# ============================================
# AudioForge Backend - Production Dockerfile
# ============================================
# Multi-stage build for optimized image size
# Includes health checks and security best practices

FROM python:3.11-slim AS base

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# ============================================
# Builder Stage
# ============================================
FROM base AS builder

WORKDIR /build

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

# Copy dependency files
COPY pyproject.toml ./

# Install dependencies
RUN pip install --no-cache-dir uv && \
    uv pip install --system -e ".[dev]"

# ============================================
# Runtime Stage
# ============================================
FROM base AS runtime

WORKDIR /app

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

# Copy Python packages from builder
COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Create non-root user for security
RUN groupadd -r audioforge && \
    useradd -r -g audioforge -u 1000 audioforge && \
    mkdir -p /app/storage/audio/{music,vocals,mixed,mastered} && \
    chown -R audioforge:audioforge /app

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

# Switch to non-root user
USER audioforge

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

# Expose port
EXPOSE 8000

# Labels for metadata
LABEL maintainer="AudioForge Team" \
      version="1.0.0" \
      description="AudioForge Backend API - Production Ready" \
      org.opencontainers.image.source="https://github.com/audioforge/audioforge"

# Run application with production settings
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "4", "--log-level", "info"]