import mongoose, { Document, Schema } from 'mongoose';

export interface IProduct extends Document {
  title: string;
  description: string;
  price: number;
  costOfGoods: number;
  printingCost: number;
  sku: string;
  category: string;
  tags: string[];
  aliases: string[];
  images: string[];
  variants: {
    name: string;
    options: string[];
    price?: number;
    sku?: string;
  }[];
  inventory: {
    quantity: number;
    lowStockAlert: number;
    location?: string;
  };
  dimensions: {
    length?: number;
    width?: number;
    height?: number;
    weight?: number;
  };
  materials: string[];
  isActive: boolean;
  etsyListingId?: string;
  userId: mongoose.Types.ObjectId;
  dateCreated: Date;
  dateUpdated: Date;
}

const ProductSchema: Schema = new Schema({
  title: { type: String, required: true, trim: true },
  description: { type: String, default: '' },
  price: { type: Number, required: true, min: 0 },
  costOfGoods: { type: Number, default: 0, min: 0 },
  printingCost: { type: Number, default: 0, min: 0 },
  sku: { type: String, trim: true, default: '' },
  category: { type: String, default: 'Other' },
  tags: [{ type: String, trim: true }],
  // Packing-slip item titles previously matched to this product; used for
  // deterministic matching on future imports
  aliases: [{ type: String, trim: true }],
  images: [{ type: String }],
  variants: [{
    name: { type: String, required: true },
    options: [{ type: String, required: true }],
    price: { type: Number, min: 0 },
    sku: { type: String }
  }],
  inventory: {
    quantity: { type: Number, required: true, min: 0 },
    lowStockAlert: { type: Number, default: 5 },
    location: { type: String }
  },
  dimensions: {
    length: { type: Number, min: 0 },
    width: { type: Number, min: 0 },
    height: { type: Number, min: 0 },
    weight: { type: Number, min: 0 }
  },
  materials: [{ type: String }],
  isActive: { type: Boolean, default: true },
  etsyListingId: { type: String },
  userId: { type: Schema.Types.ObjectId, ref: 'User', required: true, index: true },
  dateCreated: { type: Date, default: Date.now },
  dateUpdated: { type: Date, default: Date.now }
});

// Update dateUpdated on save
ProductSchema.pre('save', function(next) {
  this.dateUpdated = new Date();
  next();
});

export default mongoose.model<IProduct>('Product', ProductSchema);