import 'dart:async';
import 'dart:io';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:path/path.dart' as Path;
import 'package:fcs/vo/buyer.dart';

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

class Attachments {
  File nricFront, nricBack;
}

class RegModel extends BaseModel {
  Buyer reg = Buyer();
  bool isLoaded = false;

  StreamSubscription regListener;

  void initUser(user) {
    super.initUser(user);
    if (user.isRegisteredBuyer()) {
      _loadReg();
    } else {
      reg = Buyer();
    }
  }

  @override
  logout() async {
    if (regListener != null) await regListener.cancel();
    reg = Buyer();
  }

  Future<void> _loadReg() async {
    if (regListener != null) {
      regListener.cancel();
    }
    regListener = getDocSnapshot(
            "/$biz_collection/${setting.okEnergyId}/$buyer_collection",
            "${user.docID}")
        .listen((snap) async {
      if (snap.exists) {
        reg = Buyer.fromMap(snap.data, snap.documentID);
        QuerySnapshot q = await getSnapshot(
            "/$biz_collection/${setting.okEnergyId}/$buyer_collection/${user.docID}/$product_collection");
        reg.buyerProducts.clear();
        q.documents.forEach((d) {
          reg.buyerProducts.add(BuyerProduct.fromMap(d.data, d.documentID));
        });
      } else {
        reg = Buyer();
      }
      isLoaded = true;
      notifyListeners();
    });
  }

  Future<void> register(Buyer buyer, Attachments attachments) async {
    String path = Path.join(reg_files_path, user.docID);
    String urlFront = await uploadStorage(path, attachments.nricFront);
    buyer.nricFrontUrl = urlFront;
    String urlBack = await uploadStorage(path, attachments.nricBack);
    buyer.nricBackUrl = urlBack;

    await request("/reg", "POST",
        payload: buyer.toMap(), token: await getToken());
  }

  Future<void> update(Buyer buyer, Attachments attachments) async {
    String path = Path.join(reg_files_path, user.docID);
    if (attachments.nricFront != null) {
      String urlFront = await uploadStorage(path, attachments.nricFront);
      buyer.nricFrontUrl = urlFront;
    }
    if (attachments.nricBack != null) {
      String urlBack = await uploadStorage(path, attachments.nricBack);
      buyer.nricBackUrl = urlBack;
    }

    await request("/buyer/update", "PUT",
        payload: buyer.toMap(), token: await getToken());
  }
}