import { NextRequest, NextResponse } from "next/server";
import { shareTargetSchema } from "@/lib/validation/shareSchemas";
import {
  ShareTargetNotFoundError,
  getShareLinkForContent,
  isContentSharedViaGroup,
  toggleShareLink,
} from "@/services/shareService";

export async function GET(request: NextRequest) {
  const parsed = shareTargetSchema.safeParse(
    Object.fromEntries(request.nextUrl.searchParams)
  );
  if (!parsed.success) {
    return NextResponse.json({ error: "Invalid share target" }, { status: 400 });
  }
  const { targetType, contentId } = parsed.data;
  const link = await getShareLinkForContent(targetType, contentId);
  if (targetType === "DECK" || targetType === "QUIZ") {
    const groupShare = await isContentSharedViaGroup(targetType, contentId);
    if (groupShare) {
      return NextResponse.json({
        token: groupShare.token,
        isGroupShared: true,
        groupName: groupShare.groupName,
      });
    }
  }
  return NextResponse.json({ token: link?.id ?? null, isGroupShared: false });
}

export async function POST(request: NextRequest) {
  const parsed = shareTargetSchema.safeParse(
    await request.json().catch(() => null)
  );
  if (!parsed.success) {
    return NextResponse.json({ error: "Invalid share target" }, { status: 400 });
  }
  try {
    const link = await toggleShareLink(
      parsed.data.targetType,
      parsed.data.contentId
    );
    return NextResponse.json({ token: link?.id ?? null });
  } catch (error) {
    if (error instanceof ShareTargetNotFoundError) {
      return NextResponse.json({ error: error.message }, { status: 404 });
    }
    console.error("Failed to update share link", error);
    return NextResponse.json({ error: "Failed to update sharing" }, { status: 500 });
  }
}