# Use Python 3.11 slim image as base
FROM python:3.11-slim

# ---- System setup ----
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    FFMPEG_BIN=/usr/bin/ffmpeg \
    FFPROBE_BIN=/usr/bin/ffprobe

# Set working directory
WORKDIR /app

# Install system dependencies (ffmpeg + curl for healthcheck, build tools for pip)
RUN apt-get update \
 && apt-get install -y --no-install-recommends \
      ffmpeg \
      curl \
      build-essential \
 && rm -rf /var/lib/apt/lists/*

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

# Install Python dependencies
RUN python -m pip install --upgrade pip \
 && pip install -r requirements.txt

# Copy application code
COPY . .

# Expose port
EXPOSE 8000

# Health check (uses curl we installed above)
HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
  CMD curl -fsS http://localhost:8000/health || exit 1

# Run the application (dev-friendly: --reload; change to gunicorn/uvicorn w/o reload for prod)
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]