# Multi-stage build for Gatehouse Auth API
# Build stage
FROM python:3.11-slim as builder

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy requirements files
WORKDIR /app
COPY requirements/base.txt requirements/base.txt
COPY requirements/production.txt requirements/production.txt

# Install dependencies
# Upgrade build tooling too: clears CVE-2026-24049 (wheel) and CVE-2026-23949 (jaraco.context)
RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
    pip install --no-cache-dir -r requirements/production.txt

# Production stage
FROM python:3.11-slim

# Install runtime dependencies
# apt-get upgrade pulls patched openssl/openssh/etc. so the image isn't pinned to
# whatever was current when the base layer was published.
# curl intentionally omitted: it was only used by HEALTHCHECK (now a stdlib Python
# check), and dropping it removes libcurl4t64 + libssh2 and their unfixed CVEs.
# NOTE: openssh-client retained for SSH CA workflows; drop it too if nothing shells
# out to ssh/scp (sshkey-tools signing is pure Python).
RUN apt-get update && apt-get upgrade -y && apt-get install -y --no-install-recommends \
    libpq5 \
    openssh-client \
    && rm -rf /var/lib/apt/lists/*

# Patch the base image's system-level build tooling that Trivy flags in
# /usr/local site-packages: wheel (CVE-2026-24049) and the jaraco.context
# (CVE-2026-23949) vendored by setuptools. Runs against system pip before the
# venv takes over PATH below.
RUN pip install --no-cache-dir --upgrade pip setuptools wheel

# Create non-root user
RUN groupadd --gid 1000 appgroup && \
    useradd --uid 1000 --gid appgroup --shell /bin/bash --create-home appuser

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy application code
WORKDIR /app
COPY --chown=appuser:appgroup . .

# Create log and session directories
RUN mkdir -p /app/logs /app/flask_session && chown -R appuser:appgroup /app/logs /app/flask_session

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 5000

# Health check (stdlib urllib — avoids shipping curl)
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD ["python", "-c", "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://localhost:5000/api/health', timeout=5).getcode()==200 else 1)"]

# Run gunicorn with gevent workers
CMD ["gunicorn", "--bind", "0.0.0.0:5000", \
     "--workers", "4", \
     "--worker-class", "gevent", \
     "--worker-connections", "1000", \
     "--timeout", "120", \
     "--access-logfile", "-", \
     "--error-logfile", "-", \
     "--log-level", "info", \
     "wsgi:application"]