from flask import Flask, session, render_template, redirect, Blueprint, request, jsonify, abort
from utils.mynlp import SnowNLP
from utils.getHomePageData import *
from utils.getHotWordPageData import *
from utils.getTableData import *
from utils.getPublicData import getAllHotWords, getAllTopics, getArticleByType, getArticleById
from utils.getEchartsData import *
from utils.getTopicPageData import *
from utils.yuqingpredict import *
from utils.logger import app_logger as logging
from utils.cache_manager import prediction_cache
from utils.ai_analyzer import ai_analyzer
from utils.ai_analysis import AIAnalysis
from sqlalchemy.orm import Session
from sqlalchemy import create_engine
import asyncio
import torch
from BCAT_front.predict import model_manager
from functools import wraps
import bleach
import re
from datetime import datetime, timedelta

pb = Blueprint('page',
               __name__,
               url_prefix='/page',
               template_folder='templates')

def sanitize_input(text):
    """清理用户输入，防止XSS攻击"""
    if text is None:
        return None
    return bleach.clean(str(text), strip=True)

def validate_csrf_token():
    """验证CSRF令牌"""
    token = request.form.get('csrf_token')
    stored_token = session.get('csrf_token')
    if not token or not stored_token or token != stored_token:
        return False
    return True

def login_required(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if 'username' not in session:
            return redirect('/user/login')
        return f(*args, **kwargs)
    return decorated_function

def api_login_required(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if 'username' not in session:
            return jsonify({'error': 'Unauthorized'}), 401
        return f(*args, **kwargs)
    return decorated_function

def rate_limit(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        key = f"rate_limit:{request.remote_addr}:{f.__name__}"
        current = int(redis_client.get(key) or 0)
        if current >= 100:  # 每分钟100次请求限制
            return jsonify({'error': 'Too many requests'}), 429
        pipe = redis_client.pipeline()
        pipe.incr(key)
        pipe.expire(key, 60)  # 60秒后重置
        pipe.execute()
        return f(*args, **kwargs)
    return decorated_function

# 设置设备
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

# 设置模型路径
model_save_path = 'model_pro/final_model.pt'
bert_model_path = 'model_pro/bert_model'
ctm_tokenizer_path = 'model_pro/sentence_bert_model'

# 初始化模型
try:
    model_manager.load_models(model_save_path, bert_model_path, ctm_tokenizer_path)
except Exception as e:
    logging.error(f"模型加载失败: {e}")

# 数据库配置
DATABASE_URL = os.getenv('DATABASE_URL', "sqlite:///ai_analysis.db")
engine = create_engine(DATABASE_URL)
AIAnalysis.metadata.create_all(engine)

def predict_sentiment(text):
    """使用改进版模型预测单个文本的情感"""
    try:
        if not text or len(text.strip()) == 0:
            return None, None
        
        # 清理输入
        cleaned_text = sanitize_input(text)
        if not cleaned_text:
            return None, None
            
        predictions, probabilities = model_manager.predict_batch([cleaned_text])
        if predictions is not None and len(predictions) > 0:
            return predictions[0], probabilities[0][predictions[0]]
        return None, None
    except Exception as e:
        logging.error(f"预测过程中出现错误: {e}")
        return None, None

@pb.route('/home')
@login_required
def home():
    try:
        username = session.get('username')
        articleLenMax, likeCountMaxAuthorName, cityMax = getHomeTagsData()
        commentsLikeCountTopFore = getHomeCommentsLikeCountTopFore()
        X, Y = getHomeArticleCreatedAtChart()
        typeChart = getHomeTypeChart()
        createAtChart = getHomeCommentCreatedChart()
        
        return render_template('index.html',
                             username=username,
                             articleLenMax=articleLenMax,
                             likeCountMaxAuthorName=likeCountMaxAuthorName,
                             cityMax=cityMax,
                             commentsLikeCountTopFore=commentsLikeCountTopFore,
                             xData=X,
                             yData=Y,
                             typeChart=typeChart,
                             createAtChart=createAtChart)
    except Exception as e:
        logging.error(f"加载首页时发生错误: {e}")
        return render_template('error.html', error_message="加载首页失败")

@pb.route('/hotWord')
@login_required
def hotWord():
    try:
        username = session.get('username')
        hotWordList = getAllHotWords()
        if not hotWordList:
            return render_template('error.html', error_message="无法获取热词列表")
            
        defaultHotWord = sanitize_input(request.args.get('hotWord', hotWordList[0][0]))
        
        # 验证热词是否在列表中
        if not any(defaultHotWord in word for word in hotWordList):
            return abort(400, "无效的热词")
            
        hotWordLen = getHotWordLen(defaultHotWord)
        X, Y = getHotWordPageCreatedAtCharData(defaultHotWord)
        
        value = SnowNLP(defaultHotWord).sentiments
        if value == 0.5:
            sentences = '中性'
        elif value > 0.5:
            sentences = '正面'
        elif value < 0.5:
            sentences = '负面'
            
        comments = getCommentFilterData(defaultHotWord)
        
        return render_template('hotWord.html',
                             username=username,
                             hotWordList=hotWordList,
                             defaultHotWord=defaultHotWord,
                             hotWordLen=hotWordLen,
                             sentences=sentences,
                             xData=X,
                             yData=Y,
                             comments=comments)
    except Exception as e:
        logging.error(f"加载热词页面时发生错误: {e}")
        return render_template('error.html', error_message="加载热词页面失败")

@pb.route('/hotTopic')
def hotTopic():
    username = session.get('username')
    topicList = getAllTopics()
    defaultTopic = topicList[0][0]
    if request.args.get('topic'):
        defaultTopic = request.args.get('topic')
    topicLen = getTopicLen(defaultTopic)
    X, Y = getTopicPageCreatedAtCharData()
    sentences = ''
    
    # ... 这里要嵌入 topic 相关内容（热度？）来填充 sentences
    
    comments = getCommentFilterDataTopic(defaultTopic)
    return render_template('hotWord.html',
                           username=username,
                           topicList=topicList,
                           defaultTopic=defaultTopic,
                           topicLen=topicLen,
                           sentences=sentences,
                           xData=X,
                           yData=Y,
                           comments=comments)

@pb.route('/tableData')
@login_required
def tableData():
    try:
        username = session.get('username')
        defaultFlag = bool(request.args.get('flag', False))
        tableData = getTableDataList(defaultFlag)
        
        return render_template('tableData.html',
                             username=username,
                             tableData=tableData,
                             defaultFlag=defaultFlag)
    except Exception as e:
        logging.error(f"加载表格数据时发生错误: {e}")
        return render_template('error.html', error_message="加载表格数据失败")

@pb.route('/articleChar')
def articleChar():
    username = session.get('username')
    typeList = getTypeList()
    defaultType = typeList[0]
    if request.args.get('type'): defaultType = request.args.get('type')
    X, Y = getArticleLikeCount(defaultType)
    x1Data, y1Data = getArticleCommentsLen(defaultType)
    x2Data, y2Data = getArticleRepotsLen(defaultType)
    return render_template('articleChar.html',
                           username=username,
                           typeList=typeList,
                           defaultType=defaultType,
                           xData=X,
                           yData=Y,
                           x1Data=x1Data,
                           y1Data=y1Data,
                           x2Data=x2Data,
                           y2Data=y2Data)

@pb.route('/ipChar')
@login_required
def ipChar():
    try:
        username = session.get('username')
        articleRegionData = getIPByArticleRegion()
        commentRegionData = getIPByCommentsRegion()
        
        return render_template('ipChar.html',
                             username=username,
                             articleRegionData=articleRegionData,
                             commentRegionData=commentRegionData)
    except Exception as e:
        logging.error(f"加载IP统计时发生错误: {e}")
        return render_template('error.html', error_message="加载IP统计失败")

@pb.route('/commentChar')
@login_required
def commentChar():
    try:
        username = session.get('username')
        X, Y = getCommentDataOne()
        genderPieData = getCommentDataTwo()
        
        return render_template('commentChar.html',
                             username=username,
                             xData=X,
                             yData=Y,
                             genderPieData=genderPieData)
    except Exception as e:
        logging.error(f"加载评论统计时发生错误: {e}")
        return render_template('error.html', error_message="加载评论统计失败")

@pb.route('/yuqingChar')
@login_required
def yuqingChar():
    try:
        username = session.get('username')
        model_type = sanitize_input(request.args.get('model', 'pro'))
        
        # 验证模型类型
        if model_type not in ['pro', 'basic']:
            return abort(400, "无效的模型类型")
        
        X, Y, biedata = getYuQingCharDataOne()
        biedata1, biedata2 = getYuQingCharDataTwo(model_type)
        x1Data, y1Data = getYuQingCharDataThree()
        
        return render_template('yuqingChar.html',
                             username=username,
                             xData=X,
                             yData=Y,
                             biedata=biedata,
                             biedata1=biedata1,
                             biedata2=biedata2,
                             x1Data=x1Data,
                             y1Data=y1Data,
                             model_type=model_type)
    except Exception as e:
        logging.error(f"加载舆情统计时发生错误: {e}")
        return render_template('error.html', error_message="加载舆情统计失败")

@pb.route('/yuqingpredict')
@login_required
def yuqingpredict():
    try:
        username = session.get('username')
        TopicList = getAllTopicData()
        if not TopicList:
            return render_template('error.html', error_message="无法获取话题列表")
            
        defaultTopic = sanitize_input(request.args.get('Topic', TopicList[0][0]))
        
        # 验证话题是否在列表中
        if not any(defaultTopic in topic for topic in TopicList):
            return abort(400, "无效的话题")
            
        TopicLen = getTopicLen(defaultTopic)
        X, Y = getTopicCreatedAtandpredictData(defaultTopic)
        
        model_type = sanitize_input(request.args.get('model', 'pro'))
        if model_type not in ['pro', 'basic']:
            return abort(400, "无效的模型类型")
        
        # 尝试从缓存获取预测结果
        cache_key = f"{defaultTopic}_{model_type}"
        cached_result = prediction_cache.get(cache_key)
        
        if cached_result is not None:
            sentences = cached_result
        else:
            if model_type == 'basic':
                value = SnowNLP(defaultTopic).sentiments
                if value == 0.5:
                    sentences = '中性'
                elif value > 0.5:
                    sentences = '正面'
                elif value < 0.5:
                    sentences = '负面'
            else:
                predicted_label, confidence = predict_sentiment(defaultTopic)
                if predicted_label is not None:
                    sentences = '良好' if predicted_label == 0 else '不良'
                    sentences = f"{sentences} (置信度: {confidence:.2%})"
                else:
                    sentences = '预测失败，请稍后重试'
                    logging.error(f"预测失败，话题: {defaultTopic}")
            
            # 将结果存入缓存
            prediction_cache.set(cache_key, sentences)
        
        comments = getCommentFilterDataTopic(defaultTopic)
        
        return render_template('yuqingpredict.html',
                             username=username,
                             TopicList=TopicList,
                             defaultTopic=defaultTopic,
                             TopicLen=TopicLen,
                             sentences=sentences,
                             xData=X,
                             yData=Y,
                             comments=comments,
                             model_type=model_type)
    except Exception as e:
        logging.error(f"加载舆情预测时发生错误: {e}")
        return render_template('error.html', error_message="加载舆情预测失败")

@pb.route('/articleCloud')
@login_required
def articleCloud():
    try:
        username = session.get('username')
        return render_template('articleContentCloud.html', username=username)
    except Exception as e:
        logging.error(f"加载文章云图时发生错误: {e}")
        return render_template('error.html', error_message="加载文章云图失败")

@pb.route('/page/index')
def index():
    """首页路由"""
    try:
        hotWordList = getAllHotWords()
        logging.info("成功获取热词列表")
        return render_template('index.html', hotWordList=hotWordList)
    except Exception as e:
        logging.error(f"渲染首页时发生错误: {e}")
        return render_template('error.html', error_message="加载首页失败")

@pb.route('/page/article/<type>')
def article(type):
    """文章列表页路由"""
    try:
        articleList = getArticleByType(type)
        logging.info(f"成功获取类型为 {type} 的文章列表")
        return render_template('article.html', articleList=articleList)
    except Exception as e:
        logging.error(f"获取文章列表时发生错误: {e}")
        return render_template('error.html', error_message="加载文章列表失败")

@pb.route('/page/articleChar/<id>')
def articleChar(id):
    """文章详情页路由"""
    try:
        article = getArticleById(id)
        if not article:
            logging.warning(f"未找到ID为 {id} 的文章")
            return render_template('error.html', error_message="文章不存在")
        logging.info(f"成功获取ID为 {id} 的文章详情")
        return render_template('articleChar.html', article=article)
    except Exception as e:
        logging.error(f"获取文章详情时发生错误: {e}")
        return render_template('error.html', error_message="加载文章详情失败")

@pb.route('/api/analyze_messages', methods=['POST'])
@api_login_required
@rate_limit
async def analyze_messages():
    try:
        if not validate_csrf_token():
            return jsonify({'error': 'Invalid CSRF token'}), 403
            
        data = request.get_json()
        if not data:
            return jsonify({'error': 'No data provided'}), 400
            
        batch_size = min(int(data.get('batch_size', 50)), 100)  # 限制批量大小
        model_type = sanitize_input(data.get('model_type', 'gpt-3.5-turbo'))
        analysis_depth = sanitize_input(data.get('analysis_depth', 'standard'))
        
        # 验证参数
        if model_type not in ['gpt-3.5-turbo', 'gpt-4']:
            return jsonify({'error': 'Invalid model type'}), 400
            
        if analysis_depth not in ['basic', 'standard', 'deep']:
            return jsonify({'error': 'Invalid analysis depth'}), 400
        
        messages = getRecentMessages(batch_size)
        if not messages:
            return jsonify({
                'success': False,
                'error': '没有找到需要分析的消息'
            }), 404
        
        analysis_results = await ai_analyzer.analyze_messages(
            messages=messages,
            batch_size=batch_size,
            model_type=model_type,
            analysis_depth=analysis_depth
        )
        
        if not analysis_results:
            return jsonify({
                'success': False,
                'error': '分析过程中出现错误'
            }), 500
        
        try:
            with Session(engine) as session:
                for result in analysis_results:
                    analysis = AIAnalysis(
                        message_id=result['message_id'],
                        sentiment=result['sentiment'],
                        sentiment_score=float(result['sentiment_score']),
                        keywords=result['keywords'],
                        key_points=result['key_points'],
                        influence_analysis=result['influence_analysis'],
                        risk_level=result['risk_level']
                    )
                    session.add(analysis)
                session.commit()
        except Exception as e:
            logging.error(f"保存分析结果时出错: {e}")
            return jsonify({
                'success': False,
                'error': '保存分析结果失败'
            }), 500
        
        display_results = [
            ai_analyzer.format_analysis_for_display(result)
            for result in analysis_results
        ]
        
        return jsonify({
            'success': True,
            'data': display_results
        })
        
    except Exception as e:
        logging.error(f"分析消息时发生错误: {e}")
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500

@pb.route('/api/get_analysis/<int:message_id>')
@api_login_required
@rate_limit
def get_message_analysis(message_id):
    """获取特定消息的分析结果"""
    try:
        if not message_id or message_id < 1:
            return jsonify({'error': 'Invalid message ID'}), 400
            
        with Session(engine) as session:
            analysis = session.query(AIAnalysis)\
                .filter(AIAnalysis.message_id == message_id)\
                .order_by(AIAnalysis.created_at.desc())\
                .first()
            
            if analysis:
                return jsonify({
                    'success': True,
                    'data': analysis.to_dict()
                })
            else:
                return jsonify({
                    'success': False,
                    'error': '未找到分析结果'
                }), 404
    
    except Exception as e:
        logging.error(f"获取分析结果时出错: {e}")
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500

def getRecentMessages(limit=50):
    """获取最近的消息"""
    # 这里需要根据你的数据库结构实现具体的查询逻辑
    messages = []
    try:
        # 示例查询逻辑
        with Session(engine) as session:
            results = session.execute(
                """
                SELECT id, content 
                FROM comments 
                ORDER BY created_at DESC 
                LIMIT :limit
                """,
                {'limit': limit}
            ).fetchall()
            
            messages = [
                {'id': row[0], 'content': row[1]}
                for row in results
            ]
    except Exception as e:
        logging.error(f"获取最近消息时出错: {e}")
    
    return messages