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,
  autoPrice,
  autoQuantity,
  expireListing,
} from "@/lib/market";
import { applyNpcPriceModifier, resolveVendorNpc } from "@/lib/market/npcs";
import { expireNegotiationsForListing } from "@/lib/market/negotiations";
import { resolveAssetId } from "@/lib/locker";
import { getMainCurrencyId } from "@/lib/banking";

export const script = async (config: SanitizedConfig) => {
  const payload = await getPayload({ config });

  payload.logger.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) {
      const message = error instanceof Error ? error.message : "Unknown error";
      payload.logger.error(`[Market Tick] Error expiring listing ${listing.id}: ${message}`);
    }
  }

  // 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 = autoPrice(asset, "buy");
    if (basePrice == null) continue;

    // 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(basePrice, npc);
    if (price <= 0) continue;

    const quantity = 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) {
      const message = error instanceof Error ? error.message : "Unknown error";
      payload.logger.error(`[Market Tick] Error generating listing for asset ${asset.id}: ${message}`);
    }
  }

  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) => {
      const message = error instanceof Error ? error.message : "Unknown error";
      payload.logger.error(`[Market Tick] Failed to notify app clients: ${message}`);
    });
  }

  payload.logger.info(
    `[Market Tick] Complete. Expired ${expiredCount}, generated ${generatedCount}.`,
  );
  process.exit(0);
};