import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";

/**
 * Ürün (marka/varyant, Bölüm 6.11): "Ariel Matik 5 kg / 50 yıkama". Bir ürün tipine bağlıdır;
 * fiyatlar (Faz 12b) bu seviyede tutulur. Paket miktarı binde bir. `typeQuantity`: paket birimi
 * ürün tipinin birimine kendiliğinden çevrilemiyorsa bir paketin ürün tipi birimindeki karşılığı
 * (zorunlu); çevrilebiliyorsa null. Görseller `attachments` (ownerType "product").
 */
const productSchema = new Schema(
  {
    householdId: { type: Schema.Types.ObjectId, required: true },
    productTypeId: { type: Schema.Types.ObjectId, required: true },
    brand: { type: String, required: true, trim: true, maxlength: 60 },
    /** Tanım (ör. "Matik Dağ Esintisi"). */
    name: { type: String, default: "", trim: true, maxlength: 120 },
    /** Arama anahtarı: marka + tanım (Türkçe katlanmış). */
    searchKey: { type: String, required: true },
    barcode: { type: String, default: null },
    packageQuantity: { type: Number, required: true, min: 1 },
    packageUnit: { type: String, required: true, trim: true, maxlength: 20 },
    typeQuantity: { type: Number, default: null, min: 1 },
    note: { type: String, default: "", maxlength: 300 },
    imageCount: { type: Number, default: 0 },
    archivedAt: { type: Date, default: null },
    seedRef: { type: String, default: null },
    createdBy: { type: Schema.Types.ObjectId, required: true },
    updatedBy: { type: Schema.Types.ObjectId, required: true },
  },
  { timestamps: true, collection: "products" },
);

productSchema.index({ householdId: 1, productTypeId: 1, archivedAt: 1 });
productSchema.index(
  { householdId: 1, barcode: 1 },
  { partialFilterExpression: { barcode: { $type: "string" } } },
);
productSchema.index(
  { householdId: 1, seedRef: 1 },
  { unique: true, partialFilterExpression: { seedRef: { $type: "string" } } },
);

export type Product = InferSchemaType<typeof productSchema>;

export const ProductModel: Model<Product> =
  (models.Product as Model<Product> | undefined) ?? model<Product>("Product", productSchema);