import { doesFileExist, loadFile, type FileHandle } from "./filesystem-utils";
import { SERVER_PRIVATE_KEY_PATH, SERVER_PUBLIC_KEY_PATH } from "./constants";
import { shell, type shellOutput } from "./shell-commands";

export async function openSSLInit() {

    await openSSLCreatePrivateKey()
    await openSSLCreatePublicKey()

}

export async function openSSLCreatePrivateKey() {

    // UGLY: may be refactored to output only the private key
    const outputPromise =  shell(`openssl ecparam -genkey -name secp521r1 -noout | openssl pkcs8 -topk8 -nocrypt`)
    // const outputPromise = $`openssl ecparam -genkey -name secp521r1 -noout | openssl pkcs8 -topk8 -nocrypt`.text()
    const filePromise = loadFile(SERVER_PRIVATE_KEY_PATH, true)

    const [output, file] : [shellOutput, FileHandle]= await Promise.all([
        outputPromise,
        filePromise
    ])

    await file.write(output.stdout)

}


export async function openSSLCreatePublicKey() {

    // UGLY: may be refactored to output only the private key
    if (! await doesFileExist(SERVER_PRIVATE_KEY_PATH)) {
        // UGLY: make more specific
        throw new Error("You must generate the private key before attempting to generate the public one")
    }

    const outputPromise = shell(`openssl ec -in ${SERVER_PRIVATE_KEY_PATH} -pubout `)
    const filePromise = loadFile(SERVER_PUBLIC_KEY_PATH, true)

    const [output, file] = await Promise.all([
        outputPromise,
        filePromise
    ])

    await file.write(output.stdout)

}