import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:logging/logging.dart';
import 'package:fcs/vo/product.dart';
import 'package:fcs/vo/setting.dart';

import 'base_model.dart';
import 'constants.dart';
import 'firebase_helper.dart';

class ProductModel extends BaseModel {
final log = Logger('ProductModel');

  List<Product> products = [];
  List<Product> tempProducts = [];

  List<ProductPrice> get getPrices {
    List<ProductPrice> productPrices = [];
    this.products.forEach((p) => productPrices.addAll(p.getPrices));
    productPrices.sort((p1, p2) => p1.compareTo(p2));
    return productPrices;
  }

  String getProductName(String productID) {
    return products.firstWhere((p) => p.id == productID).name;
  }

  Product getProduct(String productID) {
    return products.firstWhere((p) => p.id == productID);
  }

  List<Product> get productsToEdit {
    // clone products
    tempProducts = products.map((p) => Product.clone(p)).toList();
    tempProducts.sort((p1, p2) => p1.displayOrder.compareTo(p2.displayOrder));
    // set old price with price
    tempProducts.forEach((p) {
      p.oldPirce = p.price;
      p.action = "update";
    });

    return tempProducts;
  }

  void saveProduct(Product product, String name, price, displayOrder, int color,
      bool isDisable) {
    if (product == null) {
      tempProducts.add(Product(
          action: "create",
          name: name,
          price: int.parse(price),
          color: color,
          displayOrder: int.parse(displayOrder),
          isDisable: isDisable));
    } else {
      Product _product = product;
      _product.name = name;
      _product.price = int.parse(price);
      _product.color = color;
      _product.displayOrder = int.parse(displayOrder);
      _product.isDisable = isDisable;
      if (_product.id == null) {
        _product.action = "create";
      } else {
        _product.action = "update";
      }
    }
    notifyListeners();
  }

  void deleteProduct(Product product) {
    if (product == null) {
      return;
    }
    if (product.id == null) {
      tempProducts.remove(product);
    } else {
      Product _product = tempProducts.firstWhere((p) => p.id == product.id);
      _product.action = "delete";
    }
    notifyListeners();
  }

  @override
  void initSetting(Setting setting) {
    super.initSetting(setting);

    try {
      getQuerySnapshot(
              "/$biz_collection/${setting.okEnergyId}/$product_collection")
          .listen((QuerySnapshot snapshot) {
        products.clear();
        products = snapshot.documents.map((documentSnapshot) {
          var data = Product.fromMap(
              documentSnapshot.data, documentSnapshot.documentID);
          return data;
        }).toList();
        products.sort((p1, p2) => p1.displayOrder.compareTo(p2.displayOrder));
        notifyListeners();
      }).onError((e) {
        log.warning("Error! $e");
      });
    } catch (e) {
      log.warning("Error!! $e");
    }
  }

  @override
  logout() async {
    tempProducts = [];
  }

  updateProducts(List<Product> products) async {
    var items = [];
    products.forEach((p) {
      if (p.action != null) items.add(p.toMap());
    });
    await request("/products", "PUT", payload: items, token: await getToken());
  }
}