/** 站点 SEO 按 locale 构造（唯一配置源仍在此，喂给 @app/seo-geo）。 */
import type { PageSeoInput, SiteSeoConfig } from "@app/seo-geo";
import { type Locale, t } from "@app/i18n";

const rawSiteUrl = import.meta.env.PUBLIC_SITE_URL?.replace(/\/+$/, "");
const siteUrl = rawSiteUrl && rawSiteUrl.length > 0 ? rawSiteUrl : "http://localhost:4321";

/** 无 locale 的公开路径（basePath）；受保护页面不进 llms/sitemap 列表。 */
const PUBLIC_PATHS = ["/"] as const;

function pathForLocale(locale: Locale, basePath: string): string {
    if (basePath === "/") return locale === "zh-CN" ? "/zh-CN" : "/en";
    return locale === "zh-CN" ? `/zh-CN${basePath}` : `/en${basePath}`;
}

export function getSiteSeo(locale: Locale): SiteSeoConfig {
    const name = t(locale, "meta.brand");
    const isZh = locale === "zh-CN";
    const description = isZh
        ? "Astro + tRPC + Drizzle monorepo 应用脚手架，开箱即用的分层基线。"
        : "Astro + tRPC + Drizzle monorepo application scaffold with a ready vertical baseline.";

    return {
        siteUrl,
        name,
        description,
        locale: isZh ? "zh-CN" : "en",
        defaultImage: "/og-default.png",
        organization: { name, url: siteUrl },
        llms: {
            summary: isZh
                ? "这是可复用的应用脚手架模板：Astro SSR + React islands + tRPC + Drizzle/Turso，附带鉴权与用户垂直示例。"
                : "Reusable application scaffold: Astro SSR + React islands + tRPC + Drizzle/Turso, with auth and a user vertical example.",
            details: [
                isZh
                    ? "分层：types → models → db → dao → trpc → web。业务实体按 user 切片扩展，禁止跨层。"
                    : "Layers: types → models → db → dao → trpc → web. Extend domains via the user slice; never skip layers.",
                isZh
                    ? "不绑定具体产品业务；works 等领域逻辑应在业务仓库中添加。"
                    : "No product domain baked in; add domains such as works in your product repo.",
            ],
            pages: PUBLIC_PATHS.map((basePath) => ({
                path: pathForLocale(locale, basePath),
                title: basePath === "/" ? `${name}${isZh ? "首页" : " home"}` : name,
                description,
            })),
            discouraged: isZh
                ? ["/dashboard、/settings 等需登录页面", "/auth/* 等认证页", "/api/* 接口响应"]
                : [
                      "/dashboard, /settings and other app pages",
                      "/auth/* and auth pages",
                      "/api/* responses",
                  ],
        },
    };
}

/** 兼容旧引用：默认中文。 */
export const siteSeo = getSiteSeo("zh-CN");

export function pageSeo(input: PageSeoInput): PageSeoInput {
    return input;
}