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

api_product = Blueprint('api_product', __name__, url_prefix='/products')

def clean_filter_value(value):
    """Очищает значение фильтра от мусора. Возвращает очищенное значение или None, если оно пустое."""
    if value is None:
        return None
    if isinstance(value, str):
        cleaned = value.strip().rstrip('/')
        if not cleaned:
            return None
        return cleaned
    return value

@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

        # ✅ ИСПРАВЛЕННЫЙ МАППИНГ
        filter_mapping = {
            'attr_1': 'diameter',
            'attr_2': 'length',
            'attr_3': 'wall_thickness',   # (опционально) тоже толщина
            'attr_4': 'color',
            'attr_5': 'stiffness_class',   # SN2, SN4
            'attr_6': 'wall_thickness',    # <- теперь attr_6 ищет толщину стенки
            '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

            real_key = filter_mapping.get(key, key)

            if ',' in value:
                parts = value.split(',')
                cleaned_parts = []
                for part in parts:
                    cleaned = clean_filter_value(part)
                    if cleaned is not None:
                        cleaned_parts.append(cleaned)
                if cleaned_parts:
                    filters[real_key] = cleaned_parts
            else:
                cleaned = clean_filter_value(value)
                if cleaned is not None:
                    filters[real_key] = cleaned

        # Отладочный вывод (убедитесь, что здесь видно правильный ключ)
        print("=== FINAL FILTERS ===", filters)

        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):
    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():
    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