SpaceNinjaServer/src/controllers/api/nemesisController.ts

import { fromDbOid, version_compare } from "../../helpers/inventoryHelpers.ts";
import type { IKnifeResponse } from "../../helpers/nemesisHelpers.ts";
import {
    antivirusMods,
    decodeNemesisGuess,
    encodeNemesisGuess,
    getInfNodes,
    getKnifeUpgrade,
    getNemesisManifest,
    getNemesisPasscode,
    GUESS_CORRECT,
    GUESS_INCORRECT,
    GUESS_NEUTRAL,
    GUESS_NONE,
    GUESS_WILDCARD,
    parseUpgrade
} from "../../helpers/nemesisHelpers.ts";
import { getJSONfromString } from "../../helpers/stringHelpers.ts";
import type { TInventoryDatabaseDocument } from "../../models/inventoryModels/inventoryModel.ts";
import { Loadout } from "../../models/inventoryModels/loadoutModel.ts";
import { addMods, freeUpSlot, getInventory } from "../../services/inventoryService.ts";
import { getAccountForRequest } from "../../services/loginService.ts";
import { SRng } from "../../services/rngService.ts";
import type { IMongoDate, IOid } from "../../types/commonTypes.ts";
import type { IEquipmentClient } from "../../types/equipmentTypes.ts";
import type {
    IInnateDamageFingerprint,
    IInventoryClient,
    INemesisClient,
    IUpgradeClient,
    IWeaponSkinClient,
    TEquipmentKey,
    TNemesisFaction
} from "../../types/inventoryTypes/inventoryTypes.ts";
import { InventorySlot, LoadoutIndex } from "../../types/inventoryTypes/inventoryTypes.ts";
import { logger } from "../../utils/logger.ts";
import type { RequestHandler } from "express";
import { Types } from "mongoose";

export const nemesisController: RequestHandler = async (req, res) => {
    const account = await getAccountForRequest(req);
    if ((req.query.mode as string) == "f") {
        const body = getJSONfromString<IValenceFusionRequest>(String(req.body));
        const inventory = await getInventory(account._id.toString(), body.Category + " WeaponBin");
        const destWeapon = inventory[body.Category].id(body.DestWeapon.$oid)!;
        const sourceWeapon = inventory[body.Category].id(body.SourceWeapon.$oid)!;
        const destFingerprint = JSON.parse(destWeapon.UpgradeFingerprint!) as IInnateDamageFingerprint;
        const sourceFingerprint = JSON.parse(sourceWeapon.UpgradeFingerprint!) as IInnateDamageFingerprint;

        // Update destination damage type if desired
        if (body.UseSourceDmgType) {
            destFingerprint.buffs[0].Tag = sourceFingerprint.buffs[0].Tag;
        }

        // Upgrade destination damage value
        const destDamage = 0.25 + (destFingerprint.buffs[0].Value / 0x3fffffff) * (0.6 - 0.25);
        const sourceDamage = 0.25 + (sourceFingerprint.buffs[0].Value / 0x3fffffff) * (0.6 - 0.25);
        let newDamage = Math.max(destDamage, sourceDamage) * 1.1;
        if (newDamage >= 0.5794998) {
            newDamage = 0.6;
        }
        destFingerprint.buffs[0].Value = Math.trunc(((newDamage - 0.25) / (0.6 - 0.25)) * 0x3fffffff);

        // Commit fingerprint
        destWeapon.UpgradeFingerprint = JSON.stringify(destFingerprint);

        // Remove source weapon
        inventory[body.Category].pull({ _id: body.SourceWeapon.$oid });
        freeUpSlot(inventory, InventorySlot.WEAPONS);

        await inventory.save();
        res.json({
            InventoryChanges: {
                [body.Category]: [destWeapon.toJSON()],
                RemovedIdItems: [{ ItemId: body.SourceWeapon }]
            }
        });
    } else if ((req.query.mode as string) == "p") {
        const inventory = await getInventory(account._id.toString(), "Nemesis");
        const body = getJSONfromString<INemesisPrespawnCheckRequest>(String(req.body));
        const passcode = getNemesisPasscode(inventory.Nemesis!);
        let guessResult = 0;
        if (inventory.Nemesis!.Faction == "FC_INFESTATION") {
            for (let i = 0; i != 3; ++i) {
                if (body.guess[i] == passcode[0]) {
                    guessResult = 1 + i;
                    break;
                }
            }
        } else {
            for (let i = 0; i != 3; ++i) {
                if (body.guess[i] == passcode[i] || body.guess[i] == GUESS_WILDCARD) {
                    ++guessResult;
                }
            }
        }
        res.json({ GuessResult: guessResult });
    } else if (req.query.mode == "r") {
        const inventory = await getInventory(
            account._id.toString(),
            "Nemesis LoadOutPresets CurrentLoadOutIds DataKnives Upgrades RawUpgrades"
        );
        const body = getJSONfromString<INemesisRequiemRequest>(String(req.body));
        if (inventory.Nemesis!.Faction == "FC_INFESTATION") {
            const guess: number[] = [body.guess & 0xf, (body.guess >> 4) & 0xf, (body.guess >> 8) & 0xf];
            const passcode = getNemesisPasscode(inventory.Nemesis!)[0];
            const result1 = passcode == guess[0] ? GUESS_CORRECT : GUESS_INCORRECT;
            const result2 = passcode == guess[1] ? GUESS_CORRECT : GUESS_INCORRECT;
            const result3 = passcode == guess[2] ? GUESS_CORRECT : GUESS_INCORRECT;
            inventory.Nemesis!.GuessHistory.push(
                encodeNemesisGuess([
                    {
                        symbol: guess[0],
                        result: result1
                    },
                    {
                        symbol: guess[1],
                        result: result2
                    },
                    {
                        symbol: guess[2],
                        result: result3
                    }
                ])
            );

            // Increase antivirus if correct antivirus mod is installed
            const response: IKnifeResponse = {};
            if (result1 == GUESS_CORRECT || result2 == GUESS_CORRECT || result3 == GUESS_CORRECT) {
                let antivirusGain = 5;
                const loadout = (await Loadout.findById(inventory.LoadOutPresets, "DATAKNIFE"))!;
                const dataknifeLoadout = loadout.DATAKNIFE.id(
                    fromDbOid(inventory.CurrentLoadOutIds[LoadoutIndex.DATAKNIFE])
                );
                const dataknifeConfigIndex = dataknifeLoadout?.s?.mod ?? 0;
                const dataknifeUpgrades = inventory.DataKnives[0].Configs[dataknifeConfigIndex].Upgrades!;
                for (const upgrade of body.knife!.AttachedUpgrades) {
                    switch (upgrade.ItemType) {
                        case "/Lotus/Upgrades/Mods/DataSpike/Potency/GainAntivirusAndSpeedOnUseMod":
                        case "/Lotus/Upgrades/Mods/DataSpike/Potency/GainAntivirusAndWeaponDamageOnUseMod":
                        case "/Lotus/Upgrades/Mods/DataSpike/Potency/GainAntivirusSmallOnSingleUseMod":
                            antivirusGain += 10;
                            consumeModCharge(response, inventory, upgrade, dataknifeUpgrades);
                            break;
                        case "/Lotus/Upgrades/Mods/DataSpike/Potency/GainAntivirusLargeOnSingleUseMod": // Instant Secure
                        case "/Lotus/Upgrades/Mods/DataSpike/Potency/GainAntivirusOnUseMod": // Immuno Shield
                            antivirusGain += 15;
                            consumeModCharge(response, inventory, upgrade, dataknifeUpgrades);
                            break;
                    }
                }
                inventory.Nemesis!.HenchmenKilled += antivirusGain;
                if (inventory.Nemesis!.HenchmenKilled >= 100) {
                    inventory.Nemesis!.HenchmenKilled = 100;

                    // Weaken nemesis now.
                    inventory.Nemesis!.InfNodes = [
                        {
                            Node: getNemesisManifest(inventory.Nemesis!.manifest).showdownNode,
                            Influence: 1
                        }
                    ];
                    inventory.Nemesis!.Weakened = true;
                    const upgrade = getKnifeUpgrade(inventory, dataknifeUpgrades, antivirusMods[passcode]);
                    consumeModCharge(response, inventory, upgrade, dataknifeUpgrades);
                }
            }

            if (inventory.Nemesis!.HenchmenKilled < 100) {
                inventory.Nemesis!.InfNodes = getInfNodes(getNemesisManifest(inventory.Nemesis!.manifest), 0);
            }

            await inventory.save();
            res.json(response);
        } else {
            // For first guess, create a new entry.
            if (body.position == 0) {
                inventory.Nemesis!.GuessHistory.push(
                    encodeNemesisGuess([
                        {
                            symbol: GUESS_NONE,
                            result: GUESS_NEUTRAL
                        },
                        {
                            symbol: GUESS_NONE,
                            result: GUESS_NEUTRAL
                        },
                        {
                            symbol: GUESS_NONE,
                            result: GUESS_NEUTRAL
                        }
                    ])
                );
            }

            // Evaluate guess
            const correct =
                body.guess == GUESS_WILDCARD || getNemesisPasscode(inventory.Nemesis!)[body.position] == body.guess;

            // Update entry
            const guess = decodeNemesisGuess(
                inventory.Nemesis!.GuessHistory[inventory.Nemesis!.GuessHistory.length - 1]
            );
            guess[body.position].symbol = body.guess;
            guess[body.position].result = correct ? GUESS_CORRECT : GUESS_INCORRECT;
            inventory.Nemesis!.GuessHistory[inventory.Nemesis!.GuessHistory.length - 1] = encodeNemesisGuess(guess);

            const response: INemesisRequiemResponse = {};
            if (correct) {
                if (body.position == 2) {
                    // That was all 3 guesses correct, nemesis is now weakened.
                    inventory.Nemesis!.InfNodes = [
                        {
                            Node: getNemesisManifest(inventory.Nemesis!.manifest).showdownNode,
                            Influence: 1
                        }
                    ];
                    inventory.Nemesis!.Weakened = true;

                    // Subtract a charge from all requiem mods installed on parazon
                    const loadout = (await Loadout.findById(inventory.LoadOutPresets, "DATAKNIFE"))!;
                    const dataknifeLoadout = loadout.DATAKNIFE.id(
                        fromDbOid(inventory.CurrentLoadOutIds[LoadoutIndex.DATAKNIFE])
                    );
                    const dataknifeConfigIndex = dataknifeLoadout?.s?.mod ?? 0;
                    const dataknifeUpgrades = inventory.DataKnives[0].Configs[dataknifeConfigIndex].Upgrades!;
                    for (let i = 3; i != 6; ++i) {
                        //logger.debug(`subtracting a charge from ${dataknifeUpgrades[i]}`);
                        const upgrade = parseUpgrade(inventory, dataknifeUpgrades[i]);
                        consumeModCharge(response, inventory, upgrade, dataknifeUpgrades);
                    }
                }
            } else {
                // Guess was incorrect, increase rank
                response.RankIncrease = 1;
                const manifest = getNemesisManifest(inventory.Nemesis!.manifest);
                inventory.Nemesis!.Rank = Math.min(inventory.Nemesis!.Rank + 1, manifest.systemIndexes.length - 1);
                inventory.Nemesis!.InfNodes = getInfNodes(manifest, inventory.Nemesis!.Rank);
            }
            await inventory.save();
            res.json(response);
        }
    } else if ((req.query.mode as string) == "rs") {
        // report spawn; POST but no application data in body
        const inventory = await getInventory(account._id.toString(), "Nemesis");
        inventory.Nemesis!.LastEnc = inventory.Nemesis!.MissionCount;
        await inventory.save();
        res.json({ LastEnc: inventory.Nemesis!.LastEnc });
    } else if ((req.query.mode as string) == "s") {
        const inventory = await getInventory(account._id.toString(), "Nemesis");
        if (inventory.Nemesis) {
            logger.warn(`overwriting an existing nemesis as a new one is being requested`);
        }
        const body = getJSONfromString<INemesisStartRequest>(String(req.body));
        body.target.fp = BigInt(body.target.fp);

        const manifest = getNemesisManifest(body.target.manifest);
        if (account.BuildLabel && version_compare(account.BuildLabel, manifest.minBuild) < 0) {
            logger.warn(
                `client on version ${account.BuildLabel} provided nemesis manifest ${body.target.manifest} which was expected to require ${manifest.minBuild} or above. please file a bug report.`
            );
        }

        let weaponIdx = -1;
        if (body.target.Faction != "FC_INFESTATION") {
            const weapons: readonly string[] = manifest.weapons;
            const initialWeaponIdx = new SRng(body.target.fp).randomInt(0, weapons.length - 1);
            weaponIdx = initialWeaponIdx;
            if (body.target.DisallowedWeapons) {
                do {
                    const weapon = weapons[weaponIdx];
                    if (body.target.DisallowedWeapons.indexOf(weapon) == -1) {
                        break;
                    }
                    weaponIdx = (weaponIdx + 1) % weapons.length;
                } while (weaponIdx != initialWeaponIdx);
            }
        }

        inventory.Nemesis = {
            fp: body.target.fp,
            manifest: body.target.manifest,
            KillingSuit: body.target.KillingSuit,
            killingDamageType: body.target.killingDamageType,
            ShoulderHelmet: body.target.ShoulderHelmet,
            WeaponIdx: weaponIdx,
            AgentIdx: body.target.AgentIdx,
            BirthNode: body.target.BirthNode,
            Faction: body.target.Faction,
            Rank: 0,
            k: false,
            Traded: false,
            d: new Date(),
            InfNodes: getInfNodes(manifest, 0),
            GuessHistory: [],
            Hints: [],
            HintProgress: 0,
            Weakened: false,
            PrevOwners: 0,
            HenchmenKilled: 0,
            SecondInCommand: false,
            MissionCount: 0,
            LastEnc: 0
        };
        await inventory.save();

        res.json({
            target: inventory.toJSON().Nemesis
        });
    } else if ((req.query.mode as string) == "w") {
        const inventory = await getInventory(account._id.toString(), "Nemesis");
        //const body = getJSONfromString<INemesisWeakenRequest>(String(req.body));

        // As of 38.6.0, this request is no longer sent, instead mode=r already weakens the nemesis if appropriate.
        // We always weaken the nemesis in mode=r so simply giving the client back the nemesis.

        const response: INemesisWeakenResponse = {
            target: inventory.toJSON<IInventoryClient>().Nemesis!
        };
        res.json(response);
    } else {
        logger.debug(`data provided to ${req.path}: ${String(req.body)}`);
        throw new Error(`unknown nemesis mode: ${String(req.query.mode)}`);
    }
};

interface IValenceFusionRequest {
    DestWeapon: IOid;
    SourceWeapon: IOid;
    Category: TEquipmentKey;
    UseSourceDmgType: boolean;
}

interface INemesisStartRequest {
    target: {
        fp: number | bigint;
        manifest: string;
        KillingSuit: string;
        killingDamageType: number;
        ShoulderHelmet: string;
        DisallowedWeapons?: string[];
        WeaponIdx: number;
        AgentIdx: number;
        BirthNode: string;
        Faction: TNemesisFaction;
        Rank: number;
        k: boolean;
        Traded: boolean;
        d: IMongoDate;
        InfNodes: [];
        GuessHistory: [];
        Hints: [];
        HintProgress: number;
        Weakened: boolean;
        PrevOwners: number;
        HenchmenKilled: number;
        MissionCount?: number; // Added in 38.5.0
        LastEnc?: number; // Added in 38.5.0
        SecondInCommand: boolean;
    };
}

interface INemesisPrespawnCheckRequest {
    guess: number[]; // .length == 3
    potency?: number[];
}

interface INemesisRequiemRequest {
    guess: number; // grn/crp: 4 bits | coda: 3x 4 bits
    position: number; // grn/crp: 0-2 | coda: 0
    // knife field provided for coda only
    knife?: IKnife;
}

interface INemesisRequiemResponse extends IKnifeResponse {
    RankIncrease?: number;
}

// interface INemesisWeakenRequest {
//     target: INemesisClient;
//     knife: IKnife;
// }

interface INemesisWeakenResponse extends IKnifeResponse {
    target: INemesisClient;
}

interface IKnife {
    Item: IEquipmentClient;
    Skins: IWeaponSkinClient[];
    ModSlot: number;
    CustSlot: number;
    AttachedUpgrades: IUpgradeClient[];
    HiddenWhenHolstered: boolean;
}

const consumeModCharge = (
    response: IKnifeResponse,
    inventory: TInventoryDatabaseDocument,
    upgrade: { ItemId: IOid; ItemType: string },
    dataknifeUpgrades: string[]
): void => {
    response.UpgradeIds ??= [];
    response.UpgradeTypes ??= [];
    response.UpgradeFingerprints ??= [];
    response.UpgradeNew ??= [];
    response.HasKnife = true;

    if (upgrade.ItemId.$oid != "000000000000000000000000") {
        const dbUpgrade = inventory.Upgrades.id(upgrade.ItemId.$oid)!;
        const fingerprint = JSON.parse(dbUpgrade.UpgradeFingerprint!) as { lvl: number };
        fingerprint.lvl += 1;
        dbUpgrade.UpgradeFingerprint = JSON.stringify(fingerprint);

        response.UpgradeIds.push(upgrade.ItemId.$oid);
        response.UpgradeTypes.push(upgrade.ItemType);
        response.UpgradeFingerprints.push(fingerprint);
        response.UpgradeNew.push(false);
    } else {
        const id = new Types.ObjectId();
        inventory.Upgrades.push({
            _id: id,
            ItemType: upgrade.ItemType,
            UpgradeFingerprint: `{"lvl":1}`
        });

        addMods(inventory, [
            {
                ItemType: upgrade.ItemType,
                ItemCount: -1
            }
        ]);

        const dataknifeRawUpgradeIndex = dataknifeUpgrades.indexOf(upgrade.ItemType);
        if (dataknifeRawUpgradeIndex != -1) {
            dataknifeUpgrades[dataknifeRawUpgradeIndex] = id.toString();
        } else {
            logger.warn(`${upgrade.ItemType} not found in dataknife config`);
        }

        response.UpgradeIds.push(id.toString());
        response.UpgradeTypes.push(upgrade.ItemType);
        response.UpgradeFingerprints.push({ lvl: 1 });
        response.UpgradeNew.push(true);
    }
};