import { useEffect, useState, useCallback } from 'react';
import { Dashboard } from '@/components/layout';
import { ThermostatOverlay } from '@/components/climate';
import { LightsOverlay } from '@/components/lights';
import { LocksOverlay } from '@/components/locks';
import { ControlsOverlay } from '@/components/controls';
import { CalendarWidget } from '@/components/calendar';
import { TodoWidget } from '@/components/todo';
import { ChoreChart } from '@/components/chores';
import { SettingsPanel, ConnectionModal } from '@/components/settings';
import { CameraOverlay } from '@/components/cameras';
import { CameraFeed } from '@/components/cameras/CameraFeed';
import { JellyfinOverlay } from '@/components/media';
import { GlobalKeyboard } from '@/components/keyboard';
import { PhotoFrame } from '@/components/photoframe';
import { useHomeAssistant } from '@/hooks';
import { useIdle } from '@/hooks/useIdle';
import { useHAStore } from '@/stores/haStore';
import { useUIStore, useCameraOverlay } from '@/stores/uiStore';
import { useSettingsStore } from '@/stores/settingsStore';
import { env } from '@/config/environment';


// Person detection alert overlay - shows for 30 seconds when person detected on any configured camera
function PersonAlert({ cameraName, onClose }: { cameraName: string; onClose: () => void }) {
  const cameras = useSettingsStore((state) => state.config.cameras);
  const cameraLower = cameraName.toLowerCase();
  const camera = cameras.find(
    (c) => c.frigateCamera?.toLowerCase() === cameraLower || c.name.toLowerCase() === cameraLower,
  );

  useEffect(() => {
    const timer = setTimeout(onClose, 30000);
    return () => clearTimeout(timer);
  }, [onClose]);

  if (!camera) return null;

  return (
    <div className="fixed inset-0 z-50 bg-black flex flex-col">
      <div className="h-14 bg-dark-secondary border-b border-status-warning flex items-center justify-between px-5">
        <div className="flex items-center gap-3">
          <div className="w-3 h-3 rounded-full bg-status-warning animate-pulse" />
          <h2 className="text-lg font-semibold text-status-warning">
            Person Detected - {camera.displayName}
          </h2>
        </div>
        <button
          onClick={onClose}
          className="p-2 hover:bg-dark-hover rounded-xl transition-colors"
        >
          <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
          </svg>
        </button>
      </div>
      <div className="flex-1 p-2">
        <CameraFeed
          camera={camera}
          className="w-full h-full"
          showLabel={false}
        />
      </div>
    </div>
  );
}

function ConnectionPrompt() {
  const openSettings = useUIStore((state) => state.openSettings);

  return (
    <div className="h-screen w-screen flex items-center justify-center bg-imperial-black">
      <div className="card-imperial max-w-md text-center">
        <div className="w-20 h-20 rounded-full bg-imperial-red mx-auto mb-6 flex items-center justify-center">
          <svg className="w-10 h-10 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
          </svg>
        </div>
        <h1 className="font-display text-2xl uppercase tracking-wider text-imperial-red mb-4">
          Imperial Command Center
        </h1>
        <p className="text-gray-400 mb-6">
          Enter your Home Assistant long-lived access token to connect.
        </p>
        <button onClick={openSettings} className="btn-primary">
          Configure Connection
        </button>
      </div>
    </div>
  );
}

function DashboardContent() {
  const config = useSettingsStore((state) => state.config);

  return (
    <div className="col-span-12 flex flex-row gap-3 min-h-0">
      {config.calendar && (
        <div className="flex-[4] min-w-0">
          <CalendarWidget />
        </div>
      )}
      <div className="flex-1 min-w-0 flex flex-col gap-3">
        {config.todoList && (
          <div className="flex-1 min-h-0">
            <TodoWidget />
          </div>
        )}
        <div className="flex-1 min-h-0">
          <ChoreChart />
        </div>
      </div>
    </div>
  );
}

export default function App() {
  const { connectionState } = useHomeAssistant();
  const accessToken = useHAStore((state) => state.accessToken);
  const connect = useHAStore((state) => state.connect);
  const settingsOpen = useUIStore((state) => state.settingsOpen);
  const lightsOverlayOpen = useUIStore((state) => state.lightsOverlayOpen);
  const locksOverlayOpen = useUIStore((state) => state.locksOverlayOpen);
  const thermostatsOverlayOpen = useUIStore((state) => state.thermostatsOverlayOpen);
  const mediaOverlayOpen = useUIStore((state) => state.mediaOverlayOpen);
  const controlsOverlayOpen = useUIStore((state) => state.controlsOverlayOpen);
  const { isOpen: cameraOverlayOpen } = useCameraOverlay();
  const isIdle = useIdle(env.photoFrameIdleTimeout);

  // Person detection alert state (via MQTT from Electron main process)
  const [alertCamera, setAlertCamera] = useState<string | null>(null);

  // Report touch/click activity to main process for screen wake on Wayland
  useEffect(() => {
    const handleActivity = () => {
      if (window.electronAPI?.screen?.activity) {
        window.electronAPI.screen.activity();
      }
    };

    // Listen for any touch or click events
    document.addEventListener('touchstart', handleActivity, { passive: true });
    document.addEventListener('mousedown', handleActivity, { passive: true });

    return () => {
      document.removeEventListener('touchstart', handleActivity);
      document.removeEventListener('mousedown', handleActivity);
    };
  }, []);

  // Auto-connect if token is stored (check localStorage first, then config file)
  useEffect(() => {
    const initConfig = async () => {
      // Load HA token
      let storedToken = localStorage.getItem('ha_access_token');

      // If no token in localStorage, try to get from config file
      if (!storedToken && window.electronAPI?.config?.getStoredToken) {
        const fileToken = await window.electronAPI.config.getStoredToken();
        if (fileToken) {
          storedToken = fileToken;
          localStorage.setItem('ha_access_token', fileToken);
        }
      }

      if (storedToken && !accessToken) {
        connect(storedToken);
      }

      // Load Jellyfin API key from config file
      if (window.electronAPI?.config?.getJellyfinApiKey) {
        const jellyfinKey = await window.electronAPI.config.getJellyfinApiKey();
        if (jellyfinKey) {
          useSettingsStore.getState().setJellyfinApiKey(jellyfinKey);
        }
      }
    };

    initConfig();
  }, [accessToken, connect]);

  // Listen for person detection via MQTT (from Electron main process)
  useEffect(() => {
    const api = window.electronAPI;
    if (!api?.frigate?.onPersonDetected) return;
    const unsub = api.frigate.onPersonDetected((camera: string) => {
      setAlertCamera(camera);
      useUIStore.getState().setIdle(false);
    });
    return unsub;
  }, []);

  const closePersonAlert = useCallback(() => {
    setAlertCamera(null);
  }, []);

  // Set up screen idle timeout
  useEffect(() => {
    if (window.electronAPI) {
      window.electronAPI.screen.setIdleTimeout(env.screenIdleTimeout);
    }
  }, []);

  // Show connection prompt if no token
  if (!accessToken) {
    return (
      <>
        <ConnectionPrompt />
        {settingsOpen && <ConnectionModal />}
      </>
    );
  }

  // Show loading state
  if (connectionState === 'connecting') {
    return (
      <div className="h-screen w-screen flex items-center justify-center bg-dark-primary">
        <div className="text-center">
          <div className="w-16 h-16 border-4 border-accent border-t-transparent rounded-full animate-spin mx-auto mb-4" />
          <p className="text-lg text-accent">
            Connecting to Home Assistant...
          </p>
        </div>
      </div>
    );
  }

  // Show error state
  if (connectionState === 'error') {
    return (
      <div className="h-screen w-screen flex items-center justify-center bg-dark-primary">
        <div className="widget max-w-md text-center p-8">
          <div className="w-20 h-20 rounded-full bg-status-error mx-auto mb-6 flex items-center justify-center">
            <svg className="w-10 h-10 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
            </svg>
          </div>
          <h2 className="text-xl font-semibold text-status-error mb-4">
            Connection Error
          </h2>
          <p className="text-gray-400 mb-6">
            Failed to connect to Home Assistant. Please check your configuration.
          </p>
          <button onClick={() => window.location.reload()} className="btn btn-primary">
            Retry Connection
          </button>
        </div>
      </div>
    );
  }

  return (
    <>
      <Dashboard>
        <DashboardContent />
      </Dashboard>
      {lightsOverlayOpen && <LightsOverlay />}
      {locksOverlayOpen && <LocksOverlay />}
      {thermostatsOverlayOpen && <ThermostatOverlay />}
      {mediaOverlayOpen && <JellyfinOverlay />}
      {controlsOverlayOpen && <ControlsOverlay />}
      {cameraOverlayOpen && <CameraOverlay />}
      {settingsOpen && <SettingsPanel />}
      {isIdle && !alertCamera && <PhotoFrame intervalMs={env.photoFrameInterval} />}
      {alertCamera && <PersonAlert cameraName={alertCamera} onClose={closePersonAlert} />}
      <GlobalKeyboard />
    </>
  );
}