FROM python:3.12-slim

ENV DEBIAN_FRONTEND=noninteractive \
    PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# OS packages: Apache + curl
RUN apt-get update \
 && apt-get install -y --no-install-recommends apache2 curl \
 && rm -rf /var/lib/apt/lists/*

# Enable CGI and disable default /usr/lib/cgi-bin alias
RUN a2enmod cgid && a2disconf serve-cgi-bin || true

# Use /var/www/htdocs as DocumentRoot to match your layout
RUN mkdir -p /var/www/htdocs
WORKDIR /var/www/htdocs

# Copy app (including scenar package for imports)
COPY cgi-bin ./cgi-bin
COPY templates ./templates
COPY scenar ./scenar
COPY requirements.txt ./requirements.txt

# Ensure CGI scripts are executable
RUN find /var/www/htdocs/cgi-bin -type f -name "*.py" -exec chmod 0755 {} \;

# Writable tmp + kompatibilita s /scripts/tmp (skrypt nic neupravujeme)
RUN mkdir -p /var/www/htdocs/tmp \
    /var/www/htdocs/scripts/tmp \
 && chown -R www-data:www-data /var/www/htdocs/tmp /var/www/htdocs/scripts \
 && chmod 0775 /var/www/htdocs/tmp /var/www/htdocs/scripts/tmp

# --- Python dependencies (from requirements.txt) ---
RUN pip install --no-cache-dir -r requirements.txt

# Listen on 8080
RUN sed -ri 's/Listen 80/Listen 8080/g' /etc/apache2/ports.conf

# Vhost: enable CGI in DocumentRoot; index => scenar.py
RUN printf '%s\n' \
'<VirtualHost *:8080>' \
'    ServerName localhost' \
'    ServerAdmin webmaster@localhost' \
'    DocumentRoot /var/www/htdocs' \
'' \
'    <Directory /var/www/htdocs>' \
'        Options +ExecCGI -Indexes' \
'        AllowOverride None' \
'        Require all granted' \
'        AddHandler cgi-script .py' \
'        DirectoryIndex /cgi-bin/scenar.py' \
'    </Directory>' \
'' \
'    ErrorLog ${APACHE_LOG_DIR}/error.log' \
'    CustomLog ${APACHE_LOG_DIR}/access.log combined' \
'</VirtualHost>' \
> /etc/apache2/sites-available/000-default.conf

HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
  CMD curl -fsS http://127.0.0.1:8080/ >/dev/null || exit 1

EXPOSE 8080
CMD ["apachectl", "-D", "FOREGROUND"]