import { ComponentType, ReactElement, ReactNode, Component } from 'react';
import { Insets, NativeSyntheticEvent, StyleProp, ViewProps, ViewStyle } from 'react-native';

export interface WebViewNativeEvent {
  readonly url: string;
  readonly loading: boolean;
  readonly title: string;
  readonly canGoBack: boolean;
  readonly canGoForward: boolean;
}

export interface WebViewIOSLoadRequestEvent extends WebViewNativeEvent {
  target: number;
  lockIdentifier: number;
  navigationType: "click" | "formsubmit" | "backforward" | "reload" | "formresubmit" | "other";
}

export interface WebViewProgressEvent extends WebViewNativeEvent {
  readonly progress: number;
}

export interface WebViewNavigation extends WebViewNativeEvent {
  readonly navigationType:
    | 'click'
    | 'formsubmit'
    | 'backforward'
    | 'reload'
    | 'formresubmit'
    | 'other';
}

export interface WebViewMessage extends WebViewNativeEvent {
  readonly data: string;
}

export interface WebViewError extends WebViewNativeEvent {
  readonly domain?: string;
  readonly code: number;
  readonly description: string;
}

export type WebViewEvent = NativeSyntheticEvent<WebViewNativeEvent>;

export type WebViewNavigationEvent = NativeSyntheticEvent<WebViewNavigation>;

export type WebViewMessageEvent = NativeSyntheticEvent<WebViewMessage>;

export type WebViewErrorEvent = NativeSyntheticEvent<WebViewError>;

export type DataDetectorTypes =
  | 'phoneNumber'
  | 'link'
  | 'address'
  | 'calendarEvent'
  | 'trackingNumber'
  | 'flightNumber'
  | 'lookupSuggestion'
  | 'none'
  | 'all';

export type OverScrollModeType = 'always' | 'content' | 'never';

export interface WebViewSourceUri {
  /**
   * The URI to load in the `WebView`. Can be a local or remote file.
   */
  uri?: string;

  /**
   * The HTTP Method to use. Defaults to GET if not specified.
   * NOTE: On Android, only GET and POST are supported.
   */
  method?: string;

  /**
   * Additional HTTP headers to send with the request.
   * NOTE: On Android, this can only be used with GET requests.
   */
  headers?: {[key: string]: string};

  /**
   * The HTTP body to send with the request. This must be a valid
   * UTF-8 string, and will be sent exactly as specified, with no
   * additional encoding (e.g. URL-escaping or base64) applied.
   * NOTE: On Android, this can only be used with POST requests.
   */
  body?: string;
}

export interface WebViewSourceHtml {
  /**
   * A static HTML page to display in the WebView.
   */
  html?: string;
  /**
   * The base URL to be used for any relative links in the HTML.
   */
  baseUrl?: string;
}

export type WebViewSource = WebViewSourceUri | WebViewSourceHtml;

export interface WebViewNativeConfig {
  /*
    * The native component used to render the WebView.
    */
  component?: ComponentType<WebViewSharedProps>;
  /*
    * Set props directly on the native component WebView. Enables custom props which the
    * original WebView doesn't pass through.
    */
  props?: any;
  /*
    * Set the ViewManager to use for communication with the native side.
    * @platform ios
    */
  viewManager?: any;
}

export interface IOSWebViewProps {
  /**
   * If true, use WKWebView instead of UIWebView.
   * @platform ios
   */
  useWebKit?: boolean;

  /**
   * Boolean value that determines whether the web view bounces
   * when it reaches the edge of the content. The default value is `true`.
   * @platform ios
   */
  bounces?: boolean;

  /**
   * A floating-point number that determines how quickly the scroll view
   * decelerates after the user lifts their finger. You may also use the
   * string shortcuts `"normal"` and `"fast"` which match the underlying iOS
   * settings for `UIScrollViewDecelerationRateNormal` and
   * `UIScrollViewDecelerationRateFast` respectively:
   *
   *   - normal: 0.998
   *   - fast: 0.99 (the default for iOS web view)
   * @platform ios
   */
  decelerationRate?: 'fast' | 'normal' | number;

  /**
   * Boolean value that determines whether scrolling is enabled in the
   * `WebView`. The default value is `true`.
   * @platform ios
   */
  scrollEnabled?: boolean;

  /**
   * If the value of this property is true, the scroll view stops on multiples
   * of the scroll view’s bounds when the user scrolls.
   * The default value is false.
   * @platform ios
   */
  pagingEnabled?: boolean,

  /**
   * The amount by which the web view content is inset from the edges of
   * the scroll view. Defaults to {top: 0, left: 0, bottom: 0, right: 0}.
   * @platform ios
   */
  contentInset?: Insets;

  /**
   * Determines the types of data converted to clickable URLs in the web view's content.
   * By default only phone numbers are detected.
   *
   * You can provide one type or an array of many types.
   *
   * Possible values for `dataDetectorTypes` are:
   *
   * - `'phoneNumber'`
   * - `'link'`
   * - `'address'`
   * - `'calendarEvent'`
   * - `'none'`
   * - `'all'`
   *
   * With the new WebKit implementation, we have three new values:
   * - `'trackingNumber'`,
   * - `'flightNumber'`,
   * - `'lookupSuggestion'`,
   *
   * @platform ios
   */
  dataDetectorTypes?: DataDetectorTypes | DataDetectorTypes[];

  /**
   * Function that allows custom handling of any web view requests. Return
   * `true` from the function to continue loading the request and `false`
   * to stop loading.
   * @platform ios
   */
  onShouldStartLoadWithRequest?: (event: WebViewIOSLoadRequestEvent) => any;

  /**
   * Boolean that determines whether HTML5 videos play inline or use the
   * native full-screen controller. The default value is `false`.
   *
   * **NOTE** : In order for video to play inline, not only does this
   * property need to be set to `true`, but the video element in the HTML
   * document must also include the `webkit-playsinline` attribute.
   * @platform ios
   */
  allowsInlineMediaPlayback?: boolean;
  /**
   * Hide the accessory view when the keyboard is open. Default is false to be
   * backward compatible.
   */
  hideKeyboardAccessoryView?: boolean;
  /**
   * If true, this will be able horizontal swipe gestures when using the WKWebView. The default value is `false`.
   */
  allowsBackForwardNavigationGestures?: boolean;

  /**
   * A Boolean value that determines whether pressing on a link
   * displays a preview of the destination for the link.
   *
   * This property is available on devices that support 3D Touch.
   * In iOS 10 and later, the default value is `true`; before that, the default value is `false`.
   * @platform ios
   */
  allowsLinkPreview?: boolean;
}

export interface AndroidWebViewProps {
  onNavigationStateChange?: (event: WebViewNavigation) => any;
  onContentSizeChange?: (event: WebViewEvent) => any;

  /**
   * https://developer.android.com/reference/android/view/View#OVER_SCROLL_NEVER
   * Sets the overScrollMode. Possible values are:
   *
   * - `'always'` (default)
   * - `'content'`
   * - `'never'`
   *
   * @platform android
   */
  overScrollMode?: OverScrollModeType;

  /**
   * Sets whether Geolocation is enabled. The default is false.
   * @platform android
   */
  geolocationEnabled?: boolean;

  /**
   * Boolean that sets whether JavaScript running in the context of a file
   * scheme URL should be allowed to access content from any origin.
   * Including accessing content from other file scheme URLs
   * @platform android
   */
  allowUniversalAccessFromFileURLs?: boolean;

  /**
   * Sets whether the webview allow access to file system.
   * @platform android
   */
  allowFileAccess?: boolean;

  /**
   * Used on Android only, controls whether form autocomplete data should be saved
   * @platform android
   */
  saveFormDataDisabled?: boolean;

  /*
    * Used on Android only, controls whether the given list of URL prefixes should
    * make {@link com.facebook.react.views.webview.ReactWebViewClient} to launch a
    * default activity intent for those URL instead of loading it within the webview.
    * Use this to list URLs that WebView cannot handle, e.g. a PDF url.
    * @platform android
    */
  urlPrefixesForDefaultIntent?: string[];

  /**
   * Boolean value to enable JavaScript in the `WebView`. Used on Android only
   * as JavaScript is enabled by default on iOS. The default value is `true`.
   * @platform android
   */
  javaScriptEnabled?: boolean;

  /**
   * Boolean value to disable Hardware Acceleration in the `WebView`. Used on Android only
   * as Hardware Acceleration is a feature only for Android. The default value is `false`.
   * @platform android
   */
  androidHardwareAccelerationDisabled?: boolean;

  /**
   * Boolean value to enable third party cookies in the `WebView`. Used on
   * Android Lollipop and above only as third party cookies are enabled by
   * default on Android Kitkat and below and on iOS. The default value is `true`.
   * @platform android
   */
  thirdPartyCookiesEnabled?: boolean;

  /**
   * Boolean value to control whether DOM Storage is enabled. Used only in
   * Android.
   * @platform android
   */
  domStorageEnabled?: boolean;

  /**
   * Sets the user-agent for the `WebView`.
   * @platform android
   */
  userAgent?: string;

  /**
   * Specifies the mixed content mode. i.e WebView will allow a secure origin to load content from any other origin.
   *
   * Possible values for `mixedContentMode` are:
   *
   * - `'never'` (default) - WebView will not allow a secure origin to load content from an insecure origin.
   * - `'always'` - WebView will allow a secure origin to load content from any other origin, even if that origin is insecure.
   * - `'compatibility'` -  WebView will attempt to be compatible with the approach of a modern web browser with regard to mixed content.
   * @platform android
   */
  mixedContentMode?: 'never' | 'always' | 'compatibility';
}

export interface WebViewSharedProps extends ViewProps, IOSWebViewProps, AndroidWebViewProps {
  /**
   * @Deprecated. Use `source` instead.
   */
  url?: string;
  /**
   * @Deprecated. Use `source` instead.
   */
  html?: string;

  /**
   * Loads static html or a uri (with optional headers) in the WebView.
   */
  source?: WebViewSource;

  /**
   * Function that returns a view to show if there's an error.
   */
  renderError?: (errorDomain: string | undefined, errorCode: number, errorDesc: string) => ReactElement<any>; // view to show if there's an error

  /**
   * Function that returns a loading indicator.
   */
  renderLoading?: () => ReactElement<any>;

  /**
   * Function that is invoked when the `WebView` has finished loading.
   */
  onLoad?: (event: WebViewNavigationEvent) => any;

  /**
   * Function that is invoked when the `WebView` load succeeds or fails.
   */
  onLoadEnd?: (event: WebViewNavigationEvent | WebViewErrorEvent) => any;

  /**
   * Function that is invoked when the `WebView` starts loading.
   */
  onLoadStart?: (event: WebViewNavigationEvent) => any;

  /**
   * Function that is invoked when the `WebView` load fails.
   */
  onError?: (event: WebViewErrorEvent) => any;

  /**
   * Controls whether to adjust the content inset for web views that are
   * placed behind a navigation bar, tab bar, or toolbar. The default value
   * is `true`.
   */
  automaticallyAdjustContentInsets?: boolean;

  /**
   * Function that is invoked when the `WebView` loading starts or ends.
   */
  onNavigationStateChange?: (event: WebViewNavigation) => any;

  /**
   * A function that is invoked when the webview calls `window.postMessage`.
   * Setting this property will inject a `postMessage` global into your
   * webview, but will still call pre-existing values of `postMessage`.
   *
   * `window.postMessage` accepts one argument, `data`, which will be
   * available on the event object, `event.nativeEvent.data`. `data`
   * must be a string.
   */
  onMessage?: (event: WebViewMessageEvent) => any;

  /**
   * Function that is invoked when the `WebView` is loading.
   */
  onLoadProgress?: (event: NativeSyntheticEvent<WebViewProgressEvent>) => any;

  /**
   * Boolean value that forces the `WebView` to show the loading view
   * on the first load.
   */
  startInLoadingState?: boolean;

  /**
   * Set this to provide JavaScript that will be injected into the web page
   * when the view loads.
   */
  injectedJavaScript?: string;

  /**
   * Boolean that controls whether the web content is scaled to fit
   * the view and enables the user to change the scale. The default value
   * is `true`.
   *
   * On iOS, when `useWebKit=true`, this prop will not work.
   */
  scalesPageToFit?: boolean;

  /**
   * Boolean that determines whether HTML5 audio and video requires the user
   * to tap them before they start playing. The default value is `true`.
   */
  mediaPlaybackRequiresUserAction?: boolean;

  /**
   * List of origin strings to allow being navigated to. The strings allow
   * wildcards and get matched against *just* the origin (not the full URL).
   * If the user taps to navigate to a new page but the new page is not in
   * this whitelist, we will open the URL in Safari.
   * The default whitelisted origins are "http://*" and "https://*".
   */
  originWhitelist?: string[];

  /**
   * Boolean value that determines whether caching is enabled in the
   * `WebView`. The default value is `true` - i.e. caching is *enabled by default*
   */
  cacheEnabled?: boolean,

  /**
   * Override the native component used to render the WebView. Enables a custom native
   * WebView which uses the same JavaScript as the original WebView.
   */
  nativeConfig?: WebViewNativeConfig;

  /**
   * A Boolean value that controls whether the horizontal scroll indicator is visible
   * The default value is `true`.
   */
  showsHorizontalScrollIndicator?: boolean;

  /**
   * A Boolean value that controls whether the vertical scroll indicator is visible
   * The default value is `true`
   */
  showsVerticalScrollIndicator?: boolean;

  style?: StyleProp<ViewStyle>;
  children?: ReactNode;
}

export class WebView extends Component<WebViewSharedProps> {
  static isFileUploadSupported: () => Promise<boolean>;
  public goForward: () => void;
  public goBack: () => void;
  public reload: () => void;
  public stopLoading: () => void;
  public postMessage: (msg: string) => void;
  public injectJavaScript: (js: string) => void;
}