import { Navigate, Route, Routes } from "react-router-dom";
import { useEffect, useState, type ReactNode } from "react";
import Layout from "./components/Layout";
import { useAuth } from "./auth";
import { api } from "./api";
import DemoApp from "./demo/DemoApp";

import Home from "./pages/Home";
import Login from "./pages/Login";
import Register from "./pages/Register";
import MyDogs from "./pages/MyDogs";
import DogDetail from "./pages/DogDetail";
import ReportLost from "./pages/ReportLost";
import ReportFound from "./pages/ReportFound";
import MyCases from "./pages/MyCases";
import CaseDetail from "./pages/CaseDetail";
import NextSteps from "./pages/NextSteps";
import Admin from "./pages/Admin";
import AdminData from "./pages/AdminData";
import AdminDogs from "./pages/AdminDogs";
import AdminCases from "./pages/AdminCases";
import AdminOwners from "./pages/AdminOwners";
import AdminOwnerDetail from "./pages/AdminOwnerDetail";
import AdminPending from "./pages/AdminPending";
import AdminTestMatch from "./pages/AdminTestMatch";
import DatasetDetail from "./pages/DatasetDetail";

function RequireAuth({ children }: { children: ReactNode }) {
  const { user, loading } = useAuth();
  if (loading) return <div className="p-8 text-center text-gray-500">Loading…</div>;
  if (!user) return <Navigate to="/login" replace />;
  return <>{children}</>;
}

export default function App() {
  // On load, ask the backend which UI to render. DEMO_MODE=1 -> the read-only 3-page demo shell;
  // otherwise the full app. (The backend also hard-blocks writes in demo mode — this is just the UI.)
  const [config, setConfig] = useState<{ demo_mode: boolean; haystack_size: number } | null>(null);
  useEffect(() => {
    api
      .getConfig()
      .then(setConfig)
      .catch(() => setConfig({ demo_mode: false, haystack_size: 0 }));
  }, []);

  if (config === null) return <div className="p-8 text-center text-gray-500">Loading…</div>;
  if (config.demo_mode) return <DemoApp haystackSize={config.haystack_size} />;

  return (
    <Layout>
      <Routes>
        <Route path="/" element={<Home />} />
        <Route path="/login" element={<Login />} />
        <Route path="/register" element={<Register />} />
        <Route path="/report/found" element={<ReportFound />} />
        <Route
          path="/dogs"
          element={
            <RequireAuth>
              <MyDogs />
            </RequireAuth>
          }
        />
        <Route
          path="/dogs/:id"
          element={
            <RequireAuth>
              <DogDetail />
            </RequireAuth>
          }
        />
        <Route
          path="/report/lost"
          element={
            <RequireAuth>
              <ReportLost />
            </RequireAuth>
          }
        />
        <Route
          path="/cases"
          element={
            <RequireAuth>
              <MyCases />
            </RequireAuth>
          }
        />
        <Route
          path="/cases/:id"
          element={
            <RequireAuth>
              <CaseDetail />
            </RequireAuth>
          }
        />
        <Route
          path="/matches/:id/reclaim"
          element={
            <RequireAuth>
              <NextSteps />
            </RequireAuth>
          }
        />
        <Route
          path="/admin"
          element={
            <RequireAuth>
              <Admin />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/data"
          element={
            <RequireAuth>
              <AdminData />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/dogs"
          element={
            <RequireAuth>
              <AdminDogs />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/pending"
          element={
            <RequireAuth>
              <AdminPending />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/cases"
          element={
            <RequireAuth>
              <AdminCases />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/owners"
          element={
            <RequireAuth>
              <AdminOwners />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/owners/:id"
          element={
            <RequireAuth>
              <AdminOwnerDetail />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/test-match"
          element={
            <RequireAuth>
              <AdminTestMatch />
            </RequireAuth>
          }
        />
        <Route
          path="/admin/data/:id"
          element={
            <RequireAuth>
              <DatasetDetail />
            </RequireAuth>
          }
        />
        <Route path="*" element={<Navigate to="/" replace />} />
      </Routes>
    </Layout>
  );
}