#!/usr/bin/env bash
set -euo pipefail

# check-onboard: Detect onboarding status (FIRST_INSTALL / UPDATE / CURRENT)
# Output contract: line 1 = status, subsequent lines = key=value pairs

PLUGIN_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
# plan 85-06: platform.cjs version read (no python3 dependency).
CURRENT_VERSION=$(node -e "try{process.stdout.write(require('$PLUGIN_ROOT/lib/core/platform.cjs').readPluginJsonVersion('$PLUGIN_ROOT'))}catch(e){process.stdout.write('unknown')}" 2>/dev/null || echo "unknown")

MARKER="$HOME/.mindrian-onboarded"

# Handle --write flag (create/update marker file)
if [ "${1:-}" = "--write" ]; then
  echo "$CURRENT_VERSION" > "$MARKER"
  echo "$(date -u +%Y-%m-%d)" >> "$MARKER"
  exit 0
fi

# Detection logic
if [ ! -f "$MARKER" ]; then
  echo "FIRST_INSTALL"
  echo "CURRENT=$CURRENT_VERSION"
  exit 0
fi

# Marker exists -- read stored version
MARKER_VERSION=$(head -1 "$MARKER" 2>/dev/null || echo "0.0.0")

# Compare versions using sort -V
LOWER=$(printf '%s\n%s' "$MARKER_VERSION" "$CURRENT_VERSION" | sort -V | head -1)

if [ "$MARKER_VERSION" = "$CURRENT_VERSION" ]; then
  echo "CURRENT"
elif [ "$LOWER" = "$MARKER_VERSION" ]; then
  # Marker is older than current -- update available
  echo "UPDATE"
  echo "PREVIOUS=$MARKER_VERSION"
  echo "CURRENT=$CURRENT_VERSION"
else
  # Marker is newer (dev scenario) -- treat as current
  echo "CURRENT"
fi