# Stage 1: Build stage
FROM python:3.12-slim as builder

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/root/.local/bin:$PATH"

# Install system dependencies (curl and ca-certificates for uv installer)
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Install uv using the official installer
RUN curl -sSfL https://astral.sh/uv/install.sh | sh

# Verify uv is installed and available
RUN uv --version

# Create a non-root user
RUN useradd -m -u 1000 user

# Set the working directory
WORKDIR /app

# Create a virtual environment
RUN uv venv /opt/venv

# Update PATH to include the virtual environment's bin directory
ENV PATH="/opt/venv/bin:$PATH"

# Copy only the requirements file first to leverage Docker cache
COPY --chown=user ./requirements.txt /app/requirements.txt

# Install dependencies into the virtual environment using uv
RUN uv pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code
COPY --chown=user . /app

# Stage 2: Runtime stage
FROM python:3.12-slim

# Create a non-root user
RUN useradd -m -u 1000 user
USER user

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

# Set the working directory
WORKDIR /app

# Copy the virtual environment from the builder stage
COPY --from=builder --chown=user /opt/venv /opt/venv

# Copy only the necessary files from the builder stage
COPY --from=builder --chown=user /app /app

# Expose the port the app runs on
EXPOSE 7860

# Health check to ensure the application is running
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Command to run the application with hot reloading
CMD ["uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "7860", "--reload"]