# FlaskPaste Container Image (Multi-Stage Build)
# 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-slim AS builder

WORKDIR /build

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

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

# Install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt gunicorn


# Stage 2: Runtime image
FROM python:3.11-slim

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

# Create non-root user
RUN groupadd -r flaskpaste && useradd -r -g flaskpaste flaskpaste

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

# Set working directory
WORKDIR /app

# Copy only necessary application files
COPY app/ ./app/
COPY wsgi.py .
COPY fpaste .

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

# Switch to non-root user
USER flaskpaste

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

# Expose port
EXPOSE 5000

# Health check
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

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