elysium/apps/api/src/routes/prestige.ts

/**
 * @file Prestige routes handling prestige resets and upgrade purchases.
 * @copyright nhcarrigan
 * @license Naomi's Public License
 * @author Naomi Carrigan
 */
/* eslint-disable max-lines-per-function -- Route handlers require many steps */
/* eslint-disable max-statements -- Route handlers require many statements */
/* eslint-disable complexity -- Route handlers have inherent complexity */
import { Hono } from "hono";
import { defaultPrestigeUpgrades } from "../data/prestigeUpgrades.js";
import { prisma } from "../db/client.js";
import { authMiddleware } from "../middleware/auth.js";
import { updateChallengeProgress } from "../services/dailyChallenges.js";
import { logger } from "../services/logger.js";
import {
  buildPostPrestigeState,
  computeRunestoneMultipliers,
  isEligibleForPrestige,
} from "../services/prestige.js";
import { postMilestoneWebhook } from "../services/webhook.js";
import type { HonoEnvironment } from "../types/hono.js";
import type { BuyPrestigeUpgradeRequest, GameState } from "@elysium/types";

const prestigeRouter = new Hono<HonoEnvironment>();

prestigeRouter.use("*", authMiddleware);

prestigeRouter.post("/", async(context) => {
  try {
    const discordId = context.get("discordId");

    const record = await prisma.gameState.findUnique({ where: { discordId } });

    if (!record) {
      return context.json({ error: "No save found" }, 404);
    }

    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
    const state = record.state as unknown as GameState;

    if (!isEligibleForPrestige(state)) {
      return context.json(
        {
          // eslint-disable-next-line stylistic/max-len -- Error message cannot be shortened
          error: "Not eligible for prestige — collect 1,000,000 total gold first",
        },
        400,
      );
    }

    // Update daily prestige challenge progress before resetting the run
    let updatedDailyChallenges = state.dailyChallenges;
    let challengeCrystals = 0;
    if (updatedDailyChallenges) {
      const result = updateChallengeProgress(
        updatedDailyChallenges,
        "prestige",
        1,
      );
      updatedDailyChallenges = result.updatedChallenges;
      challengeCrystals = result.crystalsAwarded;
    }

    const {
      milestoneRunestones,
      prestigeData,
      prestigeState,
      runestonesEarned,
    } = buildPostPrestigeState(state, state.player.characterName);

    // Preserve daily challenges across the prestige reset and apply any crystal rewards
    const finalState: GameState = {
      ...prestigeState,
      ...updatedDailyChallenges === undefined
        ? {}
        : { dailyChallenges: updatedDailyChallenges },
      resources: {
        ...prestigeState.resources,
        crystals: prestigeState.resources.crystals + challengeCrystals,
      },
    };

    // Capture current-run stats to accumulate into lifetime totals before resetting
    // eslint-disable-next-line capitalized-comments -- v8 ignore
    /* v8 ignore next 10 -- @preserve */
    const runBossesDefeated = state.bosses.filter((boss) => {
      return boss.status === "defeated";
    }).length;
    const runQuestsCompleted = state.quests.filter((quest) => {
      return quest.status === "completed";
    }).length;
    let runAdventurersRecruited = 0;
    for (const adventurer of state.adventurers) {
      runAdventurersRecruited = runAdventurersRecruited + adventurer.count;
    }

    // eslint-disable-next-line capitalized-comments -- v8 ignore
    /* v8 ignore next 3 -- @preserve */
    const runAchievementsUnlocked = state.achievements.filter((achievement) => {
      return achievement.unlockedAt !== null;
    }).length;

    const now = Date.now();
    const { updatedAt } = record;

    /*
     * Use the record's current updatedAt as an optimistic lock — if another
     * concurrent prestige request already committed, this update will match
     * 0 rows and we can safely reject the duplicate without a double webhook.
     */
    const updateResult = await prisma.gameState.updateMany({
      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
      data:  { state: finalState as object, updatedAt: now },
      where: { discordId, updatedAt },
    });

    if (updateResult.count === 0) {
      return context.json({ error: "Prestige already in progress" }, 409);
    }

    await prisma.player.update({
      data: {
        characterName: state.player.characterName,

        lastSavedAt: now,

        lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },

        lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },

        lifetimeBossesDefeated: { increment: runBossesDefeated },

        lifetimeClicks: { increment: state.player.totalClicks },

        // Accumulate into lifetime totals — never reset
        lifetimeGoldEarned: { increment: state.player.totalGoldEarned },

        lifetimeQuestsCompleted: { increment: runQuestsCompleted },

        totalClicks:     0,
        // Reset current-run counters
        totalGoldEarned: 0,
      },
      where: { discordId },
    });

    const prestigeCount = prestigeData.count;
    void logger.metric("prestige", 1, { discordId, prestigeCount });
    void postMilestoneWebhook(discordId, "prestige", {
      // eslint-disable-next-line capitalized-comments -- v8 ignore
      /* v8 ignore next -- @preserve */
      apotheosis: prestigeState.apotheosis?.count ?? 0,

      prestige: prestigeData.count,

      // eslint-disable-next-line capitalized-comments -- v8 ignore
      /* v8 ignore next 2 -- @preserve */
      transcendence: prestigeState.transcendence?.count ?? 0,
    });

    return context.json({
      milestoneRunestones: milestoneRunestones,
      newPrestigeCount:    prestigeData.count, // eslint-disable-line unicorn/no-keyword-prefix -- API response field name required by client
      runestones:          runestonesEarned,
    });
  } catch (error) {
    void logger.error(
      "prestige",
      error instanceof Error
        ? error
        : new Error(String(error)),
    );
    return context.json({ error: "Internal server error" }, 500);
  }
});

prestigeRouter.post("/buy-upgrade", async(context) => {
  try {
    const discordId = context.get("discordId");
    const body = await context.req.json<BuyPrestigeUpgradeRequest>();

    const { upgradeId } = body;
    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
    if (!upgradeId) {
      return context.json({ error: "upgradeId is required" }, 400);
    }

    const upgrade = defaultPrestigeUpgrades.find((prestigeUpgrade) => {
      return prestigeUpgrade.id === upgradeId;
    });
    if (!upgrade) {
      return context.json({ error: "Unknown prestige upgrade" }, 404);
    }

    const record = await prisma.gameState.findUnique({ where: { discordId } });
    if (!record) {
      return context.json({ error: "No save found" }, 404);
    }

    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
    const state = record.state as unknown as GameState;
    const { purchasedUpgradeIds, runestones } = state.prestige;

    if (purchasedUpgradeIds.includes(upgradeId)) {
      return context.json({ error: "Upgrade already purchased" }, 400);
    }

    if (runestones < upgrade.runestonesCost) {
      return context.json({ error: "Not enough runestones" }, 400);
    }

    const updatedRunestones = runestones - upgrade.runestonesCost;
    const updatedPurchasedUpgradeIds = [ ...purchasedUpgradeIds, upgradeId ];

    const updatedState: GameState = {
      ...state,
      prestige: {
        ...state.prestige,
        purchasedUpgradeIds: updatedPurchasedUpgradeIds,
        runestones:          updatedRunestones,
        ...computeRunestoneMultipliers(updatedPurchasedUpgradeIds),
      },
    };

    await prisma.gameState.update({
      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
      data:  { state: updatedState as object, updatedAt: Date.now() },
      where: { discordId },
    });

    const multipliers = computeRunestoneMultipliers(updatedPurchasedUpgradeIds);

    void logger.metric("prestige_upgrade_purchased", 1, {
      discordId,
      upgradeId,
    });
    return context.json({
      purchasedUpgradeIds: updatedPurchasedUpgradeIds,
      runestonesRemaining: updatedRunestones,
      ...multipliers,
    });
  } catch (error) {
    void logger.error(
      "prestige_buy_upgrade",
      error instanceof Error
        ? error
        : new Error(String(error)),
    );
    return context.json({ error: "Internal server error" }, 500);
  }
});

export { prestigeRouter };