(function () {
    'use strict';
   
    var serviceId = 'myFormsAdminService';
    angular.module('myformsAdmin').factory(serviceId, ['myFormsDataContext', '$filter', myFormsAdminService]);

    function myFormsAdminService(myFormsDataContext, $filter) {
        var service = {
            getColourPalettes: getColourPalettes,
            addQuestionImage: addQuestionImage,
            getQuestionImage: getQuestionImage,
            handleAnswerFormatsOnSaving: handleAnswerFormatsOnSaving,
            handleChoiceQuestionsOnLoading: handleChoiceQuestionsOnLoading,
            submitForm: submitForm,
            bruteForceSelect: bruteForceSelect,
            createFormFromTemplate: createFormFromTemplate

        };

        var questionImages = [];
        return service;

        //preset colour palettes to choose from when creating a form
        function getColourPalettes() {
            return [
			{
			    set: "1", category: "Classic", palettes: [
                     { backgroundColour: '#FFFFFF', fontColour: '#444444', highlightColour: '#444444', name: 'Default' },
                     { backgroundColour: '#fcfcfc', fontColour: '#050505', highlightColour: '#099CFF', name: 'Blue' },
                     { backgroundColour: '#FFFFFF', fontColour: '#050505', highlightColour: '#D36F1F', name: 'Orange' },
                     { backgroundColour: '#fcfcfc', fontColour: '#050505', highlightColour: '#9DB40D', name: 'Green' },
                     { backgroundColour: '#FFFFFF', fontColour: '#050505', highlightColour: '#C63D0F', name: 'Red' },
                     { backgroundColour: '#fcfcfc', fontColour: '#050505', highlightColour: '#DF3E82', name: 'Pink' },
                     { backgroundColour: '#FFFFFF', fontColour: '#050505', highlightColour: '#9B50BA', name: 'Purple' },
			         { backgroundColour: '#FFFFFF', fontColour: '#666666', highlightColour: '#D76817', name: 'Tangerine' },
                     { backgroundColour: '#EEEEEE', fontColour: '#464646', highlightColour: '#00A6B6', name: 'Turquoise' },
                     { backgroundColour: '#FFFFFF', fontColour: '#666666', highlightColour: '#F45750', name: 'Rose' },
                     { backgroundColour: '#EEEEEE', fontColour: '#464646', highlightColour: '#2F88A7', name: 'Genetic Genre' },
                     { backgroundColour: '#FFFFFF', fontColour: '#666666', highlightColour: '#33C1C9', name: 'Ice' },
                     { backgroundColour: '#EEEEEE', fontColour: '#464646', highlightColour: '#49B571', name: 'Jungle' },
                     { backgroundColour: '#FFFEE9', fontColour: '#464646', highlightColour: '#050504', name: 'CC 1' },
                     { backgroundColour: '#FAECFA', fontColour: '#464646', highlightColour: '#050503', name: 'CC 2' },
                     { backgroundColour: '#EAF3FE', fontColour: '#464646', highlightColour: '#050502', name: 'CC 3' },
                     { backgroundColour: '#EEFAEE', fontColour: '#464646', highlightColour: '#050501', name: 'CC 4' }
			    ]
			    }
            ];
        }

        function addQuestionImage(imageDate, image) {
            var alreadyPresent = false;
            for (var i = 0; i < questionImages.length; i++) {
                if (questionImages[i].image.lastModified === imageDate) {
                    alreadyPresent = true;
                    questionImages[i].image = image;
                    break;
                }
            }
            if (!alreadyPresent)
                questionImages.push({
                    //questionId: questionId,
                    image: image
                });
        }

        //workaround to make ie perform properly on 'selectList' class elements (it selects very slowly otherwise)
        function bruteForceSelect() {
            var selectLists = document.querySelectorAll(".selectList");
            for (var x = 0; x < selectLists.length; x++) {
                selectLists[x].parentNode.insertBefore(selectLists[x], selectLists[x]);
            }
        };

        //submit the form
        function submitForm(isCreate, selectedForm) {
            //fool about with the choice questions so the data is in the correct format for the myforms API
            handleAnswerFormatsOnSaving(selectedForm);
            selectedForm.isFormComplete = true;
            if (selectedForm.formId) { //edit the form
                return myFormsDataContext.editForm(selectedForm.formId, selectedForm);
            } else { //create a new form
                return myFormsDataContext.createForm(selectedForm);
            }
        };

        function getQuestionImage(imageDate){
            for (var i = 0; i < questionImages.length; i++) {
                if (questionImages[i].image != null) {
                    if (questionImages[i].image.lastModified === imageDate) {
                        return questionImages[i].image;
                    }
                }
            }
        }

        //to get the choice quetion response data in the form data into the format expected by MyForms we need to do some work
        function handleAnswerFormatsOnSaving(theForm) {
            //loop through the questionanswers (a question and answer pair)
            for (var i = 0; i < theForm.sections[0].questionAnswers.length; i++) {
                var questionAnswers = theForm.sections[0].questionAnswers[i];
                //only for choice questions
                if (questionAnswers.question.isChoiceQuestion) {
                    //create a choice array for the answer
                    questionAnswers.answer.choices = [];
                    //loop through the choices in the question
                    for (var j = 0; j < questionAnswers.question.choices.length; j++) {
                        //create the choice object
                        var choice = {
                            choice: questionAnswers.question.choices[j].choice,
                            choiceId: questionAnswers.question.choices[j].choiceId,
                            isChosen: false
                        };
                        //if the choice has already been selected (i.e. we are editing the form with existing answers) set its flag
                        if (questionAnswers.answer && questionAnswers.answer.chosen) {
                            if (questionAnswers.answer.chosen.choiceId === questionAnswers.question.choices[j].choiceId)
                                choice.isChosen = true;
                        }
                        //add the choice to the answer choice array
                        if (choice.choiceId !== -1)
                            questionAnswers.answer.choices.push(choice);
                    }
                }
                //do a similar thing for checklist questions
                if (questionAnswers.question.isCheckListQuestion) {
                    for (j = 0; j < questionAnswers.answer.chosen.length; j++) {
                        questionAnswers.answer.chosen[j].isChosen = true;
                    }
                    questionAnswers.answer.choices = questionAnswers.answer.chosen;
                    for (var j = 0; j < questionAnswers.question.choices.length; j++) {
                        var isChosen = false;
                        for (var k = 0; k < questionAnswers.answer.choices.length; k++) {
                            if (questionAnswers.answer.choices[k].choiceId === questionAnswers.question.choices[j].choiceId) {
                                isChosen = true;
                                break;
                            }
                        }
                        if (!isChosen) {
                            questionAnswers.answer.choices.push(
                            {
                                choice: questionAnswers.question.choices[j].choice,
                                choiceId: questionAnswers.question.choices[j].choiceId,
                                isChosen: false
                            });
                        }
                    }
                }
                else if (questionAnswers.question.isTimeQuestion) {
                    var hours = $filter('date')(questionAnswers.answer.timeAnswer, "HH");
                    var mins = $filter('date')(questionAnswers.answer.timeAnswer, "mm");
                    var timeAsDate = new Date();
                    timeAsDate.setUTCHours(hours);
                    timeAsDate.setUTCMinutes(mins);
                    questionAnswers.answer.timeAnswer = timeAsDate;
                }
                if (questionAnswers.question.isDateQuestion) {
                    questionAnswers.answer.dateAnswer = $filter('date')(questionAnswers.answer.dateAnswer, "dd MMMM yyyy");
                }
            }
        }

        function handleChoiceQuestionsOnLoading(theForm) {
            if (theForm.sections[0].questionAnswers) {
                for (var i = 0; i < theForm.sections[0].questionAnswers.length; i++) {
                    var questionAnswers = theForm.sections[0].questionAnswers[i];

                    if (questionAnswers.question.isDateQuestion) {
                        questionAnswers.answer.dateAnswer = $filter('date')(questionAnswers.answer.dateAnswer, "dd MMMM yyyy");
                    }

                    if (questionAnswers.question.isTimeQuestion) {
                        if (questionAnswers.answer.timeAnswer == null || questionAnswers.answer.timeAnswer == undefined)
                            questionAnswers.answer.timeAnswer = new Date();
                        else {
                            var m = moment(questionAnswers.answer.timeAnswer);
                            var hours = m.hours();
                            var mins = m.minutes();
                            var timeAsDate = new Date();
                            timeAsDate.setHours(hours);
                            timeAsDate.setMinutes(mins);
                            questionAnswers.answer.timeAnswer = timeAsDate;
                        }
                    }

                    if (!questionAnswers.answer.timeAnswer) {
                        questionAnswers.answer.timeAnswer = new Date();
                    }

                    if (questionAnswers.question.isChoiceQuestion) {
                        if (questionAnswers.answer.choices) {
                            for (var j = 0; j < questionAnswers.answer.choices.length; j++) {
                                if (questionAnswers.answer.choices[j].isChosen) {
                                    questionAnswers.answer.chosen = {
                                        choice: questionAnswers.answer.choices[j].choice,
                                        choiceId: questionAnswers.answer.choices[j].choiceId
                                    };
                                    break;
                                }
                            }
                        }
                    }
                }
                if (questionAnswers.question.isCheckListQuestion) {
                    questionAnswers.answer.chosen = [];
                    if (questionAnswers.answer.choices) {
                        for (var k = 0; k < questionAnswers.answer.choices.length; k++) {
                            if (questionAnswers.answer.choices[k].isChosen)
                                questionAnswers.answer.chosen.push(questionAnswers.answer.choices[k]);
                        }
                    }
                }
            }
        }


        function getQuestionAnswers(template) {
            var questionAnswers = [];
            //go through all the questions and create a question / answer pair
            for (var i = 0; i < template.sections[0].questions.length; i++) {
                questionAnswers.push({
                    question: template.sections[0].questions[i],
                    answer: {}
                });
            }
            return questionAnswers;
        }

        //create a new form from its template
        function createFormFromTemplate(template, formId, questionAnswers) {
            var form = {
                formType: template.formType,
                formTemplateId: template.id,
                name: template.name,
                title: template.title,
                description: template.description,
                iconUri: template.iconUri,
                backgroundColour: template.backgroundColour,
                fontColour: template.fontColour,
                highlightColour:template.highlightColour,
                sections: [
                    {
                        name: template.sections[0].name
                    }
                ],
                externalId: template.externalId,
                isFeedbackGivenAfterQuiz: template.isFeedbackGivenAfterQuiz,
                isFeedbackGivenDuringQuiz: template.isFeedbackGivenDuringQuiz,
                id: formId, //might be null
                //activity fields
                targetEntriesNumber: template.targetEntriesNumber,
                individualCanCreate: template.individualCanCreate,
                individualCanDelete: template.individualCanDelete,
                individualCanEdit: template.individualCanEdit,
                individualCanView: template.individualCanView
            };

            if(questionAnswers != null){
                form.sections[0].questionAnswers = questionAnswers;
            }else{
                form.sections[0].questionAnswers = getQuestionAnswers;
            }
            return form;
        }
    }

})();