# ================================
# PrecisionVoice Dockerfile
# Optimized for performance and size
# ================================

# Stage 1: Builder
FROM python:3.10-slim-bullseye AS builder

WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    git \
    ffmpeg \
    libsndfile1-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements and install dependencies
# Using --user to keep packages in /root/.local
COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# ================================
# Stage 2: Runtime
# ================================
FROM python:3.10-slim-bullseye

WORKDIR /app

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

# Copy Python packages from builder
COPY --from=builder /root/.local /root/.local

# Ensure scripts in .local are available
ENV PATH=/root/.local/bin:$PATH
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# Model cache directories
ENV HF_HOME=/root/.cache/huggingface
ENV TORCH_HOME=/root/.cache/torch
ENV TRANSFORMERS_CACHE=/root/.cache/huggingface

# Copy application code
COPY app/ ./app/
COPY data/ ./data/

# Create necessary directories
RUN mkdir -p /app/data/uploads /app/data/processed

# Port configuration
ARG PORT=7860
ENV PORT=${PORT}
EXPOSE ${PORT}

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:${PORT}/api/health')" || exit 1

# Run the application
CMD ["sh", "-c", "uvicorn app.main:app --host 0.0.0.0 --port ${PORT}"]