/**
 * A pane that displays/edits basic food objects
 */
(function() {
    (function() {
        try {return angular.module('ieat.ui.editors')}
        catch {return angular.module('ieat.ui.editors', ['ndbDatabase','Units'])}}
    )().component('basicFoodEditor', {
        templateUrl: 'static/templates/basicFoodEditor.html',
        bindings: {
            ndbKey: '@',
            food: '<'
        },
        controller: [
            '$scope', '$q', 'NDBList', 'NDBWeight', 'NDBNutrDef', 'Unit',
            function($scope, $q, NDBList, NDBWeight, NDBNutrDef, Unit) {
                var self = this;
                $scope.units_symbol = {};
                Unit.primary(function(units) {
                    units.forEach(function(elm) {
                        $scope.units_symbol[elm.type] = elm.symbol;
                    });
                });
                NDBNutrDef.query(function(data) {
                    $scope.nutrients = data.reduce(function(r, n) {
                        r[n.nutr_no] = {name: n.nutr_desc, unit: n.unit};
                        return r;
                    }, {});
                });
                this.$onInit = function() {
                    $scope.categories = NDBList.get({
                        key: self.ndbKey,
                        type: "g"
                    });

                    var getCanidateUnit = function(weight, units) {
                        return units.find(function(u) {
                            var w = weight.msre_desc.toLowerCase();
                            return u.type == "volume" &&
                                (w == u.symbol.toLowerCase()
                                 || u.aliases.some(function(a) {
                                     return w == a.toLowerCase();
                                 }));
                        });
                    };
                    
                    if (!self.food.density) {
                        $q.all([
                            NDBWeight.query({ndbno: self.food.ndbno}).$promise,
                            Unit.query().$promise
                        ]).then(function(res) {
                            for (var i = 0; i < res[0].length; i++) {
                                var w = res[0][i];
                                var unit = getCanidateUnit(w, res[1]);
                                if (unit) {
                                    self.food.density =
                                        w.gm_wgt / (w.amount * unit.conversion);
                                    return;
                                }
                            }
                        }, function() {
                            // TODO: Error handling
                            console.err("Failed to get weight information.")
                        });
                    }
                    if (!self.food.unit_type) {
                        self.food.unit_type = "Mass";
                        self.food.dry = true;
                    }
                };
            }]
    });
})();