# FlaskPaste Container Image (Alpine)
# Build: podman build -t flaskpaste .
# Run:   podman run -d -p 5000:5000 -v flaskpaste-data:/app/data flaskpaste

# Stage 1: Build dependencies
FROM python:3.11-alpine AS builder

WORKDIR /build

# Install build dependencies for compiled Python packages
RUN apk add --no-cache gcc musl-dev libffi-dev

# Create virtual environment and upgrade pip
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
RUN pip install --no-cache-dir --upgrade pip 'wheel>=0.46.2'

# Install Python dependencies (includes security pins from requirements.txt)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt gunicorn \
    && pip cache purge 2>/dev/null || true \
    && rm -rf /opt/venv/lib/python*/site-packages/setuptools/_vendor/jaraco*


# Stage 2: Alpine runtime (minimal)
FROM python:3.11-alpine

LABEL maintainer="FlaskPaste"
LABEL description="Minimal secure pastebin REST API"

# Apply security fixes to base image, remove vendored vulnerable packages
RUN pip install --no-cache-dir --upgrade pip 'wheel>=0.46.2' 'setuptools>=80.0' 'jaraco.context>=6.1.0' \
    && pip cache purge 2>/dev/null || true \
    && rm -rf /root/.cache /usr/local/lib/python*/site-packages/setuptools/_vendor/jaraco*

# Create non-root user
RUN addgroup -g 65532 -S flaskpaste && adduser -u 65532 -S -G flaskpaste flaskpaste

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

WORKDIR /app

# Copy application files
COPY --chown=65532:65532 app/ ./app/
COPY --chown=65532:65532 wsgi.py .
COPY --chown=65532:65532 fpaste .

# Create data directory
RUN mkdir -p /app/data && chown -R flaskpaste:flaskpaste /app

USER flaskpaste

# Environment configuration
ENV FLASK_ENV=production
ENV FLASKPASTE_DB=/app/data/pastes.db
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

EXPOSE 5000

HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5000/health')" || exit 1

CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "2", "--access-logfile", "-", "wsgi:application"]