import { AI_DOC_URL } from "yt-dlp-transcript-common/lib/project";

export type NavLink = { href: string; label: string; external?: boolean };

// The header's inline nav (and the mobile sheet's first links), from what this
// build has. Ask AI is new: the chat was only reachable from the workspace
// control or from Use with AI, which is not where anyone looks for it. Use
// with AI is the homepage's AI and MCP doc (release 16 slice DX): off this
// site, so a plain <a> in the same tab, not a client navigation. Reports
// shows when this build has a report (public/reports/index.json).
//
// A CITED site (site.json `search: false`) publishes only its reports and
// their moments: no search, no chat, no downloads or duplicates, and nothing
// for an AI to read — its nav is Reports alone, or nothing when its one
// report IS the home page (`singleReport`).
export function headerNavLinks(has: {
  cited: boolean;
  reports: boolean;
  duplicates: boolean;
  downloads: boolean;
  singleReport?: boolean;
}): NavLink[] {
  if (has.cited) return has.singleReport ? [] : [{ href: "/reports/", label: "Reports" }];
  return [
    { href: "/", label: "Search" },
    { href: "/ask/", label: "Ask AI" },
    ...(has.reports ? [{ href: "/reports/", label: "Reports" }] : []),
    ...(has.duplicates ? [{ href: "/duplicates", label: "Duplicates" }] : []),
    ...(has.downloads ? [{ href: "/downloads", label: "Downloads" }] : []),
    { href: AI_DOC_URL, label: "Use with AI", external: true },
  ];
}