FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app \
    PORT=8000 \
    WORKERS=2

WORKDIR /app

RUN apt-get update \
    && apt-get install -y --no-install-recommends curl \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt ./
RUN pip install --no-cache-dir --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt

COPY . ./

RUN mkdir -p /app/servers /app/data /app/logs \
    && ([ -f /app/users.json ] || echo '{}' > /app/users.json) \
    && ([ -f /app/tickets.json ] || echo '{}' > /app/tickets.json)

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=10s --start-period=20s --retries=3 \
  CMD curl -fsS "http://localhost:${PORT}/health" || exit 1

CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port ${PORT:-8000} --workers ${WORKERS:-2}"]