# =============================================================================
# VoiceAuth API Dockerfile
# =============================================================================
# Multi-stage build for optimized production image

# -----------------------------------------------------------------------------
# Stage 1: Builder
# -----------------------------------------------------------------------------
FROM python:3.11-slim AS builder

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

# Create virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# -----------------------------------------------------------------------------
# Stage 2: Production
# -----------------------------------------------------------------------------
FROM python:3.11-slim AS production

# Install runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    libsndfile1 \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN useradd --create-home --uid 1000 appuser

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

# Set working directory
WORKDIR /app

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

# Create directories for models and logs
RUN mkdir -p /app/models /app/logs && \
    chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=7860

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD curl -f http://localhost:7860/api/health || exit 1

# Run application
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]