import { NextResponse } from "next/server";

const TZ = "Asia/Kolkata";

/**
 * GET /api/time
 * Returns the server's current time in IST.  The app can call this to verify
 * that the user's device clock matches the server, and to use a trusted
 * timestamp source for log entries if needed.
 *
 * No auth required — time is not sensitive.
 */
export async function GET() {
  const now = new Date();

  const istDate = now.toLocaleDateString("sv-SE", { timeZone: TZ });   // YYYY-MM-DD
  const istTime = now.toLocaleTimeString("en-IN", {
    timeZone: TZ,
    hour: "2-digit",
    minute: "2-digit",
    second: "2-digit",
    hour12: false,
  });
  const istLabel = now.toLocaleString("en-IN", {
    timeZone: TZ,
    weekday: "short",
    day: "numeric",
    month: "short",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
    hour12: true,
  });

  return NextResponse.json(
    {
      utc:      now.toISOString(),          // e.g. "2026-05-28T09:00:00.000Z"
      istDate,                              // e.g. "2026-05-28"
      istTime,                              // e.g. "14:30:00"
      ist:      istLabel,                   // e.g. "Wed, 28 May 2026, 02:30 PM"
      offsetMinutes: 330,                   // IST = UTC +5:30
    },
    {
      headers: {
        // Do not cache — always return live server time
        "Cache-Control": "no-store",
      },
    }
  );
}