import pathModule from "path"

import { removeTrailingSlash } from "./general"

/**
 * Parses the appName and its path from the user input.
 *
 * Returns a tuple of of `[appName, path]`, where `appName` is the name put in the "package.json"
 * file and `path` is the path to the directory where the app will be created.
 *
 * If `appName` is ".", the name of the directory will be used instead. Handles the case where the
 * input includes a scoped package name in which case that is being parsed as the name, but not
 * included as the path.
 *
 * For example:
 *
 * - dir/@mono/app => ["@mono/app", "dir/app"]
 * - dir/app => ["app", "dir/app"]
 */

export const parseNameAndPath = (rawInput: string) => {
    const input = removeTrailingSlash(rawInput)

    const paths = input.split("/")

    let appName = paths.length > 0 ? paths[paths.length - 1] : ""

    // If the user ran `npx create-permissionless-app .` or similar, the appName should be the current directory
    if (appName === ".") {
        const parsedCwd = pathModule.resolve(process.cwd())
        appName = pathModule.basename(parsedCwd)
    }

    // If the first part is a @, it's a scoped package
    const indexOfDelimiter = paths.findIndex((p) => p.startsWith("@"))
    if (indexOfDelimiter !== -1) {
        appName = paths.slice(indexOfDelimiter).join("/")
    }

    const path = paths.filter((p) => !p.startsWith("@")).join("/")

    return [appName, path] as const
}