# coding=utf-8
import json
import traceback
from django.db.models import Sum, F
from rest_framework.decorators import action
from rest_framework.views import APIView
from django.db import transaction
from rest_framework.viewsets import ReadOnlyModelViewSet
from django.db.models import Q
from utils.custom_modelviewset import CustomModelViewSet
from utils import response_ok, response_error
from utils.permission import IsAdministrator
from utils.format import ExcelImporter
from apps.examination.examquestion.serializers import *
from apps.examination.examquestion.filters import *
from apps.system.models import SysLog
from apps.foundation.models import Subject, Chapter

class ExamQuestionViewSet(CustomModelViewSet):
    permission_classes = [IsAdministrator, ]
    queryset = ExamQuestion.objects.filter(delete=False)
    serializer_class = ExamQuestionSerializer

    def filter_queryset(self, queryset):
        queryset = queryset.filter()
        f = ExamQuestionFilter(self.request.GET, queryset=queryset)
        return f.qs

    def perform_create(self, serializer):
        super(ExamQuestionViewSet, self).perform_create(serializer)
        instance = serializer.instance
        validated_data = serializer.validated_data
        SysLog.objects.addnew(self.request.user, SysLog.INSERT, u'添加试题库试题，id=%d' % (instance.id), validated_data)

    def perform_update(self, serializer):
        super(ExamQuestionViewSet, self).perform_update(serializer)
        instance = serializer.instance
        validated_data = serializer.validated_data
        SysLog.objects.addnew(self.request.user, SysLog.UPDATE, u'修改试题库试题，id=%d' % (instance.id), validated_data)

        if 'feedback' in self.request.data and self.request.data['feedback']:
            feedback = ExamQuestionFeedback.getById(self.request.data['feedback'])
            feedback.process(self.request.user)
            feedback.save()
            SysLog.objects.addnew(self.request.user, SysLog.UPDATE, u'处理试题错误反馈，id=%d' % (feedback.id))

    def destroy(self, request, *args, **kwargs):
        with transaction.atomic():
            instance = self.get_object()
            instance.delete = True
            instance.save()
            SysLog.objects.addnew(request.user, SysLog.INSERT, u"删除试题库试题,id=%d" % instance.id)
        return response_ok()

    @action(methods=['post'], detail=False)
    def import_single(self, request):
        file = request.FILES.get('excel_file')
        status = ExcelImporter.validity(file)
        if not status['success']:
            return response_error(status['errors'])

        data = status['data']
        question_count = 0
        line = 2
        try:
            with transaction.atomic():
                cur_question = None
                for row in data:
                    title = row['试题内容']
                    subject = row['科目']
                    chapter = row['章节']
                    difficulty_text = row['难度']
                    scores= row['分数']
                    analysis = row['解析']
                    content = row['选项']
                    right = row['正确答案']

                    if title and content:
                        raise CustomError(u'第%d行：数据格式不正确' % line)
                    if title and not content:
                        if not subject:
                            raise CustomError(u'第%d行：科目不能为空' % line)
                        if not chapter:
                            raise CustomError(u'第%d行：章节不能为空' % line)
                        if not difficulty_text:
                            raise CustomError(u'第%d行：难度不能为空' % line)
                        if not scores:
                            raise CustomError(u'第%d行：分数不能为空' % line)

                        if difficulty_text == u'简单':
                            difficulty = ExamQuestion.SIMPLE
                        elif difficulty_text == u'中等':
                            difficulty = ExamQuestion.MID
                        elif difficulty_text == u'困难':
                            difficulty = ExamQuestion.HARD
                        else:
                            raise CustomError(u'第%d行：难度为无效数据' % line)

                        subject = Subject.objects.filter(name=subject, delete=False).first()
                        if not subject:
                            raise CustomError(u'第%d行：科目为无效数据' % line)
                        chapter = Chapter.objects.filter(subject=subject, name=chapter, delete=False).first()
                        if not chapter:
                            raise CustomError(u'第%d行：章节为无效数据' % line)
                        try:
                            scores = int(scores)
                        except:
                            raise CustomError(u'第%d行：分数为无效数据' % line)

                        cur_question = ExamQuestion.objects.create(
                            chapter=chapter,
                            type=ExamQuestion.SINGLE,
                            difficulty=difficulty,
                            scores=scores,
                            title=title,
                            analysis=analysis,
                            create_user=request.user,
                            create_time=timezone.now()
                        )
                        question_count += 1
                    if content and not title:
                        if not cur_question:
                            continue
                        if right:
                            ExamQuestionOption.objects.create(main=cur_question, content=content, right=True)
                        else:
                            ExamQuestionOption.objects.create(main=cur_question, content=content)

                    line += 1
                SysLog.objects.addnew(request.user, SysLog.IMPORT, u"导入[%d]道单选题" % (question_count))
        except CustomError as e:
            return response_error(e.get_error_msg())
        except Exception as e:
            traceback.print_exc()
            return response_error(str(e))
        return response_ok()

    @action(methods=['post'], detail=False)
    def import_multiple(self, request):
        file = request.FILES.get('excel_file')
        status = ExcelImporter.validity(file)
        if not status['success']:
            return response_error(status['errors'])

        data = status['data']
        question_count = 0
        line = 2
        try:
            with transaction.atomic():
                cur_question = None
                for row in data:
                    title = row['试题内容']
                    subject = row['科目']
                    chapter = row['章节']
                    difficulty_text = row['难度']
                    scores = row['分数']
                    analysis = row['解析']
                    content = row['选项']
                    right = row['正确答案']

                    if title and content:
                        raise CustomError(u'第%d行：数据格式不正确' % line)
                    if title and not content:
                        if not subject:
                            raise CustomError(u'第%d行：科目不能为空' % line)
                        if not chapter:
                            raise CustomError(u'第%d行：章节不能为空' % line)
                        if not difficulty_text:
                            raise CustomError(u'第%d行：难度不能为空' % line)
                        if not scores:
                            raise CustomError(u'第%d行：分数不能为空' % line)

                        if difficulty_text == u'简单':
                            difficulty = ExamQuestion.SIMPLE
                        elif difficulty_text == u'中等':
                            difficulty = ExamQuestion.MID
                        elif difficulty_text == u'困难':
                            difficulty = ExamQuestion.HARD
                        else:
                            raise CustomError(u'第%d行：难度为无效数据' % line)

                        subject = Subject.objects.filter(name=subject, delete=False).first()
                        if not subject:
                            raise CustomError(u'第%d行：科目为无效数据' % line)
                        chapter = Chapter.objects.filter(subject=subject, name=chapter, delete=False).first()
                        if not chapter:
                            raise CustomError(u'第%d行：章节为无效数据' % line)
                        try:
                            scores = int(scores)
                        except:
                            raise CustomError(u'第%d行：分数为无效数据' % line)

                        cur_question = ExamQuestion.objects.create(
                            chapter=chapter,
                            type=ExamQuestion.MULTIPLE,
                            difficulty=difficulty,
                            scores=scores,
                            title=title,
                            analysis=analysis,
                            create_user=request.user,
                            create_time=timezone.now()
                        )
                        question_count += 1
                    if content and not title:
                        if not cur_question:
                            continue
                        if right:
                            ExamQuestionOption.objects.create(main=cur_question, content=content, right=True)
                        else:
                            ExamQuestionOption.objects.create(main=cur_question, content=content)

                    line += 1
                SysLog.objects.addnew(request.user, SysLog.IMPORT, u"导入[%d]道多选题" % (question_count))
        except CustomError as e:
            return response_error(e.get_error_msg())
        except Exception as e:
            traceback.print_exc()
            return response_error(str(e))
        return response_ok()

    @action(methods=['post'], detail=False)
    def import_fill(self, request):
        file = request.FILES.get('excel_file')
        status = ExcelImporter.validity(file)
        if not status['success']:
            return response_error(status['errors'])

        data = status['data']
        question_count = 0
        line = 2
        try:
            with transaction.atomic():
                cur_question = None
                order = 0
                for row in data:
                    title = row['试题内容']
                    subject = row['科目']
                    chapter = row['章节']
                    difficulty_text = row['难度']
                    scores = row['分数']
                    analysis = row['解析']
                    content = row['答案']

                    if title and not content:
                        raise CustomError(u'第%d行：答案不能为空' % line)
                    if title and content:
                        if not subject:
                            raise CustomError(u'第%d行：科目不能为空' % line)
                        if not chapter:
                            raise CustomError(u'第%d行：章节不能为空' % line)
                        if not difficulty_text:
                            raise CustomError(u'第%d行：难度不能为空' % line)
                        if not scores:
                            raise CustomError(u'第%d行：分数不能为空' % line)

                        if difficulty_text == u'简单':
                            difficulty = ExamQuestion.SIMPLE
                        elif difficulty_text == u'中等':
                            difficulty = ExamQuestion.MID
                        elif difficulty_text == u'困难':
                            difficulty = ExamQuestion.HARD
                        else:
                            raise CustomError(u'第%d行：难度为无效数据' % line)

                        subject = Subject.objects.filter(name=subject, delete=False).first()
                        if not subject:
                            raise CustomError(u'第%d行：科目为无效数据' % line)
                        chapter = Chapter.objects.filter(subject=subject, name=chapter, delete=False).first()
                        if not chapter:
                            raise CustomError(u'第%d行：章节为无效数据' % line)
                        try:
                            scores = int(scores)
                        except:
                            raise CustomError(u'第%d行：分数为无效数据' % line)

                        order = 1
                        cur_question = ExamQuestion.objects.create(
                            chapter=chapter,
                            type=ExamQuestion.FILL,
                            difficulty=difficulty,
                            scores=scores,
                            title=title,
                            analysis=analysis,
                            create_user=request.user,
                            create_time=timezone.now()
                        )
                        ExamQuestionFill.objects.create(main=cur_question, content=content, order=order)
                        question_count += 1
                        order += 1
                    if content and not title:
                        if (not cur_question) or (not order):
                            continue
                        ExamQuestionFill.objects.create(main=cur_question, content=content, order=order)
                        order += 1

                    line += 1
                SysLog.objects.addnew(request.user, SysLog.IMPORT, u"导入[%d]道填空题" % (question_count))
        except CustomError as e:
            return response_error(e.get_error_msg())
        except Exception as e:
            traceback.print_exc()
            return response_error(str(e))
        return response_ok()

    @action(methods=['post'], detail=False)
    def import_judgment(self, request):
        file = request.FILES.get('excel_file')
        status = ExcelImporter.validity(file)
        if not status['success']:
            return response_error(status['errors'])

        data = status['data']
        line = 2
        try:
            with transaction.atomic():
                for row in data:
                    title = row['试题内容']
                    subject = row['科目']
                    chapter = row['章节']
                    difficulty_text = row['难度']
                    scores = row['分数']
                    analysis = row['解析']
                    judgment_text = row['答案']

                    if not title:
                        raise CustomError(u'第%d行：试题内容不能为空' % line)
                    if not subject:
                        raise CustomError(u'第%d行：科目不能为空' % line)
                    if not chapter:
                        raise CustomError(u'第%d行：章节不能为空' % line)
                    if not difficulty_text:
                        raise CustomError(u'第%d行：难度不能为空' % line)
                    if not scores:
                        raise CustomError(u'第%d行：分数不能为空' % line)
                    if not judgment_text:
                        raise CustomError(u'第%d行：答案不能为空' % line)

                    if difficulty_text == u'简单':
                        difficulty = ExamQuestion.SIMPLE
                    elif difficulty_text == u'中等':
                        difficulty = ExamQuestion.MID
                    elif difficulty_text == u'困难':
                        difficulty = ExamQuestion.HARD
                    else:
                        raise CustomError(u'第%d行：难度为无效数据' % line)

                    if judgment_text == u'正确':
                        judgment = True
                    elif judgment_text == u'错误':
                        judgment = False
                    else:
                        raise CustomError(u'第%d行：答案为无效数据' % line)

                    subject = Subject.objects.filter(name=subject, delete=False).first()
                    if not subject:
                        raise CustomError(u'第%d行：科目为无效数据' % line)
                    chapter = Chapter.objects.filter(subject=subject, name=chapter, delete=False).first()
                    if not chapter:
                        raise CustomError(u'第%d行：章节为无效数据' % line)
                    try:
                        scores = int(scores)
                    except:
                        raise CustomError(u'第%d行：分数为无效数据' % line)

                    ExamQuestion.objects.create(
                        chapter=chapter,
                        type=ExamQuestion.JUDGMENT,
                        difficulty=difficulty,
                        scores=scores,
                        title=title,
                        judgment=judgment,
                        analysis=analysis,
                        create_user=request.user,
                        create_time=timezone.now()
                    )

                    line += 1
                SysLog.objects.addnew(request.user, SysLog.IMPORT, u"导入[%d]道判断题" % (line - 2))
        except CustomError as e:
            return response_error(e.get_error_msg())
        except Exception as e:
            traceback.print_exc()
            return response_error(str(e))
        return response_ok()

class ExamQuestionFeedbackViewSet(ReadOnlyModelViewSet):
    permission_classes = [IsAdministrator, ]
    queryset = ExamQuestionFeedback.objects.filter().order_by('status', '-id')
    serializer_class = ExamQuestionFeedbackSerializer

    def filter_queryset(self, queryset):
        f = ExamQuestionFeedbackFilter(self.request.GET, queryset=queryset)
        return f.qs