import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
import { TRANSACTION_TYPES } from "@/shared/transactions";

/** Satıcı / karşı taraf ve "akıllı giriş" kuralı: son kullanılan kategori ve hesap (Bölüm 6.3). */
const payeeSchema = new Schema(
  {
    householdId: { type: Schema.Types.ObjectId, required: true },
    name: { type: String, required: true, trim: true, maxlength: 80 },
    nameKey: { type: String, required: true },
    lastType: { type: String, enum: TRANSACTION_TYPES, default: "expense" },
    lastCategoryId: { type: Schema.Types.ObjectId, default: null },
    lastAccountId: { type: Schema.Types.ObjectId, default: null },
    useCount: { type: Number, default: 0 },
    lastUsedAt: { type: Date, default: () => new Date() },
  },
  { timestamps: true, collection: "payees" },
);

payeeSchema.index({ householdId: 1, nameKey: 1 }, { unique: true });
payeeSchema.index({ householdId: 1, useCount: -1 });

export type Payee = InferSchemaType<typeof payeeSchema>;

export const PayeeModel: Model<Payee> =
  (models.Payee as Model<Payee> | undefined) ?? model<Payee>("Payee", payeeSchema);