# Build stage
FROM python:3.11-slim as builder

WORKDIR /build

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

# Install Python dependencies
COPY pyproject.toml .
RUN pip install --no-cache-dir --user -e ".[dev]"

# Production stage
FROM python:3.11-slim

# Create non-root user and add to docker group
RUN groupadd -r appgroup && useradd -r -g appgroup appuser \
    && groupadd -r docker || true \
    && usermod -aG docker appuser

WORKDIR /app

# Install runtime dependencies including Docker CLI
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    git \
    netcat-openbsd \
    ca-certificates \
    curl \
    gnupg \
    && install -m 0755 -d /etc/apt/keyrings \
    && curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg \
    && chmod a+r /etc/apt/keyrings/docker.gpg \
    && echo "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
    "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" > /etc/apt/sources.list.d/docker.list \
    && apt-get update \
    && apt-get install -y --no-install-recommends docker-ce-cli docker-compose-plugin \
    && curl -L --output /usr/local/bin/cloudflared https://github.com/cloudflare/cloudflared/releases/latest/download/cloudflared-linux-amd64 \
    && chmod +x /usr/local/bin/cloudflared \
    && rm -rf /var/lib/apt/lists/*

# Copy dependencies from builder
COPY --from=builder /root/.local /root/.local
ENV PATH=/root/.local/bin:$PATH

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

# Create directories for repo and instance storage
RUN mkdir -p /data/repos /data/instances && chown -R appuser:appgroup /data

# Copy wait-for-db script
COPY wait-for-db.sh /usr/local/bin/wait-for-db.sh
RUN chmod +x /usr/local/bin/wait-for-db.sh

# NOTE: Running as root to access Docker socket for managing tool instances
# This is required because Docker socket permissions require root or docker group membership
# which doesn't work well across container boundaries.
# Consider using Docker-in-Docker or rootless Docker for production hardening.

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')" || exit 1

# Run the application (with database wait)
ENTRYPOINT ["/usr/local/bin/wait-for-db.sh"]
CMD ["uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "8000"]