"""USB plugin main class."""

import json
import logging
from pathlib import Path
from typing import List, Dict, Optional, Type

from flask import Flask, Blueprint

from shopdb.plugins.base import BasePlugin, PluginMeta
from shopdb.extensions import db

from .models import USBDevice, USBDeviceType, USBCheckout
from .api import usb_bp

logger = logging.getLogger(__name__)


class USBPlugin(BasePlugin):
    """
    USB plugin - manages USB device tracking and checkouts.

    Standalone plugin for tracking USB flash drives, external drives,
    and other portable storage devices with checkout/checkin functionality.
    """
    
    def __init__(self):
        self._manifest = self._load_manifest()
    
    def _load_manifest(self) -> Dict:
        """Load plugin manifest from JSON file."""
        manifest_path = Path(__file__).parent / 'manifest.json'
        if manifest_path.exists():
            with open(manifest_path, 'r') as f:
                return json.load(f)
        return {}
    
    @property
    def meta(self) -> PluginMeta:
        """Return plugin metadata."""
        return PluginMeta(
            name=self._manifest.get('name', 'usb'),
            version=self._manifest.get('version', '1.0.0'),
            description=self._manifest.get('description', 'USB device checkout management'),
            author=self._manifest.get('author', 'ShopDB Team'),
            dependencies=self._manifest.get('dependencies', []),
            core_version=self._manifest.get('core_version', '>=1.0.0'),
            api_prefix=self._manifest.get('api_prefix', '/api/usb'),
        )
    
    def get_blueprint(self) -> Optional[Blueprint]:
        """Return Flask Blueprint with API routes."""
        return usb_bp
    
    def get_models(self) -> List[Type]:
        """Return list of SQLAlchemy model classes."""
        return [USBDeviceType, USBDevice, USBCheckout]
    
    def init_app(self, app: Flask, db_instance) -> None:
        """Initialize plugin with Flask app."""
        logger.info(f"USB plugin initialized (v{self.meta.version})")
    
    def on_install(self, app: Flask) -> None:
        """Called when plugin is installed."""
        logger.info("USB plugin installed")
    
    def on_uninstall(self, app: Flask) -> None:
        """Called when plugin is uninstalled."""
        logger.info("USB plugin uninstalled")
    
    def get_navigation_items(self) -> List[Dict]:
        """Return navigation menu items."""
        return [
            {
                'name': 'USB Devices',
                'icon': 'usb',
                'route': '/usb',
                'position': 45,
            },
        ]