import {

type AstNode,

CodeModeFunction,

InterpreterRuntimeError,

supportedSyntaxMessage,

} from "../interpreter/model.js"

import { copyIn, copyOut } from "../tool-runtime.js"

export const jsonStatics = new Set(["stringify", "parse"])

export const invokeJsonMethod = (name: string, args: Array<unknown>, node: AstNode): unknown => {

if (!jsonStatics.has(name)) throw new InterpreterRuntimeError(`JSON.${name} is not available in CodeMode.`, node)

switch (name) {

case "stringify": {

const replacer = args[1]

if (Array.isArray(replacer) || replacer instanceof CodeModeFunction) {

throw new InterpreterRuntimeError(

"JSON.stringify replacers are not supported in CodeMode.",

node,

"UnsupportedSyntax",

[supportedSyntaxMessage],

)

}

const space = args[2]

const indent = typeof space === "number" || typeof space === "string" ? space : undefined

return JSON.stringify(copyOut(copyIn(args[0], "JSON.stringify value")), null, indent)

}

case "parse": {

const text = args[0]

if (typeof text !== "string") throw new InterpreterRuntimeError("JSON.parse expects a string.", node)

try {

return copyIn(JSON.parse(text), "JSON.parse result")

} catch (error) {

throw new InterpreterRuntimeError(

`JSON.parse received invalid JSON: ${error instanceof Error ? error.message : String(error)}`,

node,

).as("SyntaxError")

}

}

}

throw new InterpreterRuntimeError(`JSON.${name} is not available in CodeMode.`, node)

}