const mongoose = require('mongoose')
const mongoosePaginate = require('mongoose-paginate-v2')
const timestamp = require('mongoose-timestamp')

const variantSnapshotSchema = new mongoose.Schema({
  color: { type: String, default: null },
  size: { type: String, default: null },
  weight: { type: String, default: null },
  price: { type: Number, required: true }
}, { _id: false })

const buyerAddressSnapshotSchema = new mongoose.Schema({
  first_name: { type: String, default: null },
  last_name: { type: String, default: null },
  mobile: { type: String, default: null },
  address: { type: String, default: null },
  province: { type: Object, default: null },
  city: { type: Object, default: null },
  lat: { type: String, default: null },
  lng: { type: String, default: null }
}, { _id: false })

const orderSchema = new mongoose.Schema({
  buyer: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true
  },
  shop: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Shop',
    required: true,
    index: true
  },
  listing: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'ShopProductListing',
    required: true
  },
  variantId: {
    type: mongoose.Schema.Types.ObjectId,
    required: true
  },
  variantSnapshot: {
    type: variantSnapshotSchema,
    required: true
  },
  quantity: {
    type: Number,
    required: true,
    min: 1
  },
  /** Short, human-searchable reference code shown on invoices (derived from _id, generated post-create). */
  orderNumber: {
    type: String,
    index: true,
    default: null
  },
  unit_price: {
    type: Number,
    required: true
  },
  shipping_method: {
    type: String,
    enum: ['post', 'tipax', 'chapar', 'intercity_freight', 'courier', 'own_vehicle', null],
    default: null
  },
  shipping_cost: {
    type: Number,
    default: 0
  },
  commission_amount: {
    type: Number,
    required: true
  },
  seller_net_amount: {
    type: Number,
    required: true
  },
  total_amount: {
    type: Number,
    required: true
  },
  status: {
    type: String,
    enum: [
      'pending_payment',
      'on_hold',
      'failed',
      'processing',
      'shipped',
      'ready_for_pickup',
      'completed',
      'cancelled',
      'refunded'
    ],
    default: 'pending_payment',
    index: true
  },
  tracking_code: {
    type: String,
    trim: true,
    default: null
  },
  paymentAuthority: {
    type: String,
    default: null
  },
  buyerAddressSnapshot: {
    type: buyerAddressSnapshotSchema,
    default: null
  },
  fulfilledAt: {
    type: Date,
    default: null
  },
  completedAt: {
    type: Date,
    default: null
  },
  buyerConfirmedReceiptAt: {
    type: Date,
    default: null
  },
  receiptDeadlineAt: {
    type: Date,
    default: null
  },
  returnWindowExpiresAt: {
    type: Date,
    default: null
  },
  walletReleased: {
    type: Boolean,
    default: false
  },
  cancelReason: {
    type: String,
    default: null
  },
  refundReason: {
    type: String,
    default: null
  }
})

orderSchema.plugin(timestamp)
orderSchema.plugin(mongoosePaginate)

const OrderModel = mongoose.model('Order', orderSchema)
module.exports = OrderModel