#!/bin/bash
# Start the jobbsok-tools stdio MCP server on an interpreter that is new enough.
#
# bash 3.2-clean and ASCII-only on purpose: the system bash on this Mac is 3.2,
# and a multibyte character has crashed a `set -u` script here before.
#
# Why this file exists at all, rather than .mcp.json naming python3 directly:
# a GUI-spawned process on this Mac can resolve python3 to 3.9.6 under an
# empty launchd PATH (risk H2). A server running on 3.9.6 is worse than no
# server, because the degradation branch already covers an absent server and
# nothing covers a silently wrong one. So every candidate below is gated on
# the version, and when none passes the launcher refuses instead of falling
# through to whatever python3 the PATH happens to offer.
#
# Resolution order, first candidate that passes the gate wins:
#   1. $JOBBSOK_PYTHON             -- the manual override. Named explicitly by
#                                     the operator, so a version failure here
#                                     is refused outright rather than skipped:
#                                     falling back from an interpreter someone
#                                     asked for would hide their mistake.
#   2. $CLAUDE_PLUGIN_DATA/venv    -- what scripts/bootstrap.sh builds against
#                                     an installed plugin. This is the
#                                     supported route in an installed copy.
#   3. $CLAUDE_PLUGIN_ROOT/.venv   -- the development environment. The packaged
#                                     archive excludes the virtualenv, so this
#                                     branch never fires in an installed copy.
#   4. python3 on PATH             -- last resort, and only at 3.10 or newer.

set -eu

MIN_MAJOR=3
MIN_MINOR=10

SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
if [ -n "${CLAUDE_PLUGIN_ROOT:-}" ]; then
  PLUGIN_ROOT="$CLAUDE_PLUGIN_ROOT"
else
  PLUGIN_ROOT=$(cd "$SCRIPT_DIR/.." && pwd)
fi
SERVER="${PLUGIN_ROOT}/scripts/jobbsok_tools.py"

version_ok() {
  "$1" -c "import sys; sys.exit(0 if sys.version_info >= ($MIN_MAJOR, $MIN_MINOR) else 1)" \
    >/dev/null 2>&1
}

version_of() {
  "$1" -c "import sys; print('%d.%d.%d' % sys.version_info[:3])" 2>/dev/null || echo "ukjent"
}

usable() {
  [ -n "$1" ] || return 1
  command -v "$1" >/dev/null 2>&1 || return 1
  version_ok "$1"
}

PYTHON_BIN=""

if [ -n "${JOBBSOK_PYTHON:-}" ]; then
  if ! command -v "$JOBBSOK_PYTHON" >/dev/null 2>&1; then
    echo "jobbsok-tools: JOBBSOK_PYTHON=$JOBBSOK_PYTHON is not executable." >&2
    echo "jobbsok-tools: refusing to start. Point it at a Python ${MIN_MAJOR}.${MIN_MINOR}+ interpreter." >&2
    exit 1
  fi
  if ! version_ok "$JOBBSOK_PYTHON"; then
    echo "jobbsok-tools: JOBBSOK_PYTHON=$JOBBSOK_PYTHON is Python $(version_of "$JOBBSOK_PYTHON")." >&2
    echo "jobbsok-tools: ${MIN_MAJOR}.${MIN_MINOR}+ is required; refusing to start on it." >&2
    exit 1
  fi
  PYTHON_BIN="$JOBBSOK_PYTHON"
fi

if [ -z "$PYTHON_BIN" ] && [ -n "${CLAUDE_PLUGIN_DATA:-}" ]; then
  CANDIDATE="${CLAUDE_PLUGIN_DATA}/venv/bin/python"
  if usable "$CANDIDATE"; then
    PYTHON_BIN="$CANDIDATE"
  fi
fi

if [ -z "$PYTHON_BIN" ]; then
  CANDIDATE="${PLUGIN_ROOT}/.venv/bin/python3"
  if usable "$CANDIDATE"; then
    PYTHON_BIN="$CANDIDATE"
  fi
fi

if [ -z "$PYTHON_BIN" ]; then
  CANDIDATE=$(command -v python3 2>/dev/null || true)
  if usable "$CANDIDATE"; then
    PYTHON_BIN="$CANDIDATE"
  fi
fi

if [ -z "$PYTHON_BIN" ]; then
  echo "jobbsok-tools: found no Python ${MIN_MAJOR}.${MIN_MINOR}+ interpreter." >&2
  echo "jobbsok-tools: tried JOBBSOK_PYTHON, \$CLAUDE_PLUGIN_DATA/venv, \$CLAUDE_PLUGIN_ROOT/.venv and python3 on PATH." >&2
  echo "jobbsok-tools: run 'bash scripts/bootstrap.sh' against the installed plugin, or set JOBBSOK_PYTHON." >&2
  echo "jobbsok-tools: refusing to start rather than serving on an interpreter below ${MIN_MAJOR}.${MIN_MINOR}." >&2
  exit 1
fi

if [ ! -f "$SERVER" ]; then
  echo "jobbsok-tools: server not found at $SERVER" >&2
  exit 1
fi

exec "$PYTHON_BIN" "$SERVER" "$@"