feat: enhance purchase intentions with chat integration and offer tracking

- Added MongoDB chat/message integration for seller responses
- Improved seller response validation and default messaging
- Integrated automatic chat creation/update when responding to intentions
- Added highest custom offer fields to listing queries and models
- Enhanced listing data with top offer information for buyers

lib/prisma/queries/purchase-intentions.ts

@@ -3,6 +3,7 @@
  */
 
 import { prisma } from "../app";
+import { Prisma } from "@prisma/client";
 
 export type PurchaseIntentionStatus = "pending" | "accepted" | "rejected" | "expired" | "completed";
 export type PaymentMethod = "pix" | "tibia_coins" | "gold_coins" | "trade";
@@ -13,6 +14,8 @@ export interface CreatePurchaseIntentionData {
   payment_method: PaymentMethod;
   buyer_message?: string;
   expires_at?: Date;
+  custom_offer_amount?: number | null;
+  custom_offer_currency?: PaymentMethod | null;
 }
 
 export interface PurchaseIntention {
@@ -21,6 +24,9 @@ export interface PurchaseIntention {
   buyer_id: number;
   payment_method: string;
   payment_method_change_count: number;
+  custom_offer_amount: number | null;
+  custom_offer_currency: string | null;
+  custom_offer_created_at: Date | null;
   status: PurchaseIntentionStatus;
   buyer_message: string | null;
   seller_response: string | null;
@@ -42,13 +48,27 @@ export interface PurchaseIntention {
   };
 }
 
+function serializePurchaseIntention(intention: any): PurchaseIntention {
+  if (!intention) return intention;
+
+  return {
+    ...intention,
+    custom_offer_amount:
+      intention.custom_offer_amount !== null && intention.custom_offer_amount !== undefined
+        ? Number(intention.custom_offer_amount)
+        : null,
+    custom_offer_currency: intention.custom_offer_currency ?? null,
+    custom_offer_created_at: intention.custom_offer_created_at ?? null,
+  };
+}
+
 /**
  * Cria uma nova intenção de compra
  */
 export async function createPurchaseIntention(
   data: CreatePurchaseIntentionData
 ): Promise<PurchaseIntention> {
-  return await prisma.purchaseIntention.create({
+  const result = await prisma.purchaseIntention.create({
     data: {
       listing_id: data.listing_id,
       buyer_id: data.buyer_id,
@@ -56,6 +76,15 @@ export async function createPurchaseIntention(
       buyer_message: data.buyer_message || null,
       expires_at: data.expires_at || null,
       status: "pending",
+      custom_offer_amount:
+        data.custom_offer_amount !== undefined && data.custom_offer_amount !== null
+          ? new Prisma.Decimal(data.custom_offer_amount)
+          : null,
+      custom_offer_currency: data.custom_offer_currency || null,
+      custom_offer_created_at:
+        data.custom_offer_amount !== undefined && data.custom_offer_amount !== null
+          ? new Date()
+          : null,
     },
     include: {
       listing: {
@@ -73,7 +102,9 @@ export async function createPurchaseIntention(
         },
       },
     },
-  }) as PurchaseIntention;
+  });
+
+  return serializePurchaseIntention(result);
 }
 
 /**
@@ -90,7 +121,7 @@ export async function getPurchaseIntentionsByListing(
     where.status = status;
   }
 
-  return await prisma.purchaseIntention.findMany({
+  const intentions = await prisma.purchaseIntention.findMany({
     where,
     include: {
       listing: {
@@ -110,7 +141,9 @@ export async function getPurchaseIntentionsByListing(
     },
     orderBy: { created_at: "desc" },
     take: limit,
-  }) as PurchaseIntention[];
+  });
+
+  return intentions.map(serializePurchaseIntention);
 }
 
 /**
@@ -127,7 +160,7 @@ export async function getPurchaseIntentionsByBuyer(
     where.status = status;
   }
 
-  return await prisma.purchaseIntention.findMany({
+  const intentions = await prisma.purchaseIntention.findMany({
     where,
     include: {
       listing: {
@@ -147,7 +180,9 @@ export async function getPurchaseIntentionsByBuyer(
     },
     orderBy: { created_at: "desc" },
     take: limit,
-  }) as PurchaseIntention[];
+  });
+
+  return intentions.map(serializePurchaseIntention);
 }
 
 /**
@@ -156,7 +191,7 @@ export async function getPurchaseIntentionsByBuyer(
 export async function getPurchaseIntentionById(
   intentionId: number
 ): Promise<PurchaseIntention | null> {
-  return await prisma.purchaseIntention.findUnique({
+  const intention = await prisma.purchaseIntention.findUnique({
     where: { intention_id: intentionId },
     include: {
       listing: {
@@ -174,7 +209,9 @@ export async function getPurchaseIntentionById(
         },
       },
     },
-  }) as PurchaseIntention | null;
+  });
+
+  return serializePurchaseIntention(intention);
 }
 
 /**
@@ -200,7 +237,7 @@ export async function updatePurchaseIntentionStatus(
     updateData.seller_response = sellerResponse;
   }
 
-  return await prisma.purchaseIntention.update({
+  const updated = await prisma.purchaseIntention.update({
     where: { intention_id: intentionId },
     data: updateData,
     include: {
@@ -219,7 +256,9 @@ export async function updatePurchaseIntentionStatus(
         },
       },
     },
-  }) as PurchaseIntention;
+  });
+
+  return serializePurchaseIntention(updated);
 }
 
 /**
@@ -259,7 +298,7 @@ export async function getPendingIntentionByBuyerAndListing(
   listingId: number,
   buyerId: number
 ): Promise<PurchaseIntention | null> {
-  return await prisma.purchaseIntention.findFirst({
+  const intention = await prisma.purchaseIntention.findFirst({
     where: {
       listing_id: listingId,
       buyer_id: buyerId,
@@ -284,7 +323,9 @@ export async function getPendingIntentionByBuyerAndListing(
     orderBy: {
       created_at: "desc",
     },
-  }) as PurchaseIntention | null;
+  });
+
+  return serializePurchaseIntention(intention);
 }
 
 /**
@@ -314,7 +355,7 @@ export async function updatePurchaseIntentionPaymentMethod(
   }
 
   // Atualizar
-  return await prisma.purchaseIntention.update({
+  const updated = await prisma.purchaseIntention.update({
     where: { intention_id: intentionId },
     data: {
       payment_method: newPaymentMethod,
@@ -337,7 +378,9 @@ export async function updatePurchaseIntentionPaymentMethod(
         },
       },
     },
-  }) as PurchaseIntention;
+  });
+
+  return serializePurchaseIntention(updated);
 }
 
 /**
@@ -372,3 +415,68 @@ export async function getPendingIntentionListingIdsForBuyer(
   return Array.from(uniqueIds);
 }
 
+export async function getHighestCustomOfferForListing(
+  listingId: number
+): Promise<{ amount: number; currency: string } | null> {
+  const offer = await prisma.purchaseIntention.findFirst({
+    where: {
+      listing_id: listingId,
+      status: { in: ["pending", "accepted"] },
+      custom_offer_amount: { not: null },
+      custom_offer_currency: { not: null },
+    },
+    orderBy: { custom_offer_amount: "desc" },
+    select: {
+      custom_offer_amount: true,
+      custom_offer_currency: true,
+    },
+  });
+
+  if (!offer) {
+    return null;
+  }
+
+  return {
+    amount: Number(offer.custom_offer_amount),
+    currency: offer.custom_offer_currency!,
+  };
+}
+
+export async function getHighestCustomOffersForListings(
+  listingIds: number[]
+): Promise<Map<number, { amount: number; currency: string }>> {
+  if (listingIds.length === 0) {
+    return new Map();
+  }
+
+  const offers = await prisma.purchaseIntention.findMany({
+    where: {
+      listing_id: { in: listingIds },
+      status: { in: ["pending", "accepted"] },
+      custom_offer_amount: { not: null },
+      custom_offer_currency: { not: null },
+    },
+    select: {
+      listing_id: true,
+      custom_offer_amount: true,
+      custom_offer_currency: true,
+    },
+    orderBy: [
+      { listing_id: "asc" },
+      { custom_offer_amount: "desc" },
+    ],
+  });
+
+  const result = new Map<number, { amount: number; currency: string }>();
+  for (const offer of offers) {
+    if (!result.has(offer.listing_id)) {
+      result.set(offer.listing_id, {
+        amount: Number(offer.custom_offer_amount),
+        currency: offer.custom_offer_currency!,
+      });
+    }
+  }
+
+  return result;
+}
+