from django.db import models
from django.contrib import admin
from django.db.models.functions import Now, ExtractWeek
from django.utils.translation import gettext_lazy as _

# Create your models here.
class StudentAdmin(admin.ModelAdmin):
    list_display = ("name", "surname", "email")
    list_filter = []

class Student(models.Model):
    id = models.AutoField(
        primary_key=True
    )

    email = models.EmailField(
        null=False,
        db_index=True
    )

    name = models.CharField(
        null=False,
        max_length=32
    )

    surname = models.CharField(
        null=False,
        max_length=32
    )


class MissionType(models.TextChoices):
    OTHER = "OTHER", _("OTHER")
    HB = "HB", _("HB")
    PPL = "PPL", _("PPL")
    IR = "IR", _("IR")
    CPL = "CPL", _("CPL")
    FI = "FI", _("FI")
    PC = "PC", _("PC")
    CHK = "CHK", _("CHK_6M")

class MissionProfile(models.Model):
    
    id = models.AutoField(
        primary_key=True
    )

    mtype = models.CharField(
        null=False,
        default=MissionType.HB,
        choices=MissionType
    )

    mnum = models.PositiveSmallIntegerField(
        null=True,
        default=0
    )

    duration = models.DurationField(
        null=False
    )

    def __str__(self):
        if self.mtype is not MissionType.HB:
            return f"{self.mtype}_{self.mnum}"

class MissionProfileAdmin(admin.ModelAdmin):
    list_display = ("mtype", "mnum")

class WeekPreference(models.Model):
    id = models.BigAutoField(
        primary_key=True
    )

    week = models.PositiveSmallIntegerField(
        null=False,
        db_index=True,
        db_default=ExtractWeek(Now()) + 1 
    )

    student = models.ForeignKey(
        Student,
        null=False,
        db_index=True,
        on_delete=models.DO_NOTHING
    )


class Preference(models.Model):
    id = models.BigAutoField(
        primary_key=True
    )

    weekpref = models.ForeignKey(
        WeekPreference,
        null=False,
        on_delete=models.DO_NOTHING
    )

    mission = models.ForeignKey(
        MissionProfile,
        null=True,
        on_delete=models.DO_NOTHING
    )

    monday = models.BooleanField(
        default=True,
        null=False
    )

    tuesday = models.BooleanField(
        default=True,
        null=False
    )

    wednesday = models.BooleanField(
        default=True,
        null=False
    )

    thursday = models.BooleanField(
        default=True,
        null=False
    )

    saturday = models.BooleanField(
        default=True,
        null=False
    )

    sunday = models.BooleanField(
        default=True,
        null=False
    )