# Use Python 3.11 slim image as base
FROM python:3.11-slim AS base

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Copy requirements first for better caching
COPY requirements.txt .

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

# Production stage
FROM python:3.11-slim AS production

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app

# Install curl for health check
RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*

# Create non-root user for security
RUN groupadd -r appuser && useradd -r -g appuser appuser

# Create app directory and output directory
WORKDIR /app
RUN mkdir -p /app/output && chown -R appuser:appuser /app

# Copy Python packages from base stage
COPY --from=base /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=base /usr/local/bin /usr/local/bin

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

# Install the package itself
USER root
RUN pip install -e .
USER appuser

# Expose Streamlit port
EXPOSE 8501

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8501/_stcore/health || exit 1

# Run Streamlit app
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0", "--server.headless=true", "--server.fileWatcherType=none", "--browser.gatherUsageStats=false"] 