import {
  LOCAL_SECTIONS,
  SECTIONS,
  postTypeSection,
  sitemapPostTypeSection,
  sitemapTaxonomySection,
  taxonomySection,
} from '../../pages/seo/settings.copy';

export interface SeoNavSection {
  key: string;
  label: string;
  description: string;
  /** A caption the row sits under ("Post types"), for the per-type sections. */
  group?: string;
}

export interface SeoTypes {
  post_types: Record<string, string>;
  taxonomies: Record<string, string>;
}

export interface SeoNavSections {
  defaultKey: string;
  sections: SeoNavSection[];
}

const pick = (
  copy: Record<string, { title: string; description: string }>,
  keys: Record<string, string>
): SeoNavSection[] =>
  Object.entries(keys).map(([key, copyKey]) => ({
    key,
    label: copy[copyKey].title,
    description: copy[copyKey].description,
  }));

/**
 * The sections the sidebar lists under each settings page; the page's own
 * rail adds the per-type ones Titles & meta and Sitemap build at runtime.
 */
export const SEO_NAV_SECTIONS: Record<string, SeoNavSections> = {
  '/seo/general': {
    defaultKey: 'links',
    sections: pick(SECTIONS, {
      links: 'links',
      breadcrumbs: 'breadcrumbs',
      redirects: 'redirects',
      monitor404: 'monitor404',
      images: 'images',
      frontend: 'frontend',
      webmaster: 'webmaster',
      plugins: 'plugins',
      llms: 'llms',
      robots: 'robots',
      htaccess: 'htaccess',
      others: 'others',
      woocommerce: 'woocommerce',
    }),
  },
  '/seo/titles': {
    defaultKey: 'global',
    sections: pick(SECTIONS, {
      global: 'global',
      local: 'local',
      social: 'social',
      homepage: 'homepage',
      authors: 'authors',
      misc: 'misc',
    }),
  },
  '/seo/sitemap': {
    defaultKey: 'general',
    sections: pick(SECTIONS, {
      general: 'sitemapGeneral',
      media: 'sitemapMedia',
      html: 'sitemapHtml',
      indexnow: 'sitemapIndexnow',
      authors: 'sitemapAuthors',
    }),
  },
  '/seo/local': {
    defaultKey: 'business',
    sections: pick(LOCAL_SECTIONS, {
      business: 'business',
      contact: 'contact',
      pages: 'pages',
      locations: 'locations',
    }),
  },
};

/**
 * The per-type sections Titles & meta and Sitemap add after their fixed
 * ones, from the types the plugin reports; the keys match what the pages
 * read from `?section=`.
 */
export function typeSections(page: string, types: SeoTypes): SeoNavSection[] {
  const titles = page === '/seo/titles';
  if (!titles && page !== '/seo/sitemap') return [];
  const postType = titles ? postTypeSection : sitemapPostTypeSection;
  const taxonomy = titles ? taxonomySection : sitemapTaxonomySection;
  return [
    ...Object.entries(types.post_types).map(([slug, label]) => ({
      key: `post-type-${slug}`,
      label,
      description: postType(label).description,
      group: 'Post types',
    })),
    ...Object.entries(types.taxonomies).map(([slug, label]) => ({
      key: `taxonomy-${slug}`,
      label,
      description: taxonomy(label).description,
      group: 'Taxonomies',
    })),
  ];
}

export function currentSection(page: string, search: string): string | null {
  const known = SEO_NAV_SECTIONS[page];
  if (!known) return null;
  return new URLSearchParams(search).get('section') ?? known.defaultKey;
}