from flask import jsonify, request
from db.handlers.product_handler import get_products_with_filters, get_product_by_id
from flask import Blueprint

# Создаем blueprint для API
api_product = Blueprint('api_product', __name__, url_prefix='/products')

@api_product.route('/', methods=['GET'], strict_slashes=False)
def get_products():
    try:
        category_id = request.args.get('categoryId', type=int)
        if not category_id:
            return jsonify({"error": "categoryId is required"}), 400

        page = request.args.get('page', 1, type=int)
        limit = request.args.get('limit', 9, type=int)

        if page < 1:
            page = 1
        if limit < 1 or limit > 100:
            limit = 9

        # Словарь для маппинга внешних ключей → внутренние имена в БД
        filter_mapping = {
            'attr_1': 'diameter',
            'attr_2': 'length',
            'attr_3': 'wall_thickness',
            'attr_4': 'color',
            'attr_5': 'application_type',
            'attr_6': 'stiffness_class',
            'attr_7': 'angle',
            'attr_8': 'fitting_type',
        }

        filters = {}
        excluded_params = {'categoryId', 'page', 'limit'}

        for key, value in request.args.items():
            if key in excluded_params:
                continue

            # Преобразуем ключ, если он есть в маппинге, иначе оставляем как есть
            real_key = filter_mapping.get(key, key)

            # Разделяем значения по запятой
            if ',' in value:
                filters[real_key] = value.split(',')
            else:
                filters[real_key] = value

        result = get_products_with_filters(
            category_id=category_id,
            page=page,
            limit=limit,
            filters=filters if filters else None
        )

        return jsonify(result), 200

    except Exception as e:
        return jsonify({"error": str(e)}), 500

@api_product.route('/<int:product_id>', methods=['GET'], strict_slashes=False)
def get_product(product_id):
    """
    Получение товара по ID
    GET /api/products/{id}
    """
    try:
        product = get_product_by_id(product_id)
        if product:
            return jsonify(product), 200
        return jsonify({"error": "Product not found"}), 404
    except Exception as e:
        return jsonify({"error": str(e)}), 500

@api_product.route('/fetchById', methods=['GET'], strict_slashes=False)
def get_product_by_id_param():
    """
    Альтернативный маршрут для получения товара через query параметр
    GET /api/products/fetchById?id=101
    """
    try:
        product_id = request.args.get('id', type=int)
        if not product_id:
            return jsonify({"error": "id parameter is required"}), 400
        
        product = get_product_by_id(product_id)
        if product:
            return jsonify(product), 200
        return jsonify({"error": "Product not found"}), 404
    except Exception as e:
        return jsonify({"error": str(e)}), 500