import { FunctionDeclaration, Type } from '@google/genai';
import { StorageService } from '../services/storageService';

export const SYSTEM_TOOLS: FunctionDeclaration[] = [
  {
    name: 'configure_system',
    parameters: {
      type: Type.OBJECT,
      description: 'Changes system settings like theme, focus mode, or language.',
      properties: {
        setting: { type: Type.STRING, enum: ['focus_mode', 'theme', 'language'] },
        value: { type: Type.STRING, description: 'Value for the setting (e.g., "on/off", "dark/light", "nepali/english").' }
      },
      required: ['setting', 'value']
    }
  },
  {
    name: 'open_external_link',
    parameters: {
      type: Type.OBJECT,
      description: 'Opens external websites, plays songs, or performs searches. For "Play [Song]", this uses a smart redirect to the video.',
      properties: {
        platform: { type: Type.STRING, description: 'The platform name (youtube, google, facebook, instagram, twitter, linkedin, spotify, wikipedia, etc.).' },
        action: { type: Type.STRING, enum: ['open', 'search', 'play'], description: 'The intent. Use "play" for media which attempts direct playback.' },
        query: { type: Type.STRING, description: 'The search term, song name, or content title.' }
      },
      required: ['platform']
    }
  },
  {
    name: 'adjust_device_hardware',
    parameters: {
      type: Type.OBJECT,
      description: 'Request to change device brightness or volume. Returns a placeholder response.',
      properties: {
        feature: { type: Type.STRING, enum: ['brightness', 'volume'] },
        value: { type: Type.NUMBER, description: 'The target level percentage (0-100).' }
      },
      required: ['feature']
    }
  },
  {
    name: 'terminate_voice_session',
    parameters: {
        type: Type.OBJECT,
        description: 'Ends the current voice conversation/link without logging out. Use when user says "stop listening", "terminate session", "cut link", "bye".',
        properties: {}
    }
  },
  {
    name: 'system_logout',
    parameters: {
        type: Type.OBJECT,
        description: 'Logs the user out of the application completely. Requires explicit "Logout" command.',
        properties: {}
    }
  }
];

export const executeSystemTool = async (name: string, args: any, navigate: (path: string) => void) => {
  if (name === 'configure_system') {
    if (args.setting === 'focus_mode') {
        const turnOn = args.value.includes('on') || args.value.includes('active') || args.value.includes('start');
        localStorage.setItem('rudraksha_focus_mode', turnOn ? 'true' : 'false');
        window.dispatchEvent(new Event('rudraksha-focus-update'));
        return { result: `Focus Mode ${turnOn ? 'Activated' : 'Deactivated'}.` };
    }

    if (args.setting === 'theme') {
        const isDark = args.value.includes('dark') || args.value.includes('night');
        const profile = await StorageService.getProfile();
        if (profile) {
            const newTheme = isDark ? 'theme_midnight' : 'default';
            await StorageService.updateProfile({ activeTheme: newTheme });
            window.dispatchEvent(new Event('rudraksha-profile-update'));
            return { result: `Switched to ${isDark ? 'Dark' : 'Light'} visual theme.` };
        }
    }

    if (args.setting === 'language') {
        const isNepali = args.value.toLowerCase().includes('nep');
        localStorage.setItem('rudraksha_lang', isNepali ? 'ne' : 'en');
        window.location.reload(); 
        return { result: `Switching language to ${isNepali ? 'Nepali' : 'English'}...` };
    }
  }

  if (name === 'open_external_link') {
    const p = args.platform.toLowerCase();
    const q = args.query ? args.query.trim() : '';
    const encodedQ = encodeURIComponent(q);
    let url = 'https://www.google.com';

    // Safety Check (Basic SFW Filter)
    const unsafeKeywords = ['porn', 'xxx', 'nsfw', 'sex', 'nude', 'erotic'];
    if (unsafeKeywords.some(keyword => q.toLowerCase().includes(keyword))) {
        return { result: "Access denied. Safety protocol active. Request contains unsafe content." };
    }

    // Dynamic Platform Handling
    if (p.includes('youtube')) {
      if (args.action === 'play' && q) {
          // "I'm Feeling Lucky" logic to try and jump directly to the video
          // Queries "site:youtube.com [query]" and presses the Lucky button.
          // This often redirects to the first video result directly.
          url = `https://www.google.com/search?q=site%3Ayoutube.com+${encodedQ}&btnI=1`;
      } else if (q) {
          url = `https://www.youtube.com/results?search_query=${encodedQ}`;
      } else {
          url = 'https://www.youtube.com';
      }
    } else if (p.includes('google')) {
      url = q ? `https://www.google.com/search?q=${encodedQ}` : 'https://www.google.com';
    } else if (p.includes('facebook')) {
      url = 'https://www.facebook.com';
    } else if (p.includes('instagram')) {
      url = 'https://www.instagram.com';
    } else if (p.includes('twitter') || p.includes('x.com')) {
      url = 'https://twitter.com';
    } else if (p.includes('linkedin')) {
      url = 'https://www.linkedin.com';
    } else if (p.includes('wikipedia')) {
      url = q ? `https://en.wikipedia.org/wiki/${encodedQ}` : 'https://www.wikipedia.org';
    } else if (p.includes('tiktok')) {
      url = 'https://www.tiktok.com';
    } else if (p.includes('spotify')) {
      url = q ? `https://open.spotify.com/search/${encodedQ}` : 'https://open.spotify.com';
    } else {
      url = `https://www.google.com/search?q=${p}+${q}`;
    }

    window.open(url, '_blank');
    return { result: `System order executed: Opening ${args.platform} ${args.action === 'play' ? 'content' : 'interface'}.` };
  }

  if (name === 'adjust_device_hardware') {
    return { result: "Feature coming soon. Hardware bridge not connected." };
  }

  // Handle special termination/logout actions in the UI layer (RudraAI.tsx) via event or return signal
  if (name === 'terminate_voice_session') {
      return { result: "TERMINATE_SIGNAL" }; // Special signal for UI to close connection
  }

  if (name === 'system_logout') {
      return { result: "LOGOUT_SIGNAL" }; // Special signal for UI to perform logout
  }

  return null;
};