const isNumString = (str: string): boolean => !isNaN(Number(str))

type JsonObject = { [key: string]: unknown }
type JsonArray = Array<unknown>
type Json = JsonObject | JsonArray | string | number | boolean | null

function deepParseJson(jsonString: Json): Json {
    if (typeof jsonString === 'string') {
        if (isNumString(jsonString)) {
            return jsonString
        }
        try {
            return deepParseJson(JSON.parse(jsonString))
        } catch {
            return jsonString
        }
    } else if (Array.isArray(jsonString)) {
        return jsonString.map((val) => deepParseJson(val as JsonArray))
    } else if (typeof jsonString === 'object' && jsonString !== null) {
        return Object.keys(jsonString).reduce<JsonObject>((obj, key) => {
            const val = jsonString[key]
            obj[key] = isNumString(val as string)
                ? val
                : deepParseJson(val as number)
            return obj
        }, {})
    } else {
        return jsonString
    }
}

export default deepParseJson