# Use the official Python image
FROM python:3.10-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PYTHONIOENCODING=utf-8
ENV PORT=8080

# Create app directory
WORKDIR /app

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

# Copy requirements first to leverage Docker cache
COPY requirements.txt /app/

# Install dependencies
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy rest of the application code
COPY . /app/

# Expose port for Cloud Run
EXPOSE 8080

# Command to run the Flask app
CMD ["gunicorn", "--bind", "0.0.0.0:8080", "--workers", "4", "--threads", "2", "--timeout", "0", "app:app"]