"""
资讯子图节点 - 使用公共工具版本
News Analysis Subgraph Nodes - Using Common Tools
"""

from typing import Dict, Any
from datetime import datetime

# 公共工具
from ..common import MarkdownFormatter

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


def parse_intent(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    解析用户意图节点
    确定用户想做什么操作
    """
    query_lower = state.user_query.lower()
    
    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:
        state.action = NewsAction.QUERY_NEWS
    
    return state


def query_news(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    查询资讯节点
    """
    state.current_phase = "executing"
    
    # 使用 API 客户端
    news_items = news_api.query_news(state.user_query)
    state.news_items = news_items
    
    return state


def analyze_url(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    分析 URL 节点
    """
    state.current_phase = "executing"
    
    # 从用户输入中提取 URL（简单处理）
    query = state.user_query
    url = query
    for keyword in ["分析", "analyze", "url", "链接"]:
        url = url.replace(keyword, "").strip()
    
    if not url:
        url = "https://example.com/news/article"
    
    state.custom_urls = [url]
    
    # 使用 API 客户端
    analysis = news_api.analyze_url(url)
    state.analysis = analysis
    
    return state


def extract_keywords(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    提取关键词节点
    """
    state.current_phase = "executing"
    
    # 使用 API 客户端
    keywords = news_api.extract_keywords(state.user_query)
    state.extracted_keywords = keywords
    
    return state


def generate_report(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    生成报告节点
    """
    state.current_phase = "executing"
    
    # 使用 API 客户端
    report = news_api.generate_report(state.user_query)
    state.report_content = report
    
    return state


def format_result(state: NewsAnalysisState) -> NewsAnalysisState:
    """
    格式化结果节点（使用公共工具）
    """
    state.current_phase = "formatting"
    
    md = MarkdownFormatter()
    output_lines = []
    
    output_lines.append("┌───────────────────────────────────┐")
    output_lines.append("│          📰 资讯助手               │")
    output_lines.append("└───────────────────────────────────┘")
    output_lines.append("")
    
    if state.action == NewsAction.QUERY_NEWS and state.news_items:
        output_lines.append(md.heading("📰 最新资讯", 2))
        output_lines.append("")
        
        for item in state.news_items:
            output_lines.append(md.heading(item.title, 3))
            output_lines.append(f"> 来源: {item.source.value}")
            output_lines.append(f"> 时间: {item.published_at.strftime('%Y-%m-%d %H:%M')}")
            if item.summary:
                output_lines.append("")
                output_lines.append(item.summary)
            if item.url:
                output_lines.append(f"🔗 链接: {md.link(item.title, item.url)}")
            output_lines.append("")
    
    elif state.action == NewsAction.EXTRACT_KEYWORDS and state.extracted_keywords:
        output_lines.append(md.heading("🏷️ 提取的关键词", 2))
        output_lines.append("")
        keywords_data = [
            {"关键词": k, "权重": f"{w:.2f}"}
            for k, w in state.extracted_keywords.items()
        ]
        output_lines.append(md.table(keywords_data))
    
    elif state.action == NewsAction.GENERATE_REPORT and state.report_content:
        output_lines.append(md.heading("📊 分析报告", 2))
        output_lines.append("")
        output_lines.append(state.report_content)
    
    elif state.action == NewsAction.ANALYZE_URL and state.analysis:
        output_lines.append(md.heading("🔍 URL 分析", 2))
        output_lines.append("")
        output_lines.append(f"> URL: {state.custom_urls[0]}")
        output_lines.append("")
        output_lines.append(state.analysis)
    
    else:
        output_lines.append(md.heading("✨ 操作完成", 2))
        output_lines.append("您的请求已处理。")
    
    # 页脚提示
    output_lines.append("")
    output_lines.append("---")
    output_lines.append("💡 提示：您可以继续查询资讯、提取关键词或者生成报告！")
    
    state.final_result = "\n".join(output_lines)
    state.success = True
    state.current_phase = "completed"

    return state


def should_continue(state: NewsAnalysisState) -> str:
    """
    条件路由函数：根据 action 决定下一个节点
    """
    action = state.action
    if action == NewsAction.QUERY:
        return "query_news"
    elif action == NewsAction.ANALYZE_URL:
        return "analyze_url"
    elif action == NewsAction.EXTRACT_KEYWORDS:
        return "extract_keywords"
    elif action == NewsAction.GENERATE_REPORT:
        return "generate_report"
    else:
        return "format_result"