# -------------------------------------------------------------
# Build Stage
# -------------------------------------------------------------
FROM python:3.10-slim AS build

# Prevents Python from buffering stdout/stderr
ENV PYTHONUNBUFFERED=1

# Install system dependencies required for OCR + OpenCV
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgl1 \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Copy requirements
COPY requirements.txt .

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

# -------------------------------------------------------------
# Final Image Stage
# -------------------------------------------------------------
FROM python:3.10-slim

ENV PYTHONUNBUFFERED=1

RUN apt-get update && apt-get install -y --no-install-recommends \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgl1 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY --from=build /usr/local /usr/local

# Copy your FastAPI app
COPY app.py .

# Expose port 7860 (HuggingFace default)
EXPOSE 7860

# Start FastAPI server
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]