import type { SanitizedConfig } from "payload";
import { getPayload } from "payload";
import type { Asset, MarketListing } from "@/payload-types";
import { emitGameEvent } from "@/utils/event-log/emit";
import { EventTypes } from "@/utils/event-log/eventTypes";
import { AUTO_LISTING_DURATION_MS, autoQuantity, expireListing, getBaseBuyPrice } from "@/lib/market";
import { applyNpcPriceModifier, resolveVendorNpc } from "@/lib/market/npcs";
import { expireNegotiationsForListing } from "@/lib/market/negotiations";
import { getMarketPriceContext } from "@/lib/economy/consumption";
import { scaleQuantityForShortage } from "@/lib/economy/math";
import { resolveAssetId } from "@/lib/locker";
import { getMainCurrencyId } from "@/lib/banking";
import { createBinLogger, errorMessage } from "./lib/binFileLogger";

export const script = async (config: SanitizedConfig) => {
  const payload = await getPayload({ config });
  const log = createBinLogger("market-tick", payload.logger);

  try {
    log.info("[Market Tick] Starting market tick...");

    const now = new Date();
    const nowIso = now.toISOString();

    // 1. Expire overdue listings (returns stock to sellers for user listings).
    const expiring = await payload.find({
      collection: "market-listings",
      where: {
        and: [{ status: { equals: "active" } }, { expiresAt: { less_than_equal: nowIso } }],
      },
      limit: 200,
      depth: 1,
      sort: "expiresAt",
    });

    let expiredCount = 0;
    let expiredUserCount = 0;
    for (const listing of expiring.docs) {
      const sellerId =
        typeof listing.seller === "object" && listing.seller
          ? (listing.seller as { id: number }).id
          : (listing.seller as number | null);
      const isUserListing = sellerId != null && !listing.isAutoGenerated;
      try {
        await expireListing(payload, listing as unknown as MarketListing);
        expiredCount++;
        if (isUserListing) expiredUserCount++;
        const assetName =
          typeof listing.asset === "object" && listing.asset
            ? listing.asset.name
            : `asset #${resolveAssetId(listing.asset)}`;
        await expireNegotiationsForListing(payload, listing.id, assetName, {
          reason: "expired before you could close the deal",
        });
        await emitGameEvent(payload, {
          type: EventTypes.MarketListingExpire,
          message: `Listing for ${listing.quantity}× ${assetName} expired${
            isUserListing ? ", stock returned to seller" : ""
          }`,
          actor: sellerId ?? undefined,
          targetCollection: "market-listings",
          targetId: listing.id,
          data: {
            assetId: listing.asset,
            assetName,
            quantity: listing.quantity,
            autoGenerated: listing.isAutoGenerated,
          },
        });
      } catch (error) {
        log.error(`[Market Tick] Error expiring listing ${listing.id}: ${errorMessage(error)}`);
      }
    }

    // 2. Top up auto-generated entries for tradeable live assets with no active listing.
    const active = await payload.find({
      collection: "market-listings",
      where: { status: { equals: "active" } },
      limit: 2000,
      depth: 0,
    });
    const activeAssetIds = new Set(active.docs.map((d) => resolveAssetId(d.asset)));

    const assets = await payload.find({
      collection: "assets",
      where: {
        and: [{ tradeable: { equals: true } }, { isLive: { equals: true } }],
      },
      limit: 2000,
      depth: 0,
      sort: "name",
    });

    const currencyId = await getMainCurrencyId(payload);
    let generatedCount = 0;
    let generatedNpcCount = 0;
    for (const asset of assets.docs as unknown as Asset[]) {
      if (activeAssetIds.has(asset.id)) continue;
      const basePrice = getBaseBuyPrice(asset);
      if (basePrice == null) continue;

      // Supply/demand modifier from the economy ledger (neutral 1 when the
      // item has no market-state doc yet), then the vendor's own modifier.
      const priceCtx = await getMarketPriceContext(payload, "asset", asset.id);
      const modifiedPrice = Math.max(1, Math.round(basePrice * (priceCtx?.priceModifier ?? 1)));

      // Assign an NPC to stock this entry: prefer GM-assigned vendor NPCs,
      // fall back to generating a placeholder NPC when none sell this good.
      const npc = await resolveVendorNpc(payload, asset.id);
      if (npc.isGenerated === true) generatedNpcCount++;
      const price = applyNpcPriceModifier(modifiedPrice, npc);
      if (price <= 0) continue;

      // Vendors restock less under shortage; bounded so they never stock zero.
      const demand = priceCtx ? priceCtx.artificialDemand + priceCtx.realDemand : 0;
      const quantity = priceCtx
        ? scaleQuantityForShortage(autoQuantity(asset), priceCtx.currentSupply, demand)
        : autoQuantity(asset);
      const expiresAt = new Date(Date.now() + AUTO_LISTING_DURATION_MS).toISOString();
      const minPrice = Math.max(1, Math.round(price * 0.6));
      try {
        await payload.create({
          collection: "market-listings",
          data: {
            asset: asset.id,
            seller: null,
            npc: npc.id,
            quantity,
            price,
            desiredPrice: price,
            minPrice,
            currency: currencyId ?? null,
            status: "active",
            isAutoGenerated: true,
            listedAt: nowIso,
            expiresAt,
          },
          overrideAccess: true,
          depth: 0,
        });
        generatedCount++;
      } catch (error) {
        log.error(
          `[Market Tick] Error generating listing for asset ${asset.id}: ${errorMessage(error)}`,
        );
      }
    }

    await emitGameEvent(payload, {
      type: EventTypes.MarketAutoGenerate,
      message: `Market tick: expired ${expiredCount} listing(s), generated ${generatedCount} new market entry/entries${generatedNpcCount > 0 ? ` (${generatedNpcCount} new NPC${generatedNpcCount !== 1 ? "s" : ""} generated)` : ""}`,
      data: {
        expiredCount,
        generatedCount,
        generatedNpcCount,
        activeListings: active.docs.length,
      },
    });

    // 3. Notify connected clients so the market refreshes.
    const notifyUrl = (process.env.APP_URL ?? "http://localhost:3000").replace(/\/$/, "");
    const notifySecret = process.env.GAME_TICK_NOTIFY_SECRET;
    if (notifySecret) {
      await fetch(`${notifyUrl}/api/game-tick/notify`, {
        method: "POST",
        headers: {
          "content-type": "application/json",
          "x-game-tick-secret": notifySecret,
        },
        body: JSON.stringify({ processedAt: nowIso, source: "market-tick" }),
      }).catch((error: unknown) => {
        log.error(`[Market Tick] Failed to notify app clients: ${errorMessage(error)}`);
      });
    }

    log.info(`[Market Tick] Complete. Expired ${expiredCount}, generated ${generatedCount}.`);
    process.exit(0);
  } catch (error) {
    log.error(
      `[Market Tick] Fatal: ${error instanceof Error ? (error.stack ?? error.message) : String(error)}`,
    );
    process.exit(1);
  }
};