const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const shared_consts = require('../tools/shared_nodejs');

const Order = require('../models/order');

const CartSchema = new Schema({
  idapp: {
    type: String
  },
  userId: { type: Schema.Types.ObjectId, ref: 'User' },
  totalQty: { type: Number, default: 0 },
  totalPrice: { type: Number, default: 0 },
  items: [
    {
      order:
        { type: Schema.Types.ObjectId, ref: 'Order' }
    }
  ],
  note: {
    type: String
  },
  modify_at: {
    type: Date
  },
});

var Cart = module.exports = mongoose.model('Cart', CartSchema);

module.exports.findAllIdApp = async function (idapp, userId) {
  const myfind = { idapp, userId };

  return await Cart.findOne(myfind);
};


module.exports.getCartByUserId = async function (uid, idapp) {
  let query = { userId: uid, idapp }
  const mycart = await Cart.findOne(query);

  if (!!mycart) {
    for (const idkey in mycart.items) {
      try {
        idorder = mycart.items[idkey]._id.toString();
        const myorder = mycart.items[idkey].order;
        if (!!myorder) {
          idorder = mycart.items[idkey].order._id.toString();
        }
        const myord = await Order.getTotalOrderById(idorder);
        if (myord.length > 0) {
          mycart.items[idkey]._doc.order = myord[0];
        }
      } catch (e) {
        console.log('err', e);
      }
    }
    return mycart;
  }
  return null;

}

module.exports.updateCartByUserId = function (userId, newCart, callback) {
  let query = { userId: userId }
  Cart.find(query, function (err, c) {
    if (err) throw err

    //exist cart in databse
    if (c.length > 0) {
      Cart.findOneAndUpdate(
        { userId: userId },
        {
          $set: {
            items: newCart.items,
            totalQty: newCart.totalQty,
            totalPrice: newCart.totalPrice,
            userId: userId
          }
        },
        { new: true },
        callback
      )
    } else {
      //no cart in database
      newCart.save(callback)
    }
  })
}

module.exports.updateCartByCartId = async function (cartId, newCart) {
  // delete newCart._doc._id;
  const items = newCart._doc.items;
  const totalQty = newCart.totalQty;
  const totalPrice = newCart.totalPrice;

  const modify_at = new Date();

  return await Cart.findOneAndUpdate({ _id: cartId }, {
    $set: {
      items,
      totalPrice,
      totalQty,
      modify_at
    }
  }, { new: false })
    .then((ris) => {
      return ris;
    }).catch(err => {
      console.log('err', err);
      return null
    })

}

module.exports.deleteCartByCartId = async function (cartId) {
  return await Cart.remove({ _id: cartId });
}


module.exports.createCart = async function (newCart) {
  return await newCart.save()
}