"""
Wikipedia Tool - Search and retrieve Wikipedia articles

Free API with no authentication required.
Rate limit: Be respectful, no strict limits.
"""

from __future__ import annotations

import logging
from typing import Optional

import requests

log = logging.getLogger(__name__)

WIKIPEDIA_API = "https://en.wikipedia.org/w/api.php"


def wikipedia_search(
    query: str,
    limit: int = 5,
) -> dict:
    """
    Search Wikipedia for articles matching the query.

    Args:
        query: Search query
        limit: Maximum number of results (default: 5)

    Returns:
        Dictionary with search results
    """
    try:
        params = {
            "action": "query",
            "list": "search",
            "srsearch": query,
            "srlimit": limit,
            "format": "json",
            "utf8": 1,
        }

        response = requests.get(WIKIPEDIA_API, params=params, timeout=10)
        response.raise_for_status()
        data = response.json()

        results = []
        for item in data.get("query", {}).get("search", []):
            results.append({
                "title": item.get("title", ""),
                "pageid": item.get("pageid", 0),
                "snippet": item.get("snippet", "").replace("<span class=\"searchmatch\">", "").replace("</span>", ""),
                "wordcount": item.get("wordcount", 0),
                "url": f"https://en.wikipedia.org/?curid={item.get('pageid', 0)}",
            })

        return {
            "success": True,
            "source": "wikipedia",
            "query": query,
            "results": results,
            "count": len(results),
        }

    except Exception as e:
        log.error(f"Wikipedia search failed: {e}")
        return {
            "success": False,
            "error": str(e),
            "source": "wikipedia",
        }


def wikipedia_get_article(
    title: str,
    sentences: int = 10,
) -> dict:
    """
    Get the content of a Wikipedia article.

    Args:
        title: Article title (exact match or pageid)
        sentences: Number of sentences to return (default: 10, max: 50)

    Returns:
        Dictionary with article content
    """
    try:
        params = {
            "action": "query",
            "prop": "extracts",
            "exsentences": min(sentences, 50),
            "exintro": True,
            "explaintext": True,
            "titles": title,
            "format": "json",
            "utf8": 1,
            "redirects": 1,
        }

        response = requests.get(WIKIPEDIA_API, params=params, timeout=10)
        response.raise_for_status()
        data = response.json()

        pages = data.get("query", {}).get("pages", {})
        articles = []

        for page_id, page_data in pages.items():
            if page_id != "-1":  # -1 means page not found
                articles.append({
                    "title": page_data.get("title", ""),
                    "pageid": page_id,
                    "extract": page_data.get("extract", ""),
                    "url": f"https://en.wikipedia.org/?curid={page_id}",
                })

        if not articles:
            return {
                "success": False,
                "error": f"Article not found: {title}",
                "source": "wikipedia",
            }

        return {
            "success": True,
            "source": "wikipedia",
            "articles": articles,
            "count": len(articles),
        }

    except Exception as e:
        log.error(f"Wikipedia article fetch failed: {e}")
        return {
            "success": False,
            "error": str(e),
            "source": "wikipedia",
        }


def wikipedia_get_full_article(
    title: str,
) -> dict:
    """
    Get the full content of a Wikipedia article.

    Args:
        title: Article title

    Returns:
        Dictionary with full article content
    """
    try:
        params = {
            "action": "query",
            "prop": "extracts",
            "explaintext": True,
            "titles": title,
            "format": "json",
            "utf8": 1,
            "redirects": 1,
        }

        response = requests.get(WIKIPEDIA_API, params=params, timeout=15)
        response.raise_for_status()
        data = response.json()

        pages = data.get("query", {}).get("pages", {})

        for page_id, page_data in pages.items():
            if page_id != "-1":
                return {
                    "success": True,
                    "source": "wikipedia",
                    "title": page_data.get("title", ""),
                    "pageid": page_id,
                    "content": page_data.get("extract", ""),
                    "url": f"https://en.wikipedia.org/?curid={page_id}",
                }

        return {
            "success": False,
            "error": f"Article not found: {title}",
            "source": "wikipedia",
        }

    except Exception as e:
        log.error(f"Wikipedia full article fetch failed: {e}")
        return {
            "success": False,
            "error": str(e),
            "source": "wikipedia",
        }


# Tool schemas for OpenAI function calling
WIKIPEDIA_SEARCH_SCHEMA = {
    "type": "function",
    "function": {
        "name": "wikipedia_search",
        "description": "Search Wikipedia for articles matching a query. Returns a list of article titles and snippets.",
        "parameters": {
            "type": "object",
            "properties": {
                "query": {
                    "type": "string",
                    "description": "The search query",
                },
                "limit": {
                    "type": "integer",
                    "description": "Maximum number of results to return (default: 5)",
                    "default": 5,
                },
            },
            "required": ["query"],
        },
    },
}

WIKIPEDIA_GET_ARTICLE_SCHEMA = {
    "type": "function",
    "function": {
        "name": "wikipedia_get_article",
        "description": "Get the introduction/summary of a Wikipedia article. Use this after wikipedia_search to get more details.",
        "parameters": {
            "type": "object",
            "properties": {
                "title": {
                    "type": "string",
                    "description": "The exact article title from search results",
                },
                "sentences": {
                    "type": "integer",
                    "description": "Number of sentences to return (default: 10)",
                    "default": 10,
                },
            },
            "required": ["title"],
        },
    },
}

WIKIPEDIA_GET_FULL_ARTICLE_SCHEMA = {
    "type": "function",
    "function": {
        "name": "wikipedia_get_full_article",
        "description": "Get the full content of a Wikipedia article. Use for comprehensive research when the summary is not enough.",
        "parameters": {
            "type": "object",
            "properties": {
                "title": {
                    "type": "string",
                    "description": "The exact article title",
                },
            },
            "required": ["title"],
        },
    },
}