might fail." ; \
    fi && \
    if [ -n "$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 applied to $XML_FILE." ; \
    fi

# Create a non-root user and group, create home, .cache, and .streamlit dirs
RUN groupadd -r appgroup --gid 1000 && \
    useradd --no-log-init -r -g appgroup -u 1000 --create-home --shell /bin/bash appuser && \
    mkdir -p /home/appuser/.cache/pip && \
    mkdir -p /home/appuser/.streamlit && \
    chown -R appuser:appgroup /home/appuser

# Set Streamlit home directory (already created and chowned)
ENV STREAMLIT_HOME=/home/appuser/.streamlit

# Set the working directory in the container (owned by root initially, will be chowned)
WORKDIR /app

# Copy requirements.txt and install dependencies AS APPUSER
# First, copy just requirements.txt and chown its destination so appuser can write to /app (temporarily for this step)
COPY --chown=appuser:appgroup requirements.txt .
USER appuser
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --user --no-cache-dir -r requirements.txt # --user installs to ~/.local

# Add user's local bin to PATH
ENV PATH="/home/appuser/.local/bin:${PATH}"

# Copy the rest of the application code AS APPUSER
# WORKDIR /app is still in effect, appuser should have rights to write here if /app was chowned.
# However, to be absolutely safe, we copy to a location appuser definitely owns, or chown /app after copy by root.
# Let's stick to copying as root then chowning all of /app.

USER root
COPY . .
RUN chown -R appuser:appgroup /app

# Create runtime directories AS APPUSER (now that /app is owned by appuser)
USER appuser
RUN mkdir -p /app/temp_cinegen_media
RUN mkdir -p /app/assets/fonts # This directory should exist from COPY, but ensure it.

# Copy custom fonts to system location (as root, if needed by MoviePy's ImageMagick backend directly)
# This step is optional if Pillow direct font path loading is sufficient.
# USER root
# RUN if [ -d "/app/assets/fonts" ] && [ "$(ls -A /app/assets/fonts)" ]; then \
#         mkdir -p /usr/local/share/fonts/truetype/cinegen_custom && \
#         cp /app/assets/fonts/*.*tf /usr/local/share/fonts/truetype/cinegen_custom/ 2>/dev/null || true && \
#         fc-cache -fv && \
#         echo "INFO: Copied custom fonts and refreshed font cache (as root)."; \
#     else \
#         echo "INFO: No custom fonts found in /app/assets/fonts to copy system-wide." ; \
#     fi
# USER appuser # Switch back to appuser for runtime

# Expose the port Streamlit runs on
EXPOSE 8501

# Define the command to run the application
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0", "--global.sharingMode=off", "--client.gatherUsageStats=false"]