from django.contrib import admin
from django.db.models import Q
from .models import Teacher
from course.models import CourseTeacher
from status.models import Status
from departments.models import Department


class CourseTeacherInline(admin.TabularInline):
    model = CourseTeacher
    extra = 1


@admin.register(Teacher)
class TeacherAdmin(admin.ModelAdmin):
    list_display = ('first_name', 'last_name', 'code', 'email', 'phone', 'department', 'status', 'hire_date')
    prepopulated_fields = {'slug': ('first_name', 'last_name')}
    list_filter = ('department', 'status', 'hire_date')
    search_fields = ('first_name', 'last_name', 'email', 'phone', 'code')
    inlines = [CourseTeacherInline]

    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == 'department':
            kwargs['queryset'] = Department.objects.filter(
                Q(is_global=True) | Q(organization__isnull=False)
            )
        elif db_field.name == 'status':
            kwargs['queryset'] = Status.objects.filter(
                Q(type='teacher') & (Q(is_global=True) | Q(organization__isnull=False))
            )
        return super().formfield_for_foreignkey(db_field, request, **kwargs)