# Multi-stage Dockerfile for FastAPI with uv
# Stage 1: Builder - Install dependencies with uv
FROM python:3.12-slim AS builder

# Install uv
COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv

# Set working directory
WORKDIR /app

# Set environment variables for uv and Python
ENV UV_COMPILE_BYTECODE=1
ENV UV_LINK_MODE=copy
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Copy dependency files
COPY requirements.txt ./

# Create virtual environment and install dependencies
RUN uv venv /opt/venv && \
    . /opt/venv/bin/activate && \
    uv pip install --no-cache -r requirements.txt

# Stage 2: Runner - Production image
FROM python:3.12-slim AS runner

# Set working directory
WORKDIR /app

# Create non-root user for security
RUN groupadd --gid 1001 appuser && \
    useradd --uid 1001 --gid 1001 --shell /bin/bash --create-home appuser

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PATH="/opt/venv/bin:$PATH"
ENV PYTHONPATH=/app

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv

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

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/health').read()" || exit 1

# Start the application with uvicorn
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "4"]