index.ts

/* eslint-disable @typescript-eslint/no-unsafe-assignment */
import {Argument, Command as BaseCommand, InvalidArgumentError, InvalidOptionArgumentError} from 'commander'
import {Option as BaseOption} from 'commander'
import {JSONSchema7} from 'json-schema'
import {inspect} from 'util'
import {addCompletions} from './completions.js'
import {runWithCliContext} from './context.js'
import {FailedToExitError, CliValidationError} from './errors.js'
import {
  flattenedProperties,
  incompatiblePropertyPairs,
  getDescription,
  getSchemaTypes,
  getEnumChoices,
  getAllowedSchemas,
} from './json-schema.js'
import {commandToJSON} from './json.js'
import {lineByLineConsoleLogger} from './logging.js'
import {
  type AnyRouter,
  type CreateCallerFactoryLike,
  getParsedProcedure,
  isNorpcRouter,
  isTrpcRouter,
  parseRouter,
  type ProcedureInfo,
} from './parse-router.js'
import {promptify} from './prompts.js'
import {prettifyStandardSchemaError} from './standard-schema/errors.js'
import {looksLikeStandardSchemaFailure} from './standard-schema/utils.js'
import {TrpcCli, TrpcCliParams, TrpcCliRunParams} from './types.js'
import {looksLikeInstanceof} from './util.js'

const orpcServerOrError = await import('@orpc/server').catch(String)
const getOrpcServerModule = () => {
  if (typeof orpcServerOrError === 'string') {
    throw new Error(`@orpc/server must be installed. Error loading: ${orpcServerOrError}`)
  }
  return orpcServerOrError
}

// @ts-ignore zod is an optional peer dependency so might not be installed. oh well, you still get this one interface
declare module 'zod/v4' {
  export interface GlobalMeta {
    /**
     * If true, this property will be mapped to a positional CLI argument by trpc-cli. Only valid for string, number, or boolean types (or arrays of these types).
     * Note: the order of positional arguments is determined by the order of properties in the schema.
     * For example, the following are different:
     * - `z.object({abc: z.string().meta({positional: true}), xyz: z.string().meta({positional: true})})`
     * - `z.object({xyz: z.string().meta({positional: true}), abc: z.string().meta({positional: true})})`
     */
    positional?: boolean
    /**
     * If set, this value will be used an alias for the option.
     * Note: this is only valid for options, not positional arguments.
     */
    alias?: string
    /**
     * If true, this option will not appear in the --help output but will still be functional.
     */
    hidden?: boolean
  }
}

// @ts-ignore zod is an optional peer dependency so might not be installed. oh well, you still get this one interface
declare module 'zod' {
  export interface GlobalMeta {
    /**
     * If true, this property will be mapped to a positional CLI argument by trpc-cli. Only valid for string, number, or boolean types (or arrays of these types).
     * Note: the order of positional arguments is determined by the order of properties in the schema.
     * For example, the following are different:
     * - `z.object({abc: z.string().meta({positional: true}), xyz: z.string().meta({positional: true})})`
     * - `z.object({xyz: z.string().meta({positional: true}), abc: z.string().meta({positional: true})})`
     */
    positional?: boolean
    /**
     * If set, this value will be used an alias for the option.
     * Note: this is only valid for options, not positional arguments.
     */
    alias?: string
    /**
     * If true, this option will not appear in the --help output but will still be functional.
     */
    hidden?: boolean
  }
}

export * from './types.js'

/** @deprecated use `import * as trpcServer from '@trpc/server'` instead */
export const trpcServer = "@deprecated use `import * as trpcServer from '@trpc/server'` instead"

/** @deprecated use `import {z} from "zod/v4"` instead (or use zod/v3 if you need to support use an old version of zod) */
export const z =
  '@deprecated use `import {z} from "zod/v4"` instead (or use zod/v3 if you need to support use an old version of zod)'
/** @deprecated use `import {z} from "zod/v4"` instead (or use zod/v3 if you need to support use an old version of zod) */
export const zod =
  '@deprecated use `import {z} from "zod/v4"` instead (or use zod/v3 if you need to support use an old version of zod)'

export class Command extends BaseCommand {
  /** @internal track the commands that have been run, so that we can find the `__result` of the last command */
  __ran: Command[] = []
  __input?: unknown
  /** @internal stash the return value of the underlying procedure on the command so to pass to `FailedToExitError` for use in a pinch */
  __result?: unknown
  /** @internal stash the argv so it's accessible from action handlers via cli context */
  __argv?: string[]
}

/** re-export of the @trpc/server package, just to avoid needing to install manually when getting started */

export {type AnyRouter, type AnyProcedure, type NorpcProcedureLike, type NorpcRouterLike} from './parse-router.js'
export {parseRouter} from './parse-router.js'

/**
 * Run a trpc router as a CLI.
 *
 * @param router A trpc router
 * @param context The context to use when calling the procedures - needed if your router requires a context
 * @param trpcServer The trpc server module to use. Only needed if using trpc v10.
 * @returns A CLI object with a `run` method that can be called to run the CLI. The `run` method will parse the command line arguments, call the appropriate trpc procedure, log the result and exit the process. On error, it will log the error and exit with a non-zero exit code.
 */
export function createCli<R extends AnyRouter>({router, ...params}: TrpcCliParams<R>): TrpcCli {
  const procedureEntries = parseRouter({router, ...params})

  function buildProgram(runParams?: TrpcCliRunParams) {
    const logger = {...lineByLineConsoleLogger, ...runParams?.logger}
    const program = new Command(params.name)

    if (params.version) program.version(params.version)
    if (params.description) program.description(params.description)
    if (params.usage) [params.usage].flat().forEach(usage => program.usage(usage))

    program.showHelpAfterError()
    program.showSuggestionAfterError()

    // Organize commands in a tree structure for nested subcommands
    const commandTree: Record<string, Command> = {
      '': program, // Root level
    }

    // Keep track of default commands for each parent path
    const defaultCommands: Record<
      string,
      {
        procedurePath: string
        config: (typeof procedureEntries)[0][1]
        command: Command
      }
    > = {}

    const _process = runParams?.process || process
    const configureCommand = (command: Command, procedurePath: string, info: ProcedureInfo) => {
      const {meta} = info
      const parsedProcedure = getParsedProcedure(info)
      const incompatiblePairs = incompatiblePropertyPairs(parsedProcedure.optionsJsonSchema)
      // add meta to the commander command so we can access it in prompt.ts
      Object.assign(command, {__trpcCli: {path: procedurePath, meta, originalInputSchema: info.originalInputSchema}})
      const optionJsonSchemaProperties = flattenedProperties(parsedProcedure.optionsJsonSchema)
      command.exitOverride(ec => {
        _process.exit(ec.exitCode)
        throw new FailedToExitError(`Command ${command.name()} exitOverride`, {exitCode: ec.exitCode, cause: ec})
      })
      command.configureOutput({
        writeOut: str => {
          logger.info?.(str)
        },
        writeErr: str => {
          logger.error?.(str)
        },
      })
      command.showHelpAfterError()

      if (meta.usage) command.usage([meta.usage].flat().join('\n'))
      if (meta.examples) command.addHelpText('after', `\nExamples:\n${[meta.examples].flat().join('\n')}`)

      meta?.aliases?.command?.forEach(alias => {
        command.alias(alias)
      })

      command.description(meta?.description || '')

      parsedProcedure.positionalParameters.forEach(param => {
        const descriptionParts = [
          param.type === 'string' ? '' : param.type, // "string" is the default assumption, don't bother showing it
          param.description,
          param.required ? '(required)' : '',
        ]
        const argument = new Argument(param.name, descriptionParts.filter(Boolean).join(' '))
        if (param.type === 'number') {
          argument.argParser(value => {
            const number = numberParser(value, {fallback: null})
            if (number == null) throw new InvalidArgumentError(`Invalid number: ${value}`)
            return value
          })
        }
        argument.required = param.required
        argument.variadic = param.array
        command.addArgument(argument)
      })

      const unusedOptionAliases: Record<string, string> = {...meta.aliases?.options}
      const addOptionForProperty = ([propertyKey, propertyValue]: [string, JSONSchema7]) => {
        class Option extends BaseOption {
          attributeName() {
            return propertyKey // by default commander uses camelcase(this.name()) which turns `use-mcp-server` into `useMcpServer` - when it might be `useMCPServer`
          }
        }
        const description = getDescription(propertyValue)

        const longOption = `--${kebabCase(propertyKey)}`
        let flags = longOption
        const alias =
          propertyValue && 'alias' in propertyValue && typeof propertyValue.alias === 'string'
            ? propertyValue.alias
            : meta.aliases?.options?.[propertyKey]
        if (alias) {
          let prefix = '-'
          if (alias.startsWith('-')) prefix = ''
          else if (alias.length > 1) prefix = '--'

          flags = `${prefix}${alias}, ${flags}`
          delete unusedOptionAliases[propertyKey]
        }

        const isHidden = 'hidden' in propertyValue && propertyValue.hidden === true
        const addOption = (opt: InstanceType<typeof BaseOption>) => {
          if (isHidden) opt.hideHelp()
          command.addOption(opt)
        }

        const allowedSchemas = getAllowedSchemas(propertyValue)
        const firstSchemaWithDefault = allowedSchemas.find(subSchema => 'default' in subSchema)
        // Check for default value - first in the allowed schemas, then on the root property itself
        const defaultValue =
          firstSchemaWithDefault && 'default' in firstSchemaWithDefault
            ? ({exists: true, value: firstSchemaWithDefault.default} as const)
            : 'default' in propertyValue
              ? ({exists: true, value: propertyValue.default} as const)
              : ({exists: false} as const)

        const rootTypes = getSchemaTypes(propertyValue).sort()

        const propertyType = rootTypes[0]
        const isValueRequired =
          'required' in parsedProcedure.optionsJsonSchema &&
          parsedProcedure.optionsJsonSchema.required?.includes(propertyKey)
        const isCliOptionRequired = isValueRequired && propertyType !== 'boolean' && !defaultValue.exists

        function negate() {
          const shouldNegate = 'negatable' in propertyValue ? propertyValue.negatable : meta.negateBooleans
          if (shouldNegate) {
            const negation = new Option(longOption.replace('--', '--no-'), `Negate \`${longOption}\` option.`.trim())
            command.addOption(negation)
          }
        }

        const bracketise = (name: string) => (isCliOptionRequired ? `<${name}>` : `[${name}]`)

        // Check if this is an enum (including union of literals like z.union([z.literal('foo'), z.literal('bar')]))
        // If so, handle it as a string with choices, not as a multi-type union
        const enumChoices = getEnumChoices(propertyValue)
        if (enumChoices?.type === 'string_enum') {
          const option = new Option(`${flags} ${bracketise('string')}`, description)
          option.choices(enumChoices.choices)
          if (defaultValue.exists) option.default(defaultValue.value)
          addOption(option)
          return
        }

        if (allowedSchemas.length > 1) {
          const option = new Option(`${flags} [value]`, description)
          if (defaultValue.exists) option.default(defaultValue.value)
          else if (rootTypes.includes('boolean')) option.default(false)
          option.argParser(getOptionValueParser(propertyValue))
          addOption(option)
          if (rootTypes.includes('boolean')) negate()
          return
        }

        if (rootTypes.length !== 1) {
          const option = new Option(`${flags} ${bracketise('json')}`, description)
          option.argParser(getOptionValueParser(propertyValue))
          addOption(option)
          return
        }

        if (propertyType === 'boolean') {
          const option = new Option(`${flags} [boolean]`, description)
          option.argParser(value => booleanParser(value))
          // don't set a default value of `false`, because `undefined` is accepted by the procedure
          if (isValueRequired) option.default(false)
          else if (defaultValue.exists) option.default(defaultValue.value)
          addOption(option)
          negate()
          return
        }

        let option: Option | null = null

        if (propertyType === 'string') {
          option = new Option(`${flags} ${bracketise('string')}`, description)
        } else if (propertyType === 'boolean') {
          option = new Option(flags, description)
        } else if (propertyType === 'number' || propertyType === 'integer') {
          option = new Option(`${flags} ${bracketise('number')}`, description)
          option.argParser(value => numberParser(value, {fallback: null}))
        } else if (propertyType === 'array') {
          option = new Option(`${flags} [values...]`, description)
          if (defaultValue.exists) option.default(defaultValue.value)
          else if (isValueRequired) option.default([])
          const itemsSchema = 'items' in propertyValue ? (propertyValue.items as JSONSchema7) : {}

          const itemEnumTypes = getEnumChoices(itemsSchema)
          if (itemEnumTypes?.type === 'string_enum') {
            option.choices(itemEnumTypes.choices)
          }

          const itemParser = getOptionValueParser(itemsSchema)
          if (itemParser) {
            option.argParser((value, previous): unknown[] => {
              const parsed = itemParser(value)
              return Array.isArray(previous) ? [...previous, parsed] : [parsed]
            })
          }
        }
        if (!option) {
          option = new Option(`${flags} [json]`, description)
          option.argParser(value => parseJson(value, InvalidOptionArgumentError))
        }
        if (defaultValue.exists && option.defaultValue !== defaultValue.value) {
          option.default(defaultValue.value)
        }

        if (option.flags.includes('<')) {
          option.makeOptionMandatory()
        }

        // Note: enum choices for union of literals are handled earlier (before allowedSchemas.length > 1 check)
        // This handles z.enum() style enums which don't go through the multi-schema path
        const propertyEnumChoices = getEnumChoices(propertyValue)
        if (propertyEnumChoices?.type === 'string_enum') {
          option.choices(propertyEnumChoices.choices)
        }

        option.conflicts(
          incompatiblePairs.flatMap(pair => {
            const filtered = pair.filter(p => p !== propertyKey)
            if (filtered.length === pair.length) return []
            return filtered
          }),
        )

        addOption(option)
        if (propertyType === 'boolean') negate() // just in case we refactor the code above and don't handle booleans as a special case
      }

      Object.entries(optionJsonSchemaProperties).forEach(addOptionForProperty)

      const invalidOptionAliases = Object.entries(unusedOptionAliases).map(([option, alias]) => `${option}: ${alias}`)
      if (invalidOptionAliases.length) {
        throw new Error(`Invalid option aliases: ${invalidOptionAliases.join(', ')}`)
      }

      // Set the action for this command
      command.action(async (...args) => {
        program.__ran ||= []
        program.__ran.push(command)
        const options = command.opts()

        if (args.at(-2) !== options) {
          // This is a code bug and not recoverable. Will hopefully never happen but if commander totally changes their API this will break
          throw new Error(`Unexpected args format, second last arg is not the options object`, {cause: args})
        }
        if (args.at(-1) !== command) {
          // This is a code bug and not recoverable. Will hopefully never happen but if commander totally changes their API this will break
          throw new Error(`Unexpected args format, last arg is not the Command instance`, {cause: args})
        }

        // the last arg is the Command instance itself, the second last is the options object, and the other args are positional
        const positionalValues = args.slice(0, -2)

        const input = parsedProcedure.getPojoInput({positionalValues, options})

        let caller: Record<string, (input: unknown) => unknown>
        const deprecatedCreateCaller = Reflect.get(params, 'createCallerFactory') as CreateCallerFactoryLike | undefined
        if (deprecatedCreateCaller) {
          const message = `Using deprecated \`createCallerFactory\` option. Use \`trpcServer\` instead. e.g. \`createCli({router: myRouter, trpcServer: import('@trpc/server')})\``
          logger.error?.(message)
          caller = deprecatedCreateCaller(router)(params.context)
        } else if (isNorpcRouter(router)) {
          // eslint-disable-next-line @typescript-eslint/no-explicit-any
          let proc = router as any
          for (const part of procedurePath.split('.')) proc = proc[part]
          caller = {[procedurePath]: (_input: unknown) => proc.call(_input, params.context) as unknown}
        } else if (isTrpcRouter(router)) {
          const resolvedTrpcServer = await (params.trpcServer ||
            (await import('@trpc/server').catch(e => {
              throw new Error(`@trpc/server must be installed when using tRPC-style routers. Error loading: ${e}`)
            })))
          const createCallerFactor = resolvedTrpcServer.initTRPC.create().createCallerFactory as CreateCallerFactoryLike
          caller = createCallerFactor(router)(params.context)
        } else {
          const {call} = getOrpcServerModule()
          // create an object which acts enough like a trpc caller to be used for this specific procedure
          const procedure = procedurePath
            .split('.')
            .reduce((acc, part) => acc[part] as Record<string, unknown>, router as Record<string, unknown>)
          caller = {[procedurePath]: (_input: unknown) => call(procedure as never, _input, {context: params.context})}
        }

        // Derive leaf command's argv from the program's argv by stripping the routing segments.
        // e.g. for procedurePath 'math.add' and program.__argv ['math', 'add', '--a', '2'],
        // the leaf command gets ['--a', '2'].
        const leafSegmentCount = procedurePath.split('.').length
        command.__argv = (program.__argv ?? []).slice(leafSegmentCount)

        const cliContext = {program, command}

        const result = await runWithCliContext(cliContext, () =>
          (caller[procedurePath](input) as Promise<unknown>).catch(err => {
            throw transformError(err, command)
          }),
        )
        command.__result = result
        if (result != null) logger.info?.(result)
      })
    }

    // Process each procedure and add as a command or subcommand
    procedureEntries.forEach(([procedurePath, commandConfig]) => {
      const segments = procedurePath.split('.')

      // Create the command path and ensure parent commands exist
      let currentPath = ''
      for (let i = 0; i < segments.length - 1; i++) {
        const segment = segments[i]
        const parentPath = currentPath
        currentPath = currentPath ? `${currentPath}.${segment}` : segment

        // Create parent command if it doesn't exist
        if (!commandTree[currentPath]) {
          const parentCommand = commandTree[parentPath]
          const newCommand = new Command(kebabCase(segment))
          newCommand.showHelpAfterError()
          parentCommand.addCommand(newCommand)
          commandTree[currentPath] = newCommand
        }
      }

      // Create the actual leaf command
      const leafName = segments.at(-1)
      const parentPath = segments.length > 1 ? segments.slice(0, -1).join('.') : ''
      const parentCommand = commandTree[parentPath]

      const leafCommand = new Command(leafName && kebabCase(leafName))
      configureCommand(leafCommand, procedurePath, commandConfig)
      parentCommand.addCommand(leafCommand)

      // Check if this command should be the default for its parent
      const meta = commandConfig.meta
      if (meta.default === true) {
        // the parent will pass on its args straight to the child, which will validate them. the parent just blindly accepts anything.
        parentCommand.allowExcessArguments()
        parentCommand.allowUnknownOption()
        parentCommand.addHelpText('after', leafCommand.helpInformation())
        parentCommand.action(async () => {
          await leafCommand.parseAsync([...parentCommand.args], {from: 'user'})
        })

        // ancestors need to support positional options to pass through the positional args
        // for (let ancestor = parentCommand.parent, i = 0; ancestor && i < 10; ancestor = ancestor.parent, i++) {
        //   ancestor.enablePositionalOptions()
        // }
        // parentCommand.passThroughOptions()

        defaultCommands[parentPath] = {
          procedurePath: procedurePath,
          config: commandConfig,
          command: leafCommand,
        }
      }
    })

    // After all commands are added, generate descriptions for parent commands
    Object.entries(commandTree).forEach(([path, command]) => {
      // Skip the root command and leaf commands (which already have descriptions)
      // if (path === '' || command.commands.length === 0) return
      if (command.commands.length === 0) return

      // Get the names of all direct subcommands
      const subcommandNames = command.commands.map(cmd => cmd.name())

      // Check if there's a default command for this path
      const defaultCommand = defaultCommands[path]?.command.name()

      // Format the subcommand list, marking the default one
      const formattedSubcommands = subcommandNames
        .map(name => (name === defaultCommand ? `${name} (default)` : name))
        .join(', ')

      // Get the existing description (might have been set by a default command)
      const existingDescription = command.description() || ''

      // Only add the subcommand list if it's not already part of the description
      const descriptionParts = [existingDescription, `Available subcommands: ${formattedSubcommands}`]

      command.description(descriptionParts.filter(Boolean).join('\n'))
    })

    return program
  }

  const run: TrpcCli['run'] = async (runParams?: TrpcCliRunParams, program = buildProgram(runParams)) => {
    if (!looksLikeInstanceof<Command>(program, 'Command')) throw new Error(`program is not a Command instance`)
    const opts = runParams?.argv ? ({from: 'user'} as const) : undefined
    const argv = [...(runParams?.argv || process.argv)]

    const _process = runParams?.process || process
    const logger = {...lineByLineConsoleLogger, ...runParams?.logger}

    program.exitOverride(exit => {
      _process.exit(exit.exitCode)
      throw new FailedToExitError('Root command exitOverride', {exitCode: exit.exitCode, cause: exit})
    })
    program.configureOutput({
      writeOut: str => logger.info?.(str),
      writeErr: str => logger.error?.(str),
    })

    if (runParams?.completion) {
      const completion =
        typeof runParams.completion === 'function' ? await runParams.completion() : runParams.completion
      addCompletions(program, completion)
    }

    const formatError =
      runParams?.formatError ||
      ((err: unknown) => {
        if (err instanceof CliValidationError) {
          return err.message
        }
        return inspect(err)
      })

    if (runParams?.prompts) {
      program = promptify(program, runParams.prompts) as Command
    }

    // Store the argv that commander will parse in "user" mode.
    // When argv is provided via run({argv}), it's used as-is (already "user" args).
    // When falling back to process.argv, strip the `node script.js` prefix.
    ;(program as Command).__argv = runParams?.argv ? argv : argv.slice(2)

    await program.parseAsync(argv, opts).catch(err => {
      if (err instanceof FailedToExitError) throw err
      const logMessage = looksLikeInstanceof(err, Error)
        ? formatError(err) || err.message
        : `Non-error of type ${typeof err} thrown: ${err}`
      logger.error?.(logMessage)
      _process.exit(1)
      throw new FailedToExitError(`Program exit after failure`, {exitCode: 1, cause: err})
    })
    _process.exit(0)
    throw new FailedToExitError('Program exit after success', {
      exitCode: 0,
      cause: (program as Command).__ran.at(-1)?.__result,
    })
  }

  return {run, buildProgram, toJSON: (program = buildProgram()) => commandToJSON(program as Command)}
}

export const kebabCase = (str: string) =>
  str
    .replaceAll(/([\da-z])([A-Z])/g, '$1-$2')
    .replaceAll(/([A-Z]+)([A-Z][a-z])/g, '$1-$2')
    .toLowerCase()

/** @deprecated renamed to `createCli` */
export const trpcCli = createCli

function transformError(err: unknown, command: Command) {
  if (looksLikeInstanceof(err, Error) && err.message.includes('This is a client-only function')) {
    return new Error(
      'Failed to create trpc caller. If using trpc v10, either upgrade to v11 or pass in the `@trpc/server` module to `createCli` explicitly',
    )
  }

  type TRPCErrorLike = Error & {cause: Error; code: 'BAD_REQUEST' | 'INTERNAL_SERVER_ERROR' | (string & {})}
  if (looksLikeInstanceof<TRPCErrorLike>(err, 'TRPCError') || looksLikeInstanceof<TRPCErrorLike>(err, 'ORPCError')) {
    const cause = err.cause
    if (looksLikeStandardSchemaFailure(cause)) {
      const prettyMessage = prettifyStandardSchemaError(cause)
      return new CliValidationError(prettyMessage + '\n\n' + command.helpInformation())
    }

    if (
      err.code === 'BAD_REQUEST' &&
      (err.cause?.constructor?.name === 'TraversalError' || // arktype error
        err.cause?.constructor?.name === 'StandardSchemaV1Error') // valibot error
    ) {
      return new CliValidationError(err.cause.message + '\n\n' + command.helpInformation())
    }
    if (err.code === 'INTERNAL_SERVER_ERROR') {
      return cause
    }
  }
  return err
}

export {FailedToExitError, CliValidationError} from './errors.js'
export {getCliContext, type CliContextValue, type CliCommand} from './context.js'
export {
  autoTableConsoleLogger,
  autoTableLogger,
  lineByLineConsoleLogger,
  lineByLineLogger,
  yamlConsoleLogger,
  yamlTableConsoleLogger,
  yamlTableLogger,
  yamlLogger,
} from './logging.js'
export {toYaml} from './yaml.js'

const numberParser = (val: string, {fallback = val as unknown} = {}) => {
  const number = Number(val)
  return Number.isNaN(number) ? fallback : number
}

const booleanParser = (val: string, {fallback = val as unknown} = {}) => {
  if (val === 'true') return true
  if (val === 'false') return false
  return fallback
}

const getOptionValueParser = (schema: JSONSchema7) => {
  const allowedSchemas = getAllowedSchemas(schema)
    .slice()
    .sort((a, b) => String(getSchemaTypes(a)[0]).localeCompare(String(getSchemaTypes(b)[0])))

  const typesArray = allowedSchemas.flatMap(getSchemaTypes)
  const types = new Set(typesArray)

  return (value: string) => {
    const definitelyPrimitive = typesArray.every(
      t => t === 'boolean' || t === 'number' || t === 'integer' || t === 'string',
    )
    if (types.size === 0 || !definitelyPrimitive) {
      // parse this as JSON - too risky to fall back to a string because that will probably do the wrong thing if someone passes malformed JSON like `{"foo": 1,}` (trailing comma)
      const hint = `Malformed JSON. If passing a string, pass it as a valid JSON string with quotes (${JSON.stringify(value)})`
      const parsed = parseJson(value, InvalidOptionArgumentError, hint)
      if (!types.size) return parsed // if types is empty, it means any type is allowed - e.g. for json input
      const jsonSchemaType = Array.isArray(parsed) ? 'array' : parsed === null ? 'null' : typeof parsed
      if (!types.has(jsonSchemaType)) {
        throw new InvalidOptionArgumentError(`Got ${jsonSchemaType} but expected ${[...types].join(' or ')}`)
      }
      return parsed
    }
    if (types.has('boolean')) {
      const parsed = booleanParser(value, {fallback: null})
      if (typeof parsed === 'boolean') return parsed
    }
    if (types.has('number')) {
      const parsed = numberParser(value, {fallback: null})
      if (typeof parsed === 'number') return parsed
    }
    if (types.has('integer')) {
      const parsed = numberParser(value, {fallback: null})
      if (typeof parsed === 'number' && Number.isInteger(parsed)) return parsed
    }
    if (types.has('string')) {
      return value
    }
    throw new InvalidOptionArgumentError(`Got ${JSON.stringify(value)} but expected ${[...types].join(' or ')}`)
  }
}

const parseJson = (
  value: string,
  ErrorClass: new (message: string) => Error = InvalidArgumentError,
  hint = `Malformed JSON.`,
) => {
  try {
    return JSON.parse(value) as {}
  } catch {
    throw new ErrorClass(hint)
  }
}

export {t, os} from './norpc.js'