#!/usr/bin/env bash
# SessionStart hook for ArcheFlow plugin.
# Injects the using-archeflow skill as additional context.

set -euo pipefail

PLUGIN_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
SKILL_FILE="${PLUGIN_ROOT}/skills/using-archeflow/SKILL.md"

if [ ! -f "$SKILL_FILE" ]; then
  echo '{}'
  exit 0
fi

CONTENT=$(awk 'BEGIN{skip=0} /^---$/{skip++; next} skip>=2{print}' "$SKILL_FILE")

# Use node if available, fall back to printf-based JSON escaping
if command -v node &>/dev/null; then
  node -e "
    const content = require('fs').readFileSync('/dev/stdin', 'utf8');
    console.log(JSON.stringify({
      hookSpecificOutput: { additionalContext: content }
    }));
  " <<< "$CONTENT"
else
  # Portable fallback: escape for JSON using sed
  ESCAPED=$(printf '%s' "$CONTENT" | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e ':a;N;$!ba;s/\n/\\n/g')
  printf '{"hookSpecificOutput":{"additionalContext":"%s"}}' "$ESCAPED"
fi