#!/usr/bin/env bash
# session-end.sh — SessionEnd hook
# Fires at session end; appends a journal entry to the vault's daily log.
# Exit code is ignored by Claude Code — used for cleanup/logging only.

# Capture stdin
STDIN=$(cat)

# Extract fields
SESSION_ID=$(echo "$STDIN" | jq -r '.session_id // empty')
REASON=$(echo "$STDIN" | jq -r '.reason // empty')

# Guard: if SESSION_ID is empty, use PID as fallback to ensure unique path
if [ -z "$SESSION_ID" ]; then
  SESSION_ID="unknown-$$"
fi

# Parse config with python3+PyYAML; handles missing file, missing key, and tilde
VAULT_PATH=$(python3 -c '
import yaml, os
p = os.path.expanduser("~/.claude/plugins/memory/config.yaml")
cfg = (yaml.safe_load(open(p)) or {}) if os.path.exists(p) else {}
print(os.path.expanduser(cfg.get("vault_path", "~/Documents/SecondBrain")))
')

# Compute journal path
JOURNAL_DIR="$VAULT_PATH/journal"
JOURNAL_PATH="$JOURNAL_DIR/$(date -u +%Y-%m-%d).md"

# Ensure journal directory exists
mkdir -p "$JOURNAL_DIR"

# Create journal note if absent (minimal frontmatter)
if [[ ! -f "$JOURNAL_PATH" ]]; then
  cat >"$JOURNAL_PATH" <<'EOF'
---
summary: Daily session log
tags: [scope/global, type/log]
---
EOF
fi

# Read touched paths from temp file
TOUCH_FILE="/tmp/claude-vault-touched-$SESSION_ID"
TOUCHED=$(cat "$TOUCH_FILE" 2>/dev/null || echo "")

# Format touched paths list
if [[ -z "$TOUCHED" ]]; then
  TOUCHED_LIST="(none)"
else
  TOUCHED_LIST="$TOUCHED"
fi

# Determine project context
PROJECT=$(git rev-parse --show-toplevel 2>/dev/null || echo "${CLAUDE_PROJECT_DIR:-unknown}")

# UTC timestamp for entry header
TIMESTAMP=$(date -u +%Y-%m-%dT%H:%M:%SZ)

# Append journal entry
{
  echo ""
  echo "## Session — $TIMESTAMP"
  echo ""
  echo "**Project:** $PROJECT"
  echo "**Reason:** $REASON"
  echo "**Vault notes touched:**"
  echo "$TOUCHED_LIST"
} >> "$JOURNAL_PATH"

# Cleanup temp file
rm -f "$TOUCH_FILE"

# ── memsearch memory git sync (fail-safe) ───────────────────────────────────
# Auto-commit + push the memsearch memory store (~/.memsearch) on session end.
# We own this sync here so we never patch the marketplace memsearch plugin
# (which clobbers on update). The whitelist .gitignore in ~/.memsearch tracks
# only memory/*.md + .gitignore, so `add -A` is safe.
#
# Robustness contract: this block MUST NEVER fail session shutdown.
#   - Skips silently if ~/.memsearch is not a git repo.
#   - Only commits when something is staged (no empty commits).
#   - Push is hard-timeboxed and failures are swallowed; the next session's
#     hook catches up since the daily memory files are append-only.
# Wrapped in a subshell with `|| true` so nothing here can abort the hook.
(
  MEMSEARCH_DIR="/home/jared/.memsearch"
  if [ -d "$MEMSEARCH_DIR/.git" ]; then
    git -C "$MEMSEARCH_DIR" add -A >/dev/null 2>&1
    if ! git -C "$MEMSEARCH_DIR" diff --cached --quiet; then
      git -C "$MEMSEARCH_DIR" commit -m "memsearch: session memory $(date +%F)" >/dev/null 2>&1
      echo "[session-end] memsearch memory committed"
    fi
    timeout 30 git -C "$MEMSEARCH_DIR" push --quiet origin main >/dev/null 2>&1 || true
  fi
) || true
# ────────────────────────────────────────────────────────────────────────────

exit 0