from django.db import models
from django.db.models import F, Window
from django.db.models.functions import Rank
from django.utils.translation import gettext_lazy as _

from apps.account.models import User


class QuizParticipant(models.Model):
    quiz = models.ForeignKey('quiz.Quiz', on_delete=models.CASCADE, related_name='participants', verbose_name=_('Quiz'))
    user = models.ForeignKey('account.User', on_delete=models.CASCADE, verbose_name=_('User'), related_name='uquizzes')
    started_at = models.DateTimeField(verbose_name=_('Started At'))
    ended_at = models.DateTimeField(verbose_name=_('Ended At'))
    total_timing = models.PositiveIntegerField(verbose_name=_('Total Timing'), help_text=_('Seconds take to finish the quiz'))

    question_score = models.PositiveIntegerField(verbose_name=_('Question Score'))
    timing_score = models.PositiveIntegerField(verbose_name=_('Timing Score'))
    total_score = models.PositiveIntegerField(verbose_name=_('Total Score'))

    class Meta:
        verbose_name = _("Participant")
        verbose_name_plural = _("Participants")
        ordering = ("-id",)

    def __str__(self):
        return f"Participant: {self.id}, ParticipantName: {self.user}, Quiz: {self.quiz.id}"

    def __repr__(self):
        return f"Participant(id={self.id})"


    @staticmethod
    def get_user_ranks(quiz_id):
        return QuizParticipant.objects.filter(quiz_id=quiz_id).annotate(
            rank=Window(
                expression=Rank(),
                order_by=F('total_score').desc()
            )
        )


class ParticipantAnswer(models.Model):
    CHOICES = [
        (1, _('Option 1')),
        (2, _('Option 2')),
        (3, _('Option 3')),
        (4, _('Option 4')),
    ]

    participant = models.ForeignKey(QuizParticipant, on_delete=models.CASCADE, related_name='answers', verbose_name=_('Participant'))
    question = models.ForeignKey("quiz.Question", on_delete=models.CASCADE, verbose_name=_('Question'))
    option_num = models.PositiveSmallIntegerField(choices=CHOICES, verbose_name=_('Selected Option'))
    at_time = models.DateTimeField(verbose_name=_('At Time'))
    answer_timing = models.PositiveSmallIntegerField(default=0, verbose_name=_('Seconds Take to Answer'))


    class Meta:
        verbose_name = _("User Quiz Answer")
        verbose_name_plural = _("User Quiz Answers")
        ordering = ("-id",)

    def __str__(self):
        return f"Participant Answer: {self.id}"

    def __repr__(self):
        return f"ParticipantAnswer(id={self.id})"