import {  createElement,  useEffect,  useImperativeHandle,  useRef,  type ComponentType,  type Ref,} from "react";import type { NativeSyntheticEvent, ViewProps } from "react-native";import { requireNativeView } from "expo"; import { NativeViewResolutionError } from "../../native/nativeViewResolutionError"; const NATIVE_REVIEW_DIFF_MODULE_NAME = "T3ReviewDiffSurface";const NATIVE_REVIEW_DIFF_PAYLOAD_RETRY_FRAMES = 60; interface ExpoGlobalWithViewConfig {  readonly expo?: {    getViewConfig?: (moduleName: string, viewName?: string) => unknown;  };} export interface NativeReviewDiffRow {  readonly kind: "file" | "hunk" | "line" | "notice" | "comment";  readonly id: string;  readonly fileId?: string;  readonly filePath?: string;  readonly previousPath?: string | null;  readonly changeType?:    | "modified"    | "new"    | "deleted"    | "renamed"    | "rename-pure"    | "rename-changed";  readonly additions?: number;  readonly deletions?: number;  readonly text?: string;  readonly content?: string;  readonly change?: "context" | "add" | "delete";  readonly oldLineNumber?: number | null;  readonly newLineNumber?: number | null;  readonly wordDiffRanges?: ReadonlyArray<NativeReviewDiffWordDiffRange>;  readonly commentText?: string;  readonly commentRangeLabel?: string;  readonly commentSectionTitle?: string;} export interface NativeReviewDiffWordDiffRange {  readonly start: number;  readonly end: number;} export interface NativeReviewDiffToken {  readonly content: string;  readonly color: string | null;  readonly fontStyle: number | null;} export interface NativeReviewDiffTheme {  readonly background: string;  readonly text: string;  readonly mutedText: string;  readonly headerBackground: string;  readonly border: string;  readonly hunkBackground: string;  readonly hunkText: string;  readonly addBackground: string;  readonly deleteBackground: string;  readonly addBar: string;  readonly deleteBar: string;  readonly addText: string;  readonly deleteText: string;} export interface NativeReviewDiffStyle {  readonly rowHeight?: number;  readonly contentWidth?: number;  readonly changeBarWidth?: number;  readonly gutterWidth?: number;  readonly codePadding?: number;  readonly textVerticalInset?: number;  readonly fileHeaderHeight?: number;  readonly fileHeaderHorizontalMargin?: number;  readonly fileHeaderVerticalMargin?: number;  readonly fileHeaderCornerRadius?: number;  readonly fileHeaderHorizontalPadding?: number;  readonly fileHeaderPathRightPadding?: number;  readonly fileHeaderCountColumnWidth?: number;  readonly fileHeaderCountGap?: number;  readonly codeFontSize?: number;  readonly codeFontWeight?: string;  readonly lineNumberFontSize?: number;  readonly lineNumberFontWeight?: string;  readonly hunkFontSize?: number;  readonly hunkFontWeight?: string;  readonly fileHeaderFontSize?: number;  readonly fileHeaderFontWeight?: string;  readonly fileHeaderMetaFontSize?: number;  readonly fileHeaderMetaFontWeight?: string;  readonly fileHeaderSubtextFontSize?: number;  readonly fileHeaderSubtextFontWeight?: string;  readonly fileHeaderStatusFontSize?: number;  readonly fileHeaderStatusFontWeight?: string;  readonly emptyStateFontSize?: number;  readonly emptyStateFontWeight?: string;} export interface NativeReviewDiffViewProps extends ViewProps {  readonly rowsJson: string;  readonly tokensJson?: string;  readonly tokensPatchJson?: string;  readonly tokensResetKey?: string;  readonly contentResetKey?: string;  readonly collapsedFileIdsJson?: string;  readonly viewedFileIdsJson?: string;  readonly selectedRowIdsJson?: string;  readonly collapsedCommentIdsJson?: string;  readonly appearanceScheme: "light" | "dark";  readonly themeJson: string;  readonly styleJson?: string;  readonly rowHeight: number;  readonly contentWidth: number;  readonly initialRowIndex?: number;  readonly refreshing?: boolean;  readonly nativeViewRef?: Ref<NativeReviewDiffViewHandle>;  readonly onPullToRefresh?: (event: NativeSyntheticEvent<Record<string, never>>) => void;  readonly onDebug?: (event: NativeSyntheticEvent<Record<string, unknown>>) => void;  readonly onVisibleFileChange?: (    event: NativeSyntheticEvent<{ readonly fileId?: string | null }>,  ) => void;  readonly onToggleFile?: (event: NativeSyntheticEvent<{ readonly fileId?: string }>) => void;  readonly onToggleViewedFile?: (event: NativeSyntheticEvent<{ readonly fileId?: string }>) => void;  readonly onPressLine?: (    event: NativeSyntheticEvent<{      readonly rowId?: string;      readonly fileId?: string;      readonly gesture?: "tap" | "longPress";      readonly oldLineNumber?: number;      readonly newLineNumber?: number;      readonly change?: "context" | "add" | "delete";    }>,  ) => void;  readonly onToggleComment?: (event: NativeSyntheticEvent<{ readonly commentId?: string }>) => void;} export interface NativeReviewDiffViewHandle {  readonly scrollToFile: (fileId: string, animated?: boolean) => Promise<void>;  readonly scrollToTop: (animated?: boolean) => Promise<void>;} export function isNativeReviewDiffDrawEvent(payload: Readonly<Record<string, unknown>>): boolean {  return payload.message === "draw-metrics" || payload.message === "visible-range";} interface NativeReviewDiffViewRef {  readonly setRowsJson: (rowsJson: string) => Promise<void>;  readonly setTokensJson: (tokensJson: string) => Promise<void>;  readonly setTokensPatchJson: (tokensPatchJson: string) => Promise<void>;  readonly scrollToFile: (fileId: string, animated: boolean) => Promise<void>;  readonly scrollToTop: (animated: boolean) => Promise<void>;} type NativeReviewDiffRawViewProps = Omit<  NativeReviewDiffViewProps,  "nativeViewRef" | "rowsJson" | "tokensJson" | "tokensPatchJson"> & {  readonly ref?: Ref<NativeReviewDiffViewRef>;}; let cachedNativeReviewDiffRawView: ComponentType<NativeReviewDiffRawViewProps> | undefined;let nativeReviewDiffViewResolutionFailed = false; type NativeReviewDiffPayloadMethod = "setRowsJson" | "setTokensJson" | "setTokensPatchJson"; export function isPendingNativeViewRegistration(error: unknown): boolean {  if (!(error instanceof Error)) return false;  return (    error.message.includes(`Unable to find the '${NATIVE_REVIEW_DIFF_MODULE_NAME}' view`) ||    (error.message.includes("Unable to find the class") &&      error.message.includes("T3ReviewDiffView view with tag"))  );} function useNativeReviewDiffPayload(  nativeRef: React.RefObject<NativeReviewDiffViewRef | null>,  method: NativeReviewDiffPayloadMethod,  payload: string | undefined,) {  useEffect(() => {    if (payload === undefined) {      return;    }     let cancelled = false;    let frame: number | null = null;    let attempts = 0;     const dispatch = () => {      if (cancelled) {        return;      }       const view = nativeRef.current;      const command = view?.[method];      if (!view || !command) {        if (attempts < NATIVE_REVIEW_DIFF_PAYLOAD_RETRY_FRAMES) {          attempts += 1;          frame = requestAnimationFrame(dispatch);        }        return;      }       void command.call(view, payload).catch((error: unknown) => {        if (          !cancelled &&          attempts < NATIVE_REVIEW_DIFF_PAYLOAD_RETRY_FRAMES &&          isPendingNativeViewRegistration(error)        ) {          attempts += 1;          frame = requestAnimationFrame(dispatch);          return;        }        console.error(`[native-review-diff] ${method} failed`, error);      });    };     // Fabric attaches the React ref before Expo registers the native tag used by    // view functions. Starting on the next frame avoids racing that registration.    frame = requestAnimationFrame(dispatch);     return () => {      cancelled = true;      if (frame !== null) {        cancelAnimationFrame(frame);      }    };  }, [method, nativeRef, payload]);} function getExpoViewConfig(moduleName: string) {  return (globalThis as typeof globalThis & ExpoGlobalWithViewConfig).expo?.getViewConfig?.(    moduleName,  );} function NativeReviewDiffView(props: NativeReviewDiffViewProps) {  const { nativeViewRef, rowsJson, tokensJson, tokensPatchJson, ...nativeProps } = props;  const nativeRef = useRef<NativeReviewDiffViewRef>(null);  useNativeReviewDiffPayload(nativeRef, "setRowsJson", rowsJson);  useNativeReviewDiffPayload(nativeRef, "setTokensJson", tokensJson);  useNativeReviewDiffPayload(nativeRef, "setTokensPatchJson", tokensPatchJson);  useImperativeHandle(    nativeViewRef,    () => ({      scrollToFile: async (fileId, animated = true) => {        await nativeRef.current?.scrollToFile(fileId, animated);      },      scrollToTop: async (animated = true) => {        await nativeRef.current?.scrollToTop(animated);      },    }),    [],  );   const RawNativeView = cachedNativeReviewDiffRawView;  if (!RawNativeView) {    return null;  }   return createElement(RawNativeView, { ...nativeProps, ref: nativeRef });} export function resolveNativeReviewDiffView(): ComponentType<NativeReviewDiffViewProps> | null {  if (cachedNativeReviewDiffRawView) {    return NativeReviewDiffView;  }   if (nativeReviewDiffViewResolutionFailed) {    return null;  }   if (getExpoViewConfig(NATIVE_REVIEW_DIFF_MODULE_NAME) == null) {    return null;  }   try {    cachedNativeReviewDiffRawView = requireNativeView<NativeReviewDiffRawViewProps>(      NATIVE_REVIEW_DIFF_MODULE_NAME,    );  } catch (cause) {    nativeReviewDiffViewResolutionFailed = true;    console.error(      new NativeViewResolutionError({        nativeModuleName: NATIVE_REVIEW_DIFF_MODULE_NAME,        cause,      }),    );    return null;  }   return cachedNativeReviewDiffRawView ? NativeReviewDiffView : null;}