import { Link } from "react-router-dom";
import { ChevronRight } from "lucide-react";

export default function BreadcrumbBar({ pathname }: { pathname: string }) {
  const parts = pathname.split("/").filter(Boolean);
  const labels = parts.length ? parts : ["campaigns"];

  return (
    <div className="breadcrumb-bar">
      <nav className="breadcrumbs" aria-label="Breadcrumb">
        {labels.map((part, index) => {
          const href = `/${labels.slice(0, index + 1).join("/")}`;
          return (
            <span className="crumb" key={`${part}-${index}`}>
              <Link className="crumb-link" to={href}>{labelFor(part, labels, index)}</Link>
              {index < labels.length - 1 && <ChevronRight size={16} aria-hidden="true" />}
            </span>
          );
        })}
      </nav>
    </div>
  );
}

const campaignRouteLabels: Record<string, string> = {
  data: "General",
  campaign: "General",
  settings: "Global settings",
  "global-settings": "Global settings",
  fields: "Fields",
  recipients: "Recipients",
  template: "Template",
  files: "Attachments",
  attachments: "Attachments",
  mail: "Server settings",
  "mail-settings": "Server settings",
  "server-settings": "Server settings",
  review: "Review",
  send: "Send",
  report: "Report",
  reports: "Report",
  audit: "Audit log",
  json: "JSON",
  wizard: "Wizard",
  create: "Create",
};

const topLevelRouteLabels: Record<string, string> = {
  campaigns: "Campaigns",
  dashboard: "Dashboard",
  templates: "Templates",
  files: "Files",
  reports: "Reports",
  settings: "Settings",
  admin: "Admin",
};

function labelFor(value: string, parts: string[], index: number): string {
  if (parts[0] === "campaigns" && index === 1) return "Campaign";
  if (parts[0] === "campaigns" && index >= 2) {
    const mapped = campaignRouteLabels[value];
    if (mapped) return mapped;
  }

  const mapped = topLevelRouteLabels[value];
  if (mapped) return mapped;
  if (value.length > 18) return "Campaign";
  return value.replace(/-/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
}