"""CLI 에이전트용 커스텀 도구 모음입니다.

Custom tools for the CLI agent.
"""

# NOTE(KR): 이 파일의 `http_request` / `web_search` / `fetch_url` 함수 docstring은
# LangChain tool description으로 사용될 수 있으므로 번역/수정하지 마세요(영어 유지).

from typing import Any, Literal

import requests
from markdownify import markdownify
from tavily import TavilyClient

from deepagents_cli.config import settings

_HTTP_ERROR_STATUS_CODE_MIN = 400

# Initialize Tavily client if API key is available
tavily_client = TavilyClient(api_key=settings.tavily_api_key) if settings.has_tavily else None


def http_request(
    url: str,
    method: str = "GET",
    headers: dict[str, str] | None = None,
    data: str | dict | None = None,
    params: dict[str, str] | None = None,
    timeout: int = 30,
) -> dict[str, Any]:
    """Make HTTP requests to APIs and web services.

    Args:
        url: Target URL
        method: HTTP method (GET, POST, PUT, DELETE, etc.)
        headers: HTTP headers to include
        data: Request body data (string or dict)
        params: URL query parameters
        timeout: Request timeout in seconds

    Returns:
        Dictionary with response data including status, headers, and content
    """
    try:
        json_data: dict[str, Any] | None = None
        body_data: str | None = None
        if data is not None:
            if isinstance(data, dict):
                json_data = data
            else:
                body_data = data

        response = requests.request(
            method=method.upper(),
            url=url,
            headers=headers,
            params=params,
            data=body_data,
            json=json_data,
            timeout=timeout,
        )

        try:
            content = response.json()
        except ValueError:
            content = response.text

        return {
            "success": response.status_code < _HTTP_ERROR_STATUS_CODE_MIN,
            "status_code": response.status_code,
            "headers": dict(response.headers),
            "content": content,
            "url": response.url,
        }

    except requests.exceptions.Timeout:
        return {
            "success": False,
            "status_code": 0,
            "headers": {},
            "content": f"Request timed out after {timeout} seconds",
            "url": url,
        }
    except requests.exceptions.RequestException as e:
        return {
            "success": False,
            "status_code": 0,
            "headers": {},
            "content": f"Request error: {e!s}",
            "url": url,
        }
    except Exception as e:  # noqa: BLE001
        return {
            "success": False,
            "status_code": 0,
            "headers": {},
            "content": f"Error making request: {e!s}",
            "url": url,
        }


def web_search(
    query: str,
    *,
    max_results: int = 5,
    topic: Literal["general", "news", "finance"] = "general",
    include_raw_content: bool = False,
) -> dict[str, Any]:
    """Search the web using Tavily for current information and documentation.

    This tool searches the web and returns relevant results. After receiving results,
    you MUST synthesize the information into a natural, helpful response for the user.

    Args:
        query: The search query (be specific and detailed)
        max_results: Number of results to return (default: 5)
        topic: Search topic type - "general" for most queries, "news" for current events
        include_raw_content: Include full page content (warning: uses more tokens)

    Returns:
        Dictionary containing:
        - results: List of search results, each with:
            - title: Page title
            - url: Page URL
            - content: Relevant excerpt from the page
            - score: Relevance score (0-1)
        - query: The original search query

    IMPORTANT: After using this tool:
    1. Read through the 'content' field of each result
    2. Extract relevant information that answers the user's question
    3. Synthesize this into a clear, natural language response
    4. Cite sources by mentioning the page titles or URLs
    5. NEVER show the raw JSON to the user - always provide a formatted response
    """
    if tavily_client is None:
        return {
            "error": (
                "Tavily API key not configured. Please set TAVILY_API_KEY environment variable."
            ),
            "query": query,
        }

    try:
        return tavily_client.search(
            query,
            max_results=max_results,
            include_raw_content=include_raw_content,
            topic=topic,
        )
    except Exception as e:  # noqa: BLE001
        return {"error": f"Web search error: {e!s}", "query": query}


def fetch_url(url: str, timeout: int = 30) -> dict[str, Any]:
    """Fetch content from a URL and convert HTML to markdown format.

    This tool fetches web page content and converts it to clean markdown text,
    making it easy to read and process HTML content. After receiving the markdown,
    you MUST synthesize the information into a natural, helpful response for the user.

    Args:
        url: The URL to fetch (must be a valid HTTP/HTTPS URL)
        timeout: Request timeout in seconds (default: 30)

    Returns:
        Dictionary containing:
        - success: Whether the request succeeded
        - url: The final URL after redirects
        - markdown_content: The page content converted to markdown
        - status_code: HTTP status code
        - content_length: Length of the markdown content in characters

    IMPORTANT: After using this tool:
    1. Read through the markdown content
    2. Extract relevant information that answers the user's question
    3. Synthesize this into a clear, natural language response
    4. NEVER show the raw markdown to the user unless specifically requested
    """
    try:
        response = requests.get(
            url,
            timeout=timeout,
            headers={"User-Agent": "Mozilla/5.0 (compatible; DeepAgents/1.0)"},
        )
        response.raise_for_status()

        # Convert HTML content to markdown
        markdown_content = markdownify(response.text)

        return {
            "success": True,
            "url": str(response.url),
            "markdown_content": markdown_content,
            "status_code": response.status_code,
            "content_length": len(markdown_content),
        }
    except requests.exceptions.Timeout:
        return {
            "success": False,
            "error": f"Fetch URL timed out after {timeout} seconds",
            "url": url,
        }
    except requests.exceptions.RequestException as e:
        return {"success": False, "error": f"Fetch URL request error: {e!s}", "url": url}
    except Exception as e:  # noqa: BLE001
        return {"success": False, "error": f"Fetch URL error: {e!s}", "url": url}