/** @param {import(".").NS } ns */
export async function main(ns) {
    // ns.disableLog('ALL');

    /**
     * @constant
     * @default
     */
    const EXPLOITS = [
        'BruteSSH.exe',
        'FTPCrack.exe',
        'relaySMTP.exe',
        'HTTPWorm.exe',
        'SQLInject.exe'
    ];

    /** @function maxPortsToHack
     * Calculate how many ports you're able to open
     * @returns {number} number of ports you're able to open
     */
    function maxPortsToHack() {
        let maxPorts = 0;
        EXPLOITS.forEach(exploit => {
            if (ns.fileExists(exploit)) ++maxPorts;
        });
        // ns.tprint(`Max ports for hacking ${maxPorts}`);
        return maxPorts;
    }

    /** @function analyzeServer
     * Analyze server requirements
     * @param {string} server 
     * @returns {object} object containing server information
     */
    function analyzeServer(server) {
        let requiredHacking = ns.getServerRequiredHackingLevel(server);
        let requiredPorts = ns.getServerNumPortsRequired(server);
        let currentHacking = ns.getHackingLevel();

        return {
            "rootAccess": ns.hasRootAccess(server),
            "requiredHacking": requiredHacking,
            "requiredPorts": requiredPorts,
            "nukeAvailable": (currentHacking >= requiredHacking && maxPortsToHack() >= requiredPorts)
        };
    }

    /** @function runHack
     * Recursively scan, try to nuke and hack servers in the network
     * @param {string} server server to nuke and hack
     * @returns {number} exit code; if negative error, if positive hack script PID, if 0 already running
     */
    function runHack(server) {
        let script = 'simple-hack.js';

        let serverStatus = analyzeServer(server);
        ns.tprint(`${server}: ${JSON.stringify(serverStatus)}`);

        if (!serverStatus.rootAccess) {
            if (serverStatus.nukeAvailable) {
                ns.tprint(`Nuking ${server}!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!`);
                for (let i = 0; i < maxPortsToHack(); ++i) {
                    switch (EXPLOITS[i]) {
                        case 'BruteSSH.exe':
                            ns.brutessh(server);
                            break;

                        case 'FTPCrack.exe':
                            ns.ftpcrack(server);
                            break;

                        case 'relaySMTP.exe':
                            ns.relaysmtp(server);
                            break;

                        case 'HTTPWorm.exe':
                            ns.httpworm(server);
                            break;

                        case 'SQLInject.exe':
                            ns.sqlinject(server);
                            break;

                    }
                }
                ns.nuke(server);
            }
        }

        serverStatus = analyzeServer(server);

        if (serverStatus.rootAccess) {
            if (!ns.fileExists(script, 'home')) {
                ns.tprint(`Script '${script}' doesn't exist!`);
                return -3;
            }
            ns.scp(script, server, 'home');

            let serverMaxRam = ns.getServerMaxRam(server);
            let serverUsedRam = ns.getServerUsedRam(server);
            let serverFreeRam = serverMaxRam - serverUsedRam;
            let scriptRam = ns.getScriptRam(script, server);
            let maxThreads = Math.floor(serverFreeRam / scriptRam);

            let a = ns.scriptRunning(script, server);
            if (!a) {
                if (maxThreads == 0) {
                    ns.tprint(`Not enough ram to run '${script}' on '${server}', ${scriptRam}/${serverFreeRam}!`);
                    return -4;
                }
                let execExitCode = ns.exec(script, server, maxThreads, server);
                ns.tprint(`post exec ${execExitCode}`);
                if (!execExitCode) {
                    ns.tprint(`Exec error running script '${script} on '${server}!`);
                    return -5;
                }
                else {
                    return execExitCode;
                }
            } else {
                ns.tprint(`Hack already running on ${server}`);
                return 0;
            }
        }

        return -6;
    }

    let nukedServers = ['home', 'CSEC'];
    /**
     * Recursively scan, try to nuke and hack servers in the network
     * @async
     * @param {string} server server to scan
     */
    async function scanServer(server, maxDepth = Number.MAX_SAFE_INTEGER, depth = 1) {
        if (depth <= maxDepth) {
            let availableServers = ns.scan(server);

            // hack servers in current scan
            for (let i = 0; i < availableServers.length; ++i) {
                ns.tprint(`${availableServers[i]} ${nukedServers.indexOf(availableServers[i])} ${nukedServers}`);
                if (nukedServers.indexOf(availableServers[i]) == -1) {
                    nukedServers.push(availableServers[i]);
                    await scanServer(availableServers[i], maxDepth, depth + 1);
                    let hackExitCode = runHack(availableServers[i]);

                    if (hackExitCode == 0) {
                        ns.tprint(`Hack already running on ${availableServers[i]}`);
                    } if (hackExitCode == -6) {
                        ns.tprint(`No root access to ${availableServers[i]}!`);
                    } else {
                        if (hackExitCode < 0) {
                            ns.tprint(`Hack exec ERROR on '${availableServers[i]}': ${hackExitCode}!`);
                        } else {
                            ns.tprint(`Hack started on '${availableServers[i]}'`);
                        }
                    }
                }
            }
        }
        await ns.sleep(10);
    }

    let runDepth = ns.args.length ? ns.args[0] : 1;
    ns.tprint(`Running scan depth: ${runDepth}`);
    await scanServer('home', );


    // let serversToNuke = {};
    // let availableServers = { "home": "home" };

    // for (let depth = 0; depth < 2; ++depth) {
    //     for (const key in availableServers) {
    //         if (Object.hasOwnProperty.call(availableServers, key)) {
    //             const element = availableServers[key];

    //             ns.scan(element).forEach(elem => {
    //                 availableServers[elem] = elem;
    //             });
    //         }
    //     }
    // }

    // ns.tprint(availableServers);

    // for (const element in availableServers) {
    //     ns.tprint(`start loop ${element}`);

    //     if (element != 'home' && element != 'CSEC') {
    //         let hackExitCode = runHack(element);

    //         if (hackExitCode == 0) {
    //             ns.tprint(`Hack already running on ${element}`);
    //         } if (hackExitCode == -6) {
    //             ns.tprint(`No root access to ${element}`);
    //         } else {
    //             if (hackExitCode < 0) {
    //                 ns.tprint(`Hack exec ERROR on '${element}': ${hackExitCode}!`);
    //             } else {
    //                 ns.tprint(`Hack started on '${element}'`);
    //             }
    //         }
    //     }
    // }

    await ns.sleep(10);
}