import { NextResponse } from "next/server";
import { getSessionUser, requireSessionUser } from "@/lib/server/session";
import { apiError, toErrorResponse } from "@/lib/server/errors";
import { getRequestMeta } from "@/lib/server/request";
import { acceptInviteLink, getInviteLinkSummaryByToken, getInviteViewerStatus } from "@/lib/server/group-invites";
import { enforceIpRateLimit } from "@/lib/server/rate-limit";

export async function GET(_: Request, context: { params: Promise<{ token: string }> }) {
    const { requestId, ip } = await getRequestMeta();
    try {
        await enforceIpRateLimit({ scope: "invite-links:get:ip", ip, limit: 120 });
        const { token } = await context.params;
        const normalized = String(token || "").trim();
        if (!normalized) apiError("INVITE_NOT_FOUND");
        const link = await getInviteLinkSummaryByToken(normalized);
        if (!link) apiError("INVITE_NOT_FOUND", { tokenLast4: normalized.slice(-4) });
        const user = await getSessionUser();
        if (user) {
            const viewerStatus = await getInviteViewerStatus({ userId: user.id, groupId: link.groupId });
            if (viewerStatus)
                return NextResponse.json({ requestId, request_id: requestId, link: { ...link, viewerStatus } });
        }
        return NextResponse.json({ requestId, request_id: requestId, link });
    } catch (e) {
        const { status, body } = toErrorResponse(e, "GET /api/invite-links/[token]", requestId);
        return NextResponse.json(body, { status });
    }
}

export async function POST(_: Request, context: { params: Promise<{ token: string }> }) {
    const { requestId, ip, userAgent } = await getRequestMeta();
    try {
        await enforceIpRateLimit({ scope: "invite-links:accept:ip", ip, limit: 60 });
        const user = await requireSessionUser();
        const { token } = await context.params;
        const normalized = String(token || "").trim();
        if (!normalized) apiError("INVITE_NOT_FOUND");
        const result = await acceptInviteLink({ userId: user.id, token: normalized, requestId, ip, userAgent });
        return NextResponse.json({ requestId, request_id: requestId, result });
    } catch (e) {
        const { status, body } = toErrorResponse(e, "POST /api/invite-links/[token]", requestId);
        return NextResponse.json(body, { status });
    }
}