from django.db import models
from django.utils.translation import gettext_lazy as _

from vbv_lernwelt.duedate.models import DueDate


class CourseSessionAttendanceCourse(models.Model):
    """
    Präsenzkurs Durchührung

    Kann über einen Zeitraum von meheren Tagen gehen.
    """
    course_session = models.ForeignKey(
        "course.CourseSession",
        on_delete=models.CASCADE,
    )
    learning_content = models.ForeignKey(
        "learnpath.LearningContentAttendanceCourse",
        on_delete=models.CASCADE,
    )
    due_date = models.OneToOneField(
        "duedate.DueDate",
        on_delete=models.CASCADE,
        related_name="attendance_course_due_date",
    )

    location = models.CharField(max_length=255, blank=True, default="")
    trainer = models.CharField(max_length=255, blank=True, default="")

    def save(self, *args, **kwargs):
        if not self.pk:
            title = ""
            page = None
            if self.learning_content_id:
                title = self.learning_content.title
                page = self.learning_content.page_ptr

            self.due_date = DueDate.objects.create(
                title=f"{title} {_('Präsenzkurs')}",
                course_session=self.course_session,
                page=page)
        super().save(*args, **kwargs)

    def __str__(self):
        return f"{self.course_session} - {self.learning_content}"


class CourseSessionAssignment(models.Model):
    """
    Auftrag
    - Geletitete Fallarbeit ist eine speziefische ausprägung eines Auftrags (assignment_type)

    """
    course_session = models.ForeignKey(
        "course.CourseSession",
        on_delete=models.CASCADE,
    )
    learning_content = models.ForeignKey(
        "learnpath.LearningContentAssignment",
        on_delete=models.CASCADE,
    )
    submission_deadline = models.OneToOneField(
        "duedate.DueDate",
        on_delete=models.CASCADE,
        related_name="assignment_submission_deadline",
    )

    evaluation_deadline = models.OneToOneField(
        "duedate.DueDate",
        on_delete=models.CASCADE,
        related_name="assignment_evaluation_deadline",
    )

    def save(self, *args, **kwargs):
        if not self.pk:
            title = ""
            page = None
            if self.learning_content_id:
                title = self.learning_content.title
                page = self.learning_content.page_ptr

            self.submission_deadline = DueDate.objects.create(
                title=f"{title} {_('Submission Deadline')}",
                course_session=self.course_session,
                page=page)

            self.evaluation_deadline = DueDate.objects.create(
                title=f"{title} {_('Evaluation Deadline')}",
                course_session=self.course_session,
                page=page)
        super().save(*args, **kwargs)

    def __str__(self):
        return f"{self.course_session} - {self.learning_content}"