import { RouterProvider } from '@tanstack/react-router';
import { useEffect, useRef, useState } from 'react';
import voiceboxLogo from '@/assets/voicebox-logo.png';
import ShinyText from '@/components/ShinyText';
import { TitleBarDragRegion } from '@/components/TitleBarDragRegion';
import { useAutoUpdater } from '@/hooks/useAutoUpdater';
import { TOP_SAFE_AREA_PADDING } from '@/lib/constants/ui';
import { cn } from '@/lib/utils/cn';
import { usePlatform } from '@/platform/PlatformContext';
import { router } from '@/router';
import { useLogStore } from '@/stores/logStore';
import { useServerStore } from '@/stores/serverStore';

const LOADING_MESSAGES = [
  'Warming up tensors...',
  'Calibrating synthesizer engine...',
  'Initializing voice models...',
  'Loading neural networks...',
  'Preparing audio pipelines...',
  'Optimizing waveform generators...',
  'Tuning frequency analyzers...',
  'Building voice embeddings...',
  'Configuring text-to-speech cores...',
  'Syncing audio buffers...',
  'Establishing model connections...',
  'Preprocessing training data...',
  'Validating voice samples...',
  'Compiling inference engines...',
  'Mapping phoneme sequences...',
  'Aligning prosody parameters...',
  'Activating speech synthesis...',
  'Fine-tuning acoustic models...',
  'Preparing voice cloning matrices...',
  'Initializing Qwen TTS framework...',
];

function App() {
  const platform = usePlatform();
  const [serverReady, setServerReady] = useState(false);
  const [loadingMessageIndex, setLoadingMessageIndex] = useState(0);
  const serverStartingRef = useRef(false);

  // Automatically check for app updates on startup and show toast notifications
  useAutoUpdater({ checkOnMount: true, showToast: true });

  // Sync stored setting to Rust on startup
  useEffect(() => {
    if (platform.metadata.isTauri) {
      const keepRunning = useServerStore.getState().keepServerRunningOnClose;
      platform.lifecycle.setKeepServerRunning(keepRunning).catch((error) => {
        console.error('Failed to sync initial setting to Rust:', error);
      });
    }
    // Empty dependency array - platform is stable from context, only run once
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [platform.metadata.isTauri, platform.lifecycle]);

  // Setup lifecycle callbacks
  useEffect(() => {
    platform.lifecycle.onServerReady = () => {
      setServerReady(true);
    };
    // Empty dependency array - platform is stable from context, only run once
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [platform.lifecycle]);

  // Subscribe to server logs
  useEffect(() => {
    const unsubscribe = platform.lifecycle.subscribeToServerLogs((entry) => {
      useLogStore.getState().addEntry(entry);
    });
    return unsubscribe;
  }, [platform.lifecycle]);

  // Setup window close handler and auto-start server when running in Tauri (production only)
  useEffect(() => {
    if (!platform.metadata.isTauri) {
      setServerReady(true); // Web assumes server is running
      return;
    }

    // Setup window close handler to check setting and stop server if needed
    // This works in both dev and prod, but will only stop server if it was started by the app
    platform.lifecycle.setupWindowCloseHandler().catch((error) => {
      console.error('Failed to setup window close handler:', error);
    });

    // Only auto-start server in production mode
    // In dev mode, user runs server separately
    if (!import.meta.env?.PROD) {
      console.log('Dev mode: Skipping auto-start of server (run it separately)');
      setServerReady(true); // Mark as ready so UI doesn't show loading screen
      // Mark that server was not started by app (so we don't try to stop it on close)
      // @ts-expect-error - adding property to window
      window.__voiceboxServerStartedByApp = false;
      return;
    }

    // Auto-start server in production
    if (serverStartingRef.current) {
      return;
    }

    serverStartingRef.current = true;
    const isRemote = useServerStore.getState().mode === 'remote';
    const customModelsDir = useServerStore.getState().customModelsDir;
    console.log(`Production mode: Starting bundled server... (remote: ${isRemote})`);

    platform.lifecycle
      .startServer(isRemote, customModelsDir)
      .then((serverUrl) => {
        console.log('Server is ready at:', serverUrl);
        // Update the server URL in the store with the dynamically assigned port
        useServerStore.getState().setServerUrl(serverUrl);
        setServerReady(true);
        // Mark that we started the server (so we know to stop it on close)
        // @ts-expect-error - adding property to window
        window.__voiceboxServerStartedByApp = true;
      })
      .catch((error) => {
        console.error('Failed to auto-start server:', error);
        serverStartingRef.current = false;
        // @ts-expect-error - adding property to window
        window.__voiceboxServerStartedByApp = false;
      });

    // Cleanup: stop server on actual unmount (not StrictMode remount)
    // Note: Window close is handled separately in Tauri Rust code
    return () => {
      // Window close event handles server shutdown based on setting
      serverStartingRef.current = false;
    };
    // Empty dependency array - platform is stable from context, only run once
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [platform.metadata.isTauri, platform.lifecycle]);

  // Cycle through loading messages every 3 seconds
  useEffect(() => {
    if (!platform.metadata.isTauri || serverReady) {
      return;
    }

    const interval = setInterval(() => {
      setLoadingMessageIndex((prev) => (prev + 1) % LOADING_MESSAGES.length);
    }, 3000);

    return () => clearInterval(interval);
  }, [serverReady, platform.metadata.isTauri]);

  // Show loading screen while server is starting in Tauri
  if (platform.metadata.isTauri && !serverReady) {
    return (
      <div
        className={cn(
          'min-h-screen bg-background flex items-center justify-center',
          TOP_SAFE_AREA_PADDING,
        )}
      >
        <TitleBarDragRegion />
        <div className="text-center space-y-6">
          <div className="flex justify-center relative">
            <div className="absolute inset-0 flex items-center justify-center">
              <div className="w-48 h-48 rounded-full bg-accent/20 blur-3xl" />
            </div>
            <img
              src={voiceboxLogo}
              alt="Voicebox"
              className="w-48 h-48 object-contain animate-fade-in-scale relative z-10"
            />
          </div>
          <div className="animate-fade-in-delayed">
            <ShinyText
              text={LOADING_MESSAGES[loadingMessageIndex]}
              className="text-lg font-medium text-muted-foreground"
              speed={2}
              color="hsl(var(--muted-foreground))"
              shineColor="hsl(var(--foreground))"
            />
          </div>
        </div>
      </div>
    );
  }

  return <RouterProvider router={router} />;
}

export default App;