import json
import subprocess
import time
from syslog_rfc5424_parser import parse
import jc
import ollama
from discord_webhook import DiscordWebhook, DiscordEmbed
import requests
import config

# --- Data Ingestion & Parsing Functions ---

def get_system_logs():
    """
    Simulates collecting and parsing a system log entry.

    This function uses a mock syslog entry and parses it using the
    syslog-rfc5424-parser library.

    Returns:
        dict: A dictionary representing the parsed log entry.
    """
    mock_log_entry = '<165>1 2025-08-15T12:00:00Z my-host app-name - - [meta sequenceId="1"] { "log": "Failed login attempt for user \'root\' from 10.0.0.1" }'
    parsed_log = parse(mock_log_entry)
    # The message part is a string, so we need to parse it as JSON
    # In a real scenario, you might need to handle non-json messages
    if parsed_log.message:
        try:
            log_content = json.loads(parsed_log.message)
            # We can merge the log content with the parsed log for a more complete picture
            # For now, we'll just return the content of the log message
            return log_content
        except json.JSONDecodeError:
            return {"log": parsed_log.message}
    return {}

def get_network_metrics():
    """
    Simulates collecting and parsing network data by running the ping command.

    This function uses the `ping` command to generate network statistics
    and the `jc` library to parse the output into a structured format.

    Returns:
        dict: A dictionary containing the parsed network metrics.
    """
    # We ping a reliable address, like Google's DNS, 3 times.
    # The '-c 3' argument is for Linux/macOS. For Windows, it would be '-n 3'.
    # Since the target is an Ubuntu server, we'll use '-c'.
    try:
        ping_output = subprocess.run(['ping', '-c', '3', '8.8.8.8'], capture_output=True, text=True, check=True).stdout
        parsed_metrics = jc.parse('ping', ping_output)
        # We're interested in the summary statistics
        if parsed_metrics:
            return parsed_metrics[0]
    except (subprocess.CalledProcessError, FileNotFoundError) as e:
        # Handle cases where ping fails or is not installed
        return {"error": str(e)}
    return {}


# --- LLM Interaction Function ---

def analyze_data_with_llm(data):
    """
    Analyzes the given data with a local LLM to detect anomalies.

    Args:
        data (dict): The structured data to analyze.

    Returns:
        str: The raw response text from the LLM.
    """
    structured_data_as_string = json.dumps(data, indent=2)
    prompt = f"""Role: You are a dedicated and expert system administrator. Your primary role is to identify anomalies and provide concise, actionable reports.
Instruction: Analyze the following system and network data for any activity that appears out of place or different. Consider unusual values, errors, or unexpected patterns as anomalies.
Context: Here is the system data in JSON format for your analysis: {structured_data_as_string}
Output Request: If you find an anomaly, provide a report as a single, coherent, natural language paragraph. The report must clearly state the anomaly, its potential cause, and its severity (e.g., high, medium, low). If no anomaly is found, respond with \"OK\".
Reasoning Hint: Think step by step to come to your conclusion. This is very important."""

    try:
        response = ollama.generate(
            model="llama3.1:8b",
            prompt=prompt
        )
        return response['response'].strip()
    except Exception as e:
        return f"Error communicating with Ollama: {e}"

# --- Alerting Functions ---

def send_discord_alert(message):
    """
    Sends an alert message to a Discord webhook.

    Args:
        message (str): The message to send.
    """
    if config.DISCORD_WEBHOOK_URL == "YOUR_DISCORD_WEBHOOK_URL_HERE":
        print("Skipping Discord alert: Webhook URL not configured.")
        return

    webhook = DiscordWebhook(url=config.DISCORD_WEBHOOK_URL)
    embed = DiscordEmbed(title="Anomaly Detected!", description=message, color='FF0000')
    webhook.add_embed(embed)
    try:
        response = webhook.execute()
        print("Discord alert sent.")
    except Exception as e:
        print(f"Error sending Discord alert: {e}")

def send_google_home_alert(message):
    """
    Sends an alert message to a Google Home speaker via Home Assistant.

    Args:
        message (str): The message to be spoken.
    """
    # Long or complex messages should be simplified for better Text-to-Speech delivery.
    if config.HOME_ASSISTANT_URL == "http://YOUR_HOME_ASSISTANT_IP:8123":
        print("Skipping Google Home alert: Home Assistant URL not configured.")
        return

    url = f"{config.HOME_ASSISTANT_URL}/api/services/tts/speak"
    headers = {
        "Authorization": f"Bearer {config.HOME_ASSISTANT_TOKEN}",
        "Content-Type": "application/json",
    }
    payload = {
        "entity_id": "tts.google_en_com",
        "media_player_entity_id": config.GOOGLE_HOME_SPEAKER_ID,
        "message": message,
    }

    try:
        response = requests.post(url, headers=headers, json=payload)
        response.raise_for_status()  # Raise an exception for bad status codes
        print("Google Home alert sent.")
    except requests.exceptions.RequestException as e:
        print(f"Error sending Google Home alert: {e}")

# --- Main Script Logic ---

def main():
    """
    The main execution loop for the monitoring agent.
    """
    while True:
        print("--- Running Monitoring Cycle ---")
        system_logs = get_system_logs()
        network_metrics = get_network_metrics()

        combined_data = {
            "system_logs": system_logs,
            "network_metrics": network_metrics
        }

        llm_response = analyze_data_with_llm(combined_data)
        print(f"LLM Response: {llm_response}")

        if llm_response != "OK":
            print("Anomaly detected, sending alerts...")
            send_discord_alert(llm_response)
            send_google_home_alert(llm_response)

        print("--- Cycle Complete, sleeping for 5 minutes ---")
        time.sleep(300) # 300 seconds = 5 minutes

if __name__ == "__main__":
    main()