FROM python:3.10-slim

# Install system dependencies for High-Fidelity OpenCV
RUN apt-get update && apt-get install -y \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    ffmpeg \
    tzdata \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Set Timezone to IST (Indian Standard Time)
ENV TZ=Asia/Kolkata
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

# Install Full Accuracy Stack (YOLOv8 + Torch CPU)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# YOLOv8 Warmup & Config (Bake into image to solve startup & permissions)
ENV YOLO_CONFIG_DIR=/app/yolo_config
RUN mkdir -p $YOLO_CONFIG_DIR \
    && python -c "from ultralytics import YOLO; YOLO('yolov8n.pt'); YOLO('yolov8s.pt')" \
    && chmod -R 777 $YOLO_CONFIG_DIR

# Copy backend code
COPY . .

# Environment Defaults
ENV FLASK_APP=app.py
ENV DEPLOYMENT_ENV=production

EXPOSE 7860

# Production-grade runner
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--timeout", "120", "--workers", "1", "app:app"]