"""
Energiemonitoring-Blueprint für MYP Platform
============================================

Dieses Modul stellt alle Routen und Funktionen für die Energieüberwachung
von TP-Link Tapo P110 Smart Plugs bereit.

Funktionalitäten:
- Live-Energiedaten abrufen
- Historische Verbrauchsstatistiken
- Energieverbrauchsdiagramme
- Energieeffizienz-Analysen
"""

from flask import Blueprint, request, jsonify, render_template
from flask_login import login_required, current_user
from datetime import datetime, timedelta
from typing import Dict, List, Any, Optional

from models import Printer, get_db_session, PlugStatusLog
from utils.logging_config import get_logger, measure_execution_time
from utils.security_suite import require_permission, Permission
from utils.hardware_integration import get_tapo_controller

# Logger initialisieren
energy_logger = get_logger("energy_monitoring")

# Blueprint erstellen
energy_blueprint = Blueprint("energy", __name__, url_prefix="/energy")
energy_api_blueprint = Blueprint("energy_api", __name__, url_prefix="/api/energy")

# ===== FRONTEND ROUTEN =====

@energy_blueprint.route("/")
@login_required
def energy_dashboard():
    """
    Hauptseite für Energiemonitoring-Dashboard.
    
    Returns:
        Rendered HTML template mit Energieübersicht
    """
    energy_logger.info(f"🔋 Energiemonitoring-Dashboard aufgerufen von {current_user.username}")
    
    try:
        # Basis-Statistiken für Template laden
        basic_stats = {
            'total_power_consumption': 15.2,
            'current_power': 450.0,
            'active_devices': 3,
            'total_devices': 5
        }
        
        return render_template(
            'energy_dashboard.html',
            stats=basic_stats,
            current_user=current_user,
            page_title="Energiemonitoring"
        )
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Laden des Energiemonitoring-Dashboards: {str(e)}")
        return render_template(
            'energy_dashboard.html',
            stats={'error': str(e)},
            current_user=current_user,
            page_title="Energiemonitoring"
        )

@energy_blueprint.route("/device/<int:device_id>")
@login_required
def device_details(device_id):
    """
    Detailseite für ein spezifisches Energiemonitoring-Gerät.
    
    Args:
        device_id: ID des Druckers/Geräts
        
    Returns:
        Rendered HTML template mit Gerätedetails
    """
    energy_logger.info(f"🔍 Gerätedetails für ID {device_id} aufgerufen von {current_user.username}")
    
    try:
        with get_db_session() as db_session:
            printer = db_session.query(Printer).filter(Printer.id == device_id).first()
            
            if not printer:
                energy_logger.warning(f"Gerät {device_id} nicht gefunden")
                return render_template('errors/404.html'), 404
            
            # Mock-Energiedaten für Template
            energy_data = {
                'current_power': 125.5,
                'daily_consumption': 2.4,
                'monthly_consumption': 45.8,
                'daily_runtime': '8h 30m',
                'monthly_runtime': '156h 45m',
                'last_update': datetime.now().strftime('%d.%m.%Y %H:%M:%S')
            }
            
            return render_template(
                'energy_device_details.html',
                device=printer,
                energy_data=energy_data,
                current_user=current_user,
                page_title=f"Energiemonitoring - {printer.name}"
            )
            
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Laden der Gerätedetails: {str(e)}")
        return render_template('errors/500.html'), 500

# ===== API ENDPUNKTE =====

@energy_api_blueprint.route("/overview", methods=["GET"])
@login_required
def api_energy_overview():
    """
    API-Endpunkt für Energieübersicht (für Dashboard).
    
    Returns:
        JSON: Grundlegende Energiestatistiken
    """
    try:
        # Mock-Daten für Demo
        overview_data = {
            'total_power_consumption': 15.2,
            'current_power': 450.0,
            'active_devices': 3,
            'total_devices': 5,
            'timestamp': datetime.now().isoformat()
        }
        
        return jsonify(overview_data)
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Abrufen der Energieübersicht: {str(e)}")
        return jsonify({'error': str(e)}), 500

@energy_api_blueprint.route("/devices", methods=["GET"])
@login_required
def api_energy_devices():
    """
    API-Endpunkt für Geräteliste mit Energiedaten.
    
    Returns:
        JSON: Liste aller Geräte mit Energieinformationen
    """
    try:
        with get_db_session() as db_session:
            printers = db_session.query(Printer).all()
            
            devices = []
            for printer in printers:
                devices.append({
                    'id': printer.id,
                    'name': printer.name,
                    'model': printer.model,
                    'status': printer.status,
                    'current_power': 0.0,  # Mock-Daten
                    'daily_consumption': 0.0,
                    'plug_ip': printer.plug_ip
                })
        
        return jsonify({'devices': devices})
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Abrufen der Geräteliste: {str(e)}")
        return jsonify({'error': str(e)}), 500

@energy_api_blueprint.route("/device/<int:device_id>", methods=["GET"])
@login_required
def api_energy_device_details(device_id):
    """
    API-Endpunkt für Gerätespezifische Energiedaten.
    
    Args:
        device_id: ID des Geräts
        
    Returns:
        JSON: Detaillierte Energiedaten für das Gerät
    """
    try:
        with get_db_session() as db_session:
            printer = db_session.query(Printer).filter(Printer.id == device_id).first()
            
            if not printer:
                return jsonify({'error': 'Gerät nicht gefunden'}), 404
            
            # Mock-Daten für Demo
            device_data = {
                'current_power': 125.5,
                'daily_consumption': 2.4,
                'monthly_consumption': 45.8,
                'daily_runtime': '8h 30m',
                'monthly_runtime': '156h 45m',
                'last_update': datetime.now().isoformat()
            }
        
        return jsonify(device_data)
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Abrufen der Gerätedaten: {str(e)}")
        return jsonify({'error': str(e)}), 500

@energy_api_blueprint.route("/dashboard", methods=["GET"])
@login_required
@measure_execution_time(logger=energy_logger, task_name="API-Energiemonitoring-Dashboard")
def api_energy_dashboard():
    """
    API-Endpunkt für Energiemonitoring-Dashboard-Daten.
    
    Returns:
        JSON: Umfassende Energiestatistiken für Dashboard
    """
    energy_logger.info(f"📊 API-Energiemonitoring-Dashboard von {current_user.username}")
    
    try:
        tapo_controller = get_tapo_controller()
        energy_stats = tapo_controller.get_energy_statistics()
        
        # Zusätzliche Dashboard-Metriken berechnen
        dashboard_data = {
            'overview': {
                'total_devices': energy_stats['total_devices'],
                'online_devices': energy_stats['online_devices'],
                'offline_devices': energy_stats['total_devices'] - energy_stats['online_devices'],
                'availability_rate': round((energy_stats['online_devices'] / energy_stats['total_devices'] * 100) if energy_stats['total_devices'] > 0 else 0, 1)
            },
            'current_consumption': {
                'total_power': round(energy_stats['total_current_power'], 2),
                'average_power': round(energy_stats['avg_current_power'], 2),
                'max_power_device': None,
                'min_power_device': None
            },
            'energy_totals': {
                'today_total': round(energy_stats['total_today_energy'], 1),
                'month_total': round(energy_stats['total_month_energy'], 1),
                'today_average': round(energy_stats['avg_today_energy'], 1),
                'month_average': round(energy_stats['avg_month_energy'], 1)
            },
            'trend_data': {
                'hourly': energy_stats['hourly_consumption'],
                'daily': energy_stats['daily_consumption'],
                'monthly': energy_stats['monthly_consumption']
            },
            'devices': energy_stats['devices'],
            'timestamp': energy_stats['timestamp']
        }
        
        # Max/Min Gerät finden
        if energy_stats['devices']:
            online_devices = [d for d in energy_stats['devices'] if d['online'] and d['current_power'] > 0]
            if online_devices:
                max_device = max(online_devices, key=lambda x: x['current_power'])
                min_device = min(online_devices, key=lambda x: x['current_power'])
                
                dashboard_data['current_consumption']['max_power_device'] = {
                    'name': max_device['name'],
                    'power': round(max_device['current_power'], 2)
                }
                dashboard_data['current_consumption']['min_power_device'] = {
                    'name': min_device['name'],
                    'power': round(min_device['current_power'], 2)
                }
        
        energy_logger.info(f"✅ Dashboard-Daten erfolgreich erstellt: {dashboard_data['overview']['online_devices']} Geräte online")
        
        return jsonify({
            'success': True,
            'data': dashboard_data
        })
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Erstellen der Dashboard-Daten: {str(e)}")
        return jsonify({
            'success': False,
            'error': 'Fehler beim Laden der Energiedaten',
            'message': str(e)
        }), 500

@energy_api_blueprint.route("/device/<int:device_id>", methods=["GET"])
@login_required
@measure_execution_time(logger=energy_logger, task_name="API-Gerätespezifische-Energiedaten")
def api_device_energy_data(device_id):
    """
    API-Endpunkt für gerätespezifische Energiedaten.
    
    Args:
        device_id: ID des Druckers/Geräts
        
    Returns:
        JSON: Detaillierte Energiedaten des Geräts
    """
    energy_logger.info(f"🔍 API-Energiedaten für Gerät {device_id} von {current_user.username}")
    
    try:
        with get_db_session() as db_session:
            printer = db_session.query(Printer).filter(Printer.id == device_id).first()
            
            if not printer:
                return jsonify({
                    'success': False,
                    'error': 'Gerät nicht gefunden'
                }), 404
            
            if not printer.plug_ip:
                return jsonify({
                    'success': False,
                    'error': 'Gerät hat keine Energiemonitoring-Steckdose konfiguriert'
                }), 400
            
            # Energiedaten vom Tapo Controller abrufen
            tapo_controller = get_tapo_controller()
            reachable, status = tapo_controller.check_outlet_status(printer.plug_ip, printer_id=device_id)
            
            if not reachable:
                return jsonify({
                    'success': False,
                    'error': 'Gerät nicht erreichbar',
                    'device_info': {
                        'id': printer.id,
                        'name': printer.name,
                        'location': printer.location,
                        'online': False
                    }
                }), 503
            
            # Detaillierte Energiedaten abrufen
            energy_stats = tapo_controller.get_energy_statistics()
            device_data = None
            
            for device in energy_stats['devices']:
                if device['id'] == device_id:
                    device_data = device
                    break
            
            if not device_data:
                return jsonify({
                    'success': False,
                    'error': 'Energiedaten für Gerät nicht verfügbar'
                }), 404
            
            # Historische Logs aus Datenbank
            recent_logs = db_session.query(PlugStatusLog).filter(
                PlugStatusLog.printer_id == device_id,
                PlugStatusLog.timestamp >= datetime.now() - timedelta(hours=24)
            ).order_by(PlugStatusLog.timestamp.desc()).limit(100).all()
            
            historical_data = []
            for log in recent_logs:
                historical_data.append({
                    'timestamp': log.timestamp.isoformat(),
                    'power_consumption': log.power_consumption,
                    'voltage': log.voltage,
                    'current': log.current,
                    'status': log.status
                })
            
            result = {
                'device_info': {
                    'id': printer.id,
                    'name': printer.name,
                    'model': printer.model,
                    'location': printer.location,
                    'ip': printer.plug_ip,
                    'online': device_data['online']
                },
                'current_metrics': {
                    'power': device_data['current_power'],
                    'voltage': device_data.get('voltage', 0),
                    'current': device_data.get('current', 0),
                    'status': 'on' if device_data['current_power'] > 0 else 'off'
                },
                'energy_consumption': {
                    'today': device_data['today_energy'],
                    'month': device_data['month_energy'],
                    'past24h': device_data['past24h'],
                    'past30d': device_data['past30d'],
                    'past1y': device_data['past1y']
                },
                'historical_logs': historical_data,
                'timestamp': datetime.now().isoformat()
            }
            
            energy_logger.info(f"✅ Energiedaten erfolgreich abgerufen für {printer.name}: {device_data['current_power']}W")
            
            return jsonify({
                'success': True,
                'data': result
            })
            
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Abrufen der Gerätedaten: {str(e)}")
        return jsonify({
            'success': False,
            'error': 'Fehler beim Abrufen der Energiedaten',
            'message': str(e)
        }), 500

@energy_api_blueprint.route("/statistics", methods=["GET"])
@login_required
@measure_execution_time(logger=energy_logger, task_name="API-Energiestatistiken")
def api_energy_statistics():
    """
    API-Endpunkt für erweiterte Energiestatistiken.
    
    Query-Parameter:
    - period: Zeitraum (today, week, month, year)
    
    Returns:
        JSON: Erweiterte Energiestatistiken
    """
    period = request.args.get('period', 'today')
    
    energy_logger.info(f"📈 API-Energiestatistiken ({period}) von {current_user.username}")
    
    try:
        tapo_controller = get_tapo_controller()
        base_stats = tapo_controller.get_energy_statistics()
        
        # Zeitraumspezifische Statistiken
        if period == 'today':
            chart_data = {
                'labels': [f"{i:02d}:00" for i in range(24)],
                'datasets': [{
                    'label': 'Stündlicher Verbrauch (Wh)',
                    'data': base_stats['hourly_consumption'],
                    'borderColor': '#3b82f6',
                    'backgroundColor': 'rgba(59, 130, 246, 0.1)',
                    'fill': True
                }]
            }
        elif period == 'week' or period == 'month':
            chart_data = {
                'labels': [f"Tag {i+1}" for i in range(30)],
                'datasets': [{
                    'label': 'Täglicher Verbrauch (Wh)',
                    'data': base_stats['daily_consumption'],
                    'borderColor': '#10b981',
                    'backgroundColor': 'rgba(16, 185, 129, 0.1)',
                    'fill': True
                }]
            }
        elif period == 'year':
            month_names = ['Jan', 'Feb', 'Mär', 'Apr', 'Mai', 'Jun',
                          'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez']
            chart_data = {
                'labels': month_names,
                'datasets': [{
                    'label': 'Monatlicher Verbrauch (Wh)',
                    'data': base_stats['monthly_consumption'],
                    'borderColor': '#f59e0b',
                    'backgroundColor': 'rgba(245, 158, 11, 0.1)',
                    'fill': True
                }]
            }
        else:
            chart_data = {'labels': [], 'datasets': []}
        
        result = {
            'period': period,
            'summary': {
                'total_consumption': base_stats['total_today_energy'] if period == 'today' else base_stats['total_month_energy'],
                'average_power': base_stats['avg_current_power'],
                'device_count': base_stats['online_devices']
            },
            'chart_data': chart_data,
            'device_breakdown': base_stats['devices'],
            'timestamp': base_stats['timestamp']
        }
        
        energy_logger.info(f"✅ Energiestatistiken erfolgreich erstellt für Zeitraum: {period}")
        
        return jsonify({
            'success': True,
            'data': result
        })
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Erstellen der Energiestatistiken: {str(e)}")
        return jsonify({
            'success': False,
            'error': 'Fehler beim Erstellen der Statistiken',
            'message': str(e)
        }), 500

@energy_api_blueprint.route("/live", methods=["GET"])
@login_required
@measure_execution_time(logger=energy_logger, task_name="API-Live-Energiedaten")
def api_live_energy_data():
    """
    API-Endpunkt für Live-Energiedaten (für Real-Time Updates).
    
    Returns:
        JSON: Aktuelle Energiedaten aller Geräte
    """
    energy_logger.debug(f"⚡ Live-Energiedaten von {current_user.username}")
    
    try:
        tapo_controller = get_tapo_controller()
        live_stats = tapo_controller.get_energy_statistics()
        
        # Nur Live-Daten für minimale Latenz
        live_data = {
            'total_power': round(live_stats['total_current_power'], 2),
            'device_count': live_stats['online_devices'],
            'devices': [
                {
                    'id': d['id'],
                    'name': d['name'],
                    'power': round(d['current_power'], 2),
                    'online': d['online']
                }
                for d in live_stats['devices']
            ],
            'timestamp': live_stats['timestamp']
        }
        
        return jsonify({
            'success': True,
            'data': live_data
        })
        
    except Exception as e:
        energy_logger.error(f"❌ Fehler beim Abrufen der Live-Energiedaten: {str(e)}")
        return jsonify({
            'success': False,
            'error': 'Fehler beim Abrufen der Live-Daten',
            'message': str(e)
        }), 500

# Legacy-Funktionen für Rückwärtskompatibilität
def get_energy_monitoring():
    """Legacy-Funktion für Energiemonitoring-Zugriff."""
    return get_tapo_controller()

# Exportierte Blueprints
__all__ = ['energy_blueprint', 'energy_api_blueprint', 'get_energy_monitoring']

energy_logger.info("✅ Energiemonitoring-Blueprint initialisiert")