from flask import Flask, render_template, redirect, url_for, request, flash, jsonify
from flask_login import LoginManager, UserMixin, login_user, logout_user, login_required, current_user
from werkzeug.security import check_password_hash
import yaml
import logging
from apscheduler.schedulers.background import BackgroundScheduler
from datetime import datetime
import os

from database import Database
from monitor import OPNsenseMonitor
from email_handler import EmailHandler

# Load version
with open('VERSION', 'r') as f:
    VERSION = f.read().strip()

# Load configuration
with open('config/config.yaml', 'r') as f:
    config = yaml.safe_load(f)

# Setup logging
from logging.handlers import RotatingFileHandler
import os

# Create logs directory if it doesn't exist
logs_dir = os.path.dirname(config['logging']['file'])
if logs_dir and not os.path.exists(logs_dir):
    os.makedirs(logs_dir, exist_ok=True)

# Main log file with rotation
main_handler = RotatingFileHandler(
    config['logging']['file'],
    maxBytes=config['logging'].get('max_bytes', 10 * 1024 * 1024),  # 10MB default
    backupCount=config['logging'].get('backup_count', 5)
)
main_handler.setLevel(getattr(logging, config['logging']['level']))
main_handler.setFormatter(logging.Formatter(
    '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
))

# Error log file (separate file for errors only)
error_handler = RotatingFileHandler(
    config['logging']['error_file'],
    maxBytes=config['logging'].get('max_bytes', 10 * 1024 * 1024),
    backupCount=config['logging'].get('backup_count', 5)
)
error_handler.setLevel(logging.ERROR)
error_handler.setFormatter(logging.Formatter(
    '%(asctime)s - %(name)s - %(levelname)s - %(message)s - [%(pathname)s:%(lineno)d]'
))

# Console handler
console_handler = logging.StreamHandler()
console_handler.setLevel(getattr(logging, config['logging']['level']))
console_handler.setFormatter(logging.Formatter(
    '%(asctime)s - %(levelname)s - %(message)s'
))

# Configure root logger
logging.basicConfig(
    level=logging.DEBUG,  # Capture everything, handlers filter
    handlers=[main_handler, error_handler, console_handler]
)

logger = logging.getLogger(__name__)

# Initialize Flask
app = Flask(__name__)
app.config['SECRET_KEY'] = config['web']['secret_key']

# Initialize Flask-Login
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'

# Initialize components
db = Database(config['database']['path'])
email_handler = EmailHandler(config['email']) if config['email']['enabled'] else None
monitor = OPNsenseMonitor(config, db, email_handler)

# Simple User class
class User(UserMixin):
    def __init__(self, id):
        self.id = id

@login_manager.user_loader
def load_user(user_id):
    return User(user_id)

# Routes
@app.route('/')
@login_required
def index():
    return redirect(url_for('dashboard'))

@app.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('dashboard'))
    
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        
        # Simple authentication (username: admin)
        if username == 'admin' and check_password_hash(
            config['web']['admin_password_hash'], password
        ):
            user = User('admin')
            login_user(user)
            logger.info(f"User {username} logged in successfully")
            return redirect(url_for('dashboard'))
        else:
            logger.warning(f"Failed login attempt for user: {username}")
            flash('Invalid username or password', 'danger')
    
    return render_template('login.html')

@app.route('/logout')
@login_required
def logout():
    logger.info(f"User {current_user.id} logged out")
    logout_user()
    return redirect(url_for('login'))

@app.route('/dashboard')
@login_required
def dashboard():
    # Get recent events
    events = db.get_recent_events(limit=100)
    stats = db.get_statistics()
    
    return render_template('dashboard.html', 
                         events=events, 
                         stats=stats,
                         config=config)

@app.route('/api/events')
@login_required
def api_events():
    """API endpoint for real-time event updates"""
    limit = request.args.get('limit', 50, type=int)
    event_type = request.args.get('type', None)
    interface = request.args.get('interface', None)
    
    events = db.get_recent_events(limit=limit, event_type=event_type, interface=interface)
    return jsonify(events)

@app.route('/api/stats')
@login_required
def api_stats():
    """API endpoint for statistics"""
    return jsonify(db.get_statistics())

@app.route('/health')
def health():
    """Health check endpoint"""
    return jsonify({
        'status': 'healthy',
        'timestamp': datetime.now().isoformat(),
        'version': VERSION
    })

# Initialize scheduler
def start_monitoring():
    scheduler = BackgroundScheduler()
    interval = config['monitoring']['polling_interval']
    
    scheduler.add_job(
        func=monitor.check_all,
        trigger="interval",
        seconds=interval,
        id='opnsense_monitor',
        name='OPNsense Monitor',
        replace_existing=True
    )
    
    scheduler.start()
    logger.info(f"Monitoring started with {interval}s interval")
    
    # Send startup notification
    if email_handler and config['email']['send_on_startup']:
        email_handler.send_startup_notification()

if __name__ == '__main__':
    logger.info(f"Starting Watchdog Docker v{VERSION}")

    # Initialize database
    db.initialize()

    # Start monitoring
    start_monitoring()

    # Run Flask
    app.run(
        host=config['web']['host'],
        port=config['web']['port'],
        debug=False
    )