# encoding=utf-8
__author__ = 'Jonny'
__location__ = '西安'
__date__ = '2018-05-14'
'''
需要的基本開發庫文件：
requests,pymongo,pyquery,selenium
開發流程：
  搜索關鍵字：利用selenium驅動瀏覽器搜索關鍵字，得到查詢后的商品列表
  分析頁碼并翻頁：得到商品頁碼數，模擬翻頁，得到后續頁面的商品列表
  分析提取商品內容：利用PyQuery分析頁面源代碼，解析獲得商品列表信息
  存儲到MongDB中：將商品的信息列表存儲到數據庫MongoDB。
'''
import requests
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException
from pyquery import PyQuery as pq
import pymongo
import re
import time
browser = webdriver.Chrome()
wait = WebDriverWait(browser,10)
client = pymongo.MongoClient('localhost',27017)
mongo = client['taobao']
def searcher():
  url = 'https://www.taobao.com/'
  browser.get(url=url)
  try:
    #判斷頁面加載是夠成功，設置等待時間
    #判斷位置1：搜索輸入框是否加載完成
    input_kw = wait.until(
      EC.presence_of_element_located((By.CSS_SELECTOR, '#q'))
    )
    #判斷位置2：搜索輸入框對應的搜索按鍵是否加載完成
    submit = wait.until(EC.element_to_be_clickable(
      (By.CSS_SELECTOR,'#J_TSearchForm > div.search-button > button'))
    )
    input_kw.send_keys('男裝')
    submit.click()
    #等待頁面加載完成，便于準確判斷網頁的總頁數
    page_counts = wait.until(
      EC.presence_of_element_located(
        (By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > div.total'))
    )
    parse_page()
    return page_counts.text
  except TimeoutException as e:
    print(e.args)
    return searcher()
#實現翻頁
def next_page(page_number):
  try:
    # 判斷頁面加載是夠成功，設置等待時間
    # 判斷位置1：頁面跳轉輸入頁是否加載完成
    input_page = wait.until(
      EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.form > input'))
    )
    # 判斷位置2：確認按鍵是否加載完成
    submit = wait.until(EC.element_to_be_clickable(
      (By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit'))
    )
    input_page.send_keys(page_number)
    submit.click()
    #判斷翻頁是否成功
    wait.until(EC.text_to_be_present_in_element(
      (By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > ul > li.item.active'),str(page_number))
    )
    parse_page()
  except TimeoutException as e:
    print(e.args)
    next_page(page_number)
#對頁面進行數據處理
def parse_page():
  # wait.until(EC.presence_of_element_located(By.CSS_SELECTOR,'#mainsrp-itemlist > div > div'))
  wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-itemlist .items .item')))
  html = browser.page_source
  doc = pq(html)
  items = doc('#mainsrp-itemlist .items .item').items()
  for item in items:
    goods = {
      'image':item.find('.pic .img').attr('src'),
      'price':item.find('.price').text(),
      'deal':item.find('.deal-cnt').text()[:-3],
      'title':item.find('.title').text(),
      'shop':item.find('.shop').text(),
      'location':item.find('.location').text()
    }
    print(goods)
    data_storage(goods)
#將數據存入數據庫
def data_storage(goods):
  try:
    if mongo['mongo_sheet'].insert(goods):
      print('Successfully storage!')
  except Exception as e:
    print('failedly storage!',goods)
def main():
  text = searcher()
  print(text)
  #獲取總頁數
  pages = int(re.compile('(\d+)').search(text).group(0))
  print(pages)
  for i in range(2,pages+1):
    next_page(i)
  browser.close()
if __name__ == '__main__':
  main()