from database import Session
from models.models import ClientGroup
from flask import Blueprint, request, jsonify
from sqlalchemy import func
import sys
sys.path.append('/workspace')

groups_bp = Blueprint("groups", __name__, url_prefix="/api/groups")


@groups_bp.route("", methods=["POST"])
def create_group():
    data = request.get_json()
    name = data.get("name")
    if not name or not name.strip():
        return jsonify({"error": "Gruppenname erforderlich"}), 400

    session = Session()
    if session.query(ClientGroup).filter_by(name=name).first():
        session.close()
        return jsonify({"error": "Gruppe existiert bereits"}), 409

    group = ClientGroup(name=name, is_active=True)
    session.add(group)
    session.commit()
    result = {
        "id": group.id,
        "name": group.name,
        "created_at": group.created_at.isoformat() if group.created_at else None,
        "is_active": group.is_active,
    }
    session.close()
    return jsonify(result), 201


@groups_bp.route("", methods=["GET"])
def get_groups():
    session = Session()
    groups = session.query(ClientGroup).all()
    result = [
        {
            "id": g.id,
            "name": g.name,
            "created_at": g.created_at.isoformat() if g.created_at else None,
            "is_active": g.is_active,
        }
        for g in groups
    ]
    session.close()
    return jsonify(result)


@groups_bp.route("/<int:group_id>", methods=["PUT"])
def update_group(group_id):
    data = request.get_json()
    session = Session()
    group = session.query(ClientGroup).filter_by(id=group_id).first()
    if not group:
        session.close()
        return jsonify({"error": "Gruppe nicht gefunden"}), 404
    if "name" in data:
        group.name = data["name"]
    if "is_active" in data:
        group.is_active = bool(data["is_active"])
    session.commit()
    result = {
        "id": group.id,
        "name": group.name,
        "created_at": group.created_at.isoformat() if group.created_at else None,
        "is_active": group.is_active,
    }
    session.close()
    return jsonify(result)


@groups_bp.route("/<int:group_id>", methods=["DELETE"])
def delete_group(group_id):
    session = Session()
    group = session.query(ClientGroup).filter_by(id=group_id).first()
    if not group:
        session.close()
        return jsonify({"error": "Gruppe nicht gefunden"}), 404
    session.delete(group)
    session.commit()
    session.close()
    return jsonify({"success": True})


@groups_bp.route("/byname/<string:group_name>", methods=["DELETE"])
def delete_group_by_name(group_name):
    session = Session()
    group = session.query(ClientGroup).filter_by(name=group_name).first()
    if not group:
        session.close()
        return jsonify({"error": "Gruppe nicht gefunden"}), 404
    session.delete(group)
    session.commit()
    session.close()
    return jsonify({"success": True})


@groups_bp.route("/byname/<string:old_name>", methods=["PUT"])
def rename_group_by_name(old_name):
    data = request.get_json()
    new_name = data.get("newName")
    if not new_name or not new_name.strip():
        return jsonify({"error": "Neuer Name erforderlich"}), 400

    session = Session()
    group = session.query(ClientGroup).filter_by(name=old_name).first()
    if not group:
        session.close()
        return jsonify({"error": "Gruppe nicht gefunden"}), 404

    # Prüfe, ob der neue Name schon existiert
    if session.query(ClientGroup).filter(func.binary(ClientGroup.name) == new_name).first():
        session.close()
        return jsonify({"error": f'Gruppe mit dem Namen "{new_name}" existiert bereits', "duplicate_name": new_name}), 409

    group.name = new_name
    session.commit()
    result = {
        "id": group.id,
        "name": group.name,
        "created_at": group.created_at.isoformat() if group.created_at else None,
        "is_active": group.is_active,
    }
    session.close()
    return jsonify(result)