import { isRouteErrorResponse, Outlet } from "react-router";
import "./app.css";

export default function Root() {
  return <Outlet />;
}

export function ErrorBoundary({ error }: any) {
  let status = 500;
  let heading = "Something went wrong";
  let message = "An unexpected error occurred. Please try again.";
  let stack: string | undefined;

  if (isRouteErrorResponse(error)) {
    status = error.status;
    if (status === 404) {
      heading = "Page not found";
      message = "The page you're looking for doesn't exist or has been moved.";
    } else {
      heading = `${status} Error`;
      message = error.statusText || message;
    }
  } else if (error instanceof Error) {
    message = error.message;
    stack = error.stack;
  }

  const is404 = status === 404;

  return (
    <main className="flex min-h-screen flex-col items-center justify-center px-6 py-24">
      <div className="text-center">
        <p
          className="font-mono text-[8rem] font-bold leading-none tracking-tighter"
          style={{
            background: is404
              ? "linear-gradient(180deg, var(--color-teal-500) 0%, var(--color-teal-700) 100%)"
              : "linear-gradient(180deg, var(--color-coral) 0%, #a63e3e 100%)",
            WebkitBackgroundClip: "text",
            WebkitTextFillColor: "transparent",
            opacity: 0.8,
          }}
        >
          {status}
        </p>

        <h1 className="mt-4 text-2xl font-semibold tracking-tight text-fg">
          {heading}
        </h1>
        <p className="mt-2 max-w-md text-sm leading-relaxed text-fg-3">
          {message}
        </p>

        <div className="mt-8 flex items-center justify-center gap-3">
          <a
            href="/runs"
            className="inline-flex items-center gap-2 rounded-md border border-teal-500/20 bg-teal-500/10 px-4 py-2 text-sm font-medium text-teal-500 transition-colors hover:border-teal-500/40 hover:bg-teal-500/15 hover:text-fg"
          >
            Go to Runs
          </a>
          <button
            type="button"
            onClick={() => window.history.back()}
            className="inline-flex items-center gap-2 rounded-md border border-line px-4 py-2 text-sm font-medium text-fg-3 transition-colors hover:border-line-strong hover:bg-overlay hover:text-fg"
          >
            Go back
          </button>
        </div>
      </div>

      {stack && (
        <details className="mt-12 w-full max-w-3xl">
          <summary className="cursor-pointer text-xs font-medium text-fg-muted transition-colors hover:text-fg-3">
            Stack trace
          </summary>
          <pre className="mt-2 max-h-64 overflow-auto rounded-lg border border-line bg-panel/60 p-4 font-mono text-xs leading-relaxed text-fg-3">
            <code>{stack}</code>
          </pre>
        </details>
      )}
    </main>
  );
}
