"""
资讯子图节点
News Analysis Subgraph Nodes
"""

from typing import Dict, Any
from datetime import datetime

from .state import (
    NewsAnalysisState,
    NewsAction,
    NewsItem,
    NewsSource
)


def parse_intent(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    解析用户意图节点
    确定用户想做什么操作
    """
    state.current_phase = "intent_parsing"
    
    query_lower = state.user_query.lower()
    
    # 简单的关键词匹配
    if any(keyword in query_lower for keyword in ["资讯", "新闻", "news", "report"]):
        state.action = NewsAction.QUERY_NEWS
    
    elif any(keyword in query_lower for keyword in ["分析", "analyze", "url", "链接"]):
        state.action = NewsAction.ANALYZE_URL
    
    elif any(keyword in query_lower for keyword in ["关键词", "keyword", "提取"]):
        state.action = NewsAction.EXTRACT_KEYWORDS
    
    elif any(keyword in query_lower for keyword in ["报告", "生成", "generate"]):
        state.action = NewsAction.GENERATE_REPORT
    
    else:
        # 默认查询资讯
        state.action = NewsAction.QUERY_NEWS
    
    return state


def query_news(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    查询资讯节点
    """
    state.current_phase = "querying_news"
    
    # TODO: 调用资讯API或爬取
    query = state.user_query
    
    # 模拟返回结果
    state.news_items = [
        NewsItem(
            title=f"关于 {query} 的资讯1",
            source="Tech News",
            summary="这是一条关于人工智能的资讯摘要...",
            keywords=[query, "AI", "Technology"]
        ),
        NewsItem(
            title=f"关于 {query} 的资讯2",
            source="Business Daily",
            summary="行业动态：AI在商业中的应用...",
            keywords=[query, "Business", "Innovation"]
        )
    ]
    
    state.success = True
    return state


def analyze_url(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    分析资讯URL节点
    """
    state.current_phase = "analyzing_url"
    
    # TODO: 调用URL分析API
    urls = state.custom_urls or [state.action_params.get("url", "")]
    
    # 模拟返回结果
    for url in urls:
        if url:
            state.news_items.append(
                NewsItem(
                    title=f"分析结果：{url}",
                    source="URL Analyzer",
                    summary="已完成对该URL的内容分析...",
                    keywords=["News", "Analysis"]
                )
            )
    
    state.success = True
    return state


def extract_keywords(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    提取关键词节点
    """
    state.current_phase = "extracting_keywords"
    
    # TODO: 调用关键词提取API
    text = state.user_query
    
    # 模拟返回结果
    state.extracted_keywords = ["AI", "大模型", "应用场景", "行业趋势"]
    
    state.success = True
    return state


def generate_report(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    生成报告节点
    """
    state.current_phase = "generating_report"
    
    # TODO: 生成完整报告
    query = state.user_query
    
    report = f"""📊 资讯分析报告
    
主题：{query}

📋 摘要：
这是一份关于 {query} 的资讯分析综合报告，包含最新行业动态和趋势分析。

🔍 主要发现：
1. AI技术持续快速发展
2. 大模型应用场景不断拓展
3. 行业数字化转型加速

🏷️ 关键词：
- AI
- 大模型
- 数字化转型
- 创新
"""
    
    state.report_content = report
    state.success = True
    return state


def format_result(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    格式化结果节点
    """
    state.current_phase = "formatting"
    
    if state.action == NewsAction.QUERY_NEWS and state.news_items:
        result = "📰 最新资讯\n\n"
        for i, item in enumerate(state.news_items, 1):
            result += f"{i}. {item.title}\n"
            result += f"   来源：{item.source}\n"
            result += f"   摘要：{item.summary}\n\n"
        
        state.final_result = result
    
    elif state.action == NewsAction.ANALYZE_URL and state.news_items:
        result = "🔍 资讯分析结果\n\n"
        for i, item in enumerate(state.news_items, 1):
            result += f"{i}. {item.title}\n"
            result += f"   {item.summary}\n\n"
        
        state.final_result = result
    
    elif state.action == NewsAction.EXTRACT_KEYWORDS and state.extracted_keywords:
        result = "🏷️ 提取的关键词\n\n"
        result += ", ".join(state.extracted_keywords)
        state.final_result = result
    
    elif state.action == NewsAction.GENERATE_REPORT and state.report_content:
        state.final_result = state.report_content
    
    else:
        if not state.final_result:
            state.final_result = "资讯操作完成"
    
    state.current_phase = "done"
    return state


def should_continue(state: NewsAnalysisState) -> str:
    """
    条件路由：决定下一步该做什么
    """
    if state.error_message:
        return "format_result"
    
    # 根据action路由
    if state.action == NewsAction.NONE:
        return "parse_intent"
    elif state.action == NewsAction.QUERY_NEWS:
        return "query_news"
    elif state.action == NewsAction.ANALYZE_URL:
        return "analyze_url"
    elif state.action == NewsAction.EXTRACT_KEYWORDS:
        return "extract_keywords"
    elif state.action == NewsAction.GENERATE_REPORT:
        return "generate_report"
    else:
        return "format_result"