/**
 * Copyright (c) 2018, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

define(['require', 'log', 'jquery', 'lodash', 'attribute', 'aggregation', 'aggregateByTimePeriod', 'querySelect',
        'elementUtils', 'storeAnnotation', 'designViewUtils'],
    function (require, log, $, _, Attribute, Aggregation, AggregateByTimePeriod, QuerySelect, ElementUtils, 
              StoreAnnotation, DesignViewUtils) {

        /**
         * @class AggregationForm Creates a forms to collect data from a aggregation
         * @constructor
         * @param {Object} options Rendering options for the view
         */
        var AggregationForm = function (options) {
            if (options !== undefined) {
                this.configurationData = options.configurationData;
                this.application = options.application;
                this.formUtils = options.formUtils;
                this.consoleListManager = options.application.outputController;
                var currentTabId = this.application.tabController.activeTab.cid;
                this.designViewContainer = $('#design-container-' + currentTabId);
                this.toggleViewButton = $('#toggle-view-button-' + currentTabId);
            }
        };

        /**
         * @function generate properties form for a aggregation
         * @param element selected element(aggregation)
         * @param formConsole Console which holds the form
         * @param formContainer Container which holds the form
         */
        AggregationForm.prototype.generatePropertiesForm = function (element, formConsole, formContainer) {
            var self = this;
            // The design view container is disabled to prevent the user from dropping any elements
            self.designViewContainer.addClass('disableContainer');
            self.toggleViewButton.addClass('disableContainer');

            var id = $(element).parent().attr('id');
            // retrieve the aggregation information from the collection
            var clickedElement = self.configurationData.getSiddhiAppConfig().getAggregation(id);
            if (!clickedElement) {
                var errorMessage = 'unable to find clicked element';
                log.error(errorMessage);
                throw errorMessage;
            }

            if (!clickedElement.getFrom()) {
                DesignViewUtils.prototype.warnAlert('Connect an input stream element');
                self.designViewContainer.removeClass('disableContainer');
                self.toggleViewButton.removeClass('disableContainer');

                // close the form window
                self.consoleListManager.removeFormConsole(formConsole);
            } else {

                var savedAnnotations = clickedElement.getAnnotationList();
                var annotations = [];
                _.forEach(savedAnnotations, function (savedAnnotation) {
                    annotations.push({annotation: savedAnnotation});
                });

                var storeAnnotation = {};
                if (clickedElement.getStore() !== undefined) {
                    var savedStoreAnnotation = clickedElement.getStore();
                    var savedStoreAnnotationOptions = savedStoreAnnotation.getOptions();
                    var storeOptions = [];
                    for (var key in savedStoreAnnotationOptions) {
                        if (savedStoreAnnotationOptions.hasOwnProperty(key)) {
                            storeOptions.push({
                                key: key,
                                value: savedStoreAnnotationOptions[key]
                            });
                        }
                    }
                    storeAnnotation = {
                        annotationType: savedStoreAnnotation.getType(),
                        storeOptions: storeOptions
                    };
                }

                var name = clickedElement.getName();
                var from = clickedElement.getFrom();
                var select = undefined;
                if (clickedElement.getSelect() !== undefined) {
                    select = clickedElement.getSelect().getValue();
                }
                var savedGroupByAttributes = clickedElement.getGroupBy();
                var aggregateByAttribute = clickedElement.getAggregateByAttribute();
                var aggregateByTimePeriod = clickedElement.getAggregateByTimePeriod();

                var groupBy = [];
                _.forEach(savedGroupByAttributes, function (savedGroupByAttribute) {
                    var groupByAttributeObject = {
                        attribute: savedGroupByAttribute
                    };
                    groupBy.push(groupByAttributeObject);
                });

                var fillAnnotation = {
                    annotations: annotations,
                    storeAnnotation: storeAnnotation
                };
                fillAnnotation = self.formUtils.cleanJSONObject(fillAnnotation);

                var fillInput = {
                    name: name,
                    from: from
                };

                var fillSelect = {};
                if (groupBy.length === 0) {
                    fillSelect = {
                        select: select
                    };
                } else {
                    fillSelect = {
                        select: select,
                        groupBy: groupBy
                    };
                }

                var fillAggregate = {};
                if (aggregateByTimePeriod !== undefined && !aggregateByTimePeriod.getMaxValue()) {
                    fillAggregate = {
                        aggregateByAttribute: {
                            attribute: aggregateByAttribute
                        },
                        aggregateByTimePeriod: {
                            minValue: (aggregateByTimePeriod.getMinValue()).toLowerCase()
                        }
                    };
                } else if (aggregateByTimePeriod !== undefined) {
                    fillAggregate = {
                        aggregateByAttribute: {
                            attribute: aggregateByAttribute
                        },
                        aggregateByTimePeriod: {
                            minValue: (aggregateByTimePeriod.getMinValue()).toLowerCase(),
                            maxValue: (aggregateByTimePeriod.getMaxValue()).toLowerCase()
                        }
                    };
                } else {
                    fillAggregate = {
                        aggregateByAttribute: {
                            attribute: aggregateByAttribute
                        }
                    };
                }
                fillAggregate = self.formUtils.cleanJSONObject(fillAggregate);

                formContainer.append('<div class="col-md-12 section-seperator frm-qry"><div class="col-md-4">' +
                    '<div class="row"><div id="form-aggregation-annotation" class="col-md-12 section-seperator frm-agr"></div></div>' +
                    '<div class="row"><div id="form-aggregation-input" class="col-md-12"></div></div></div>' +
                    '<div id="form-aggregation-select" class="col-md-4 frm-agr"></div>' +
                    '<div id="form-aggregation-aggregate" class="col-md-4"></div></div>');

                var possibleGroupByAttributes = [];
                var savedSource = self.configurationData.getSiddhiAppConfig().getDefinitionElementByName(from);
                if (savedSource !== undefined) {
                    if (savedSource.type !== undefined && (savedSource.type === 'STREAM')) {
                        var timestampAttributeFound = false;
                        if (savedSource.element !== undefined) {
                            _.forEach(savedSource.element.getAttributeList(), function (attribute) {
                                if (attribute.getName().toLowerCase() === 'timestamp') {
                                    timestampAttributeFound = true;
                                }
                                possibleGroupByAttributes.push(attribute.getName());
                            });
                        }
                        if (!timestampAttributeFound) {
                            possibleGroupByAttributes.push('timestamp');
                        }
                    } else if (savedSource.type !== undefined && (savedSource.type === 'TRIGGER')) {
                        possibleGroupByAttributes.push('triggered_time');
                    }
                }

                // generate the form to define a aggregation
                var editorAnnotation = new JSONEditor($(formContainer).find('#form-aggregation-annotation')[0], {
                    schema: {
                        type: "object",
                        title: "Aggregation Annotations",
                        properties: {
                            annotations: {
                                propertyOrder: 1,
                                type: "array",
                                format: "table",
                                title: "Add Annotations",
                                uniqueItems: true,
                                minItems: 1,
                                items: {
                                    type: "object",
                                    title: "Annotation",
                                    options: {
                                        disable_properties: true
                                    },
                                    properties: {
                                        annotation: {
                                            title: "Annotation",
                                            type: "string",
                                            minLength: 1
                                        }
                                    }
                                }
                            },
                            storeAnnotation: {
                                propertyOrder: 2,
                                title: "Store Annotation",
                                type: "object",
                                options: {
                                    disable_properties: true
                                },
                                properties: {
                                    annotationType: {
                                        propertyOrder: 1,
                                        required: true,
                                        title: "Type",
                                        type: "string",
                                        minLength: 1
                                    },
                                    storeOptions: {
                                        propertyOrder: 2,
                                        required: true,
                                        type: "array",
                                        format: "table",
                                        title: "Options",
                                        uniqueItems: true,
                                        minItems: 1,
                                        items: {
                                            type: "object",
                                            title: "Option",
                                            options: {
                                                disable_properties: true
                                            },
                                            properties: {
                                                key: {
                                                    required: true,
                                                    title: "Key",
                                                    type: "string",
                                                    minLength: 1
                                                },
                                                value: {
                                                    required: true,
                                                    title: "value",
                                                    type: "string",
                                                    minLength: 1
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    },
                    startval: fillAnnotation,
                    show_errors: "always",
                    display_required_only: true,
                    no_additional_properties: true,
                    disable_array_delete_all_rows: true,
                    disable_array_delete_last_row: true
                });
                var editorInput = new JSONEditor($(formContainer).find('#form-aggregation-input')[0], {
                    schema: {
                        type: "object",
                        title: "Aggregation Input",
                        properties: {
                            name: {
                                type: "string",
                                title: "Name",
                                minLength: 1,
                                required: true,
                                propertyOrder: 1
                            },
                            from: {
                                type: "string",
                                title: "From",
                                template: from,
                                required: true,
                                propertyOrder: 2
                            }
                        }
                    },
                    startval: fillInput,
                    show_errors: "always",
                    disable_properties: true,
                    display_required_only: true,
                    no_additional_properties: true
                });
                var selectScheme = {
                    schema: {
                        options: {
                            disable_properties: false
                        },
                        type: "object",
                        title: "Aggregation Select",
                        properties: {
                            select: {
                                propertyOrder: 1,
                                title: "Select",
                                required: true,
                                oneOf: [
                                    {
                                        $ref: "#/definitions/selectAll",
                                        title: "All Attributes"
                                    },
                                    {
                                        $ref: "#/definitions/selectUserDefined",
                                        title: "User Defined Attributes"
                                    }
                                ]
                            },
                            groupBy: {
                                propertyOrder: 2,
                                type: "array",
                                format: "table",
                                title: "Group By Attributes",
                                uniqueItems: true,
                                minItems: 1,
                                items: {
                                    type: "object",
                                    title: 'Attribute',
                                    properties: {
                                        attribute: {
                                            type: 'string',
                                            title: 'Attribute Name',
                                            enum: possibleGroupByAttributes
                                        }
                                    }
                                }
                            }
                        },
                        definitions: {
                            selectUserDefined: {
                                required: true,
                                type: "array",
                                format: "table",
                                title: "Select Attributes",
                                uniqueItems: true,
                                minItems: 1,
                                items: {
                                    title: "Value Set",
                                    type: "object",
                                    properties: {
                                        expression: {
                                            title: "Expression",
                                            type: "string",
                                            minLength: 1
                                        },
                                        as: {
                                            title: "As",
                                            type: "string"
                                        }
                                    }
                                }
                            },
                            selectAll: {
                                type: "string",
                                title: "Select All Attributes",
                                template: '*'
                            }
                        }
                    },
                    show_errors: "always",
                    startval: fillSelect,
                    disable_properties: false,
                    disable_array_delete_all_rows: true,
                    disable_array_delete_last_row: true,
                    display_required_only: true,
                    no_additional_properties: true
                };
                var editorSelect = new JSONEditor($(formContainer).find('#form-aggregation-select')[0], selectScheme);
                var aggregateScheme = {
                    schema: {
                        type: "object",
                        title: "Aggregate By",
                        properties: {
                            aggregateByAttribute: {
                                type: "object",
                                title: "Aggregate by Attribute",
                                propertyOrder: 1,
                                properties: {
                                    attribute: {
                                        required: true,
                                        type: "string",
                                        title: "Attribute Name",
                                        minLength: 1
                                    }
                                }
                            },
                            aggregateByTimePeriod: {
                                required: true,
                                type: "object",
                                title: "Aggregate by Time Period",
                                propertyOrder: 2,
                                options: {
                                    disable_properties: false
                                },
                                properties: {
                                    minValue: {
                                        type: "string",
                                        title: "Starting Time Value",
                                        required: true,
                                        enum: [
                                            "seconds",
                                            "minutes",
                                            "hours",
                                            "days",
                                            "weeks",
                                            "months",
                                            "years"
                                        ],
                                        default: "seconds"
                                    },
                                    maxValue: {
                                        type: "string",
                                        title: "Ending Time Value",
                                        enum: [
                                            "seconds",
                                            "minutes",
                                            "hours",
                                            "days",
                                            "weeks",
                                            "months",
                                            "years"
                                        ],
                                        default: "seconds"
                                    }
                                }
                            }
                        }
                    },
                    startval: fillAggregate,
                    show_errors: "always",
                    disable_properties: false,
                    display_required_only: true,
                    no_additional_properties: true
                };
                var editorAggregate =
                    new JSONEditor($(formContainer).find('#form-aggregation-aggregate')[0], aggregateScheme);

                formContainer.append(self.formUtils.buildFormButtons(true));

                // 'Submit' button action
                var submitButtonElement = $(formContainer).find('#btn-submit')[0];
                submitButtonElement.addEventListener('click', function () {
                    var annotationErrors = editorAnnotation.validate();
                    var inputErrors = editorInput.validate();
                    var selectErrors = editorSelect.validate();
                    var aggregateErrors = editorAggregate.validate();
                    if (annotationErrors.length || inputErrors.length || selectErrors.length || aggregateErrors.length) {
                        return;
                    }
                    var isAggregationNameUsed =
                        self.formUtils.isDefinitionElementNameUnique(editorInput.getValue().name, clickedElement.getId());
                    if (isAggregationNameUsed) {
                        DesignViewUtils.prototype
                            .errorAlert("Aggregation name \"" + editorInput.getValue().name + "\" is already used.");
                        return;
                    }

                    var configAnnotation = editorAnnotation.getValue();
                    var configInput = editorInput.getValue();
                    var configSelect = editorSelect.getValue();
                    var configAggregate = editorAggregate.getValue();

                    clickedElement.clearAnnotationList();
                    _.forEach(configAnnotation.annotations, function (annotation) {
                        clickedElement.addAnnotation(annotation.annotation);
                    });

                    // update selected aggregation model
                    clickedElement.setName(configInput.name);
                    clickedElement.setFrom(configInput.from);

                    // add the store annotation for aggregation
                    if (configAnnotation.storeAnnotation !== undefined) {
                        var optionsMap = {};
                        _.forEach(configAnnotation.storeAnnotation.storeOptions, function (option) {
                            optionsMap[option.key] = option.value;
                        });

                        var storeAnnotationOptions = {};
                        _.set(storeAnnotationOptions, 'type', configAnnotation.storeAnnotation.annotationType);
                        _.set(storeAnnotationOptions, 'options', optionsMap);

                        var storeAnnotation = new StoreAnnotation(storeAnnotationOptions);
                        clickedElement.setStore(storeAnnotation);
                    } else {
                        clickedElement.setStore(undefined);
                    }

                    var selectAttributeOptions = {};
                    if (configSelect.select instanceof Array) {
                        _.set(selectAttributeOptions, 'type', 'USER_DEFINED');
                        _.set(selectAttributeOptions, 'value', configSelect.select);
                    } else if (configSelect.select === "*") {
                        _.set(selectAttributeOptions, 'type', 'ALL');
                        _.set(selectAttributeOptions, 'value', configSelect.select);
                    } else {
                        console.log("Value other than \"USER_DEFINED\" and \"ALL\" received!");
                    }
                    var selectObject = new QuerySelect(selectAttributeOptions);
                    clickedElement.setSelect(selectObject);

                    if (configSelect.groupBy !== undefined) {
                        var groupByAttributes = [];
                        _.forEach(configSelect.groupBy, function (groupByAttribute) {
                            groupByAttributes.push(groupByAttribute.attribute);
                        });
                        clickedElement.setGroupBy(groupByAttributes);
                    } else {
                        clickedElement.setGroupBy(undefined);
                    }

                    if (configAggregate.aggregateByAttribute !== undefined
                        && configAggregate.aggregateByAttribute.attribute !== undefined) {
                        clickedElement.setAggregateByAttribute(configAggregate.aggregateByAttribute.attribute);
                    } else {
                        clickedElement.setAggregateByAttribute(undefined);
                    }

                    var aggregateByTimePeriodOptions = {};
                    _.set(aggregateByTimePeriodOptions, 'minValue',
                        (configAggregate.aggregateByTimePeriod.minValue).toUpperCase());
                    if (configAggregate.aggregateByTimePeriod.maxValue !== undefined) {
                        _.set(aggregateByTimePeriodOptions, 'maxValue',
                            (configAggregate.aggregateByTimePeriod.maxValue).toUpperCase());
                    } else {
                        _.set(aggregateByTimePeriodOptions, 'maxValue', undefined);
                    }
                    var aggregateByTimePeriod = new AggregateByTimePeriod(aggregateByTimePeriodOptions);
                    clickedElement.setAggregateByTimePeriod(aggregateByTimePeriod);

                    var textNode = $(element).parent().find('.aggregationNameNode');
                    textNode.html(configInput.name);

                    // design view container and toggle view button are enabled
                    self.designViewContainer.removeClass('disableContainer');
                    self.toggleViewButton.removeClass('disableContainer');

                    // close the form aggregation
                    self.consoleListManager.removeFormConsole(formConsole);
                });

                // 'Cancel' button action
                var cancelButtonElement = $(formContainer).find('#btn-cancel')[0];
                cancelButtonElement.addEventListener('click', function () {
                    // design view container and toggle view button are enabled
                    self.designViewContainer.removeClass('disableContainer');
                    self.toggleViewButton.removeClass('disableContainer');

                    // close the form aggregation
                    self.consoleListManager.removeFormConsole(formConsole);
                });
            }
        };

        return AggregationForm;
    });
