"""
Generic Parser - Fallback parser for sites without specific implementation
Uses configuration from search_config.py
"""

from bs4 import BeautifulSoup
from urllib.parse import urljoin

from .base_parser import BaseParser, ProductResult
from app.core.search_config import SITE_CONFIGS


class GenericParser(BaseParser):
    """
    Generic parser using configured selectors from search_config.py

    This parser is used as a fallback for sites that don't have
    a specialized parser implementation.
    """

    def __init__(self, site_key: str):
        """
        Initialize with site configuration

        Args:
            site_key: Key in SITE_CONFIGS dict
        """
        config = SITE_CONFIGS.get(site_key)
        if not config:
            raise ValueError(f"Unknown site key: {site_key}")

        super().__init__(
            site_name=config.get("name", site_key),
            base_url=config.get("search_url", "").split("/")[0:3]  # Extract base URL
        )

        self.config = config
        self.site_key = site_key

        # Extract base_url properly
        if "search_url" in config:
            parts = config["search_url"].split("/")
            if len(parts) >= 3:
                self.base_url = f"{parts[0]}//{parts[2]}"

    def parse_search_results(self, html: str, query: str, search_url: str) -> list[ProductResult]:
        """
        Parse search results using configured selectors

        Uses:
        - product_selector: CSS selector for product links
        - product_image_selector: CSS selector for images (optional)
        """
        soup = BeautifulSoup(html, 'html.parser')
        products = []

        # Get product links using configured selector
        product_selector = self.config.get("product_selector")
        if not product_selector:
            self.logger.error(f"No product_selector configured for {self.site_key}")
            return []

        links = soup.select(product_selector)

        if not links:
            self.logger.warning(f"No products found for {self.site_key} with selector: {product_selector}")
            return []

        self.logger.info(f"Found {len(links)} product links for {self.site_name}")

        seen_urls = set()

        for link in links:
            try:
                href = link.get("href")
                if not href:
                    continue

                full_url = urljoin(search_url, href)

                if full_url in seen_urls:
                    continue
                seen_urls.add(full_url)

                # Extract title
                title = link.get_text(strip=True)

                # Fallback: try title attribute or alt in img
                if not title:
                    title = link.get("title", "")
                if not title:
                    img = link.find("img")
                    if img:
                        title = img.get("alt", "")

                if not title or len(title) < 3:
                    continue

                # Filter by query (relaxed: at least one word match)
                if not self.filter_by_query(title, query, strict=False):
                    continue

                # Extract image using configured selector
                image_url = None
                image_selector = self.config.get("product_image_selector")

                if image_selector:
                    # Try in link first
                    img_elem = link.select_one(image_selector)

                    # Try in parent container
                    if not img_elem:
                        parent = link.find_parent(["article", "li", "div"])
                        if parent:
                            img_elem = parent.select_one(image_selector)

                    if img_elem:
                        image_url = self._get_image_src(img_elem)

                # Fallback: any img in link or parent
                if not image_url:
                    img = link.find("img")
                    if img:
                        image_url = self._get_image_src(img)

                    if not image_url:
                        parent = link.find_parent(["article", "li", "div"])
                        if parent:
                            img = parent.find("img")
                            if img:
                                image_url = self._get_image_src(img)

                # Make image URL absolute
                if image_url:
                    # Skip invalid images
                    if image_url.startswith("data:") or "1x1" in image_url or "placeholder" in image_url.lower():
                        image_url = None
                    else:
                        image_url = urljoin(search_url, image_url)

                products.append(ProductResult(
                    title=title,
                    url=full_url,
                    source=self.site_name,
                    image_url=image_url,
                    currency="EUR",
                    snippet=f"Product from {self.site_name}"
                ))

            except Exception as e:
                self.logger.error(f"Error parsing product from {self.site_key}: {e}")
                continue

        self.logger.info(f"Extracted {len(products)} products from {self.site_name}")
        return products