#!/bin/bash
# Continuous Learning - Session Evaluator
# Runs on sessionEnd to extract reusable patterns from Cursor sessions
#
# Configured in .cursor/hooks.json:
#   sessionEnd -> node .cursor/scripts/hooks/evaluate-session.js
# This shell version is a fallback.
#
# Extracted skills saved to: .agents/skills/learned/

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="$(git rev-parse --show-toplevel 2>/dev/null || pwd)"
CONFIG_FILE="$SCRIPT_DIR/config.json"
LEARNED_SKILLS_PATH="${ROOT}/.agents/skills/learned"
MIN_SESSION_LENGTH=10

# Load config if exists
if [ -f "$CONFIG_FILE" ]; then
  MIN_SESSION_LENGTH=$(jq -r '.min_session_length // 10' "$CONFIG_FILE")
  configured_path=$(jq -r '.learned_skills_path // empty' "$CONFIG_FILE")
  if [ -n "$configured_path" ]; then
    LEARNED_SKILLS_PATH=$(echo "$configured_path" | sed "s|~|$HOME|")
    case "$LEARNED_SKILLS_PATH" in
      /*) ;;
      *) LEARNED_SKILLS_PATH="${ROOT}/${LEARNED_SKILLS_PATH}" ;;
    esac
  fi
fi

# Ensure learned skills directory exists
mkdir -p "$LEARNED_SKILLS_PATH"

# Get transcript path from environment (set by Claude Code)
transcript_path="${CLAUDE_TRANSCRIPT_PATH:-}"

if [ -z "$transcript_path" ] || [ ! -f "$transcript_path" ]; then
  exit 0
fi

# Count messages in session
message_count=$(grep -c '"type":"user"' "$transcript_path" 2>/dev/null || echo "0")

# Skip short sessions
if [ "$message_count" -lt "$MIN_SESSION_LENGTH" ]; then
  echo "[ContinuousLearning] Session too short ($message_count messages), skipping" >&2
  exit 0
fi

# Signal to Claude that session should be evaluated for extractable patterns
echo "[ContinuousLearning] Session has $message_count messages - evaluate for extractable patterns" >&2
echo "[ContinuousLearning] Save learned skills to: $LEARNED_SKILLS_PATH" >&2