import sqlite3
import json
from datetime import datetime, timedelta, timezone
import logging

logger = logging.getLogger(__name__)

DATABASE_FILE = 'monitoring.db'

def initialize_database():
    """Initializes the database and creates tables if they don't exist."""
    try:
        conn = sqlite3.connect(DATABASE_FILE)
        cursor = conn.cursor()

        # Main table for monitoring data
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS monitoring_data (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            timestamp TEXT NOT NULL
        )
        """)

        # Table for network metrics
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS network_metrics (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            rtt_avg REAL,
            packet_loss_rate REAL,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for temperatures
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS temperatures (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            cpu_temp REAL,
            gpu_temp REAL,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for login attempts
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS login_attempts (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            log_line TEXT,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for Nmap scans
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS nmap_scans (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            scan_data TEXT,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for Docker status
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS docker_status (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            container_name TEXT,
            status TEXT,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for syslog
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS syslog (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            log_data TEXT,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        # Table for ufw logs
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS ufw_logs (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            monitoring_data_id INTEGER,
            log_line TEXT,
            FOREIGN KEY (monitoring_data_id) REFERENCES monitoring_data (id)
        )
        """)

        conn.commit()
        conn.close()
        logger.info("Database initialized successfully.")
    except sqlite3.Error as e:
        logger.error(f"Error initializing database: {e}")

def store_data(new_data):
    """Stores new monitoring data in the database."""
    try:
        conn = sqlite3.connect(DATABASE_FILE)
        cursor = conn.cursor()

        # Insert into main table
        cursor.execute("INSERT INTO monitoring_data (timestamp) VALUES (?)", (new_data['timestamp'],))
        monitoring_data_id = cursor.lastrowid

        # Insert into network_metrics
        if 'network_metrics' in new_data:
            nm = new_data['network_metrics']
            cursor.execute("INSERT INTO network_metrics (monitoring_data_id, rtt_avg, packet_loss_rate) VALUES (?, ?, ?)",
                           (monitoring_data_id, nm.get('rtt_avg'), nm.get('packet_loss_rate')))

        # Insert into temperatures
        if 'cpu_temperature' in new_data or 'gpu_temperature' in new_data:
            cpu_temp = new_data.get('cpu_temperature', {}).get('cpu_temperature')
            gpu_temp = new_data.get('gpu_temperature', {}).get('gpu_temperature')
            cursor.execute("INSERT INTO temperatures (monitoring_data_id, cpu_temp, gpu_temp) VALUES (?, ?, ?)",
                           (monitoring_data_id, cpu_temp, gpu_temp))

        # Insert into login_attempts
        if 'login_attempts' in new_data and new_data['login_attempts'].get('failed_login_attempts'):
            for line in new_data['login_attempts']['failed_login_attempts']:
                cursor.execute("INSERT INTO login_attempts (monitoring_data_id, log_line) VALUES (?, ?)",
                               (monitoring_data_id, line))

        # Insert into nmap_scans
        if 'nmap_results' in new_data:
            cursor.execute("INSERT INTO nmap_scans (monitoring_data_id, scan_data) VALUES (?, ?)",
                           (monitoring_data_id, json.dumps(new_data['nmap_results'])))

        # Insert into docker_status
        if 'docker_container_status' in new_data:
            for name, status in new_data['docker_container_status'].get('docker_container_status', {}).items():
                cursor.execute("INSERT INTO docker_status (monitoring_data_id, container_name, status) VALUES (?, ?, ?)",
                               (monitoring_data_id, name, status))

        # Insert into syslog
        if 'system_logs' in new_data:
            for log in new_data['system_logs'].get('syslog', []):
                cursor.execute("INSERT INTO syslog (monitoring_data_id, log_data) VALUES (?, ?)",
                               (monitoring_data_id, json.dumps(log)))

        # Insert into ufw_logs
        if 'ufw_logs' in new_data:
            for line in new_data['ufw_logs']:
                cursor.execute("INSERT INTO ufw_logs (monitoring_data_id, log_line) VALUES (?, ?)",
                               (monitoring_data_id, line))

        conn.commit()
        conn.close()
    except sqlite3.Error as e:
        logger.error(f"Error storing data: {e}")

def calculate_baselines():
    """Calculates baseline metrics from data in the last 24 hours."""
    try:
        conn = sqlite3.connect(DATABASE_FILE)
        cursor = conn.cursor()

        twenty_four_hours_ago = (datetime.now(timezone.utc) - timedelta(hours=24)).isoformat()

        # Calculate average RTT and packet loss
        cursor.execute("""
        SELECT AVG(nm.rtt_avg), AVG(nm.packet_loss_rate)
        FROM network_metrics nm
        JOIN monitoring_data md ON nm.monitoring_data_id = md.id
        WHERE md.timestamp > ?
        """, (twenty_four_hours_ago,))
        avg_rtt, avg_packet_loss = cursor.fetchone()

        # Calculate average temperatures
        cursor.execute("""
        SELECT AVG(t.cpu_temp), AVG(t.gpu_temp)
        FROM temperatures t
        JOIN monitoring_data md ON t.monitoring_data_id = md.id
        WHERE md.timestamp > ?
        """, (twenty_four_hours_ago,))
        avg_cpu_temp, avg_gpu_temp = cursor.fetchone()

        # Get baseline open ports
        cursor.execute("""
        SELECT ns.scan_data
        FROM nmap_scans ns
        JOIN monitoring_data md ON ns.monitoring_data_id = md.id
        WHERE md.timestamp > ?
        ORDER BY md.timestamp DESC
        LIMIT 1
        """, (twenty_four_hours_ago,))
        latest_nmap_scan = cursor.fetchone()

        host_ports = {}
        if latest_nmap_scan:
            scan_data = json.loads(latest_nmap_scan[0])
            if 'hosts' in scan_data:
                for host_info in scan_data['hosts']:
                    host_ip = host_info['ip']
                    if host_ip not in host_ports:
                        host_ports[host_ip] = set()
                    for port_info in host_info.get('open_ports', []):
                        host_ports[host_ip].add(port_info['port'])
        
        for host, ports in host_ports.items():
            host_ports[host] = sorted(list(ports))

        conn.close()

        return {
            'avg_rtt': avg_rtt or 0,
            'packet_loss': avg_packet_loss or 0,
            'avg_cpu_temp': avg_cpu_temp or 0,
            'avg_gpu_temp': avg_gpu_temp or 0,
            'host_ports': host_ports
        }

    except sqlite3.Error as e:
        logger.error(f"Error calculating baselines: {e}")
        return {}

def enforce_retention_policy(retention_days=7):
    """Enforces the data retention policy by deleting old data."""
    try:
        conn = sqlite3.connect(DATABASE_FILE)
        cursor = conn.cursor()

        retention_cutoff = (datetime.now(timezone.utc) - timedelta(days=retention_days)).isoformat()

        # Find old monitoring_data IDs
        cursor.execute("SELECT id FROM monitoring_data WHERE timestamp < ?", (retention_cutoff,))
        old_ids = [row[0] for row in cursor.fetchall()]

        if not old_ids:
            logger.info("No old data to delete.")
            conn.close()
            return

        # Create a placeholder string for the IN clause
        placeholders = ','.join('?' for _ in old_ids)

        # Delete from child tables
        cursor.execute(f"DELETE FROM network_metrics WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM temperatures WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM login_attempts WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM nmap_scans WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM docker_status WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM syslog WHERE monitoring_data_id IN ({placeholders})", old_ids)
        cursor.execute(f"DELETE FROM ufw_logs WHERE monitoring_data_id IN ({placeholders})", old_ids)

        # Delete from the main table
        cursor.execute(f"DELETE FROM monitoring_data WHERE id IN ({placeholders})", old_ids)

        conn.commit()
        conn.close()
        logger.info(f"Deleted {len(old_ids)} old records.")
    except sqlite3.Error as e:
        logger.error(f"Error enforcing retention policy: {e}")