// /app/api/support/kofi/claim/verify/route.ts
import { NextRequest, NextResponse } from "next/server";

const DIRECTUS = (process.env.DIRECTUS_URL || "").replace(/\/$/, "");
const BOT_TOKEN = process.env.DIRECTUS_TOKEN_ADMIN_SUPPORTER!;
const COLLECTION = "user_memberships";

// Default redirects; can be overridden by env
const SUCCESS_REDIRECT = process.env.KOFI_LINK_SUCCESS_URL || "/portal/account?linked=kofi&ok=1";
const FAIL_REDIRECT = process.env.KOFI_LINK_FAIL_URL || "/portal/account?linked=kofi&error=1";

export async function GET(req: NextRequest) {
    const token = req.nextUrl.searchParams.get("token") || "";
    const to = (path: string) => NextResponse.redirect(new URL(path, req.url));

    if (!token) return to(FAIL_REDIRECT);

    // Find the claim row by token
    const filter = encodeURIComponent(JSON.stringify({ claim_token: { _eq: token } }));
    const res = await fetch(`${DIRECTUS}/items/${COLLECTION}?filter=${filter}&limit=1`, {
        headers: { Authorization: `Bearer ${BOT_TOKEN}` },
        cache: "no-store",
    });
    if (!res.ok) return to(FAIL_REDIRECT);

    const json = await res.json().catch(() => ({} as any));
    const rec = json?.data?.[0];
    if (!rec) return to(FAIL_REDIRECT);

    // Validate expiry and sanity
    const exp = rec.claim_expires_at ? new Date(rec.claim_expires_at).getTime() : 0;
    if (!exp || Date.now() > exp) return to(FAIL_REDIRECT);
    if (!rec.claim_user_id) return to(FAIL_REDIRECT);

    // Finalize: set app_user to claim_user_id; clear claim fields
    const patch = await fetch(`${DIRECTUS}/items/${COLLECTION}/${rec.id}`, {
        method: "PATCH",
        headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${BOT_TOKEN}`,
        },
        body: JSON.stringify({
            app_user: rec.claim_user_id,
            claim_token: null,
            claim_expires_at: null,
            claim_user_id: null,
            last_event_at: new Date().toISOString(),
        }),
    });

    if (!patch.ok) return to(FAIL_REDIRECT);
    return to(SUCCESS_REDIRECT);
}