import mongoose from "mongoose";

const ProductSchema = new mongoose.Schema({
  storeId: {
    type: mongoose.Schema.Types.ObjectId,
    ref: "Store",
    required: true,
  },
  category: { 
    type: mongoose.Schema.Types.ObjectId, 
    required: true,
    ref: "Store.categories"
  },

  name: { type: String, required: true },
  description: { type: String },

  unitType: {
    type: String,
    enum: ["pcs", "gr", "kg"],
    required: true,
  },

  // Add inventory tracking fields
  stockTracking: { type: Boolean, default: true },
  currentStock: { 
    type: Number, 
    default: 0,
    validate: {
      validator: function(value) {
        return !this.stockTracking || value >= 0;
      },
      message: "Stock cannot be negative"
    } 
  },
  lowStockThreshold: { type: Number, default: 10 },
  stockStatus: { 
    type: String,
    enum: ["in_stock", "low_stock", "out_of_stock"],
    default: "out_of_stock"
  },

  pricing: [
    {
      minQuantity: { 
        type: Number, 
        required: true,
        validate: {
          validator: function(value) {
            if (this.parent().unitType === "gr") {
              return value >= 0.1;
            }
            return value >= 1;
          },
          message: "Invalid minQuantity for unitType"
        }
      },
      pricePerUnit: { 
        type: Number, 
        required: true, 
        min: 0.01 
      },
    },
  ],

  image: { type: String },
});

export default mongoose.model("Product", ProductSchema);