import { setTimeoutRef } from "./utils/SetTimeoutRef";

import { isString } from "../utils/helpers/isString";
import { AllServers } from "./Server/AllServers";

export function netscriptDelay(time, workerScript) {
    return new Promise(function(resolve) {
       workerScript.delay = setTimeoutRef(() => {
           workerScript.delay = null;
           resolve();
       }, time);
       workerScript.delayResolve = resolve;
   });
}

export function makeRuntimeRejectMsg(workerScript, msg, exp=null) {
    var lineNum = "";
    if (exp != null) {
        var num = getErrorLineNumber(exp, workerScript);
        lineNum = " (Line " + num + ")"
    }
    const server = AllServers[workerScript.serverIp];
    if (server == null) {
        throw new Error(`WorkerScript constructed with invalid server ip: ${this.serverIp}`);
    }

    return "|"+server.hostname+"|"+workerScript.name+"|" + msg + lineNum;
}

export function resolveNetscriptRequestedThreads(workerScript, functionName, requestedThreads) {
    const threads = workerScript.scriptRef.threads;
    if (!requestedThreads) {
        return (isNaN(threads) || threads < 1) ? 1 : threads;
    }
    const requestedThreadsAsInt = requestedThreads|0;
    if (isNaN(requestedThreads) || requestedThreadsAsInt < 1) {
        throw makeRuntimeRejectMsg(workerScript, `Invalid thread count passed to ${functionName}: ${requestedThreads}. Threads must be a positive number.`);
    }
    if (requestedThreads > threads) {
        throw makeRuntimeRejectMsg(workerScript, `Too many threads requested by ${functionName}. Requested: ${requestedThreads}. Has: ${threads}.`);
    }
    return requestedThreadsAsInt;
}


export function getErrorLineNumber(exp, workerScript) {
    var code = workerScript.scriptRef.codeCode();

    //Split code up to the start of the node
    try {
        code = code.substring(0, exp.start);
        return (code.match(/\n/g) || []).length + 1;
    } catch(e) {
        return -1;
    }
}

export function isScriptErrorMessage(msg) {
    if (!isString(msg)) {return false;}
    let splitMsg = msg.split("|");
    if (splitMsg.length != 4){
        return false;
    }
    return true;
}