# Multi-stage build for optimized Docker image
FROM python:3.10-slim AS builder

WORKDIR /app

# Install only essential build dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    libffi-dev \
    python3-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy and install Python dependencies
COPY requirements.optimized.txt .
RUN --mount=type=cache,target=/root/.cache/pip \
    pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.optimized.txt

# Production stage
FROM python:3.10-slim

WORKDIR /app

# Install only runtime dependencies (much smaller)
RUN apt-get update && apt-get install -y \
    poppler-utils \
    libgl1-mesa-glx \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender1 \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Copy Python packages and binaries from builder
COPY --from=builder /usr/local/lib/python3.10/site-packages/ /usr/local/lib/python3.10/site-packages/
COPY --from=builder /usr/local/bin/ /usr/local/bin/

# (Optional) Reinstall uvicorn in the final image to guarantee it's available
RUN pip install --no-cache-dir uvicorn

# Copy only necessary application files
COPY app.py .
COPY OCR.py .
COPY Feedback.py .
COPY PDFFeedbackGenerator.py .
COPY OCRAccuracyAnalyzer.py .

# Create necessary directories
RUN mkdir -p temp output

# Set environment variables
ENV POPPLER_PATH=/usr/bin
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1

EXPOSE 5000

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "5000"]