import React from 'react';
import { HashRouter, Routes, Route, Navigate, useParams } from 'react-router-dom';
import { ThemeProvider } from './contexts/ThemeContext';
import { AuthProvider, useAuth } from './contexts/AuthContext';
import { UserOrganizationsProvider, useUserOrganizations } from './contexts/UserOrganizationsContext';
import { OrgProvider, useOrg } from './contexts/OrgContext';
import { Layout } from './components/UiKit';
import CompanyWiki from './pages/CompanyWiki';
import EmployeeData from './pages/EmployeeData';
import Chat from './pages/Chat';
import HelpAndSettings from './pages/HelpAndSettings';
import Login from './pages/Login';
import ModernLogin from './pages/ModernLogin';
import OrgSelection from './pages/OrgSelection';
import Onboarding from './pages/Onboarding';
import EmployeeQuestionnaire from './pages/EmployeeQuestionnaire';
import EmployeeQuestionnaireSteps from './pages/EmployeeQuestionnaireSteps';
import QuestionTypesDemo from './pages/QuestionTypesDemo';
import FormsDashboard from './pages/FormsDashboard';
import DebugEmployee from './pages/DebugEmployee';
import QuestionnaireComplete from './pages/QuestionnaireComplete';
import SubscriptionSetup from './pages/SubscriptionSetup';
import { isFirebaseConfigured } from './services/firebase';

const RequireAuth: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const { user, loading } = useAuth();

  if (loading) return <div className="p-8">Loading...</div>;
  if (!user) return <Navigate to="/login" replace />;
  return <>{children}</>;
};

const RequireOrgSelection: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const { selectedOrgId, loading } = useUserOrganizations();

  if (loading) return <div className="p-8">Loading your organizations...</div>;
  if (!selectedOrgId) return <Navigate to="/org-selection" replace />;
  return <>{children}</>;
};

const RequireOnboarding: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const { org } = useOrg();
  const { user } = useAuth();
  const { organizations } = useUserOrganizations();

  if (!org) return <div className="p-8">Loading organization...</div>;

  if (!org.onboardingCompleted) {
    // Only org owners should be redirected to onboarding
    const userOrgRelation = organizations.find(o => o.orgId === org.orgId);
    const isOrgOwner = userOrgRelation?.role === 'owner';

    if (isOrgOwner) {
      return <Navigate to="/onboarding" replace />;
    } else {
      // Non-owners should see a waiting message
      return (
        <div className="p-8 text-center">
          <h2 className="text-xl font-semibold mb-4">Organization Setup In Progress</h2>
          <p className="text-gray-600">
            Your organization is currently being set up by the administrator.
            Please check back later or contact your administrator for more information.
          </p>
        </div>
      );
    }
  }

  return <>{children}</>;
};

// Wrapper component that provides selected org to OrgProvider
const OrgProviderWrapper: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const { selectedOrgId } = useUserOrganizations();

  if (!selectedOrgId) {
    return <div className="p-8">No organization selected</div>;
  }

  return (
    <OrgProvider selectedOrgId={selectedOrgId}>
      {children}
    </OrgProvider>
  );
};

// Redirect invite URLs directly to employee questionnaire (no auth needed)
const InviteRedirect: React.FC = () => {
  const { inviteCode } = useParams<{ inviteCode: string }>();
  return <Navigate to={`/employee-form/${inviteCode}`} replace />;
};

function App() {
  return (
    <ThemeProvider>
      <AuthProvider>
        <UserOrganizationsProvider>
          <HashRouter>
            <Routes>
              <Route path="/login" element={<ModernLogin />} />
              <Route path="/login/:inviteCode" element={<ModernLogin />} />
              <Route path="/invite/:inviteCode" element={<InviteRedirect />} />
              <Route path="/legacy-login" element={<Login />} />

              {/* Employee questionnaire - no auth needed, uses invite code */}
              <Route path="/employee-form/:inviteCode" element={<EmployeeQuestionnaire />} />

              {/* Organization Selection - after auth, before entering app */}
              <Route
                path="/org-selection"
                element={
                  <RequireAuth>
                    <OrgSelection />
                  </RequireAuth>
                }
              />

              {/* Subscription Setup - after organization creation */}
              <Route
                path="/subscription-setup"
                element={
                  <RequireAuth>
                    <SubscriptionSetup />
                  </RequireAuth>
                }
              />

              {/* Routes that require both auth and org selection */}
              <Route
                path="/employee-questionnaire"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <EmployeeQuestionnaire />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />

              <Route
                path="/employee-questionnaire-steps"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <EmployeeQuestionnaireSteps />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />

              <Route
                path="/onboarding"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <Onboarding />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />

              <Route path="/questionnaire-complete" element={<QuestionnaireComplete />} />

              {/* Main app routes - require auth, org selection, and completed onboarding */}
              <Route
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <RequireOnboarding>
                          <Layout />
                        </RequireOnboarding>
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              >
                <Route path="/" element={<Navigate to="/reports" replace />} />
                <Route path="/company-wiki" element={<CompanyWiki />} />
                <Route path="/submissions" element={<EmployeeData mode="submissions" />} />
                <Route path="/reports" element={<EmployeeData mode="reports" />} />
                <Route path="/chat" element={<Chat />} />
                <Route path="/help" element={<HelpAndSettings />} />
                <Route path="/settings" element={<HelpAndSettings />} />
              </Route>

              {/* Debug routes */}
              <Route
                path="/question-types-demo"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <QuestionTypesDemo />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />
              <Route
                path="/forms-dashboard"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <FormsDashboard />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />
              <Route
                path="/debug-employee"
                element={
                  <RequireAuth>
                    <RequireOrgSelection>
                      <OrgProviderWrapper>
                        <DebugEmployee />
                      </OrgProviderWrapper>
                    </RequireOrgSelection>
                  </RequireAuth>
                }
              />
            </Routes>
          </HashRouter>
        </UserOrganizationsProvider>
      </AuthProvider>
    </ThemeProvider>
  );
}

export default App;