from django.shortcuts import render
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_http_methods
from django.db.models import Count
from django.db.models.functions import TruncDate
from django.utils import timezone
from datetime import timedelta
import json

from .models import ClickEvent


def get_client_ip(request):
    x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
    if x_forwarded_for:
        ip = x_forwarded_for.split(',')[0].strip()
    else:
        ip = request.META.get('REMOTE_ADDR')
    return ip


@csrf_exempt
@require_http_methods(["POST"])
def track_bot_click(request):
    """Трекинг перехода в бота"""
    ClickEvent.objects.create(
        event_type='bot',
        ip_address=get_client_ip(request),
        user_agent=request.META.get('HTTP_USER_AGENT', ''),
        referrer=request.META.get('HTTP_REFERER'),
    )
    return JsonResponse({'status': 'ok', 'event': 'bot'})


@csrf_exempt
@require_http_methods(["POST"])
def track_channel_click(request):
    """Трекинг перехода в TG канал"""
    ClickEvent.objects.create(
        event_type='channel',
        ip_address=get_client_ip(request),
        user_agent=request.META.get('HTTP_USER_AGENT', ''),
        referrer=request.META.get('HTTP_REFERER'),
    )
    return JsonResponse({'status': 'ok', 'event': 'channel'})


def dashboard(request):
    """Страница статистики"""
    today = timezone.now().date()
    week_ago = today - timedelta(days=7)
    month_ago = today - timedelta(days=30)

    # Общая статистика
    total_bot = ClickEvent.objects.filter(event_type='bot').count()
    total_channel = ClickEvent.objects.filter(event_type='channel').count()

    # Статистика за сегодня
    today_bot = ClickEvent.objects.filter(
        event_type='bot',
        created_at__date=today
    ).count()
    today_channel = ClickEvent.objects.filter(
        event_type='channel',
        created_at__date=today
    ).count()

    # Статистика за неделю
    week_bot = ClickEvent.objects.filter(
        event_type='bot',
        created_at__date__gte=week_ago
    ).count()
    week_channel = ClickEvent.objects.filter(
        event_type='channel',
        created_at__date__gte=week_ago
    ).count()

    # Данные для графика (последние 30 дней)
    bot_by_day = ClickEvent.objects.filter(
        event_type='bot',
        created_at__date__gte=month_ago
    ).annotate(date=TruncDate('created_at')).values('date').annotate(
        count=Count('id')
    ).order_by('date')

    channel_by_day = ClickEvent.objects.filter(
        event_type='channel',
        created_at__date__gte=month_ago
    ).annotate(date=TruncDate('created_at')).values('date').annotate(
        count=Count('id')
    ).order_by('date')

    # Последние события
    recent_events = ClickEvent.objects.all()[:20]

    context = {
        'total_bot': total_bot,
        'total_channel': total_channel,
        'today_bot': today_bot,
        'today_channel': today_channel,
        'week_bot': week_bot,
        'week_channel': week_channel,
        'bot_by_day': json.dumps([
            {'date': item['date'].isoformat(), 'count': item['count']}
            for item in bot_by_day
        ]),
        'channel_by_day': json.dumps([
            {'date': item['date'].isoformat(), 'count': item['count']}
            for item in channel_by_day
        ]),
        'recent_events': recent_events,
    }

    return render(request, 'metrics/dashboard.html', context)