#!/usr/bin/env python
# -*- coding: utf-8 -*-

from typing import Dict, Any, List, Optional
from datetime import datetime
from sqlalchemy.orm import Session
from sqlalchemy import Column, Integer, String, Text, DateTime, Index, ForeignKey
from sqlalchemy.orm import relationship

from cryptoai.models.base import Base, logger
from cryptoai.utils.db_manager import get_db_context
# 定义分析历史模型
class AnalysisHistory(Base):
    """分析历史表模型"""
    __tablename__ = 'analysis_history'

    id = Column(Integer, primary_key=True, autoincrement=True)
    user_id = Column(Integer, ForeignKey('users.id'), nullable=False, comment='用户ID')
    type = Column(String(20), nullable=False, comment='分析类型(crypto, astock)')
    symbol = Column(String(50), nullable=False, comment='交易符号')
    timeframe = Column(String(20), nullable=True, comment='时间框架')
    content = Column(Text, nullable=False, comment='分析内容')
    create_time = Column(DateTime, nullable=False, default=datetime.now, comment='创建时间')
    
    # 关系
    user = relationship("User", back_populates="analysis_histories")
    
    # 索引和表属性
    __table_args__ = (
        Index('idx_user_id', 'user_id'),
        Index('idx_type', 'type'),
        Index('idx_symbol', 'symbol'),
        Index('idx_create_time', 'create_time'),
        {'mysql_charset': 'utf8mb4', 'mysql_collate': 'utf8mb4_unicode_ci'}
    )

class AnalysisHistoryManager:
    """分析历史管理类"""
    
    def __init__(self, session: Session = None):
        self.session = session
    
    def add_analysis_history(self, user_id: int, type: str, symbol: str, 
                             content: str, timeframe: str = None) -> bool:
        """
        添加分析历史记录
        
        Args:
            user_id: 用户ID
            type: 分析类型(crypto, astock)
            symbol: 交易符号
            content: 分析内容
            timeframe: 时间框架（可选）
            
        Returns:
            添加是否成功
        """
        try:
            # 创建新记录
            new_history = AnalysisHistory(
                user_id=user_id,
                type=type,
                symbol=symbol,
                timeframe=timeframe,
                content=content,
                create_time=datetime.now()
            )
            
            # 添加并提交
            self.session.add(new_history)
            self.session.commit()
            
            logger.info(f"成功添加分析历史记录，用户ID: {user_id}, 类型: {type}, 交易符号: {symbol}")
            return True
            
        except Exception as e:
            self.session.rollback()
            logger.error(f"添加分析历史记录失败: {e}")
            return False
    
    def delete_analysis_history(self, history_id: int) -> bool:
        """
        删除分析历史记录
        
        Args:
            history_id: 历史记录ID
            
        Returns:
            删除是否成功
        """
        try:
            # 查询记录
            history = self.session.query(AnalysisHistory).filter(AnalysisHistory.id == history_id).first()
            
            if not history:
                logger.warning(f"分析历史记录ID {history_id} 不存在")
                return False
            
            # 删除记录
            self.session.delete(history)
            self.session.commit()
            
            logger.info(f"成功删除分析历史记录，ID: {history_id}")
            return True
            
        except Exception as e:
            self.session.rollback()
            logger.error(f"删除分析历史记录失败: {e}")
            return False
    
    def get_analysis_history_by_id(self, history_id: int) -> Optional[Dict[str, Any]]:
        """
        根据ID获取分析历史记录
        
        Args:
            history_id: 历史记录ID
            
        Returns:
            分析历史记录，如果不存在则返回None
        """
        try:
            # 查询记录
            history = self.session.query(AnalysisHistory).filter(AnalysisHistory.id == history_id).first()
            
            if history:
                # 转换为字典
                return {
                    'id': history.id,
                    'user_id': history.user_id,
                    'type': history.type,
                    'symbol': history.symbol,
                    'timeframe': history.timeframe,
                    'content': history.content,
                    'create_time': history.create_time
                }
            else:
                return None
                
        except Exception as e:
            logger.error(f"获取分析历史记录失败: {e}")
            return None
    
    def get_user_analysis_history(self, user_id: int, type: str = None, 
                                 symbol: str = None, limit: int = 10, 
                                 offset: int = 0) -> List[Dict[str, Any]]:
        """
        获取用户的分析历史记录
        
        Args:
            user_id: 用户ID
            type: 分析类型筛选（可选）
            symbol: 交易符号筛选（可选）
            limit: 返回记录数量限制
            offset: 分页偏移量
            
        Returns:
            分析历史记录列表
        """
        try:
            # 构建查询
            query = self.session.query(AnalysisHistory).filter(AnalysisHistory.user_id == user_id)
            
            # 添加可选过滤条件
            if type:
                query = query.filter(AnalysisHistory.type == type)
            if symbol:
                query = query.filter(AnalysisHistory.symbol == symbol)
            
            # 按创建时间降序排序，并应用分页
            results = query.order_by(AnalysisHistory.create_time.desc()).limit(limit).offset(offset).all()
            
            # 转换为字典列表
            history_list = []
            for history in results:
                history_list.append({
                    'id': history.id,
                    'user_id': history.user_id,
                    'type': history.type,
                    'symbol': history.symbol,
                    'timeframe': history.timeframe,
                    'content': history.content,
                    'create_time': history.create_time
                })
            
            return history_list
                
        except Exception as e:
            logger.error(f"获取用户分析历史记录失败: {e}")
            return []