from django import forms
from django.db.models.query import QuerySet
from django.http import HttpRequest, HttpResponse
from django.contrib import admin
from django.contrib import messages
from django.utils.translation import ngettext
from django.utils.safestring import SafeText
from durationwidget.widgets import TimeDurationWidget 
from datetime import date

import nested_admin

from .models.courses import Course
from .models.hourbuildings import HourBuilding, HourBuildingLeg
from .models.missions import Training, MissionProfile
from .models.students import Student
from .models.weekpref import WeekPreference

from .custom.colortag import course_color
from .custom.defpassword import default_password

from .actions.exportweek import export_selected

class TrainingForm(forms.ModelForm):
    model=Training
    
class HourBuildingLegForm(forms.ModelForm):
    class Meta:
        model = HourBuildingLeg
        fields = '__all__'
        widgets = {
            'time': TimeDurationWidget(show_days=False, 
                                       show_seconds=False
            )
        }

# Register your models here.
class HourBuildingLegInline(nested_admin.NestedTabularInline):
    model = HourBuildingLeg
    form = HourBuildingLegForm
    extra = 0
    fk_name = 'hb'
    max_num = 5

class HourBuildingInLine(nested_admin.NestedTabularInline):
    model = HourBuilding
    extra = 0
    inlines = [HourBuildingLegInline]
    fk_name = 'weekpref'
    verbose_name_plural = "Hour Building"
    max_num = 7

class TrainingInLIne(nested_admin.NestedTabularInline):
    model = Training
    form = TrainingForm
    extra = 0
    fk_name = 'weekpref'
    verbose_name_plural = "Training Missions"
    max_num = 7
    
class WeekPreferenceAdmin(nested_admin.NestedModelAdmin):
    inlines = (TrainingInLIne, HourBuildingInLine,)
    list_display = ("week", "student__name", "student__surname", "student__course", "course_color", "student_brief_mix",)
    list_filter = ("week", "student__course", "student",)
    actions = ("export",)

    @admin.action(description="Export Selected Preferences")
    def export(weekpreferenceadmin, request: HttpRequest, queryset: QuerySet[WeekPreference]) -> HttpResponse | None:
        if queryset.count() == 0:
            return None
        weekpreferenceadmin.message_user(request, ngettext("Exporting %d row", "Exporting %d rows", queryset.count()) % queryset.count(), messages.SUCCESS)
        return export_selected(request=request, queryset=queryset)       
        
    @admin.display(description="Mission Count")
    def student_brief_mix(self, obj: WeekPreference) -> SafeText:
        if not obj.student.course:
            return SafeText("")
        return SafeText(f"{Training.objects.filter(weekpref = obj.id).count()}")

    @admin.display(description="Color")
    def course_color(self, obj: WeekPreference) -> SafeText:
        if not obj.student.course:
            return SafeText("")
        return course_color(obj.student.course.color)

    def has_module_permission(self, request):
        if hasattr(request.user, 'student'):
            return False
        return True

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        # If a user is registered as student show only their preferences
        if hasattr(request.user, 'student'):
            return qs.filter(student=request.user.student)
        # If admin show everything
        return qs

    def get_form(self, request, obj=None, **kwargs):
        form: forms.Form = super().get_form(request, obj, **kwargs)

        # If student is current user making request
        if hasattr(request.user, 'student'):
            student = request.user.student
            if 'student' in form.base_fields:
                form.base_fields['student'].initial = student
                form.base_fields['student'].disabled = True
                form.base_fields['week'].disabled = True

        # If form contains the week field
        if 'week' in form.base_fields:
            # Set default value as current week
            current_week = date.today().isocalendar().week
            form.base_fields['week'].initial = current_week
        return form
    
    def save_model(self, request, obj, form, change):
        # Imposta automaticamente lo studente se non è già valorizzato
        if hasattr(request.user, 'student') and not obj.student_id:
            obj.student = request.user.student
        super().save_model(request, obj, form, change)

class StudentAdmin(admin.ModelAdmin):
    list_display = ("surname", "name", "course", "course_color", "email", "phone", "password", "active")
    list_filter = ("course", "active")
    actions = ("disable_students",)

    @admin.display(description="Color")
    def course_color(self, obj: Student) -> SafeText:
        if not obj.course:
            return SafeText("")
        return course_color(obj.course.color)

    @admin.display(description="Password")
    def password(self, obj: Student) -> SafeText:
        return SafeText(default_password(student=obj))
    
    @admin.action(description="Disable Students")
    def disable_students(modeladmin, request: HttpRequest, queryset: QuerySet[Student]):
        queryset.update(active = False)
        pass
        
class CourseAdmin(admin.ModelAdmin):
    list_display = ("ctype", "cnumber","color_display", "year")
    list_filter = ("ctype", "year")
    
    # Dinamically add color_display property to show a colored dot
    @admin.display(description="Color")
    def color_display(self, obj: Course) -> SafeText:
        if not obj.pk:
            return SafeText("")
        return course_color(obj.color)

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

admin.site.register(Course, CourseAdmin)
admin.site.register(MissionProfile, MissionProfileAdmin)
admin.site.register(Student, StudentAdmin)
admin.site.register(WeekPreference, WeekPreferenceAdmin)