import 'dart:convert';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:logging/logging.dart';
import 'package:fcs/config.dart';
import 'package:fcs/model/firebase_helper.dart';
import 'package:fcs/vo/po.dart';
import 'package:fcs/vo/po_do_count.dart';
import 'package:fcs/vo/revenue.dart';

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

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

  List<POChartData> chartSummary = [];

  Revenue revenue = new Revenue();
  PODOCount podoCount = new PODOCount();
  void initUser(user) async {
    super.initUser(user);
    revenue = new Revenue();
    podoCount = new PODOCount();

    _loadRev();
    _loadPODOCount();
    if (user.hasPO() || user.isOwnerAndAbove()) {
      _getSummary();
    }
  }

  Future<void> _loadRev() async {
    try {
      String path = "/$biz_collection/${setting.okEnergyId}/$report_collection";
      String reportID = "revenue";

      if (user.isBuyer()) {
        path =
            "/$biz_collection/${setting.okEnergyId}/$buyer_collection/${user.docID}/$report_collection";
        reportID = "spending";
      }

      getDocSnapshot(path, reportID).listen((DocumentSnapshot snapshot) async {
        if (snapshot.data == null) {
          return;
        }
        revenue = Revenue.fromMap(snapshot.data, snapshot.documentID);
        notifyListeners();
      }).onError((e) {
        log.warning("Error! $e");
      });
    } catch (e) {
      log.warning("Error!! $e");
    }
  }

  Future<void> _loadPODOCount() async {
    try {
      String path = "/$biz_collection/${setting.okEnergyId}/$report_collection";
      String reportID = "po_do_count";

      if (user.isBuyer()) {
        path =
            "/$biz_collection/${setting.okEnergyId}/$buyer_collection/${user.docID}/$report_collection";
      }

      getDocSnapshot(path, reportID).listen((DocumentSnapshot snapshot) async {
        if (snapshot.data == null) {
          return;
        }
        podoCount = PODOCount.fromMap(snapshot.data, snapshot.documentID);
        notifyListeners();
      }).onError((e) {
        log.warning("Error! $e");
      });
    } catch (e) {
      log.warning("Error!! $e");
    }
  }

  @override
  logout() async {
    chartSummary = [];
    revenue = new Revenue();
    podoCount = new PODOCount();
  }

  _getSummary() async {
    chartSummary.clear();
    try {
      var data = {
        "fields": 'quantity,product_id,product_name,color',
        "aggfuns": "sum,,,",
        "groupbys": 'product_id',
      };
      var result = await request("/api/data/po_product_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));
      if (result == null) return;
      chartSummary.clear();
      result.forEach((chart) {
        var _list = POChartData.fromJson(chart, "quantity_sum");
        chartSummary.add(_list);
      });
    } catch (e) {
      log.warning("Error get Summary>>>>${e.toString()}");
    }
  }

  Future<List<POChartData>> loadSummary() async {
    List<POChartData> _list = List();
    try {
      var data = {
        "fields": 'quantity,product_id,product_name,color',
        "aggfuns": "sum,,,",
        "groupbys": 'product_id',
      };
      var result = await request("/api/data/po_product_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));
      if (result != null) {
        result.forEach((chart) {
          var _data = POChartData.fromJson(chart, "quantity_sum");
          _list.add(_data);
        });
      }
      return _list;
    } catch (e) {
      log.warning("Error>>>>${e.toString()}");
      return null;
    }
  }

  Future<List<POChartData>> loadUsers() async {
    List<POChartData> _list = List();
    var data = {
      "fields": 'quantity,user_name,product_name',
      "aggfuns": "sum,,",
      "groupbys": 'product_id,user_id',
    };
    try {
      var result = await request("/api/data/po_product_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));

      result.forEach((chart) {
        var _buyer = POChartData.fromJson(chart, "quantity_sum");
        _list.add(_buyer);
      });
      return _list;
    } catch (e) {
      log.warning("Error load>>>>${e.toString()}");
      return null;
    }
  }

  Future<List<POBuyerData>> loadPOBalancesForBuyer_() async {
    List<POBuyerData> _list = List();
    try {
      var data = {
        "fields": 'amount,status',
        "aggfuns": "sum,",
        "groupbys": 'status',
        "filters": [
          {"field": "user_id", "compare": "==", "value": user.docID}
        ]
      };
      var result = await request("/api/data/po_buyer_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));

      if (result != null) {
        result.forEach((chart) {
          var _data = POBuyerData.fromJson(chart, "amount_sum");
          _list.add(_data);
        });
      }
      return _list;
    } catch (e) {
      log.warning("Error>>>>${e.toString()}");
      return null;
    }
  }

  Future<List<POChartData>> loadPOBalancesForBuyer() async {
    List<POChartData> _list = List();
    try {
      var data = {
        "fields": 'quantity,product_id,product_name,user_id,color',
        "aggfuns": "sum,,,,",
        "groupbys": 'product_id,user_id',
        "filters": [
          {"field": "user_id", "compare": "==", "value": user.docID}
        ]
      };
      var result = await request("/api/data/po_product_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));
      if (result != null) {
        result.forEach((chart) {
          var _data = POChartData.fromJson(chart, "quantity_sum");
          _list.add(_data);
        });
      }
      return _list;
    } catch (e) {
      log.warning("Error>>>>${e.toString()}");
      return null;
    }
  }

  Future<List<POChartData>> loadPOBalProductsForBuyer() async {
    List<POChartData> _list = List();
    var data = {
      "fields": 'quantity,user_name,user_id,product_name',
      "aggfuns": "sum,,,",
      "groupbys": 'product_id,user_id',
      "filters": [
        {"field": "user_id", "compare": "==", "value": user.docID}
      ]
    };
    try {
      var result = await request("/api/data/po_product_view", "POST",
          token: await getToken(),
          url: Config.instance.reportURL,
          payload: jsonEncode(data));
      result.forEach((chart) {
        var _buyer = POChartData.fromJson(chart, "quantity_sum");
        _list.add(_buyer);
      });
      return _list;
    } catch (e) {
      log.warning("Error load>>>>${e.toString()}");
      return null;
    }
  }
}