/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import * as t from '@babel/types';
import {codeFrameColumns} from '@babel/code-frame';
import {type SourceLocation} from './HIR';
import {Err, Ok, Result} from './Utils/Result';
import {assertExhaustive} from './Utils/utils';
import invariant from 'invariant';

// Number of context lines to display above the source of an error
const CODEFRAME_LINES_ABOVE = 2;
// Number of context lines to display below the source of an error
const CODEFRAME_LINES_BELOW = 3;
/*
 * Max number of lines for the _source_ of an error, before we abbreviate
 * the display of the source portion
 */
const CODEFRAME_MAX_LINES = 10;
/*
 * When the error source exceeds the above threshold, how many lines of
 * the source should be displayed? We show:
 * - CODEFRAME_LINES_ABOVE context lines
 * - CODEFRAME_ABBREVIATED_SOURCE_LINES of the error
 * - '...' ellipsis
 * - CODEFRAME_ABBREVIATED_SOURCE_LINES of the error
 * - CODEFRAME_LINES_BELOW context lines
 *
 * This value must be at least 2 or else we'll cut off important parts of the error message
 */
const CODEFRAME_ABBREVIATED_SOURCE_LINES = 5;

export enum ErrorSeverity {
  /**
   * An actionable error that the developer can fix. For example, product code errors should be
   * reported as such.
   */
  Error = 'Error',
  /**
   * An error that the developer may not necessarily be able to fix. For example, syntax not
   * supported by the compiler does not indicate any fault in the product code.
   */
  Warning = 'Warning',
  /**
   * Not an error. These will not be surfaced in ESLint, but may be surfaced in other ways
   * (eg Forgive) where informational hints can be shown.
   */
  Hint = 'Hint',
  /**
   * These errors will not be reported anywhere. Useful for work in progress validations.
   */
  Off = 'Off',
}

export type CompilerDiagnosticOptions = {
  category: ErrorCategory;
  reason: string;
  description: string | null;
  details: Array<CompilerDiagnosticDetail>;
  suggestions?: Array<CompilerSuggestion> | null | undefined;
};

export type CompilerDiagnosticDetail =
  /**
   * A/the source of the error
   */
  | {
      kind: 'error';
      loc: SourceLocation | null;
      message: string | null;
    }
  | {
      kind: 'hint';
      message: string;
    };

export enum CompilerSuggestionOperation {
  InsertBefore,
  InsertAfter,
  Remove,
  Replace,
}
export type CompilerSuggestion =
  | {
      op:
        | CompilerSuggestionOperation.InsertAfter
        | CompilerSuggestionOperation.InsertBefore
        | CompilerSuggestionOperation.Replace;
      range: [number, number];
      description: string;
      text: string;
    }
  | {
      op: CompilerSuggestionOperation.Remove;
      range: [number, number];
      description: string;
    };

/**
 * @deprecated use {@link CompilerDiagnosticOptions} instead
 */
export type CompilerErrorDetailOptions = {
  category: ErrorCategory;
  reason: string;
  description?: string | null | undefined;
  loc: SourceLocation | null;
  suggestions?: Array<CompilerSuggestion> | null | undefined;
};

export type PrintErrorMessageOptions = {
  /**
   * ESLint uses 1-indexed columns and prints one error at a time
   * So it doesn't require the "Found # error(s)" text
   */
  eslint: boolean;
};

export class CompilerDiagnostic {
  options: CompilerDiagnosticOptions;

  constructor(options: CompilerDiagnosticOptions) {
    this.options = options;
  }

  static create(
    options: Omit<CompilerDiagnosticOptions, 'details'>,
  ): CompilerDiagnostic {
    return new CompilerDiagnostic({...options, details: []});
  }

  clone(): CompilerDiagnostic {
    const cloned = CompilerDiagnostic.create({...this.options});
    cloned.options.details = [...this.options.details];
    return cloned;
  }

  get reason(): CompilerDiagnosticOptions['reason'] {
    return this.options.reason;
  }
  get description(): CompilerDiagnosticOptions['description'] {
    return this.options.description;
  }
  get severity(): ErrorSeverity {
    return getRuleForCategory(this.category).severity;
  }
  get suggestions(): CompilerDiagnosticOptions['suggestions'] {
    return this.options.suggestions;
  }
  get category(): ErrorCategory {
    return this.options.category;
  }

  withDetails(...details: Array<CompilerDiagnosticDetail>): CompilerDiagnostic {
    this.options.details.push(...details);
    return this;
  }

  primaryLocation(): SourceLocation | null {
    const firstErrorDetail = this.options.details.filter(
      d => d.kind === 'error',
    )[0];
    return firstErrorDetail != null && firstErrorDetail.kind === 'error'
      ? firstErrorDetail.loc
      : null;
  }

  printErrorMessage(source: string, options: PrintErrorMessageOptions): string {
    const buffer = [printErrorSummary(this.category, this.reason)];
    if (this.description != null) {
      buffer.push('\n\n', `${this.description}.`);
    }
    for (const detail of this.options.details) {
      switch (detail.kind) {
        case 'error': {
          const loc = detail.loc;
          if (loc == null || typeof loc === 'symbol') {
            continue;
          }
          let codeFrame: string;
          try {
            codeFrame = printCodeFrame(source, loc, detail.message ?? '');
          } catch (e) {
            codeFrame = detail.message ?? '';
          }
          buffer.push('\n\n');
          if (loc.filename != null) {
            const line = loc.start.line;
            const column = options.eslint
              ? loc.start.column + 1
              : loc.start.column;
            buffer.push(`${loc.filename}:${line}:${column}\n`);
          }
          buffer.push(codeFrame);
          break;
        }
        case 'hint': {
          buffer.push('\n\n');
          buffer.push(detail.message);
          break;
        }
        default: {
          assertExhaustive(
            detail,
            `Unexpected detail kind ${(detail as any).kind}`,
          );
        }
      }
    }
    return buffer.join('');
  }

  toString(): string {
    const buffer = [printErrorSummary(this.category, this.reason)];
    if (this.description != null) {
      buffer.push(`. ${this.description}.`);
    }
    const loc = this.primaryLocation();
    if (loc != null && typeof loc !== 'symbol') {
      buffer.push(` (${loc.start.line}:${loc.start.column})`);
    }
    return buffer.join('');
  }
}

/**
 * Each bailout or invariant in HIR lowering creates an {@link CompilerErrorDetail}, which is then
 * aggregated into a single {@link CompilerError} later.
 *
 * @deprecated use {@link CompilerDiagnostic} instead
 */
export class CompilerErrorDetail {
  options: CompilerErrorDetailOptions;

  constructor(options: CompilerErrorDetailOptions) {
    this.options = options;
  }

  get reason(): CompilerErrorDetailOptions['reason'] {
    return this.options.reason;
  }
  get description(): CompilerErrorDetailOptions['description'] {
    return this.options.description;
  }
  get severity(): ErrorSeverity {
    return getRuleForCategory(this.category).severity;
  }
  get loc(): CompilerErrorDetailOptions['loc'] {
    return this.options.loc;
  }
  get suggestions(): CompilerErrorDetailOptions['suggestions'] {
    return this.options.suggestions;
  }
  get category(): ErrorCategory {
    return this.options.category;
  }

  primaryLocation(): SourceLocation | null {
    return this.loc;
  }

  printErrorMessage(source: string, options: PrintErrorMessageOptions): string {
    const buffer = [printErrorSummary(this.category, this.reason)];
    if (this.description != null) {
      buffer.push(`\n\n${this.description}.`);
    }
    const loc = this.loc;
    if (loc != null && typeof loc !== 'symbol') {
      let codeFrame: string;
      try {
        codeFrame = printCodeFrame(source, loc, this.reason);
      } catch (e) {
        codeFrame = '';
      }
      buffer.push(`\n\n`);
      if (loc.filename != null) {
        const line = loc.start.line;
        const column = options.eslint ? loc.start.column + 1 : loc.start.column;
        buffer.push(`${loc.filename}:${line}:${column}\n`);
      }
      buffer.push(codeFrame);
      buffer.push('\n\n');
    }
    return buffer.join('');
  }

  toString(): string {
    const buffer = [printErrorSummary(this.category, this.reason)];
    if (this.description != null) {
      buffer.push(`. ${this.description}.`);
    }
    const loc = this.loc;
    if (loc != null && typeof loc !== 'symbol') {
      buffer.push(` (${loc.start.line}:${loc.start.column})`);
    }
    return buffer.join('');
  }
}

/**
 * An aggregate of {@link CompilerDiagnostic}. This allows us to aggregate all issues found by the
 * compiler into a single error before we throw. Where possible, prefer to push diagnostics into
 * the error aggregate instead of throwing immediately.
 */
export class CompilerError extends Error {
  details: Array<CompilerErrorDetail | CompilerDiagnostic> = [];
  disabledDetails: Array<CompilerErrorDetail | CompilerDiagnostic> = [];
  printedMessage: string | null = null;

  static simpleInvariant(
    condition: unknown,
    options: {
      reason: CompilerDiagnosticOptions['reason'];
      description?: CompilerDiagnosticOptions['description'];
      loc: SourceLocation;
    },
  ): asserts condition {
    if (!condition) {
      const errors = new CompilerError();
      errors.pushDiagnostic(
        CompilerDiagnostic.create({
          reason: options.reason,
          description: options.description ?? null,
          category: ErrorCategory.Invariant,
        }).withDetails({
          kind: 'error',
          loc: options.loc,
          message: options.reason,
        }),
      );
      throw errors;
    }
  }
  static invariant(
    condition: unknown,
    options: Omit<CompilerDiagnosticOptions, 'category'>,
  ): asserts condition {
    if (!condition) {
      const errors = new CompilerError();
      errors.pushDiagnostic(
        CompilerDiagnostic.create({
          reason: options.reason,
          description: options.description,
          category: ErrorCategory.Invariant,
        }).withDetails(...options.details),
      );
      throw errors;
    }
  }

  static throwDiagnostic(options: CompilerDiagnosticOptions): never {
    const errors = new CompilerError();
    errors.pushDiagnostic(new CompilerDiagnostic(options));
    throw errors;
  }

  static throwTodo(
    options: Omit<CompilerErrorDetailOptions, 'category'>,
  ): never {
    const errors = new CompilerError();
    errors.pushErrorDetail(
      new CompilerErrorDetail({
        ...options,
        category: ErrorCategory.Todo,
      }),
    );
    throw errors;
  }

  static throwInvalidJS(
    options: Omit<CompilerErrorDetailOptions, 'category'>,
  ): never {
    const errors = new CompilerError();
    errors.pushErrorDetail(
      new CompilerErrorDetail({
        ...options,
        category: ErrorCategory.Syntax,
      }),
    );
    throw errors;
  }

  static throwInvalidReact(options: CompilerErrorDetailOptions): never {
    const errors = new CompilerError();
    errors.pushErrorDetail(new CompilerErrorDetail(options));
    throw errors;
  }

  static throwInvalidConfig(
    options: Omit<CompilerErrorDetailOptions, 'category'>,
  ): never {
    const errors = new CompilerError();
    errors.pushErrorDetail(
      new CompilerErrorDetail({
        ...options,
        category: ErrorCategory.Config,
      }),
    );
    throw errors;
  }

  static throw(options: CompilerErrorDetailOptions): never {
    const errors = new CompilerError();
    errors.pushErrorDetail(new CompilerErrorDetail(options));
    throw errors;
  }

  constructor(...args: Array<any>) {
    super(...args);
    this.name = 'ReactCompilerError';
    this.details = [];
    this.disabledDetails = [];
  }

  override get message(): string {
    return this.printedMessage ?? this.toString();
  }

  override set message(_message: string) {}

  override toString(): string {
    if (this.printedMessage) {
      return this.printedMessage;
    }
    if (Array.isArray(this.details)) {
      return this.details.map(detail => detail.toString()).join('\n\n');
    }
    return this.name;
  }

  withPrintedMessage(
    source: string,
    options: PrintErrorMessageOptions,
  ): CompilerError {
    this.printedMessage = this.printErrorMessage(source, options);
    return this;
  }

  printErrorMessage(source: string, options: PrintErrorMessageOptions): string {
    if (options.eslint && this.details.length === 1) {
      return this.details[0].printErrorMessage(source, options);
    }
    return (
      `Found ${this.details.length} error${this.details.length === 1 ? '' : 's'}:\n\n` +
      this.details
        .map(detail => detail.printErrorMessage(source, options).trim())
        .join('\n\n')
    );
  }

  merge(other: CompilerError): void {
    this.details.push(...other.details);
    this.disabledDetails.push(...other.disabledDetails);
  }

  pushDiagnostic(diagnostic: CompilerDiagnostic): void {
    if (diagnostic.severity === ErrorSeverity.Off) {
      this.disabledDetails.push(diagnostic);
    } else {
      this.details.push(diagnostic);
    }
  }

  /**
   * @deprecated use {@link pushDiagnostic} instead
   */
  push(options: CompilerErrorDetailOptions): CompilerErrorDetail {
    const detail = new CompilerErrorDetail({
      category: options.category,
      reason: options.reason,
      description: options.description ?? null,
      suggestions: options.suggestions,
      loc: typeof options.loc === 'symbol' ? null : options.loc,
    });
    return this.pushErrorDetail(detail);
  }

  /**
   * @deprecated use {@link pushDiagnostic} instead
   */
  pushErrorDetail(detail: CompilerErrorDetail): CompilerErrorDetail {
    if (detail.severity === ErrorSeverity.Off) {
      this.disabledDetails.push(detail);
    } else {
      this.details.push(detail);
    }
    return detail;
  }

  hasAnyErrors(): boolean {
    return this.details.length > 0;
  }

  asResult(): Result<void, CompilerError> {
    return this.hasAnyErrors() ? Err(this) : Ok(undefined);
  }

  /**
   * Returns true if any of the error details are of severity Error.
   */
  hasErrors(): boolean {
    for (const detail of this.details) {
      if (detail.severity === ErrorSeverity.Error) {
        return true;
      }
    }
    return false;
  }

  /**
   * Returns true if there are no Errors and there is at least one Warning.
   */
  hasWarning(): boolean {
    let res = false;
    for (const detail of this.details) {
      if (detail.severity === ErrorSeverity.Error) {
        return false;
      }
      if (detail.severity === ErrorSeverity.Warning) {
        res = true;
      }
    }
    return res;
  }

  hasHints(): boolean {
    let res = false;
    for (const detail of this.details) {
      if (detail.severity === ErrorSeverity.Error) {
        return false;
      }
      if (detail.severity === ErrorSeverity.Warning) {
        return false;
      }
      if (detail.severity === ErrorSeverity.Hint) {
        res = true;
      }
    }
    return res;
  }
}

function printCodeFrame(
  source: string,
  loc: t.SourceLocation,
  message: string,
): string {
  const printed = codeFrameColumns(
    source,
    {
      start: {
        line: loc.start.line,
        column: loc.start.column + 1,
      },
      end: {
        line: loc.end.line,
        column: loc.end.column + 1,
      },
    },
    {
      message,
      linesAbove: CODEFRAME_LINES_ABOVE,
      linesBelow: CODEFRAME_LINES_BELOW,
    },
  );
  const lines = printed.split(/\r?\n/);
  if (loc.end.line - loc.start.line < CODEFRAME_MAX_LINES) {
    return printed;
  }
  const pipeIndex = lines[0].indexOf('|');
  return [
    ...lines.slice(
      0,
      CODEFRAME_LINES_ABOVE + CODEFRAME_ABBREVIATED_SOURCE_LINES,
    ),
    ' '.repeat(pipeIndex) + '…',
    ...lines.slice(
      -(CODEFRAME_LINES_BELOW + CODEFRAME_ABBREVIATED_SOURCE_LINES),
    ),
  ].join('\n');
}

function printErrorSummary(category: ErrorCategory, message: string): string {
  let heading: string;
  switch (category) {
    case ErrorCategory.AutomaticEffectDependencies:
    case ErrorCategory.CapitalizedCalls:
    case ErrorCategory.Config:
    case ErrorCategory.EffectDerivationsOfState:
    case ErrorCategory.EffectSetState:
    case ErrorCategory.ErrorBoundaries:
    case ErrorCategory.Factories:
    case ErrorCategory.FBT:
    case ErrorCategory.Fire:
    case ErrorCategory.Gating:
    case ErrorCategory.Globals:
    case ErrorCategory.Hooks:
    case ErrorCategory.Immutability:
    case ErrorCategory.Purity:
    case ErrorCategory.Refs:
    case ErrorCategory.RenderSetState:
    case ErrorCategory.StaticComponents:
    case ErrorCategory.Suppression:
    case ErrorCategory.Syntax:
    case ErrorCategory.UseMemo:
    case ErrorCategory.VoidUseMemo:
    case ErrorCategory.MemoDependencies:
    case ErrorCategory.EffectExhaustiveDependencies: {
      heading = 'Error';
      break;
    }
    case ErrorCategory.EffectDependencies:
    case ErrorCategory.IncompatibleLibrary:
    case ErrorCategory.PreserveManualMemo:
    case ErrorCategory.UnsupportedSyntax: {
      heading = 'Compilation Skipped';
      break;
    }
    case ErrorCategory.Invariant: {
      heading = 'Invariant';
      break;
    }
    case ErrorCategory.Todo: {
      heading = 'Todo';
      break;
    }
    default: {
      assertExhaustive(category, `Unhandled category '${category}'`);
    }
  }
  return `${heading}: ${message}`;
}

/**
 * See getRuleForCategory() for how these map to ESLint rules
 */
export enum ErrorCategory {
  /**
   * Checking for valid hooks usage (non conditional, non-first class, non reactive, etc)
   */
  Hooks = 'Hooks',
  /**
   * Checking for no capitalized calls (not definitively an error, hence separating)
   */
  CapitalizedCalls = 'CapitalizedCalls',
  /**
   * Checking for static components
   */
  StaticComponents = 'StaticComponents',
  /**
   * Checking for valid usage of manual memoization
   */
  UseMemo = 'UseMemo',
  /**
   * Checking that useMemos always return a value
   */
  VoidUseMemo = 'VoidUseMemo',
  /**
   * Checking for higher order functions acting as factories for components/hooks
   */
  Factories = 'Factories',
  /**
   * Checks that manual memoization is preserved
   */
  PreserveManualMemo = 'PreserveManualMemo',
  /**
   * Checks for exhaustive useMemo/useCallback dependencies without extraneous values
   */
  MemoDependencies = 'MemoDependencies',
  /**
   * Checks for known incompatible libraries
   */
  IncompatibleLibrary = 'IncompatibleLibrary',
  /**
   * Checking for no mutations of props, hook arguments, hook return values
   */
  Immutability = 'Immutability',
  /**
   * Checking for assignments to globals
   */
  Globals = 'Globals',
  /**
   * Checking for valid usage of refs, ie no access during render
   */
  Refs = 'Refs',
  /**
   * Checks for memoized effect deps
   */
  EffectDependencies = 'EffectDependencies',
  /**
   * Checks for exhaustive and extraneous effect dependencies
   */
  EffectExhaustiveDependencies = 'EffectExhaustiveDependencies',
  /**
   * Checks for no setState in effect bodies
   */
  EffectSetState = 'EffectSetState',
  EffectDerivationsOfState = 'EffectDerivationsOfState',
  /**
   * Validates against try/catch in place of error boundaries
   */
  ErrorBoundaries = 'ErrorBoundaries',
  /**
   * Checking for pure functions
   */
  Purity = 'Purity',
  /**
   * Validates against setState in render
   */
  RenderSetState = 'RenderSetState',
  /**
   * Internal invariants
   */
  Invariant = 'Invariant',
  /**
   * Todos
   */
  Todo = 'Todo',
  /**
   * Syntax errors
   */
  Syntax = 'Syntax',
  /**
   * Checks for use of unsupported syntax
   */
  UnsupportedSyntax = 'UnsupportedSyntax',
  /**
   * Config errors
   */
  Config = 'Config',
  /**
   * Gating error
   */
  Gating = 'Gating',
  /**
   * Suppressions
   */
  Suppression = 'Suppression',
  /**
   * Issues with auto deps
   */
  AutomaticEffectDependencies = 'AutomaticEffectDependencies',
  /**
   * Issues with `fire`
   */
  Fire = 'Fire',
  /**
   * fbt-specific issues
   */
  FBT = 'FBT',
}

export enum LintRulePreset {
  /**
   * Rules that are stable and included in the `recommended` preset.
   */
  Recommended = 'recommended',
  /**
   * Rules that are more experimental and only included in the `recommended-latest` preset.
   */
  RecommendedLatest = 'recommended-latest',
  /**
   * Rules that are disabled.
   */
  Off = 'off',
}

export type LintRule = {
  // Stores the category the rule corresponds to, used to filter errors when reporting
  category: ErrorCategory;

  // Stores the severity of the error, which is used to map to lint levels such as error/warning.
  severity: ErrorSeverity;

  /**
   * The "name" of the rule as it will be used by developers to enable/disable, eg
   * "eslint-disable-nest line <name>"
   */
  name: string;

  /**
   * A description of the rule that appears somewhere in ESLint. This does not affect
   * how error messages are formatted
   */
  description: string;

  /**
   * Configures the preset in which the rule is enabled. If 'off', the rule will not be included in
   * any preset.
   *
   * NOTE: not all validations are enabled by default! Setting this flag only affects
   * whether a given rule is part of the recommended set. The corresponding validation
   * also should be enabled by default if you want the error to actually show up!
   */
  preset: LintRulePreset;
};

const RULE_NAME_PATTERN = /^[a-z]+(-[a-z]+)*$/;

export function getRuleForCategory(category: ErrorCategory): LintRule {
  const rule = getRuleForCategoryImpl(category);
  invariant(
    RULE_NAME_PATTERN.test(rule.name),
    `Invalid rule name, got '${rule.name}' but rules must match ${RULE_NAME_PATTERN.toString()}`,
  );
  return rule;
}

function getRuleForCategoryImpl(category: ErrorCategory): LintRule {
  switch (category) {
    case ErrorCategory.AutomaticEffectDependencies: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'automatic-effect-dependencies',
        description:
          'Verifies that automatic effect dependencies are compiled if opted-in',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.CapitalizedCalls: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'capitalized-calls',
        description:
          'Validates against calling capitalized functions/methods instead of using JSX',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Config: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'config',
        description: 'Validates the compiler configuration options',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.EffectDependencies: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'memoized-effect-dependencies',
        description: 'Validates that effect dependencies are memoized',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.EffectExhaustiveDependencies: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'exhaustive-effect-dependencies',
        description:
          'Validates that effect dependencies are exhaustive and without extraneous values',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.EffectDerivationsOfState: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'no-deriving-state-in-effects',
        description:
          'Validates against deriving values from state in an effect',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.EffectSetState: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'set-state-in-effect',
        description:
          'Validates against calling setState synchronously in an effect. ' +
          'This can indicate non-local derived data, a derived event pattern, or ' +
          'improper external data synchronization.',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.ErrorBoundaries: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'error-boundaries',
        description:
          'Validates usage of error boundaries instead of try/catch for errors in child components',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Factories: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'component-hook-factories',
        description:
          'Validates against higher order functions defining nested components or hooks. ' +
          'Components and hooks should be defined at the module level',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.FBT: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'fbt',
        description: 'Validates usage of fbt',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Fire: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'fire',
        description: 'Validates usage of `fire`',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Gating: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'gating',
        description:
          'Validates configuration of [gating mode](https://react.dev/reference/react-compiler/gating)',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Globals: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'globals',
        description:
          'Validates against assignment/mutation of globals during render, part of ensuring that ' +
          '[side effects must render outside of render](https://react.dev/reference/rules/components-and-hooks-must-be-pure#side-effects-must-run-outside-of-render)',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Hooks: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'hooks',
        description: 'Validates the rules of hooks',
        /**
         * TODO: the "Hooks" rule largely reimplements the "rules-of-hooks" non-compiler rule.
         * We need to dedeupe these (moving the remaining bits into the compiler) and then enable
         * this rule.
         */
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Immutability: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'immutability',
        description:
          'Validates against mutating props, state, and other values that [are immutable](https://react.dev/reference/rules/components-and-hooks-must-be-pure#props-and-state-are-immutable)',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Invariant: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'invariant',
        description: 'Internal invariants',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.PreserveManualMemo: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'preserve-manual-memoization',
        description:
          'Validates that existing manual memoized is preserved by the compiler. ' +
          'React Compiler will only compile components and hooks if its inference ' +
          '[matches or exceeds the existing manual memoization](https://react.dev/learn/react-compiler/introduction#what-should-i-do-about-usememo-usecallback-and-reactmemo)',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Purity: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'purity',
        description:
          'Validates that [components/hooks are pure](https://react.dev/reference/rules/components-and-hooks-must-be-pure) by checking that they do not call known-impure functions',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Refs: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'refs',
        description:
          'Validates correct usage of refs, not reading/writing during render. See the "pitfalls" section in [`useRef()` usage](https://react.dev/reference/react/useRef#usage)',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.RenderSetState: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'set-state-in-render',
        description:
          'Validates against setting state during render, which can trigger additional renders and potential infinite render loops',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.StaticComponents: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'static-components',
        description:
          'Validates that components are static, not recreated every render. Components that are recreated dynamically can reset state and trigger excessive re-rendering',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.Suppression: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'rule-suppression',
        description: 'Validates against suppression of other rules',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Syntax: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'syntax',
        description: 'Validates against invalid syntax',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.Todo: {
      return {
        category,
        severity: ErrorSeverity.Hint,
        name: 'todo',
        description: 'Unimplemented features',
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.UnsupportedSyntax: {
      return {
        category,
        severity: ErrorSeverity.Warning,
        name: 'unsupported-syntax',
        description:
          'Validates against syntax that we do not plan to support in React Compiler',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.UseMemo: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'use-memo',
        description:
          'Validates usage of the useMemo() hook against common mistakes. See [`useMemo()` docs](https://react.dev/reference/react/useMemo) for more information.',
        preset: LintRulePreset.Recommended,
      };
    }
    case ErrorCategory.VoidUseMemo: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'void-use-memo',
        description:
          'Validates that useMemos always return a value and that the result of the useMemo is used by the component/hook. See [`useMemo()` docs](https://react.dev/reference/react/useMemo) for more information.',
        preset: LintRulePreset.RecommendedLatest,
      };
    }
    case ErrorCategory.MemoDependencies: {
      return {
        category,
        severity: ErrorSeverity.Error,
        name: 'memo-dependencies',
        description:
          'Validates that useMemo() and useCallback() specify comprehensive dependencies without extraneous values. See [`useMemo()` docs](https://react.dev/reference/react/useMemo) for more information.',
        /**
         * TODO: the "MemoDependencies" rule largely reimplements the "exhaustive-deps" non-compiler rule,
         * allowing the compiler to ensure it does not regress change behavior due to different dependencies.
         * We previously relied on the source having ESLint suppressions for any exhaustive-deps violations,
         * but it's more reliable to verify it within the compiler.
         *
         * Long-term we should de-duplicate these implementations.
         */
        preset: LintRulePreset.Off,
      };
    }
    case ErrorCategory.IncompatibleLibrary: {
      return {
        category,
        severity: ErrorSeverity.Warning,
        name: 'incompatible-library',
        description:
          'Validates against usage of libraries which are incompatible with memoization (manual or automatic)',
        preset: LintRulePreset.Recommended,
      };
    }
    default: {
      assertExhaustive(category, `Unsupported category ${category}`);
    }
  }
}

export const LintRules: Array<LintRule> = Object.keys(ErrorCategory).map(
  category => getRuleForCategory(category as any),
);
