"use strict";

angular.module("vocabulary")
    .service("memberWordService", ["HttpStatus", "MessageBox", "messageHandler", "memberWordApi", "lessonService", "$q", function (HttpStatus, MessageBox, messageHandler, memberWordApi, lessonService, $q) {

        var wordRegex = /^[-.a-zA-Z\d ]+$/;
        var generalRegex = /^[-.a-zA-Z\d ?!<>,^&`$%'"*;+:()_[]+$/;
        var blankRegex = /(<blank>)/;
        var blankAndGeneralRegex = /^[-.a-zA-Z\d ?!<>,^&`$%'"*;+:()_[]*(<blank>)+[-.a-zA-Z\d ?!<>,^&`$%'"*;+:()_[]*$/;

        function getRegex() {
            return {word: wordRegex, general: generalRegex, blankAndGeneralRegex: blankAndGeneralRegex};
        }

        function stringContainsBlank(text) {
            return blankRegex.test(text);
        }

        function stringContainsValidCharacters(text) {
            return generalRegex.test(text);
        }

        function getMemberWords() {
            return memberWordApi.get();
        }

        function getMemberWord(wordId) {
            return memberWordApi.getById(wordId);
        }

        function deleteWord(word) {
            return confirmDelete()
                .then(function () {
                    return memberWordApi.deleteWord(word.wordId)
                        .then(function () {
                            lessonService.discardWord(word);
                            var message = "Your word has been deleted.";
                            messageHandler.publishSuccess(message);
                        })
                        .catch(function () {
                            var message = "There was an error.";
                            messageHandler.publishError(message);
                        });
                });
        }

        function updateWord(word) {
            var wordCopy = angular.copy(word);
            return memberWordApi.updateWord(formatWord(wordCopy))
                .then(function () {
                    lessonService.replaceWordIfChosen(word);
                    var message = "Your word has been saved.";
                    messageHandler.publishSuccess(message)
                })
                .catch(function (response) {
                    var message = response.status === HttpStatus.CONFLICT ? "You have already created a word by this name." : "There was an error.";
                    messageHandler.publishError(message);
                });
        }

        function createWord(word) {
            var wordCopy = angular.copy(word);
            return memberWordApi.createWord(formatWord(wordCopy))
                .then(lessonService.toggleChosenWord)
                .then(function () {
                    var message = "Your word has been created.";
                    messageHandler.publishSuccess(message);
                })
                .catch(function (response) {
                    var message = response.status === HttpStatus.CONFLICT ? "You have already created a word by this name." : "There was an error.";
                    messageHandler.publishError(message);
                });
        }

        function attemptWordUpdate(word) {
            return validateWord(word)
                .then(function() {
                    return updateWord(word);
                });
        }

        function attemptWordCreation(word) {
            return validateWord(word)
                .then(function() {
                    return createWord(word);
                });
        }

        function confirmDelete() {
            var message = "Are you sure you want to delete this word?";
            return MessageBox.show({
                message: message,
                responses: [{subtle: true, action: false, label: 'Cancel'}, {action: true, label: 'Delete Word'}]
            }).then(function(response){
                if(!response || !response.action){
                    throw "Delete Aborted";
                }
            });
        }

        function formatWord(word) {
            var assessment = word.assessmentQuestionsAndAnswers[0];
            var correctAnswerIndex = assessment.correctAnswerIndex.toString();
            word.partOfSpeech = word.partOfSpeechFull.slice();
            assessment.question = assessment.question.slice();
            assessment.answers[correctAnswerIndex].isCorrect = true;
            return word;
        }

        function validateWord(word) {
            var isValid = true;
            if (!word.wordName || word.wordName.length > 30 || !wordRegex.test(word.wordName)) {
                isValid = false;
            }
            if (!word.partOfSpeechFull) {
                isValid = false;
            }
            if (!word.definition || word.definition.length > 255 || !generalRegex.test(word.definition)) {
                isValid = false;
            }
            if (!word.sentenceStarter || word.sentenceStarter.length > 255 || !generalRegex.test(word.sentenceStarter) || !blankRegex.test(word.sentenceStarter)) {
                isValid = false;
            }
            if (!word.clozeSentence || word.clozeSentence.length > 255 || !generalRegex.test(word.clozeSentence) || !blankRegex.test(word.clozeSentence)) {
                isValid = false;
            }
            if ((!word.contextSentences[0].text || word.contextSentences[0].text.length > 255 || !generalRegex.test(word.contextSentences[0].text)) ||
                (word.contextSentences[1].text && (word.contextSentences[1].text.length > 255 || !generalRegex.test(word.contextSentences[1].text))) ||
                (word.contextSentences[2].text && (word.contextSentences[2].text.length > 255 || !generalRegex.test(word.contextSentences[2].text)))) {
                isValid = false;
            }
            if (!word.assessmentQuestionsAndAnswers[0].question ||
                    word.assessmentQuestionsAndAnswers[0].question.length > 100 ||
                    !generalRegex.test(word.assessmentQuestionsAndAnswers[0].question) ||
                    !blankRegex.test(word.assessmentQuestionsAndAnswers[0].question)) {
                isValid = false;
            }
            if (!word.assessmentQuestionsAndAnswers[0].answers[0].text || word.assessmentQuestionsAndAnswers[0].answers[0].length > 40 ||
                !word.assessmentQuestionsAndAnswers[0].answers[1].text || word.assessmentQuestionsAndAnswers[0].answers[1].length > 40 ||
                !word.assessmentQuestionsAndAnswers[0].answers[2].text || word.assessmentQuestionsAndAnswers[0].answers[2].length > 40) {
                isValid = false;
            }
            if (word.assessmentQuestionsAndAnswers[0].correctAnswerIndex === null) {
                isValid = false;
            }

            if (!isValid) {
                return $q.reject("INVALID WORD");
            }
            return $q.resolve();
        }

        function isMemberWord(word) {
            return !word.hasOwnProperty('topicId');
        }

        function wordHasCorrectAnswerSet(word) {
            return word.assessmentQuestionsAndAnswers[0].correctAnswerIndex != null;
        }

        return {
            stringContainsBlank: stringContainsBlank,
            stringContainsValidCharacters: stringContainsValidCharacters,
            getMemberWords: getMemberWords,
            getMemberWord: getMemberWord,
            attemptWordUpdate: attemptWordUpdate,
            attemptWordCreation: attemptWordCreation,
            deleteWord: deleteWord,
            getRegex: getRegex,
            isMemberWord: isMemberWord,
            wordHasCorrectAnswerSet: wordHasCorrectAnswerSet
        };
    }]);