eHealthAfrica/LMIS-Chrome

'use strict';

angular.module('lmisChromeApp')
  .factory('wasteCountFactory', function ($filter, storageService, utility, $q, syncService) {

    var DB_NAME = storageService.DISCARD_COUNT;
    var wasteReasons = [
      'VVM Stage 3',
      'Broken Vial',
      'Label Missing',
      'Unopened Expiry',
      'Opened Expiry',
      'Suspected Freezing',
      'Other'
    ];

    var isoDate = function(_date){
      var date = (angular.isDefined(_date)) ? new Date(_date) : new Date();
      return $filter('date')(date, 'yyyy-MM-dd');
    };

    var getCategoriesExcludeFromCount = function(){
      //TODO: this needs to be in a database or some sort of setup script
      return [
        'd5ffa6bd-58d2-41b5-a688-6a9d6894c5ae',
        'a0f10e2e-cffa-42c4-832b-1ba0e48caa64',
        '99fde088-7ff2-4545-b0c1-8f2c36911f01',
        '1c761db0-d7f3-4abf-8c12-6c678f862851'
      ];
    };

    var addRecord = function(object){
      var deferred = $q.defer();
      if(object.countDate instanceof Date){
        object.countDate = object.countDate.toJSON();
      }
      getWasteCountByDate(object.countDate).then(function(wasteCount){
        if(wasteCount !== null){
          object.uuid = wasteCount.uuid;
        }
        storageService.save(storageService.DISCARD_COUNT, object)
            .then(function(uuid){
              deferred.resolve(uuid);
            }, function(reason){
              deferred.reject(reason);
            })
            .catch(function(reason){
              deferred.reject(reason);
            });
      });
      return deferred.promise;
    };

    var getWasteCountByDate = function (date) {
      date = date instanceof Date ? isoDate(date.toJSON()) : isoDate(date);
      var deferred = $q.defer();
      storageService.all(DB_NAME)
          .then(function (wasteCounts) {
            wasteCounts = wasteCounts
                .filter(function(countRow){
                  return isoDate(countRow.countDate) === isoDate(date);
                });
            var wasteCount = (wasteCounts.length) ? wasteCounts[0] : null;
            deferred.resolve(wasteCount);
          })
          .catch(function(reason){
            deferred.reject(reason);
          });
      return deferred.promise;
    };

    var load={
      /**
       *
       * @returns {promise}
       */
      allWasteCount: function(){
        var deferred = $q.defer();
        storageService.all(DB_NAME)
          .then(function(wasteCounts){
            wasteCounts = syncService.addSyncStatus(wasteCounts);
            deferred.resolve(wasteCounts);
          })
          .catch(function(reason){
            deferred.reject(reason);
          });
        return deferred.promise;
      },

      productObject: function(array){
        array = array
            .filter(function(product){
              var excludedCategories = getCategoriesExcludeFromCount();
              if(angular.isObject(product.category)){
                return excludedCategories.indexOf(product.category.uuid) === -1;
              }
              return excludedCategories.indexOf(product.category) === -1;
            });
        return utility.castArrayToObject(array, 'uuid');
      },
      wasteCountByType: function(wasteCount, facilityProductProfiles){
        var arr = [];

        if(Object.prototype.toString.call(wasteCount) === '[object Object]'){
          for(var i in wasteCount.discarded){
            if(angular.isDefined(facilityProductProfiles[i])){
              var uom = facilityProductProfiles[i].presentation.uom.symbol;
              arr.push({
                header: true,
                value: wasteCount.discarded[i],
                key: i,
                uom: uom
              });
              if((Object.keys(wasteCount.reason[i])).length > 0){
                for(var j in wasteCount.reason[i]){
                  if(wasteCount.reason[i][j] !== 0 && wasteCount.reason[i][j] !== ''){
                    arr.push(
                      {
                        header: false,
                        value: wasteCount.reason[i][j],
                        key: j,
                        uom: uom
                      }
                    );
                  }
                }
              }
            }
          }
        }
        return arr;
      },
      productName: function(row, facilityProducts){
        var name = row.key;
        if(row.header){
          name = facilityProducts[row.key].name;
        }
        else{
          name = wasteReasons[row.key];
        }
        return name;
      }
    };
    return {

      wasteReasons: wasteReasons,
      add: addRecord,
      get:load,
      getWasteCountByDate: getWasteCountByDate,
      DB_NAME: DB_NAME
    };
  });