import { NextResponse } from "next/server";
import { cookies } from "next/headers";
import {
  validateToken,
  isTokenExpired,
  getTimeUntilExpiration,
} from "@/app/utils/auth";

export async function GET() {
  try {
    const cookieStore = await cookies();
    const token = cookieStore.get("auth_token")?.value;

    if (!token) {
      return NextResponse.json(
        {
          isAuthenticated: false,
          message: "No authentication token found",
        },
        { status: 401 }
      );
    }

    // Validate the token
    const payload = await validateToken(token);

    if (!payload) {
      return NextResponse.json(
        {
          isAuthenticated: false,
          message: "Invalid authentication token",
        },
        { status: 401 }
      );
    }

    if (isTokenExpired(payload)) {
      // Clear the expired cookie
      cookieStore.delete("auth_token");

      return NextResponse.json(
        {
          isAuthenticated: false,
          message: "Authentication token has expired",
        },
        { status: 401 }
      );
    }

    // Token is valid and not expired
    const timeUntilExpiration = getTimeUntilExpiration(payload);

    return NextResponse.json({
      isAuthenticated: true,
      user: {
        email: payload.email,
        role: payload.role,
      },
      tokenInfo: {
        issuedAt: new Date(payload.iat * 1000).toISOString(),
        expiresAt: new Date(payload.exp * 1000).toISOString(),
        timeUntilExpiration: timeUntilExpiration, // in seconds
        expiresInHours: Math.floor(timeUntilExpiration / 3600),
      },
    });
  } catch (error) {
    console.error("Auth status check error:", error);
    return NextResponse.json(
      {
        isAuthenticated: false,
        message: "Internal server error",
      },
      { status: 500 }
    );
  }
}