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

VAULT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
HOOK_FILE="$VAULT_DIR/.git/hooks/post-commit"

mkdir -p "$(dirname "$HOOK_FILE")"
touch "$HOOK_FILE"
chmod +x "$HOOK_FILE"

if grep -q "memory async index hook begin" "$HOOK_FILE"; then
  echo "[memory] post-commit hook 已存在，跳过。"
  exit 0
fi

cat >> "$HOOK_FILE" <<'HOOK'
# --- memory async index hook begin ---
run_memory_async_index() {
  local vault_dir changes_file log_file
  vault_dir="$(git rev-parse --show-toplevel 2>/dev/null || true)"
  [[ -n "$vault_dir" ]] || return 0

  log_file="$vault_dir/.memory-sync.log"
  changes_file="$vault_dir/.memory-changes-$(date +%s)-$$.txt"

  git diff-tree --no-commit-id --name-status -r -M --diff-filter=ACDMRT HEAD -- '*.md' > "$changes_file" 2>/dev/null || true
  [[ -s "$changes_file" ]] || { rm -f "$changes_file"; return 0; }

  nohup bash -c "
    # 日志轮转：超过 5MB 保留最后 1000 行
    if [[ -f '$log_file' ]] && [[ \$(wc -c < '$log_file') -gt 5242880 ]]; then
      tail -n 1000 '$log_file' > '$log_file.tmp' && mv '$log_file.tmp' '$log_file'
    fi
    uv run --project '$vault_dir/.scripts/memory' python '$vault_dir/.scripts/memory/incremental_ingest.py' \
      --changes-file '$changes_file' >> '$log_file' 2>&1
    exit_code=\$?
    if [[ \$exit_code -ne 0 ]]; then
      echo \"\$(date '+%Y-%m-%d %H:%M:%S') [ERROR] incremental_ingest 退出码=\$exit_code\" >> '$log_file'
    fi
    rm -f '$changes_file'
  " &
}
run_memory_async_index
# --- memory async index hook end ---
HOOK

echo "[memory] post-commit hook 已安装。"