import { NextResponse } from "next/server";

const PULSE_API = process.env.PULSE_API_URL || "https://api.digital-home.site";
const PULSE_REFRESH = process.env.PULSE_REFRESH_TOKEN || "";

const MOCK_SAVINGS = [
  {
    id: 1,
    name: "Квартира Pulse Premier",
    current_amount: 450000,
    target_amount: 800000,
    color: "#6366f1",
    icon: "🏠",
  },
  {
    id: 2,
    name: "Отпуск",
    current_amount: 95000,
    target_amount: 200000,
    color: "#8b5cf6",
    icon: "✈️",
  },
];

async function getAccessToken(): Promise<string> {
  const res = await fetch(`${PULSE_API}/auth/refresh`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ refresh_token: PULSE_REFRESH }),
  });
  if (!res.ok) throw new Error("Refresh failed");
  const data = await res.json();
  return data.access_token;
}

export async function GET() {
  if (!PULSE_REFRESH) {
    return NextResponse.json({ savings: MOCK_SAVINGS, demo: true });
  }

  try {
    const token = await getAccessToken();
    const res = await fetch(`${PULSE_API}/savings`, {
      headers: { Authorization: `Bearer ${token}` },
      next: { revalidate: 300 },
    });

    if (!res.ok) throw new Error(`Pulse responded ${res.status}`);
    const data = await res.json();
    return NextResponse.json({ savings: Array.isArray(data) ? data : [] });
  } catch (e) {
    return NextResponse.json({ savings: MOCK_SAVINGS, demo: true });
  }
}