import json
import sys
import urllib2
from lxml import etree
import httplib
httplib.HTTPConnection._http_vsn = 10
httplib.HTTPConnection._http_vsn_str = 'HTTP/1.0'

response = urllib2.urlopen('http://www.beyondliteracy.com/wp-json/wp/v2/posts')
posts = json.loads(response.read())
for post in posts:
  print(' - Post ID: {0}, Title: {1}, Url: {2}'
    .format(post['id'], post['title']['rendered'], post['link']))


def update_post(api_base, post_id, post_content):
    # more than just the content field can be updated. see the api docs here:
    # https://developer.wordpress.org/rest-api/reference/posts/#update-a-post
    data = json.dumps({
        'content': post_content
    })

    url = api_base + 'wp/v2/posts/{post_id}/?id={post_id}abc'.format(post_id=post_id)
    req = urllib2.Request(url, data, {'Content-Type': 'application/json'})
    response = urllib2.urlopen(req).read()

    print('* Post updated. Check it out at {0}'.format(json.loads(response)['link']))


def print_usage():
    print('Usage: {0} <url> (optional: <post_id> <file with post_content>)'.format(__file__))


if __name__ == '__main__':

    # ensure we have at least a url
    if len(sys.argv) < 2:
        print_usage()
        sys.exit(1)

    # if we have a post id, we need content too
    if 2 < len(sys.argv) < 4:
        print('Please provide a file with post content with a post id')
        print_usage()
        sys.exit(1)

    print('* Discovering API Endpoint')
    api_url = sys.argv[1]
    print('* API lives at: {0}'.format(api_url))

    # if we only have a url, show the posts we have have
    if len(sys.argv) < 3:
        print('* Getting available posts')

        sys.exit(0)

    # if we get here, we have what we need to update a post!
    print('* Updating post {0}'.format(sys.argv[2]))
    with open(sys.argv[3], 'r') as content:
        new_content = content.readlines()

    update_post(api_url, sys.argv[2], ''.join(new_content))

    print('* Update complete!')