"""USB plugin API endpoints."""

from flask import Blueprint, request
from flask_jwt_extended import jwt_required
from datetime import datetime

from shopdb.extensions import db
from shopdb.core.models import Machine, MachineType, Vendor, Model
from shopdb.utils.responses import (
    success_response,
    error_response,
    paginated_response,
    ErrorCodes
)
from shopdb.utils.pagination import get_pagination_params, paginate_query

from ..models import USBCheckout

usb_bp = Blueprint('usb', __name__)


def get_usb_machinetype_id():
    """Get the USB Device machine type ID dynamically."""
    usb_type = MachineType.query.filter(
        MachineType.machinetype.ilike('%usb%')
    ).first()
    return usb_type.machinetypeid if usb_type else None


@usb_bp.route('', methods=['GET'])
@jwt_required()
def list_usb_devices():
    """
    List all USB devices with checkout status.

    Query parameters:
    - page, per_page: Pagination
    - search: Search by serial number or alias
    - available: Filter to only available (not checked out) devices
    """
    page, per_page = get_pagination_params(request)

    usb_type_id = get_usb_machinetype_id()
    if not usb_type_id:
        return success_response([])  # No USB type found

    # Get USB devices from machines table
    query = db.session.query(Machine).filter(
        Machine.machinetypeid == usb_type_id,
        Machine.isactive == True
    )
    
    # Search filter
    if search := request.args.get('search'):
        query = query.filter(
            db.or_(
                Machine.serialnumber.ilike(f'%{search}%'),
                Machine.alias.ilike(f'%{search}%'),
                Machine.machinenumber.ilike(f'%{search}%')
            )
        )
    
    query = query.order_by(Machine.alias)
    
    items, total = paginate_query(query, page, per_page)
    
    # Build response with checkout status
    data = []
    for device in items:
        # Check if currently checked out
        active_checkout = USBCheckout.query.filter_by(
            machineid=device.machineid,
            checkin_time=None
        ).first()
        
        item = {
            'machineid': device.machineid,
            'machinenumber': device.machinenumber,
            'alias': device.alias,
            'serialnumber': device.serialnumber,
            'notes': device.notes,
            'vendor_name': device.vendor.vendorname if device.vendor else None,
            'model_name': device.model.modelnumber if device.model else None,
            'is_checked_out': active_checkout is not None,
            'current_checkout': active_checkout.to_dict() if active_checkout else None
        }
        data.append(item)
    
    # Filter by availability if requested
    if request.args.get('available', '').lower() == 'true':
        data = [d for d in data if not d['is_checked_out']]
        total = len(data)
    
    return paginated_response(data, page, per_page, total)


@usb_bp.route('/<int:device_id>', methods=['GET'])
@jwt_required()
def get_usb_device(device_id: int):
    """Get a single USB device with checkout history."""
    device = Machine.query.filter_by(
        machineid=device_id,
        machinetypeid=get_usb_machinetype_id()
    ).first()
    
    if not device:
        return error_response(
            ErrorCodes.NOT_FOUND,
            f'USB device with ID {device_id} not found',
            http_code=404
        )
    
    # Get checkout history
    checkouts = USBCheckout.query.filter_by(
        machineid=device_id
    ).order_by(USBCheckout.checkout_time.desc()).limit(50).all()
    
    # Check current checkout
    active_checkout = next((c for c in checkouts if c.checkin_time is None), None)
    
    result = {
        'machineid': device.machineid,
        'machinenumber': device.machinenumber,
        'alias': device.alias,
        'serialnumber': device.serialnumber,
        'notes': device.notes,
        'vendor_name': device.vendor.vendorname if device.vendor else None,
        'model_name': device.model.modelnumber if device.model else None,
        'is_checked_out': active_checkout is not None,
        'current_checkout': active_checkout.to_dict() if active_checkout else None,
        'checkout_history': [c.to_dict() for c in checkouts]
    }
    
    return success_response(result)


@usb_bp.route('/<int:device_id>/checkout', methods=['POST'])
@jwt_required()
def checkout_device(device_id: int):
    """Check out a USB device."""
    device = Machine.query.filter_by(
        machineid=device_id,
        machinetypeid=get_usb_machinetype_id()
    ).first()
    
    if not device:
        return error_response(
            ErrorCodes.NOT_FOUND,
            f'USB device with ID {device_id} not found',
            http_code=404
        )
    
    # Check if already checked out
    active_checkout = USBCheckout.query.filter_by(
        machineid=device_id,
        checkin_time=None
    ).first()
    
    if active_checkout:
        return error_response(
            ErrorCodes.CONFLICT,
            f'Device is already checked out by {active_checkout.sso}',
            http_code=409
        )
    
    data = request.get_json() or {}
    
    if not data.get('sso'):
        return error_response(ErrorCodes.VALIDATION_ERROR, 'sso is required')
    
    checkout = USBCheckout(
        machineid=device_id,
        sso=data['sso'],
        checkout_name=data.get('name'),
        checkout_reason=data.get('reason'),
        checkout_time=datetime.utcnow()
    )
    
    db.session.add(checkout)
    db.session.commit()
    
    return success_response(checkout.to_dict(), message='Device checked out', http_code=201)


@usb_bp.route('/<int:device_id>/checkin', methods=['POST'])
@jwt_required()
def checkin_device(device_id: int):
    """Check in a USB device."""
    device = Machine.query.filter_by(
        machineid=device_id,
        machinetypeid=get_usb_machinetype_id()
    ).first()
    
    if not device:
        return error_response(
            ErrorCodes.NOT_FOUND,
            f'USB device with ID {device_id} not found',
            http_code=404
        )
    
    # Find active checkout
    active_checkout = USBCheckout.query.filter_by(
        machineid=device_id,
        checkin_time=None
    ).first()
    
    if not active_checkout:
        return error_response(
            ErrorCodes.VALIDATION_ERROR,
            'Device is not currently checked out',
            http_code=400
        )
    
    data = request.get_json() or {}
    
    active_checkout.checkin_time = datetime.utcnow()
    active_checkout.was_wiped = data.get('was_wiped', False)
    active_checkout.checkin_notes = data.get('notes')
    
    db.session.commit()
    
    return success_response(active_checkout.to_dict(), message='Device checked in')


@usb_bp.route('/<int:device_id>/history', methods=['GET'])
@jwt_required()
def get_checkout_history(device_id: int):
    """Get checkout history for a USB device."""
    page, per_page = get_pagination_params(request)
    
    query = USBCheckout.query.filter_by(
        machineid=device_id
    ).order_by(USBCheckout.checkout_time.desc())
    
    items, total = paginate_query(query, page, per_page)
    data = [c.to_dict() for c in items]
    
    return paginated_response(data, page, per_page, total)


@usb_bp.route('/checkouts', methods=['GET'])
@jwt_required()
def list_all_checkouts():
    """List all checkouts (active and historical)."""
    page, per_page = get_pagination_params(request)
    
    query = db.session.query(USBCheckout).join(
        Machine, USBCheckout.machineid == Machine.machineid
    )
    
    # Filter by active only
    if request.args.get('active', '').lower() == 'true':
        query = query.filter(USBCheckout.checkin_time == None)
    
    # Filter by user
    if sso := request.args.get('sso'):
        query = query.filter(USBCheckout.sso == sso)
    
    query = query.order_by(USBCheckout.checkout_time.desc())
    
    items, total = paginate_query(query, page, per_page)
    
    # Include device info
    data = []
    for checkout in items:
        device = Machine.query.get(checkout.machineid)
        item = checkout.to_dict()
        item['device'] = {
            'machineid': device.machineid,
            'alias': device.alias,
            'serialnumber': device.serialnumber
        } if device else None
        data.append(item)
    
    return paginated_response(data, page, per_page, total)