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

PLUGIN_ROOT="$(cd "$(dirname "$0")/.." 2>/dev/null && pwd)" || {
  echo '{}'
  exit 0
}

SKILL_FILE="${PLUGIN_ROOT}/skills/using-archeflow/SKILL.md"

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

# Strip YAML frontmatter (everything between first two --- lines)
CONTENT=$(awk 'BEGIN{skip=0} /^---$/{skip++; next} skip>=2{print}' "$SKILL_FILE" 2>/dev/null) || {
  echo '{}'
  exit 0
}

if [ -z "$CONTENT" ]; then
  echo '{}'
  exit 0
fi

# JSON-escape and output
if command -v node &>/dev/null; then
  node -e '
    const content = require("fs").readFileSync(0, "utf8");
    console.log(JSON.stringify({ hookSpecificOutput: { additionalContext: content } }));
  ' <<< "$CONTENT"
else
  # Portable fallback
  ESCAPED=$(printf '%s' "$CONTENT" | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e ':a;N;$!ba;s/\n/\\n/g' 2>/dev/null) || {
    echo '{}'
    exit 0
  }
  printf '{"hookSpecificOutput":{"additionalContext":"%s"}}' "$ESCAPED"
fi