import type { MetadataRoute } from 'next';
import { getAllPublishedSlugs } from '@/lib/cms/data-server';

const BASE_URL = 'https://www.novalon.cn';

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const staticPages: MetadataRoute.Sitemap = [
    { url: `${BASE_URL}/`, lastModified: new Date(), changeFrequency: 'daily', priority: 1 },
    { url: `${BASE_URL}/about`, lastModified: new Date(), changeFrequency: 'monthly', priority: 0.8 },
    { url: `${BASE_URL}/services`, lastModified: new Date(), changeFrequency: 'weekly', priority: 0.9 },
    { url: `${BASE_URL}/products`, lastModified: new Date(), changeFrequency: 'weekly', priority: 0.9 },
    { url: `${BASE_URL}/solutions`, lastModified: new Date(), changeFrequency: 'weekly', priority: 0.9 },
    { url: `${BASE_URL}/cases`, lastModified: new Date(), changeFrequency: 'weekly', priority: 0.8 },
    { url: `${BASE_URL}/news`, lastModified: new Date(), changeFrequency: 'daily', priority: 0.7 },
    { url: `${BASE_URL}/team`, lastModified: new Date(), changeFrequency: 'monthly', priority: 0.6 },
    { url: `${BASE_URL}/contact`, lastModified: new Date(), changeFrequency: 'monthly', priority: 0.7 },
  ];

  try {
    // 从 CMS 获取动态页面 slug
    const [caseSlugs, newsSlugs, serviceSlugs, productSlugs, solutionSlugs] = await Promise.all([
      getAllPublishedSlugs('case-study'),
      getAllPublishedSlugs('news'),
      getAllPublishedSlugs('service'),
      getAllPublishedSlugs('product'),
      getAllPublishedSlugs('solution'),
    ]);

    const casePages: MetadataRoute.Sitemap = caseSlugs.map(({ slug }) => ({
      url: `${BASE_URL}/cases/${slug}`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.8,
    }));

    const newsPages: MetadataRoute.Sitemap = newsSlugs.map(({ slug }) => ({
      url: `${BASE_URL}/news/${slug}`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.6,
    }));

    const servicePages: MetadataRoute.Sitemap = serviceSlugs.map(({ slug }) => ({
      url: `${BASE_URL}/services/${slug}`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.8,
    }));

    const productPages: MetadataRoute.Sitemap = productSlugs.map(({ slug }) => ({
      url: `${BASE_URL}/products/${slug}`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.8,
    }));

    const solutionPages: MetadataRoute.Sitemap = solutionSlugs.map(({ slug }) => ({
      url: `${BASE_URL}/solutions/${slug}`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.8,
    }));

    return [
      ...staticPages,
      ...casePages,
      ...newsPages,
      ...servicePages,
      ...productPages,
      ...solutionPages,
    ];
  } catch {
    // 数据库不可用时返回静态页面
    return staticPages;
  }
}