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type * as ts from 'typescript';\nimport type * as swcWasm from '@swc/wasm';\nimport type * as swcTypes from '@swc/core';\nimport type { CreateTranspilerOptions, Transpiler } from './types';\nimport type { NodeModuleEmitKind } from '..';\n\ntype SwcInstance = typeof swcWasm;\nexport interface SwcTranspilerOptions extends CreateTranspilerOptions {\n  /**\n   * swc compiler to use for compilation\n   * Set to '@swc/wasm' to use swc's WASM compiler\n   * Default: '@swc/core', falling back to '@swc/wasm'\n   */\n  swc?: string | typeof swcWasm;\n}\n\nexport function create(createOptions: SwcTranspilerOptions): Transpiler {\n  const {\n    swc,\n    service: { config, projectLocalResolveHelper },\n    transpilerConfigLocalResolveHelper,\n    nodeModuleEmitKind,\n  } = createOptions;\n\n  // Load swc compiler\n  let swcInstance: SwcInstance;\n  // Used later in diagnostics; merely needs to be human-readable.\n  let swcDepName: string = 'swc';\n  if (typeof swc === 'string') {\n    swcDepName = swc;\n    swcInstance = require(transpilerConfigLocalResolveHelper(\n      swc,\n      true\n    )) as typeof swcWasm;\n  } else if (swc == null) {\n    let swcResolved;\n    try {\n      swcDepName = '@swc/core';\n      swcResolved = transpilerConfigLocalResolveHelper(swcDepName, true);\n    } catch (e) {\n      try {\n        swcDepName = '@swc/wasm';\n        swcResolved = transpilerConfigLocalResolveHelper(swcDepName, true);\n      } catch (e) {\n        throw new Error(\n          'swc compiler requires either @swc/core or @swc/wasm to be installed as a dependency.  See https://typestrong.org/ts-node/docs/transpilers'\n        );\n      }\n    }\n    swcInstance = require(swcResolved) as typeof swcWasm;\n  } else {\n    swcInstance = swc;\n  }\n\n  // Prepare SWC options derived from typescript compiler options\n  const { nonTsxOptions, tsxOptions } = createSwcOptions(\n    config.options,\n    nodeModuleEmitKind,\n    swcInstance,\n    swcDepName\n  );\n\n  const transpile: Transpiler['transpile'] = (input, transpileOptions) => {\n    const { fileName } = transpileOptions;\n    const swcOptions =\n      fileName.endsWith('.tsx') || fileName.endsWith('.jsx')\n        ? tsxOptions\n        : nonTsxOptions;\n    const { code, map } = swcInstance.transformSync(input, {\n      ...swcOptions,\n      filename: fileName,\n    });\n    return { outputText: code, sourceMapText: map };\n  };\n\n  return {\n    transpile,\n  };\n}\n\n/** @internal */\nexport const targetMapping = new Map<ts.ScriptTarget, SwcTarget>();\ntargetMapping.set(/* ts.ScriptTarget.ES3 */ 0, 'es3');\ntargetMapping.set(/* ts.ScriptTarget.ES5 */ 1, 'es5');\ntargetMapping.set(/* ts.ScriptTarget.ES2015 */ 2, 'es2015');\ntargetMapping.set(/* ts.ScriptTarget.ES2016 */ 3, 'es2016');\ntargetMapping.set(/* ts.ScriptTarget.ES2017 */ 4, 'es2017');\ntargetMapping.set(/* ts.ScriptTarget.ES2018 */ 5, 'es2018');\ntargetMapping.set(/* ts.ScriptTarget.ES2019 */ 6, 'es2019');\ntargetMapping.set(/* ts.ScriptTarget.ES2020 */ 7, 'es2020');\ntargetMapping.set(/* ts.ScriptTarget.ES2021 */ 8, 'es2021');\ntargetMapping.set(/* ts.ScriptTarget.ES2022 */ 9, 'es2022');\ntargetMapping.set(/* ts.ScriptTarget.ESNext */ 99, 'es2022');\n\ntype SwcTarget = typeof swcTargets[number];\n/**\n * @internal\n * We use this list to downgrade to a prior target when we probe swc to detect if it supports a particular target\n */\nconst swcTargets = [\n  'es3',\n  'es5',\n  'es2015',\n  'es2016',\n  'es2017',\n  'es2018',\n  'es2019',\n  'es2020',\n  'es2021',\n  'es2022',\n] as const;\n\nconst ModuleKind = {\n  None: 0,\n  CommonJS: 1,\n  AMD: 2,\n  UMD: 3,\n  System: 4,\n  ES2015: 5,\n  ES2020: 6,\n  ESNext: 99,\n  Node16: 100,\n  NodeNext: 199,\n} as const;\n\nconst JsxEmit = {\n  ReactJSX: /* ts.JsxEmit.ReactJSX */ 4,\n  ReactJSXDev: /* ts.JsxEmit.ReactJSXDev */ 5,\n} as const;\n\n/**\n * Prepare SWC options derived from typescript compiler options.\n * @internal exported for testing\n */\nexport function createSwcOptions(\n  compilerOptions: ts.CompilerOptions,\n  nodeModuleEmitKind: NodeModuleEmitKind | undefined,\n  swcInstance: SwcInstance,\n  swcDepName: string\n) {\n  const {\n    esModuleInterop,\n    sourceMap,\n    importHelpers,\n    experimentalDecorators,\n    emitDecoratorMetadata,\n    target,\n    module,\n    jsx,\n    jsxFactory,\n    jsxFragmentFactory,\n    strict,\n    alwaysStrict,\n    noImplicitUseStrict,\n  } = compilerOptions;\n\n  let swcTarget = targetMapping.get(target!) ?? 'es3';\n  // Downgrade to lower target if swc does not support the selected target.\n  // Perhaps project has an older version of swc.\n  // TODO cache the results of this; slightly faster\n  let swcTargetIndex = swcTargets.indexOf(swcTarget);\n  for (; swcTargetIndex >= 0; swcTargetIndex--) {\n    try {\n      swcInstance.transformSync('', {\n        jsc: { target: swcTargets[swcTargetIndex] },\n      });\n      break;\n    } catch (e) {}\n  }\n  swcTarget = swcTargets[swcTargetIndex];\n  const keepClassNames = target! >= /* ts.ScriptTarget.ES2016 */ 3;\n  const isNodeModuleKind =\n    module === ModuleKind.Node16 || module === ModuleKind.NodeNext;\n  // swc only supports these 4x module options [MUST_UPDATE_FOR_NEW_MODULEKIND]\n  const moduleType =\n    module === ModuleKind.CommonJS\n      ? 'commonjs'\n      : module === ModuleKind.AMD\n      ? 'amd'\n      : module === ModuleKind.UMD\n      ? 'umd'\n      : isNodeModuleKind && nodeModuleEmitKind === 'nodecjs'\n      ? 'commonjs'\n      : isNodeModuleKind && nodeModuleEmitKind === 'nodeesm'\n      ? 'es6'\n      : 'es6';\n  // In swc:\n  //   strictMode means `\"use strict\"` is *always* emitted for non-ES module, *never* for ES module where it is assumed it can be omitted.\n  //   (this assumption is invalid, but that's the way swc behaves)\n  // tsc is a bit more complex:\n  //   alwaysStrict will force emitting it always unless `import`/`export` syntax is emitted which implies it per the JS spec.\n  //   if not alwaysStrict, will emit implicitly whenever module target is non-ES *and* transformed module syntax is emitted.\n  // For node, best option is to assume that all scripts are modules (commonjs or esm) and thus should get tsc's implicit strict behavior.\n\n  // Always set strictMode, *unless* alwaysStrict is disabled and noImplicitUseStrict is enabled\n  const strictMode =\n    // if `alwaysStrict` is disabled, remembering that `strict` defaults `alwaysStrict` to true\n    (alwaysStrict === false || (alwaysStrict !== true && strict !== true)) &&\n    // if noImplicitUseStrict is enabled\n    noImplicitUseStrict === true\n      ? false\n      : true;\n\n  const jsxRuntime: swcTypes.ReactConfig['runtime'] =\n    jsx === JsxEmit.ReactJSX || jsx === JsxEmit.ReactJSXDev\n      ? 'automatic'\n      : undefined;\n  const jsxDevelopment: swcTypes.ReactConfig['development'] =\n    jsx === JsxEmit.ReactJSXDev ? true : undefined;\n\n  const nonTsxOptions = createVariant(false);\n  const tsxOptions = createVariant(true);\n  return { nonTsxOptions, tsxOptions };\n\n  function createVariant(isTsx: boolean): swcTypes.Options {\n    const swcOptions: swcTypes.Options = {\n      sourceMaps: sourceMap,\n      // isModule: true,\n      module: moduleType\n        ? ({\n            noInterop: !esModuleInterop,\n            type: moduleType,\n            strictMode,\n            // For NodeNext and Node12, emit as CJS but do not transform dynamic imports\n            ignoreDynamic: nodeModuleEmitKind === 'nodecjs',\n          } as swcTypes.ModuleConfig)\n        : undefined,\n      swcrc: false,\n      jsc: {\n        externalHelpers: importHelpers,\n        parser: {\n          syntax: 'typescript',\n          tsx: isTsx,\n          decorators: experimentalDecorators,\n          dynamicImport: true,\n          importAssertions: true,\n        },\n        target: swcTarget,\n        transform: {\n          decoratorMetadata: emitDecoratorMetadata,\n          legacyDecorator: true,\n          react: {\n            throwIfNamespace: false,\n            development: jsxDevelopment,\n            useBuiltins: false,\n            pragma: jsxFactory!,\n            pragmaFrag: jsxFragmentFactory!,\n            runtime: jsxRuntime,\n          } as swcTypes.ReactConfig,\n        },\n        keepClassNames,\n        experimental: {\n          keepImportAssertions: true,\n        },\n      } as swcTypes.JscConfig,\n    };\n\n    // Throw a helpful error if swc version is old, for example, if it rejects `ignoreDynamic`\n    try {\n      swcInstance.transformSync('', swcOptions);\n    } catch (e) {\n      throw new Error(\n        `${swcDepName} threw an error when attempting to validate swc compiler options.\\n` +\n          'You may be using an old version of swc which does not support the options used by ts-node.\\n' +\n          'Try upgrading to the latest version of swc.\\n' +\n          'Error message from swc:\\n' +\n          (e as Error)?.message\n      );\n    }\n\n    return swcOptions;\n  }\n}\n"]}