import { NextRequest, NextResponse } from "next/server";
import { getPocketBaseConfig } from "@/config/services.config";
import { AUTH_COOKIE_DOMAIN } from "@/config/domain.config";

const COOKIE_NAME = "pb_session";
const COOKIE_MAX_AGE = 60 * 60 * 24 * 365;

export async function GET(request: NextRequest) {
  const cookie = request.cookies.get(COOKIE_NAME)?.value;
  if (!cookie) {
    return NextResponse.json({ ok: true, user: null });
  }
  try {
    const payload = JSON.parse(Buffer.from(cookie, "base64url").toString("utf-8"));
    const { token, userId, email } = payload;
    if (!token || !userId) return NextResponse.json({ ok: true, user: null });

    const pb = getPocketBaseConfig();
    const res = await fetch(`${pb.url}/api/users/refresh`, {
      headers: { Authorization: `Bearer ${token}` },
    });
    if (!res.ok) {
      const r = NextResponse.json({ ok: true, user: null });
      r.cookies.set(COOKIE_NAME, "", { domain: AUTH_COOKIE_DOMAIN, path: "/", maxAge: 0 });
      return r;
    }
    const data = await res.json();
    const newToken = data.token;
    const newRecord = data.record;
    // 刷新成功：回写新 token 到 Cookie，保持登录态长期有效
    if (newToken && newRecord?.id) {
      const newPayload = JSON.stringify({
        token: newToken,
        userId: newRecord.id,
        email: newRecord.email ?? email,
      });
      const encoded = Buffer.from(newPayload, "utf-8").toString("base64url");
      const r = NextResponse.json({
        ok: true,
        user: { id: newRecord.id, email: newRecord.email ?? email },
        token: newToken,
      });
      r.cookies.set(COOKIE_NAME, encoded, {
        domain: AUTH_COOKIE_DOMAIN,
        path: "/",
        maxAge: COOKIE_MAX_AGE,
        secure: process.env.NODE_ENV === "production",
        sameSite: "lax",
        httpOnly: true,
      });
      return r;
    }
    return NextResponse.json({
      ok: true,
      user: { id: data.record?.id ?? userId, email: data.record?.email ?? email },
      token: data.token,
    });
  } catch {
    return NextResponse.json({ ok: true, user: null });
  }
}