Platform Support

private detectPlatform(): Platform {
  if (typeof window === 'undefined' || typeof navigator === 'undefined') {
    return Platform.Generic;
  }

  const userAgent = navigator.userAgent;
  const win = window as any;

  // Check global objects first (most reliable)
  if (win.tizen) {
    return Platform.Tizen;
  }

  if (win.webOS || win.PalmSystem) {
    return Platform.WebOS;
  }

  // Fall back to user agent pattern matching
  for (const [platform, patterns] of Object.entries(PLATFORM_DETECTION_PATTERNS)) {
    for (const pattern of patterns) {
      if (pattern.test(userAgent)) {
        return platform as Platform;
      }
    }
  }

  return Platform.Generic;
}

interface PlatformCapabilities {
  // Network APIs
  sendBeacon: boolean;              // navigator.sendBeacon() support
  fetchKeepalive: boolean;          // fetch() with keepalive option
  
  // Video playback
  mutedAutoplayRequired: boolean;   // Must use muted autoplay
  fullscreen: boolean;              // Fullscreen API support
  
  // Hardware info
  hardwareDecodeInfo: boolean;      // Access to hardware decode info
  
  // Video formats
  hdr: boolean;                     // HDR playback
  hdr10Plus: boolean;               // HDR10+ support
  dolbyVision: boolean;             // Dolby Vision support
  dolbyAtmos: boolean;              // Dolby Atmos audio
  hevc: boolean;                    // HEVC/H.265 codec
  vp9: boolean;                     // VP9 codec
  av1: boolean;                     // AV1 codec
  
  // Resolution
  maxResolution: '4k' | '1080p' | '720p' | 'unknown';
  
  // Input
  touch: boolean;                   // Touchscreen support
  voice: boolean;                   // Voice control support
}

import { getPlatformAdapter } from 'adgent-sdk';

const adapter = getPlatformAdapter();

// Check if Beacon API is available for tracking
if (adapter.capabilities.sendBeacon) {
  console.log('Using sendBeacon for tracking pixels');
}

// Check codec support
if (adapter.capabilities.hevc) {
  console.log('HEVC/H.265 supported, can use higher compression');
}

// Check HDR support
if (adapter.capabilities.hdr) {
  console.log('HDR playback available');
}

// Get maximum resolution
const maxRes = adapter.capabilities.maxResolution;
console.log(`Maximum supported resolution: ${maxRes}`);

enum KeyAction {
  // Navigation
  Enter = 'enter',
  Back = 'back',
  Left = 'left',
  Right = 'right',
  Up = 'up',
  Down = 'down',
  
  // Playback
  Play = 'play',
  Pause = 'pause',
  PlayPause = 'playPause',
  Stop = 'stop',
  FastForward = 'fastForward',
  Rewind = 'rewind',
  
  // Functions
  Menu = 'menu',
  Info = 'info',
  
  // Color buttons
  Red = 'red',
  Green = 'green',
  Yellow = 'yellow',
  Blue = 'blue',
  
  // Volume/Channel
  ChannelUp = 'channelUp',
  ChannelDown = 'channelDown',
  VolumeUp = 'volumeUp',
  VolumeDown = 'volumeDown',
  Mute = 'mute'
}

import { getPlatformAdapter, KeyAction } from 'adgent-sdk';

const adapter = getPlatformAdapter();

document.addEventListener('keydown', (e) => {
  const action = adapter.normalizeKeyCode(e.keyCode);
  
  if (action === KeyAction.Enter) {
    console.log('User pressed OK/Enter on remote');
  }
  
  if (action === KeyAction.Back) {
    console.log('User pressed Back button');
  }
});

public registerTizenKeys(): void {
  if (this.platform !== Platform.Tizen) return;

  const tizen = (window as any).tizen;
  if (tizen?.tvinputdevice) {
    const keys = [
      'MediaPlay',
      'MediaPause',
      'MediaStop',
      'MediaFastForward',
      'MediaRewind',
      'MediaPlayPause',
      'ColorF0Red',
      'ColorF1Green',
      'ColorF2Yellow',
      'ColorF3Blue',
      'Info'
    ];
    keys.forEach((key) => {
      try {
        tizen.tvinputdevice.registerKey(key);
      } catch {
        // Key may already be registered
      }
    });
  }
}

const attrs = adapter.getVideoAttributes();
// Returns:
{
  muted: true,
  playsinline: true,
  autoplay: true,
  'webkit-playsinline': true,
  'data-samsung-immersive': 'true',  // Tizen only
  'data-lg-immersive': 'true'        // webOS only
}

const settings = adapter.getRecommendedVideoSettings();

const info = adapter.deviceInfo;

console.log(info.platform);          // 'tizen'
console.log(info.manufacturer);      // 'Samsung'
console.log(info.model);             // 'UN65RU7100'
console.log(info.osVersion);         // '5.5'
console.log(info.screenWidth);       // 3840
console.log(info.screenHeight);      // 2160
console.log(info.devicePixelRatio);  // 1

import { getPlatformAdapter } from 'adgent-sdk';

const adapter = getPlatformAdapter();

switch (adapter.platform) {
  case 'tizen':
    console.log('Running on Samsung Tizen TV');
    break;
  case 'webos':
    console.log('Running on LG webOS TV');
    break;
  case 'generic':
    console.log('Running on standard web browser');
    break;
}

const adapter = getPlatformAdapter();

// Use Beacon API if available, fall back to fetch
function fireTrackingPixel(url: string) {
  if (adapter.capabilities.sendBeacon) {
    navigator.sendBeacon(url);
  } else {
    fetch(url, { method: 'GET', keepalive: true });
  }
}

// Adjust quality based on platform
let targetBitrate = 2500; // Default
if (adapter.capabilities.maxResolution === '4k') {
  targetBitrate = 5000; // Higher quality for 4K TVs
}

import { getPlatformAdapter, KeyAction } from 'adgent-sdk';

const adapter = getPlatformAdapter();

// Register Tizen keys if needed
if (adapter.platform === 'tizen') {
  adapter.registerTizenKeys();
}

// Handle key events
document.addEventListener('keydown', (e) => {
  const action = adapter.normalizeKeyCode(e.keyCode);
  
  switch (action) {
    case KeyAction.Enter:
      // Handle OK/Select
      break;
    case KeyAction.Back:
      // Handle Back/Exit
      break;
    case KeyAction.PlayPause:
      // Handle Play/Pause toggle
      break;
  }
});

let platformAdapterInstance: PlatformAdapter | null = null;

export function getPlatformAdapter(): PlatformAdapter {
  if (!platformAdapterInstance) {
    platformAdapterInstance = new PlatformAdapter();
  }
  return platformAdapterInstance;
}