# Document Translation API - Backend Dockerfile
# Multi-stage build for optimized production image

FROM python:3.12-slim AS builder

WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libmagic1 \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .

# Create virtual environment and install dependencies
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Production stage
FROM python:3.12-slim AS production

WORKDIR /app

# Install runtime dependencies + LibreOffice headless (required for DOCX→PDF)
RUN apt-get update && apt-get install -y --no-install-recommends \
    libmagic1 \
    libpq5 \
    curl \
    fonts-noto \
    fonts-noto-cjk \
    fonts-noto-cjk-extra \
    libreoffice-writer-nogui \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Create non-root user with a proper home directory (LibreOffice needs it)
RUN groupadd -r translator && \
    useradd -r -g translator -m -d /home/translator translator && \
    mkdir -p /home/translator/.cache && \
    chown -R translator:translator /home/translator

# Create necessary directories
RUN mkdir -p /app/uploads /app/outputs /app/logs /app/temp \
    && chown -R translator:translator /app

# Copy application code
COPY --chown=translator:translator . .

# Make entrypoint executable
RUN chmod +x docker/backend/entrypoint.sh

# Switch to non-root user
USER translator

# Environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=8000 \
    WORKERS=4

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
    CMD curl -f http://localhost:${PORT}/health || exit 1

# Expose port
EXPOSE ${PORT}

# Use entrypoint script to handle migrations and startup
ENTRYPOINT ["docker/backend/entrypoint.sh"]
