import json
import uuid
from datetime import datetime
from pathlib import Path


class CaptureMetadata:
    def __init__(self, device_id, capture_dir):
        self.device_id = device_id
        self.capture_id = str(uuid.uuid4())
        self.capture_date = datetime.now().isoformat()
        self.capture_dir = Path(capture_dir)
        self.capture_file = ""
        self.start_time = ""
        self.stop_time = ""
        self.tcpdump_command = ""
        self.interface = ""
        self.device_ip_address = ""

    def build_capture_file_name(self):
        self.capture_file = f"{self.device_id}_{self.capture_id}.pcap"

    def to_dict(self):
        return self.__dict__

    def save_to_file(self, file_path=None):
        file_path = file_path or self.capture_dir / 'metadata.json'
        with open(file_path, 'w') as f:
            json.dump(self.to_dict(), f, indent=4)