import type { BulkUserItem } from "../../../lib/adminApi";

export function parseUserCSV(text: string): BulkUserItem[] {
  const lines = text.split(/\r?\n/);
  if (lines.length < 2) {
    return [];
  }

  const headers = lines[0].split(",").map((h) => h.trim().toLowerCase());
  const data: BulkUserItem[] = [];

  for (let i = 1; i < lines.length; i++) {
    if (!lines[i].trim()) continue;

    const values = lines[i].split(",").map((v) => v.trim());
    const item: Partial<BulkUserItem> & { metadata: Record<string, string> } = {
      metadata: {},
    };

    for (let index = 0; index < headers.length; index++) {
      const header = headers[index];
      const value = values[index];
      if (value === undefined || value === "") continue;

      if (header === "email") {
        item.email = value;
      } else if (header === "name") {
        item.name = value;
      } else if (header === "phone") {
        item.phone = value;
      } else if (header === "role") {
        item.role = value;
      } else if (header === "tenant") {
        item.tenantSlug = value;
      } else if (header === "department") {
        item.department = value;
      } else if (header === "position") {
        item.position = value;
      } else if (header === "jobtitle") {
        item.jobTitle = value;
      } else {
        item.metadata[header] = value;
      }
    }

    if (item.email && item.name) {
      data.push(item as BulkUserItem);
    }
  }

  return data;
}