from django import forms
from django.contrib import admin, messages
import main.models as MainDB
from datetime import date, datetime
from django.utils.html import format_html
from import_export import resources
from import_export.admin import ExportMixin, ImportMixin, ImportExportModelAdmin

from django.core.mail import send_mail
from django.template.loader import render_to_string
from django.utils.html import strip_tags
from django.utils.timezone import now
from django.shortcuts import redirect
from django.urls import path
from django.utils.timezone import now
from datetime import timedelta

from .models import contributors

# Admin-Action für den Versand der E-Mail
def send_custom_email(modeladmin, request, queryset):
    for obj in queryset:
        subject = "Helfer - Regionalkongress 2025 "

        myVar = [role.name for role in obj.roles.all()]
        myVar = myVar[0] if len(myVar) > 0 else "Leer"
        html_message = render_to_string("main/email_invite.html", {"firstname": obj.firstname, 
                                                                    "year": obj.birthday.year if obj.birthday != None else "Leer", 
                                                                    "congr": obj.congregation.title if obj.congregation != None else "Leer", 
                                                                    "role": myVar})
        plain_message = strip_tags(html_message)
        from_email = '"Samuel Zielke" <rk-orga@samuelzielke.de>'
        recipient_list = [obj.email]

        try:
            send_mail(subject, plain_message, from_email, recipient_list, html_message=html_message)
            obj.email_sent_at = now()
            obj.save()
            messages.success(request, f"E-Mail an {obj.email} gesendet.")
        except Exception as e:
            messages.error(request, f"Fehler beim Senden der E-Mail an {obj.email}: {e}")

send_custom_email.short_description = "Einladungs E-Mail senden"

class contributorsResource(resources.ModelResource):

    class Meta:
        model = MainDB.contributors

# Register your models here.
@admin.register(MainDB.contributors)
# class DeinModellAdmin(ImportExportModelAdmin):
#     pass  # Damit hast du Import/Export-Funktionalität im Django Admin
class MainDB_contributorsAdmin(ExportMixin, ImportMixin, admin.ModelAdmin):

    resource_class = contributorsResource

    list_display = ('full_name', 'actual', 'get_emailstate', 'da_approval', 'leader', 'tage_anzeige', 'get_deparment', 'gender', 'birthday_year', 'get_congregation', 'mobilnumber', 'email')

    list_filter = ('gender', 'roles', 'deparment', 'da_approval', 'actual', 'email_sent_at')

    search_fields = ('name', 'firstname', 'congregation__title', 'deparment__title', 'mobilnumber', 'email', 'jwpub')

    actions = [send_custom_email]

    def get_emailstate(self, obj):
        if obj.email_sent_at != None:
            color = 'green'
            if obj.email_sent_at < now() - timedelta(days=30):
                color = 'gold'
        else:
            color = 'red'
        return format_html(f'<span style="color: {color}; font-size: 16px;">●</span>')
    get_emailstate.short_description = "E-Mail"
    get_emailstate.admin_order_field = "email_sent_at"
    
    def get_urls(self):
        urls = super().get_urls()
        custom_urls = [
            path('<path:object_id>/send_email/', self.admin_site.admin_view(self.send_email_view), name='send_email')
        ]
        return custom_urls + urls
    
    def send_email_view(self, request, object_id):
        obj = self.get_object(request, object_id)
        send_custom_email(self, request, [obj])
        return redirect(request.META.get('HTTP_REFERER', 'admin:index'))
    
    def email_button(self, obj):
        return f'<a class="button" href="send_email/">E-Mail senden</a>'
    email_button.allow_tags = True
    email_button.short_description = "E-Mail senden"
    
    def get_congregation(self, obj):
        return obj.congregation
    get_congregation.short_description = 'Versammlung'
    get_congregation.admin_order_field = 'congregation__title'

    def get_deparment(self, obj):
        # Gebe eine durch Komma getrennte Liste der Namen der contributors zurück
        return ", ".join([str(deparment) for deparment in obj.deparment.all()])
    get_deparment.short_description = 'Abteilung'  # Optional: Benennung der Spalte
    get_deparment.admin_order_field = 'deparment__title'

    # Methode, um nur das Jahr des Birthdays anzuzeigen
    def birthday_year(self, obj):
        year = obj.birthday.year if obj.birthday != None else 0
        return int(datetime.strftime(date.today(), "%Y")) - year
    birthday_year.short_description = 'Alter'
    birthday_year.admin_order_field = 'birthday'

    # Teamleiter ansicht
    def leader(self, obj):
        if obj.teamleader:
            color = "green"
        elif not obj.teamleader and obj.second_teamleader:
            color = "gold"
        else:
            color = "gray"

        status = f'<span style="color: {color}; font-size: 16px;">●</span>'
        return format_html(status)

    # Verfügbarkeit anzeigen
    def tage_anzeige(self, obj):
        """ Kompakte Anzeige mit 2er-Gruppen in farbigen Punkten """
        tage_pairs = [
            ("MiV", "MiN"),
            ("DoV", "DoN"),
            ("FrV", "FrN"),
            ("SaV", "SaN"),
            ("SoV", "SoN"),
            ("Abbau", None)  # Extra2 hat keinen Partner, wird einzeln bewertet
        ]

        symbols = []
        for tag1, tag2 in tage_pairs:
            active1 = obj.tage & obj.TAGE[tag1]
            active2 = obj.TAGE.get(tag2, 0) and obj.tage & obj.TAGE[tag2] if tag2 else None  # Sicherstellen, dass None nicht bewertet wird

            if tag2 is None:  # Falls nur ein Eintrag in der Gruppe existiert
                color = "green" if active1 else "red"  # Entweder Grün oder Rot
            else:
                if active1 and active2:
                    color = "green"  # 🟢 beide aktiv
                elif active1 or active2:
                    color = "gold"   # 🟡 nur einer aktiv
                else:
                    color = "red"    # 🔴 beide inaktiv

            symbols.append(f'<span style="color: {color}; font-size: 16px;">●</span>')

        return format_html(" ".join(symbols))
    tage_anzeige.admin_order_field = 'tage'


admin.site.register(MainDB.department)

@admin.register(MainDB.congregation)
class MainDB_congregationAdmin(admin.ModelAdmin):
    list_display = ('id', 'title')

admin.site.register(MainDB.role)