"""
通讯录子图节点 - 完善版（使用API客户端）
Contact Subgraph Nodes - Complete (with API Client)
"""

from typing import Dict, Any
from datetime import datetime

from .state import ContactState, ContactAction, Contact, Email
from .api_client import contact_api


# 模拟联系人数据库（临时存储）
CONTACT_DB = {}


def parse_intent(state: ContactState) -> ContactState:
    """
    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（真实场景应该用LLM）
    # 优先匹配：添加联系人
    if any(keyword in query_lower for keyword in ["添加", "add", "新建", "save"]):
        state.action = ContactAction.CONTACT_ADD
    
    elif any(keyword in query_lower for keyword in ["联系人", "contact", "list"]):
        state.action = ContactAction.CONTACT_LIST
        state.action_params = {"query": state.user_query}
    
    elif any(keyword in query_lower for keyword in ["邮件", "email", "inbox"]):
        state.action = ContactAction.EMAIL_LIST
    
    elif any(keyword in query_lower for keyword in ["发送邮件", "send email", "发邮件"]):
        state.action = ContactAction.EMAIL_SEND
    
    else:
        state.action = ContactAction.SNIFF_CONTACTS
    
    return state


def list_contacts(state: ContactState) -> ContactState:
    """
    列出联系人节点
    """
    state.current_phase = "listing_contacts"
    
    # 使用API客户端获取联系人
    state.contacts = contact_api.list_contacts_mock(state.user_id)
    state.success = True
    
    return state


def add_contact(state: ContactState) -> ContactState:
    """
    添加联系人节点
    """
    state.current_phase = "adding_contact"
    
    # 从查询中提取联系人信息（简化版）
    query = state.user_query
    contact_data = contact_api.extract_contact_info_mock(query)
    
    if contact_data:
        new_contact = Contact(**contact_data)
        contact_api.save_contact_mock(state.user_id, new_contact)
        state.current_contact = new_contact
        state.success = True
        state.final_result = f"✅ 联系人 {new_contact.name} 添加成功"
    else:
        state.success = False
        state.error_message = "无法从查询中提取联系人信息"
    
    return state


def list_emails(state: ContactState) -> ContactState:
    """
    列出邮件节点
    """
    state.current_phase = "listing_emails"
    
    # 使用API客户端获取邮件
    state.emails = contact_api.list_emails_mock()
    state.success = True
    
    return state


def generate_email_draft(state: ContactState) -> ContactState:
    """
    生成邮件草稿节点
    """
    state.current_phase = "generating_draft"
    
    # 使用API客户端生成邮件草稿
    draft = contact_api.generate_email_draft_mock(state.user_query)
    
    state.draft_subject = draft.get("subject", "")
    state.draft_recipient = draft.get("recipient", "")
    state.draft_body = draft.get("body", "")
    
    # 进入人工审核状态
    state.pending_review = True
    state.review_type = "email_send"
    state.review_prompt = "请确认是否发送此邮件"
    
    return state


def human_review(state: ContactState) -> ContactState:
    """
    人工审核节点
    这里会让用户确认/修改
    """
    state.current_phase = "reviewing"
    
    # 注意：真实的LangGraph会在这里使用interrupt()暂停
    # 这里我们只设置状态，让外层处理
    if state.review_approved is True:
        state.pending_review = False
    elif state.review_approved is False:
        state.pending_review = False
        state.error_message = "发送已取消"
        state.success = False
    
    return state


def send_email(state: ContactState) -> ContactState:
    """
    发送邮件节点
    """
    state.current_phase = "sending_email"
    
    # 使用API客户端发送邮件
    result = contact_api.send_email_mock(
        state.draft_recipient,
        state.draft_subject,
        state.draft_body
    )
    
    if result.get("success"):
        state.success = True
        state.final_result = "✅ 邮件发送成功"
    else:
        state.success = False
        state.error_message = "邮件发送失败"
    
    return state


def sniff_contacts(state: ContactState) -> ContactState:
    """
    智能嗅探节点
    从对话中提取可能的联系人信息
    """
    state.current_phase = "sniffing"
    
    # 使用API客户端智能嗅探
    sniffed = contact_api.sniff_contacts_mock(state.user_query)
    
    state.sniff_result = sniffed
    if sniffed.get("contacts"):
        state.sniffed_contacts = [
            Contact(**contact) for contact in sniffed.get("contacts")
        ]
        state.sniff_confirmation_pending = True
    
    state.success = True
    
    return state


def format_result(state: ContactState) -> ContactState:
    """
    格式化结果节点 - 精美展示
    """
    state.current_phase = "formatting"
    
    # 根据不同action生成不同的格式化输出
    if state.action == ContactAction.CONTACT_LIST:
        result = []
        result.append("═══════════════════════════════════════════")
        result.append("📇 联系人列表")
        result.append("═══════════════════════════════════════════")
        result.append("")
        
        if state.contacts:
            for i, contact in enumerate(state.contacts, 1):
                result.append(f"{i}. {contact.name}")
                if contact.phone:
                    result.append(f"   📞 电话：{contact.phone}")
                if contact.email:
                    result.append(f"   📧 邮箱：{contact.email}")
                if contact.company:
                    result.append(f"   🏢 公司：{contact.company}")
                result.append("")
        else:
            result.append("   暂无联系人")
            result.append("")
        
        result.append("═══════════════════════════════════════════")
        result.append("💡 提示：添加联系人 张三 13800138000 zhangsan@example.com")
        
        state.final_result = "\n".join(result)
    
    elif state.action == ContactAction.CONTACT_ADD:
        if state.final_result:
            state.final_result = state.final_result
        else:
            result = []
            result.append("═══════════════════════════════════════════")
            result.append("📇 添加联系人")
            result.append("═══════════════════════════════════════════")
            result.append("")
            result.append("   ✅ 联系人添加成功")
            result.append("")
            result.append("═══════════════════════════════════════════")
            state.final_result = "\n".join(result)
    
    elif state.action == ContactAction.EMAIL_LIST:
        result = []
        result.append("═══════════════════════════════════════════")
        result.append("📧 邮件列表")
        result.append("═══════════════════════════════════════════")
        result.append("")
        
        if state.emails:
            for i, email in enumerate(state.emails[:10], 1):
                result.append(f"{i}. {email.subject}")
                result.append(f"   👤 发件人：{email.sender}")
                if email.date:
                    result.append(f"   📅 日期：{email.date}")
                result.append("")
        else:
            result.append("   暂无邮件")
            result.append("")
        
        result.append("═══════════════════════════════════════════")
        state.final_result = "\n".join(result)
    
    elif state.action == ContactAction.EMAIL_SEND and state.pending_review:
        result = []
        result.append("═══════════════════════════════════════════")
        result.append("📧 邮件草稿（待审核）")
        result.append("═══════════════════════════════════════════")
        result.append("")
        result.append(f"📌 主题：{state.draft_subject}")
        result.append(f"👤 收件人：{state.draft_recipient}")
        result.append("")
        result.append("📝 内容：")
        result.append(state.draft_body)
        result.append("")
        result.append("═══════════════════════════════════════════")
        result.append("💡 提示：确认发送/取消/修改内容")
        
        state.final_result = "\n".join(result)
    
    elif state.sniff_result and state.sniffed_contacts:
        result = []
        result.append("═══════════════════════════════════════════")
        result.append("🕵️ 智能嗅探结果")
        result.append("═══════════════════════════════════════════")
        result.append("")
        result.append(f"   发现 {len(state.sniffed_contacts)} 个可能的联系人：")
        result.append("")
        
        for i, contact in enumerate(state.sniffed_contacts, 1):
            result.append(f"{i}. {contact.name}")
            if contact.phone:
                result.append(f"   📞 电话：{contact.phone}")
            if contact.email:
                result.append(f"   📧 邮箱：{contact.email}")
            result.append("")
        
        result.append("═══════════════════════════════════════════")
        state.final_result = "\n".join(result)
    
    else:
        if not state.final_result:
            state.final_result = "通讯录操作完成"
    
    state.current_phase = "done"
    return state


def should_continue(state: ContactState) -> str:
    """
    条件路由：决定下一步该做什么
    """
    if state.error_message:
        return "format_result"
    
    # 如果在审核中，等待
    if state.pending_review:
        return "format_result"
    
    # 根据action路由
    if state.action == ContactAction.NONE:
        return "parse_intent"
    elif state.action == ContactAction.CONTACT_LIST:
        return "list_contacts"
    elif state.action == ContactAction.CONTACT_ADD:
        return "add_contact"
    elif state.action == ContactAction.EMAIL_LIST:
        return "list_emails"
    elif state.action == ContactAction.EMAIL_SEND:
        if state.pending_review:
            return "format_result"
        elif state.draft_subject and not state.pending_review:
            return "send_email"
        else:
            return "generate_email_draft"
    elif state.action == ContactAction.SNIFF_CONTACTS:
        return "sniff_contacts"
    else:
        return "format_result"