# Dockerfile for Gait Analysis Microservice
FROM python:3.10-slim

# Install system dependencies required by OpenCV and YOLO
RUN apt-get update && apt-get install -y \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgl1 \
    git \
    && rm -rf /var/lib/apt/lists/*

# Set the working directory in the container
WORKDIR /app

# Copy the requirements file into the container
COPY requirements.txt .

# Install ALL Python dependencies in a single layer for efficiency
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the backend files into the container
COPY . /app

# ---- Download YOLO model at BUILD time ----
# This avoids a cold-start penalty on every container restart.
# The model (~6 MB) is baked into the image layer.
RUN python download_model.py

# HuggingFace Spaces requires the app to run as a non-root user
RUN useradd -m -u 1000 appuser && chown -R appuser /app
USER appuser

# Expose the port that HuggingFace Spaces routes to
EXPOSE 7860

# Command to run the application using Uvicorn
CMD ["uvicorn", "api:app", "--host", "0.0.0.0", "--port", "7860"]