import logging
from typing import Any, Dict
from modules.chat.methodBase import MethodBase, action
from modules.interfaces.interfaceChatModel import ActionResult
from modules.interfaces.interface_web_objects import WebInterface
from modules.interfaces.interface_web_model import (
    WebSearchRequest,
    WebCrawlRequest,
    WebScrapeRequest,
)


logger = logging.getLogger(__name__)


class MethodWeb(MethodBase):
    """Web method implementation for web operations."""

    def __init__(self, serviceCenter: Any):
        super().__init__(serviceCenter)
        self.name = "web"
        self.description = "Web search, crawling, and scraping operations using Tavily"

    @action
    async def search(self, parameters: Dict[str, Any]) -> ActionResult:
        """Perform a web search and outputs a .json file with a list of found URLs.

        Each result contains "title" and "url".

        Parameters:
            query (str): Search query to perform
            maxResults (int, optional): Maximum number of results (default: 10)
        """
        # TODO: Fix docstrings - do we need that format for parsing?

        try:
            # Prepare request data
            web_search_request = WebSearchRequest(
                query=parameters.get("query"),
                max_results=parameters.get("maxResults", 10),
            )

            # Perform request
            web_interface = await WebInterface.create()
            web_search_result = await web_interface.search(web_search_request)

            return web_search_result

        except Exception as e:
            return ActionResult(success=False, error=str(e))

    @action
    async def crawl(self, parameters: Dict[str, Any]) -> ActionResult:
        """Crawls a list of URLs and extracts information from them.

        Parameters:
            document (str): Document reference containing URL list from search results
            expectedDocumentFormats (list, optional): Expected document formats with extension, mimeType, description
        """
        try:
            document_ref = parameters.get("document")

            if not document_ref:
                return ActionResult(
                    success=False, error="No document reference provided."
                )

            # Resolve document reference to ChatDocument objects
            chat_documents = self.service.getChatDocumentsFromDocumentList(
                [document_ref]
            )

            if not chat_documents:
                return ActionResult(
                    success=False,
                    error=f"No documents found for reference: {document_ref}",
                )

            # Get the first document (search results)
            search_doc = chat_documents[0]

            # Get file data using the service center
            file_data = self.service.getFileData(search_doc.fileId)
            if not file_data:
                return ActionResult(
                    success=False, error="Could not retrieve file data for document"
                )

            content = file_data.decode("utf-8")

            # Parse JSON to extract URLs from search results
            import json

            try:
                # The document structure from WebSearchActionResult
                search_data = json.loads(content)

                # Extract URLs from the search results structure
                urls = []
                if isinstance(search_data, dict):
                    # Handle the document structure: documentData contains the actual search results
                    doc_data = search_data.get("documentData", search_data)
                    if "results" in doc_data and isinstance(doc_data["results"], list):
                        urls = [
                            result["url"]
                            for result in doc_data["results"]
                            if isinstance(result, dict) and "url" in result
                        ]
                    elif "urls" in doc_data and isinstance(doc_data["urls"], list):
                        # Fallback: if URLs are stored directly in a 'urls' field
                        urls = [url for url in doc_data["urls"] if isinstance(url, str)]

                # Fallback: try to parse as plain text with regex (for backward compatibility)
                if not urls:
                    logger.warning(
                        "Could not extract URLs from JSON structure, trying plain text parsing"
                    )
                    import re

                    urls = re.split(r"[\n,;]+", content)
                    urls = [
                        u.strip()
                        for u in urls
                        if u.strip()
                        and (
                            u.strip().startswith("http://")
                            or u.strip().startswith("https://")
                        )
                    ]

            except json.JSONDecodeError:
                # Fallback to plain text parsing if JSON parsing fails
                logger.warning("Document is not valid JSON, trying plain text parsing")
                import re

                urls = re.split(r"[\n,;]+", content)
                urls = [
                    u.strip()
                    for u in urls
                    if u.strip()
                    and (
                        u.strip().startswith("http://")
                        or u.strip().startswith("https://")
                    )
                ]

            if not urls:
                return ActionResult(
                    success=False, error="No valid URLs found in the document."
                )

            logger.info(f"Extracted {len(urls)} URLs from document: {urls}")

            # Prepare request data
            web_crawl_request = WebCrawlRequest(urls=urls)

            # Perform request
            web_interface = await WebInterface.create()
            web_crawl_result = await web_interface.crawl(web_crawl_request)

            return web_crawl_result

        except Exception as e:
            logger.error(f"Error in crawl method: {str(e)}")
            return ActionResult(success=False, error=str(e))

    @action
    async def scrape(self, parameters: Dict[str, Any]) -> ActionResult:
        """Scrapes web content by searching for URLs and then extracting their content.

        Combines search and crawl operations in one step.

        Parameters:
            query (str): Search query to perform
            maxResults (int, optional): Maximum number of results (default: 10)
        """
        try:
            query = parameters.get("query")
            max_results = parameters.get("maxResults", 10)

            if not query:
                return ActionResult(success=False, error="Search query is required")

            # Prepare request data
            web_scrape_request = WebScrapeRequest(
                query=query,
                max_results=max_results,
            )

            # Perform request
            web_interface = await WebInterface.create()
            web_scrape_result = await web_interface.scrape(web_scrape_request)

            return web_scrape_result

        except Exception as e:
            return ActionResult(success=False, error=str(e))