# _*_ coding:utf-8 _*_

import urllib

import urllib2

import re

class Tool:

    removingImg = re.compile('<img.*?>| {7}|')

    removingAddr = re.compile('<a.*?>|</a>')

    replaceLine = re.compile('<tr>|<div>|</div>|</p>')

    replaceTD = re.compile('<td>')

    replacePara = re.compile('<p.*?>')

    replaceBR = re.compile('<br><br>|<br>')

    removeExtraTag = re.compile('<.*?>')

    def replace(self,x):

        x = re.sub(self.removingImg,"",x)

        x = re.sub(self.removingAddr,"",x)

        x = re.sub(self.replaceLine,"\n",x)

        x = re.sub(self.replaceTD,"\t",x)

        x = re.sub(self.replacePara,"\n",x)

        x = re.sub(self.replaceBR,"\n",x)

        x = re.sub(self.removeExtraTag,"",x)

        return x.strip()

class BDTB:

    def __init__(self,baseUrl,seeLZ,floorTag):

        self.baseURL = baseUrl

        self.seeLZ = '?see_lz='+str(seeLZ)

        self.tool = Tool()

        self.file = None

        self.floor = 1

        self.defaultTitle = '百度贴吧'

        self.floorTag = floorTag

    def getPage(self,pageNum):

        try:

            url = self.baseURL + self.seeLZ + '&pn=' + str(pageNum)

            request = urllib2.Request(url)

            response = urllib2.urlopen(request)

            pageCode = response.read().decode('utf-8')

            #print pageCode

            return pageCode

        except urllib2.URLError,e:

            if hasattr(e,"reason"):

                print u"连接百度贴吧失败，错误原因",e.reason

                return None

    def getTitle(self,page):

         pattern = re.compile('<h3 class="core_title_txt.*?>(.*?)</h3>',re.S)

         result = re.search(pattern,page)

         if result:

             #print result.group(1)

             return result.group(1).strip()

         else:

             #print "Not match"

             return None

    def getPageNum(self,page):

         pattern = re.compile('<li class="l_reply_num.*?</span>.*?<span.*?>(.*?)</span>',re.S)

         result = re.search(pattern,page)

         if result:

             #print result.group(1)

             return result.group(1).strip()

         else:

             #print "Not match"

             return None

    def getContent(self,page):

        pattern = re.compile('<div id="post_content_.*?>(.*?)</div>',re.S)

        items = re.findall(pattern,page)

        contents = []

        for item in items:

            #print floor,u"楼-----------------------------------------\n"

            content = "\n" + self.tool.replace(item) + "\n"

            contents.append(content.encode('utf-8'))

            #floor += 1

        return contents

    def setFileTitle(self,title):

        if title is not None:

            self.file = open(title + ".txt","w+")

        else:

            self.file = open(self.defaultTitle + ".txt","w+")

    def writeData(self,contents):

        for item in contents:

            if self.floorTag == '':

                floorLine = "\n" + str(self.floor) + u"------------------------------------------------------\n"

                self.file.write(floorLine)

            self.file.write(item);

            self.floor += 1

    def start(self):

        indexPage = self.getPage(1)

        pageNum = self.getPageNum(indexPage)

        title = self.getTitle(indexPage)

        self.setFileTitle(title)

        if pageNum == None:

            print "URL已失效，请重试"

            return

        try:

            print "该帖子共有" + str(pageNum) + "页"

            for i in range(1,int(pageNum)+1):

                print "正在写入第" + str(i) + "页数据"

                page = self.getPage(i)

                contents = self.getContent(page)

                self.writeData(contents)

        except IOError,e:

            print "写入异常，原因" + e.message

        finally:

            print "写入任务完成"

print u"请输入帖子代号"

baseURL = "http://tieba.baidu.com/p/" + str(raw_input(u'http://tieba.baidu.com/p/'))

seeLZ = raw_input("是否只获取楼主发言，是输入1，否输入0\n")

floorTag = raw_input("是否写入楼层信息，是输入1，否输入0\n")

bdtb = BDTB(baseURL,seeLZ,floorTag)

bdtb.start()

#baseURL = 'http://tieba.baidu.com/p/3138733512'

#bdtb = BDTB(baseURL,1)

#page = bdtb.getPage(1)

#bdtb.getTitle()

#bdtb.getPageNum()

#bdtb.getContent(page)