// Class representing a single hackable Server
import { BaseServer } from "./BaseServer";

// TODO This import is a circular import. Try to fix it in the future
import { GetServerByHostname } from "./ServerHelpers";

import { BitNodeMultipliers } from "../BitNode/BitNodeMultipliers";

import { createRandomString } from "../utils/helpers/createRandomString";
import { createRandomIp } from "../../utils/IPAddress";
import { Generic_fromJSON,
         Generic_toJSON,
         Reviver } from "../../utils/JSONReviver";

interface IConstructorParams {
    adminRights?: boolean;
    hackDifficulty?: number;
    hostname: string;
    ip?: string;
    isConnectedTo?: boolean;
    maxRam?: number;
    moneyAvailable?: number;
    numOpenPortsRequired?: number;
    organizationName?: string;
    purchasedByPlayer?: boolean;
    requiredHackingSkill?: number;
    serverGrowth?: number;
}

export class Server extends BaseServer {
    // Initializes a Server Object from a JSON save state
    static fromJSON(value: any): Server {
        return Generic_fromJSON(Server, value.data);
    }

    // Initial server security level
    // (i.e. security level when the server was created)
    baseDifficulty: number = 1;

    // Server Security Level
    hackDifficulty: number = 1;

    // Flag indicating whether this server has been manually hacked (ie.
    // hacked through Terminal) by the player
    manuallyHacked: boolean = false;

    // Minimum server security level that this server can be weakened to
    minDifficulty: number = 1;

    // How much money currently resides on the server and can be hacked
    moneyAvailable: number = 0;

    // Maximum amount of money that this server can hold
    moneyMax: number = 0;

    // Number of open ports required in order to gain admin/root access
    numOpenPortsRequired: number = 5;

    // How many ports are currently opened on the server
    openPortCount: number = 0;

    // Flag indicating wehther this is a purchased server
    purchasedByPlayer: boolean = false;

    // Hacking level required to hack this server
    requiredHackingSkill: number = 1;

    // Parameter that affects how effectively this server's money can
    // be increased using the grow() Netscript function
    serverGrowth: number = 1;

    constructor(params: IConstructorParams={hostname: "", ip: createRandomIp() }) {
        super(params);

        // "hacknet-node-X" hostnames are reserved for Hacknet Servers
        if (this.hostname.startsWith("hacknet-node-")) {
            this.hostname = createRandomString(10);
        }

        // Validate hostname by ensuring there are no repeats
        if (GetServerByHostname(this.hostname) != null) {
            // Use a for loop to ensure that we don't get suck in an infinite loop somehow
            let hostname: string = this.hostname;
            for (let i = 0; i < 200; ++i) {
                hostname = `${this.hostname}-${i}`;
                if (GetServerByHostname(hostname) == null) { break; }
            }
            this.hostname = hostname;
        }

        this.purchasedByPlayer  =    params.purchasedByPlayer != null ? params.purchasedByPlayer  : false;

        //RAM, CPU speed and Scripts
        this.maxRam     = params.maxRam != null ? params.maxRam : 0;  //GB

        /* Hacking information (only valid for "foreign" aka non-purchased servers) */
        this.requiredHackingSkill   = params.requiredHackingSkill != null ? params.requiredHackingSkill : 1;
        this.moneyAvailable         = params.moneyAvailable != null       ? params.moneyAvailable * BitNodeMultipliers.ServerStartingMoney : 0;
        this.moneyMax               = 25 * this.moneyAvailable * BitNodeMultipliers.ServerMaxMoney;

        //Hack Difficulty is synonymous with server security. Base Difficulty = Starting difficulty
        this.hackDifficulty         = params.hackDifficulty != null ? params.hackDifficulty * BitNodeMultipliers.ServerStartingSecurity : 1;
        this.baseDifficulty         = this.hackDifficulty;
        this.minDifficulty          = Math.max(1, Math.round(this.hackDifficulty / 3));
        this.serverGrowth           = params.serverGrowth != null   ? params.serverGrowth : 1; //Integer from 0 to 100. Affects money increase from grow()

        //Port information, required for porthacking servers to get admin rights
        this.numOpenPortsRequired = params.numOpenPortsRequired != null ? params.numOpenPortsRequired : 5;
    };

    /**
     * Ensures that the server's difficulty (server security) doesn't get too high
     */
    capDifficulty(): void {
        if (this.hackDifficulty < this.minDifficulty) {this.hackDifficulty = this.minDifficulty;}
        if (this.hackDifficulty < 1) {this.hackDifficulty = 1;}

        // Place some arbitrarily limit that realistically should never happen unless someone is
        // screwing around with the game
        if (this.hackDifficulty > 1000000) {this.hackDifficulty = 1000000;}
    }

    /**
     * Change this server's minimum security
     * @param n - Value by which to increase/decrease the server's minimum security
     * @param perc - Whether it should be changed by a percentage, or a flat value
     */
    changeMinimumSecurity(n: number, perc: boolean=false): void {
        if (perc) {
            this.minDifficulty *= n;
        } else {
            this.minDifficulty += n;
        }

        // Server security cannot go below 1
        this.minDifficulty = Math.max(1, this.minDifficulty);
    }

    /**
     * Strengthens a server's security level (difficulty) by the specified amount
     */
    fortify(amt: number): void {
        this.hackDifficulty += amt;
        this.capDifficulty();
    }

    /**
     * Change this server's maximum money
     * @param n - Value by which to change the server's maximum money
     * @param perc - Whether it should be changed by a percentage, or a flat value
     */
    changeMaximumMoney(n: number, perc: boolean=false): void {
        if (perc) {
            this.moneyMax *= n;
        } else {
            this.moneyMax += n;
        }
    }

    /**
     * Lowers the server's security level (difficulty) by the specified amount)
     */
    weaken(amt: number): void {
        this.hackDifficulty -= (amt * BitNodeMultipliers.ServerWeakenRate);
        this.capDifficulty();
    }

    /**
     * Serialize the current object to a JSON save state
     */
    toJSON(): any {
        return Generic_toJSON("Server", this);
    }
}

Reviver.constructors.Server = Server;