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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=lib.sh
. "${SCRIPT_DIR}/lib.sh"

qipai_backup_status() {
  local policy_template runbook
  policy_template="${SCRIPT_DIR}/../../deploy/backup/backup-policy.template.json"
  runbook="${SCRIPT_DIR}/../../deploy/backup/backup-restore-runbook.md"

  qipai_info "backup root: ${APP_ROOT}/backups"
  qipai_info "mysql backup dir: ${APP_ROOT}/backups/mysql"
  qipai_info "emqx backup dir: ${APP_ROOT}/backups/emqx"
  qipai_info "files backup dir: ${APP_ROOT}/backups/files"
  qipai_info "policy template: ${policy_template}"
  qipai_info "runbook: ${runbook}"

  [ -f "$policy_template" ] && qipai_pass "backup policy template exists" || qipai_warn "backup policy template not found"
  [ -f "$runbook" ] && qipai_pass "backup/restore runbook exists" || qipai_warn "backup/restore runbook not found"

  qipai_command_status mysqldump
  qipai_command_status mysql
  qipai_command_status tar
  qipai_command_status gzip

  if command -v emqx >/dev/null 2>&1; then
    qipai_pass "emqx export command available"
  else
    qipai_warn "emqx command not found; EMQX export unavailable"
  fi

  for dir in "${APP_ROOT}/backups/mysql" "${APP_ROOT}/backups/emqx" "${APP_ROOT}/backups/files" "${APP_ROOT}/backups/manual"; do
    [ -d "$dir" ] && qipai_pass "backup directory exists: $dir" || qipai_warn "backup directory not found: $dir"
  done
}

qipai_backup() {
  qipai_require_root_for_write
  local backup_dir manifest
  backup_dir="${APP_ROOT}/backups/manual/$(date +%Y%m%d%H%M%S)"
  mkdir -p "$backup_dir"
  manifest="${backup_dir}/backup.json"
  cat >"$manifest" <<EOF
{
  "generatedAt": "$(qipai_timestamp)",
  "type": "M00_MANIFEST_ONLY",
  "policyTemplate": "deploy/backup/backup-policy.template.json",
  "mysql": "SKIPPED_NO_CONFIG",
  "emqx": "SKIPPED_NO_CONFIG",
  "uploads": "SKIPPED_NO_UPLOAD_DIR",
  "note": "Real backup commands will be enabled after production configuration is present."
}
EOF
  qipai_pass "backup manifest written: $manifest"
}

if [ "${1:-}" = "--run" ]; then
  qipai_backup
elif [ "${1:-}" = "--status" ]; then
  qipai_backup_status
fi