# views/dashboard.py
# Phase 0: Vision 2026 – Code-Refactoring

import csv
import io
import json
import os
import time
from datetime import datetime, timedelta, date
from decimal import Decimal

import qrcode
import qrcode.image.svg
import requests
from django.conf import settings
from django.contrib import messages
from django.contrib.auth.decorators import login_required
from django.core.paginator import Paginator
from django.db.models import (Avg, Count, DecimalField, F, IntegerField, Q,
                              Sum, Value)
from django.db.models.functions import Cast, Coalesce, NullIf, Replace
from django.http import HttpResponse, JsonResponse
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse
from django.utils import timezone
from django.views.decorators.csrf import csrf_exempt
from django_otp.decorators import otp_required
from django_otp.plugins.otp_totp.models import TOTPDevice
from django_otp.plugins.otp_static.models import StaticDevice, StaticToken
from django_otp.util import random_hex
from rest_framework.decorators import api_view
from rest_framework.response import Response

from stiftung.models import (AppConfiguration, AuditLog, BackupJob, BankTransaction,
                     BriefVorlage, CSVImport, Destinataer,
                     DestinataerEmailEingang, DestinataerNotiz,
                     DestinataerUnterstuetzung,
                     DokumentLink, Foerderung, GeschichteBild, GeschichteSeite,
                     Land, LandAbrechnung, LandVerpachtung, Paechter, Person,
                     Rentmeister, StiftungsKalenderEintrag, StiftungsKonto,
                     UnterstuetzungWiederkehrend, Veranstaltung,
                     Veranstaltungsteilnehmer, Verwaltungskosten,
                     VierteljahresNachweis)
from stiftung.forms import (
    DestinataerForm, DestinataerUnterstuetzungForm, DestinataerNotizForm,
    FoerderungForm, GeschichteBildForm, GeschichteSeiteForm,
    LandForm, LandVerpachtungForm, LandAbrechnungForm,
    PaechterForm, DokumentLinkForm,
    RentmeisterForm, StiftungsKontoForm, VerwaltungskostenForm,
    BankTransactionForm, BankImportForm,
    UnterstuetzungForm, UnterstuetzungWiederkehrendForm,
    UnterstuetzungMarkAsPaidForm, VierteljahresNachweisForm,
    UserCreationForm, UserUpdateForm, PasswordChangeForm, UserPermissionForm,
    TwoFactorSetupForm, TwoFactorVerifyForm, TwoFactorDisableForm,
    BackupTokenRegenerateForm, PersonForm,
    VeranstaltungForm, VeranstaltungsteilnehmerForm,
)


@login_required
def home(request):
    """Home page for the Stiftungsverwaltung application"""
    from stiftung.services.calendar_service import StiftungsKalenderService
    
    # Get upcoming events for the calendar widget
    calendar_service = StiftungsKalenderService()
    
    # Get all events for the next 14 days
    from datetime import timedelta
    today = timezone.now().date()
    end_date = today + timedelta(days=14)
    all_events = calendar_service.get_all_events(today, end_date)
    
    # Filter for upcoming and overdue
    upcoming_events = [e for e in all_events if not getattr(e, 'overdue', False)]
    overdue_events = [e for e in all_events if getattr(e, 'overdue', False)]
    
    # Get current month events for mini calendar
    from calendar import monthrange
    _, last_day = monthrange(today.year, today.month)
    month_start = today.replace(day=1)
    month_end = today.replace(day=last_day)
    current_month_events = calendar_service.get_all_events(month_start, month_end)
    
    context = {
        "title": "Stiftungsverwaltung", 
        "description": "Foundation Management System",
        "upcoming_events": upcoming_events[:5],  # Show only 5 upcoming events
        "overdue_events": overdue_events[:3],    # Show only 3 overdue events
        "current_month_events": current_month_events,
        "today": today,
    }
    
    return render(request, "stiftung/home.html", context)


@api_view(["GET"])
def health_check(request):
    """Simple health check endpoint for deployment monitoring"""
    return JsonResponse(
        {
            "status": "healthy",
            "timestamp": timezone.now().isoformat(),
            "service": "stiftung-web",
        }
    )


## Removed duplicate paperless_ping referencing non-existent PAPERLESS_URL


# CSV Import Views
@api_view(["GET"])
def health(_request):
    return Response({"status": "ok"})