"""
词典子图节点 - 使用公共工具版本
Dictionary Subgraph Nodes - Using Common Tools
"""

from typing import Dict, Any, List
from datetime import datetime
import random

# 公共工具
from ..common import (
    MarkdownFormatter
)

from .state import (
    DictionaryState,
    DictionaryAction,
    WordEntry,
    ExtractedTerm
)
from .api_client import dictionary_api


# ========== 模拟生词本存储（后续可替换为数据库） ==========
WORD_BOOK_DB: Dict[str, List[Dict]] = {}  # user_id -> [word_entries]


def parse_intent(state: DictionaryState) -> DictionaryState:
    """
    解析用户意图节点（使用规则匹配）
    确定用户想做什么操作
    """
    # 子图特定的意图解析
    query_lower = state.user_query.lower()
    
    if any(keyword in query_lower for keyword in ["翻译", "translate", "英语", "英文"]):
        state.action = DictionaryAction.TRANSLATE
        state.action_params = {"text": state.user_query}
        text = state.user_query
        for keyword in ["翻译", "translate", "英语", "英文"]:
            text = text.replace(keyword, "")
        state.source_text = text.strip()
    elif any(keyword in query_lower for keyword in ["查询", "query", "单词", "word"]):
        state.action = DictionaryAction.QUERY
        state.action_params = {"word": state.user_query}
    elif any(keyword in query_lower for keyword in ["每日", "daily", "一词"]):
        state.action = DictionaryAction.DAILY_WORD
    elif any(keyword in query_lower for keyword in ["提取", "extract", "术语", "term"]):
        state.action = DictionaryAction.EXTRACT
        state.action_params = {"text": state.user_query}
    else:
        state.action = DictionaryAction.QUERY
        state.action_params = {"word": state.user_query}
    
    return state


def query_word(state: DictionaryState) -> DictionaryState:
    """
    查询单词节点
    """
    state.current_phase = "executing"
    
    # 提取要查询的词
    word = state.action_params.get("word", state.user_query)
    # 清理关键词
    for keyword in ["查询", "query", "单词", "word", "翻译", "translate", "英语", "英文"]:
        word = word.replace(keyword, "").strip()
    
    if not word:
        word = "hello"
    
    # 使用 API 客户端
    word_entry = dictionary_api.query_word(word)
    state.word_entry = word_entry
    
    return state


def translate_text(state: DictionaryState) -> DictionaryState:
    """
    翻译文本节点
    """
    state.current_phase = "executing"
    
    text = state.source_text or state.user_query
    if not text:
        # 清理关键词
        for keyword in ["翻译", "translate", "英语", "英文"]:
            text = text.replace(keyword, "").strip()
    
    if not text:
        text = "你好，世界！"
    
    # 使用 API 客户端
    translated = dictionary_api.translate(text)
    state.source_text = text
    state.translated_text = translated
    
    return state


def extract_terms(state: DictionaryState) -> DictionaryState:
    """
    提取术语节点
    """
    state.current_phase = "executing"
    
    text = state.action_params.get("text", state.user_query)
    for keyword in ["提取", "extract", "术语", "term"]:
        text = text.replace(keyword, "").strip()
    
    if not text:
        text = "Python is a great programming language for machine learning and data analysis."
    
    # 使用 API 客户端
    terms = dictionary_api.extract_terms(text)
    state.extracted_terms = terms
    
    return state


def get_daily_word(state: DictionaryState) -> DictionaryState:
    """
    获取每日一词节点
    """
    state.current_phase = "executing"
    
    # 使用 API 客户端
    word_entry = dictionary_api.get_daily_word()
    state.daily_word = word_entry
    
    return state


def lookup_word_book(state: DictionaryState) -> DictionaryState:
    """
    查生词本节点
    """
    state.current_phase = "executing"
    
    user_id = state.user_id or "default"
    if user_id not in WORD_BOOK_DB:
        WORD_BOOK_DB[user_id] = []
    
    state.word_book = WORD_BOOK_DB[user_id]
    
    return state


def add_to_word_book(state: DictionaryState) -> DictionaryState:
    """
    添加到生词本节点
    """
    state.current_phase = "executing"
    
    user_id = state.user_id or "default"
    if user_id not in WORD_BOOK_DB:
        WORD_BOOK_DB[user_id] = []
    
    if state.word_entry:
        entry_dict = {
            "word": state.word_entry.word,
            "phonetic": state.word_entry.phonetic,
            "definition": state.word_entry.definition,
            "added_at": datetime.now().isoformat()
        }
        WORD_BOOK_DB[user_id].append(entry_dict)
    
    return state


def format_result(state: DictionaryState) -> DictionaryState:
    """
    格式化结果节点（使用公共工具）
    生成友好的 Markdown 输出
    """
    state.current_phase = "formatting"
    
    md = MarkdownFormatter()
    output_lines = []
    
    # 标题
    output_lines.append("┌───────────────────────────────────┐")
    output_lines.append("│          📚 词典助手               │")
    output_lines.append("└───────────────────────────────────┘")
    output_lines.append("")
    
    if state.action == DictionaryAction.QUERY and state.word_entry:
        we = state.word_entry
        output_lines.append(md.heading(f"📖 {we.word}", 2))
        if we.phonetic:
            output_lines.append(f"> 🔊 {we.phonetic}")
        output_lines.append("")
        output_lines.append(md.heading("释义", 3))
        output_lines.append(md.bullet_list(we.definition))
        if we.example_sentence:
            output_lines.append("")
            output_lines.append(md.heading("例句", 3))
            output_lines.append(f"> {we.example_sentence}")
    
    elif state.action == DictionaryAction.TRANSLATE and state.translated_text:
        output_lines.append(md.heading("🌐 翻译结果", 2))
        output_lines.append("")
        output_lines.append(md.heading("原文", 3))
        output_lines.append(f"> {state.source_text}")
        output_lines.append("")
        output_lines.append(md.heading("译文", 3))
        output_lines.append(f"> {state.translated_text}")
    
    elif state.action == DictionaryAction.EXTRACT and state.extracted_terms:
        output_lines.append(md.heading("📝 提取的术语", 2))
        output_lines.append("")
        terms_data = [
            {"术语": t.term, "释义": t.definition, "分类": t.category}
            for t in state.extracted_terms
        ]
        output_lines.append(md.table(terms_data))
    
    elif state.action == DictionaryAction.DAILY_WORD and state.daily_word:
        dw = state.daily_word
        output_lines.append(md.heading("🌟 每日一词", 2))
        output_lines.append("")
        output_lines.append(md.heading(f"{dw.word}", 3))
        if dw.phonetic:
            output_lines.append(f"> 🔊 {dw.phonetic}")
        output_lines.append("")
        output_lines.append(md.bullet_list(dw.definition))
    
    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：您可以继续查询其他单词、翻译文本，或者提取术语！")
    
    state.final_result = "\n".join(output_lines)
    state.success = True
    state.current_phase = "completed"

    return state


def should_continue(state: DictionaryState) -> str:
    """
    条件路由函数：根据 action 决定下一个节点
    """
    action = state.action
    if action == DictionaryAction.QUERY:
        return "query_word"
    elif action == DictionaryAction.TRANSLATE:
        return "translate_text"
    elif action == DictionaryAction.EXTRACT:
        return "extract_terms"
    elif action == DictionaryAction.DAILY_WORD:
        return "get_daily_word"
    elif action == DictionaryAction.LOOKUP_WORD_BOOK:
        return "lookup_word_book"
    elif action == DictionaryAction.ADD_TO_WORD_BOOK:
        return "add_to_word_book"
    else:
        return "format_result"
    
    return state