/**
 * Web search API wrapper using SearXNG public instances.
 * No API key required — free for server-side use.
 */

export interface SearchResult {
    title: string;
    url: string;
    snippet: string;
}

const SEARXNG_INSTANCES = [
    "https://searx.be",
    "https://search.sapti.me",
    "https://searx.tiekoetter.com",
    "https://search.bus-hit.me",
];

async function searchSearXNG(query: string): Promise<SearchResult[]> {
    for (const instance of SEARXNG_INSTANCES) {
        try {
            const url = `${instance}/search?q=${encodeURIComponent(query)}&format=json&categories=general&language=en`;
            const controller = new AbortController();
            const timeout = setTimeout(() => controller.abort(), 8000);

            const res = await fetch(url, {
                signal: controller.signal,
                headers: {
                    "User-Agent": "PromptArch/1.4 (https://rommark.dev)",
                    Accept: "application/json",
                },
            });
            clearTimeout(timeout);

            if (!res.ok) continue;

            const data = await res.json();
            const results: SearchResult[] = (data.results || [])
                .slice(0, 8)
                .map((r: Record<string, string>) => ({
                    title: r.title || "",
                    url: r.url || "",
                    snippet: r.content || "",
                }))
                .filter((r: SearchResult) => r.title && r.url);

            if (results.length > 0) return results;
        } catch {
            // Try next instance
        }
    }
    return [];
}

export async function searchWeb(query: string): Promise<SearchResult[]> {
    // Clean the query — take first meaningful line, max 200 chars
    const cleanQuery = query
        .split("\n")[0]
        .replace(/\[.*?\]/g, "")
        .trim()
        .substring(0, 200);

    if (!cleanQuery || cleanQuery.length < 3) return [];

    return searchSearXNG(cleanQuery);
}