from django.db import models

DEGREE_CHOICES = [
    ('學士生', '學士生'),
    ('碩士生', '碩士生'),
    ('博士生', '博士生'),
]

CATEGORY_CHOICES = [
    ('一般生', '一般生'),
    ('在職生', '在職生'),
    ('交換中', '交換中'),
]

class Student(models.Model):
    student_id = models.CharField(max_length=10, primary_key=True)
    name = models.CharField(max_length=255)
    degree_type = models.CharField(max_length=10, choices=DEGREE_CHOICES, default='碩士生', verbose_name='學位類別')
    student_category = models.CharField(max_length=10, choices=CATEGORY_CHOICES, default='一般生', verbose_name='身分類別')
    grade = models.IntegerField(null=True, blank=True)
    hope_admission_scheme = models.BooleanField(default=False, null=True, blank=True)
    tuition_waiver = models.BooleanField(default=False, null=True, blank=True)
    financial_assistance_disadvantaged_students = models.BooleanField(default=False, null=True, blank=True)
    loan = models.IntegerField(null=True, blank=True, default=0)
    email = models.EmailField(null=True, blank=True, verbose_name='主要 Email')
    email2 = models.EmailField(null=True, blank=True, verbose_name='第二 Email')
    is_active = models.BooleanField(default=True)

    def __str__(self):
        return f"{self.name} ({self.degree_type} / {self.student_category})"

class PointRecord(models.Model):
    student = models.ForeignKey(Student, on_delete=models.CASCADE)
    datetime = models.DateTimeField(auto_now_add=True)  # Combined date and time field

    class Meta:
        verbose_name = 'point record'
        verbose_name_plural = 'point records'

    def __str__(self):
        return f"{self.datetime} - {self.student}"

class WeeklySchedule(models.Model):
    student = models.ForeignKey(Student, on_delete=models.CASCADE, related_name='schedules')
    date = models.DateField(verbose_name='週會日期')
    year = models.IntegerField(verbose_name='年份')
    month = models.IntegerField(verbose_name='月份')

    class Meta:
        unique_together = ('student', 'date')
        verbose_name = '週會排程'
        verbose_name_plural = '週會排程'

    def save(self, *args, **kwargs):
        if self.date:
            self.year = self.date.year
            self.month = self.date.month
        super().save(*args, **kwargs)

    def __str__(self):
        return f"{self.date} - {self.student.name} ({self.student.student_id})"