import { auditExportColumns } from "./auditExportColumns";
import { formatAuditRows } from "./auditExportFormatter";
import type { AuditEvent } from "..";
import { saveFileWithFeedback } from "../../utils/fileTaskFeedback";

const BOM = "\ufeff";

const escapeCsv = (val: string) => {
  const safe = (val ?? "").replace(/"/g, '""');
  return `"${safe}"`;
};

const buildCsv = (rows: Record<string, string>[]) => {
  const header = auditExportColumns.map((c) => escapeCsv(c.label)).join(",");
  const body = rows.map((row) => auditExportColumns.map((c) => escapeCsv(row[c.key] || "")).join(",")).join("\n");
  return `${BOM}${header}\n${body}`;
};

export interface AuditExportOptions {
  fileName: string;
}

export const exportAuditCsv = async (events: AuditEvent[], options: AuditExportOptions) => {
  const rows = formatAuditRows(events);
  const csv = buildCsv(rows);
  const blob = new Blob([csv], { type: "text/csv;charset=utf-8;" });
  await saveFileWithFeedback(
    {
      suggestedName: options.fileName.endsWith(".csv") ? options.fileName : `${options.fileName}.csv`,
      mimeType: "text/csv;charset=utf-8",
      data: blob,
    },
    {
      kind: "export",
      title: "导出审计记录",
      pendingDetail: "等待选择保存位置",
      completedDetail: "导出文件已保存",
    },
  );
};