# -*- coding: utf-8 -*-
import scrapy
from scrapy.loader import ItemLoader
from scrapy.loader.processors import Join, MapCompose, TakeFirst
from w3lib.html import remove_tags

from CinemScraper.items import video

class GrabvideodataSpider(scrapy.Spider):
    name = 'grabVideoData'
    allowed_domains = ['cinematheque.fr']
    start_urls = ['http://www.cinematheque.fr/decouvrir.html']

    item_fields = {
        'title'             : '//h1/text()',
        'secondary_title'   : '//h1/span[@class="sub"]/text()',
        'date_event'        : '//p[@class="date"]/text()',
        'urlVideo'          : '//iframe/@src',
        'description'       : '//div[@class="description"]/p',
        'biographies'       : '//div[@class="biographies"]',
        'tags'              : '//span[contains(@class, "tag")]/text()'
        }

    content_xpath = '//div[@id="content"]'

    def parse(self, response):
        for lien in response.xpath('//a/@href[contains(.,"video")]/../..'):
            url = response.urljoin(lien.css('a::attr(href)').extract_first())
            yield scrapy.Request(url, callback = self.parse_dir_content)

    def parse_dir_content(self, response):
        hxs = scrapy.Selector(response)

        for page in hxs.xpath(self.content_xpath):
            loader = ItemLoader(item=video(), selector=page)
            # mettre des processeurs d'entrée ici
#            loader.default_input_processor = MapCompose(remove_tags)
            loader.default_output_processor = Join()

            # iteration des champs de l'item video
            for field, xpath in self.item_fields.items():
                loader.add_xpath(field, xpath)
            loader.add_value('urlCF', response.url)
            yield loader.load_item()