import { removeTrailingSlash } from "./general"

const validationRegExp =
    /^(?:@[a-z0-9-*~][a-z0-9-*._~]*\/)?[a-z0-9-~][a-z0-9-._~]*$/

//Validate a string against allowed package.json names
export const validateAppName = (rawInput: string) => {
    const input = removeTrailingSlash(rawInput)
    const paths = input.split("/")

    // If the first part is a @, it's a scoped package
    const indexOfDelimiter = paths.findIndex((p) => p.startsWith("@"))

    let appName = paths[paths.length - 1]
    if (indexOfDelimiter !== -1) {
        appName = paths.slice(indexOfDelimiter).join("/")
    }

    if (input === "." || validationRegExp.test(appName ?? "")) {
        return
    }

    return "App name must consist of only lowercase alphanumeric characters, '-', and '_'"
}