"""Printers plugin main class."""

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

from flask import Flask, Blueprint
import click

from shopdb.plugins.base import BasePlugin, PluginMeta
from shopdb.api import db, AssetType

from .models import Printer, PrinterType, ModelSupply, PrinterDriver
from .api import printers_asset_bp
from .services import ZabbixService

logger = logging.getLogger(__name__)


class PrintersPlugin(BasePlugin):
    """
    Printers plugin - manages printer assets.

    Supports both legacy Machine-based architecture and new Asset-based architecture:
    - Legacy: PrinterData table linked to machines
    - New: Printer table linked to assets

    Features:
    - PrinterType classification
    - Windows/network naming
    - Zabbix integration for real-time supply level lookups
    """

    def __init__(self):
        self._manifest = self._load_manifest()
        self._zabbixservice = None

    def _load_manifest(self) -> Dict:
        """Load plugin manifest from JSON file."""
        manifestpath = Path(__file__).parent / 'manifest.json'
        if manifestpath.exists():
            with open(manifestpath, 'r') as f:
                return json.load(f)
        return {}

    @property
    def meta(self) -> PluginMeta:
        """Return plugin metadata."""
        return PluginMeta(
            name=self._manifest.get('name', 'printers'),
            version=self._manifest.get('version', '2.0.0'),
            description=self._manifest.get(
                'description',
                'Printer management with Zabbix integration'
            ),
            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/printers'),
        )

    def get_blueprint(self) -> Optional[Blueprint]:
        """
        Return Flask Blueprint with API routes.

        Returns the new Asset-based blueprint.
        Legacy Machine-based blueprint is registered separately in init_app.
        """
        return printers_asset_bp

    def get_models(self) -> List[Type]:
        """Return list of SQLAlchemy model classes."""
        return [
            Printer,       # Asset-based
            PrinterType,   # printer type classification
            PrinterDriver, # driver links (SMB/HTTP)
            ModelSupply,   # model -> toner/drum/waste part numbers
        ]

    def get_services(self) -> Dict[str, Type]:
        """Return plugin services."""
        return {
            'zabbix': ZabbixService,
        }

    @property
    def zabbixservice(self) -> ZabbixService:
        """Get Zabbix service instance."""
        if self._zabbixservice is None:
            self._zabbixservice = ZabbixService()
        return self._zabbixservice

    def init_app(self, app: Flask, db_instance) -> None:
        """Initialize plugin with Flask app."""
        app.config.setdefault('ZABBIX_URL', '')
        app.config.setdefault('ZABBIX_TOKEN', '')

        logger.info(f"Printers plugin initialized (v{self.meta.version})")

    def on_install(self, app: Flask) -> None:
        """Called when plugin is installed."""
        with app.app_context():
            self._ensure_asset_type()
            self._ensure_printer_types()
            logger.info("Printers plugin installed")

    def _ensure_asset_type(self) -> None:
        """Ensure printer asset type exists."""
        existing = AssetType.query.filter_by(assettype='printer').first()
        if not existing:
            at = AssetType(
                assettype='printer',
                pluginname='printers',
                tablename='printers',
                description='Printers (laser, inkjet, label, MFP, plotter)',
                icon='printer'
            )
            db.session.add(at)
            logger.debug("Created asset type: printer")
        db.session.commit()

    def _ensure_printer_types(self) -> None:
        """Ensure basic printer types exist (new architecture)."""
        printer_types = [
            ('Laser', 'Standard laser printer', 'printer'),
            ('Inkjet', 'Inkjet printer', 'printer'),
            ('Label', 'Label/barcode printer', 'barcode'),
            ('Card', 'ID / card printer', 'id-card'),
            ('MFP', 'Multifunction printer with scan/copy/fax', 'printer'),
            ('Plotter', 'Large format plotter', 'drafting-compass'),
            ('Thermal', 'Thermal printer', 'temperature-high'),
            ('Dot Matrix', 'Dot matrix printer', 'th'),
            ('Other', 'Other printer type', 'printer'),
        ]

        for name, description, icon in printer_types:
            existing = PrinterType.query.filter_by(printertype=name).first()
            if not existing:
                pt = PrinterType(
                    printertype=name,
                    description=description,
                    icon=icon
                )
                db.session.add(pt)
                logger.debug(f"Created printer type: {name}")

        db.session.commit()

    def on_uninstall(self, app: Flask) -> None:
        """Called when plugin is uninstalled."""
        logger.info("Printers plugin uninstalled")

    def get_cli_commands(self) -> List:
        """Return CLI commands for this plugin."""

        @click.group('printers')
        def printerscli():
            """Printers plugin commands."""
            pass

        @printerscli.command('check-supplies')
        @click.argument('ip')
        def checksupplies(ip):
            """Check supply levels for a printer by IP (via Zabbix)."""
            from flask import current_app

            with current_app.app_context():
                service = ZabbixService()

                if not service.isconfigured:
                    click.echo('Error: Zabbix not configured. Set ZABBIX_URL and ZABBIX_TOKEN.')
                    return

                supplies = service.getsuppliesbyip(ip)
                if not supplies:
                    click.echo(f'No supply data found for {ip}')
                    return

                click.echo(f'Supply levels for {ip}:')
                for supply in supplies:
                    click.echo(f"  {supply['name']}: {supply['level']}%")

        @printerscli.command('seed-supplies')
        def seedsuppliescommand():
            """Seed corrected model->toner part numbers into modelsupplies."""
            from flask import current_app
            from .services import seedsupplies

            with current_app.app_context():
                summary = seedsupplies()
                click.echo(
                    f"Seeded supplies: {summary['suppliesadded']} added across "
                    f"{summary['modelstouched']} models."
                )

        return [printerscli]

    def get_dashboard_widgets(self) -> List[Dict]:
        """Return dashboard widget definitions."""
        return [
            {
                'name': 'Printer Status',
                'component': 'PrinterStatusWidget',
                'endpoint': '/api/printers/dashboard/summary',
                'size': 'medium',
                'position': 10,
            },
        ]

    def get_navigation_items(self) -> List[Dict]:
        """Return navigation menu items."""
        return [
            {
                'name': 'Printers',
                'icon': 'printer',
                'route': '/printers',
                'position': 20,
            },
        ]

    def get_reports(self) -> List[Dict]:
        """Return report card definitions for the Reports hub."""
        return [
            {
                'id': 'toner',
                'name': 'Toner Report',
                'description': 'Printers with low or critical toner/supply levels',
                'category': 'printers',
                'route': '/reports/toner',
            },
        ]

    def get_permissions(self) -> List:
        """Return the RBAC permissions this plugin owns."""
        return [
            ('printers.view', 'View printers', 'printers'),
            ('printers.create', 'Create printers', 'printers'),
            ('printers.edit', 'Edit printers', 'printers'),
            ('printers.delete', 'Delete printers', 'printers'),
        ]
