"""Employees plugin main class.

Blueprint-only plugin: a read-only employee directory lookup over a separate HR
database. No model (the directory is an external DB) and no AssetType. The
connection helper (employee_connection) stays core infrastructure in shopdb.api,
shared with search and the notifications shopfloor feed.
"""

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 .api import employees_bp

logger = logging.getLogger(__name__)


class EmployeesPlugin(BasePlugin):
    """Employees plugin - read-only HR directory lookup."""

    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', 'employees'),
            version=self._manifest.get('version', '1.0.0'),
            description=self._manifest.get(
                'description',
                'Read-only employee directory lookup'
            ),
            author=self._manifest.get('author', 'ShopDB Team'),
            dependencies=self._manifest.get('dependencies', []),
            core_version=self._manifest.get('core_version', '>=0.1.0,<1.0.0'),
            api_prefix=self._manifest.get('api_prefix', '/api/employees'),
        )

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

    def get_models(self) -> List[Type]:
        """No models - the directory is an external database."""
        return []

    def init_app(self, app: Flask, db_instance) -> None:
        """Initialize plugin with Flask app."""
        logger.info(f"Employees plugin initialized (v{self.meta.version})")