# syntax=docker/dockerfile:1

# ---- Build stage -------------------------------------------------------------
# Uses the uv image to resolve and install the pinned dependency set into a
# self-contained virtual environment.
FROM ghcr.io/astral-sh/uv:python3.13-alpine3.23 AS builder

ENV UV_COMPILE_BYTECODE=1 \
    UV_LINK_MODE=copy \
    UV_PYTHON_DOWNLOADS=never

WORKDIR /app

# Dependencies first: this layer only rebuilds when pyproject.toml/uv.lock change.
COPY pyproject.toml uv.lock .python-version ./
RUN --mount=type=cache,target=/root/.cache/uv \
    uv sync --frozen --no-dev --no-install-project

# Then install the project itself as a regular wheel.
COPY README.md ./
COPY src ./src
RUN --mount=type=cache,target=/root/.cache/uv \
    uv sync --frozen --no-dev --no-editable

# ---- Runtime stage -----------------------------------------------------------
FROM python:3.13-alpine3.23 AS runtime

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/app/.venv/bin:$PATH" \
    MCP_TRANSPORT=http \
    MCP_HOST=0.0.0.0 \
    MCP_PORT=8000

RUN addgroup -S -g 1001 xmcp \
 && adduser -S -D -H -u 1001 -G xmcp xmcp

WORKDIR /app
COPY --from=builder --chown=xmcp:xmcp /app/.venv /app/.venv

USER xmcp

EXPOSE 8000

# In HTTP mode, probe the MCP port; stdio containers are always healthy.
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD ["python", "-c", "import os, socket, sys\nif os.environ.get('MCP_TRANSPORT', 'stdio') != 'http':\n    sys.exit(0)\ns = socket.socket()\ns.settimeout(3)\nsys.exit(s.connect_ex(('127.0.0.1', int(os.environ.get('MCP_PORT', '8000')))))"]

CMD ["python", "-m", "xmcp"]