#!/bin/bash
set -euo pipefail

migrate_legacy_data() {
  local legacy_root="$TRIM_PKGVAR/data"
  local legacy_db="$legacy_root/havline.db"
  local target_db="$TRIM_PKGVAR/havline.db"

  if [ ! -f "$legacy_db" ] || [ -f "$target_db" ]; then
    return 0
  fi

  echo "检测到旧版数据布局：$legacy_root"
  mkdir -p "$TRIM_PKGVAR/backups"

  for item in "$legacy_root"/* "$legacy_root"/.[!.]* "$legacy_root"/..?*; do
    [ -e "$item" ] || continue
    local name
    name="$(basename "$item")"
    if [ -e "$TRIM_PKGVAR/$name" ]; then
      continue
    fi
    mv "$item" "$TRIM_PKGVAR/$name"
  done

  echo "旧版数据已迁移到：$TRIM_PKGVAR"
}

backup_database() {
  local db="$TRIM_PKGVAR/havline.db"
  if [ ! -f "$db" ]; then
    return 0
  fi

  mkdir -p "$TRIM_PKGVAR/backups"
  cp -f "$db" "$TRIM_PKGVAR/backups/havline-pre-upgrade-$(date +%Y%m%d%H%M%S).db"
}