#!/usr/bin/env python

"""
command line blogger
"""

import optparse
import os
import subprocess
import sys
import tempfile
import urllib2

from ConfigParser import ConfigParser

# global variable
CONFIG = '.blogme'

def tmpbuffer(editor=None):
    """open an editor and retreive the resulting editted buffer"""
    if not editor:
        editor = os.environ['EDITOR']
    tmpfile = tempfile.mktemp(suffix='.txt')
    cmdline = editor.split()
    cmdline.append(tmpfile)
    edit = subprocess.call(cmdline)
    buffer = file(tmpfile).read().strip()
    os.remove(tmpfile)
    return buffer

def main(args=sys.argv[1:]):

    # parse command line options
    parser = optparse.OptionParser()
    parser.add_option('-c', '--config')
    parser.add_option('-H', '--host')
    parser.add_option('-u', '--user')
    parser.add_option('-p', '--password')
    parser.add_option('--private', action='store_true', default=False)
    parser.add_option('--secret', action='store_true', default=False)
    options, args = parser.parse_args()
    
    # sanity check
    if options.private and options.secret:
        print "post can't be secret and private!"
        sys.exit(1)

    # parse dotfile config
    config = ConfigParser()
    if not options.config:
        home = os.environ['HOME']
        options.config = os.path.join(home, CONFIG)
    if os.path.exists(options.config):
        config.read(options.config)

    # determine user name and password
    fields = [ 'user', 'password' ]
    for field in fields:
        globals()[field] = prefs.get(field)

        optval = getattr(options, field)
        if optval:
            password = None # needed to ensure prompting for pw from command line
            globals()[field] = optval

        if globals()[field] is None:
            globals()[field] = raw_input('%s: ' % field)
    assert user is not None
    assert password is not None

    # write the dotfile if it doesn't exist
#    if not os.path.exists(dotfile):
#        preffile = file(dotfile, 'w')
#        print >> preffile, 'user: %s' % user
#        print >> preffile, 'password: %s' % password
#        preffile.close()
#        os.chmod(dotfile, 0600)
    

    # get the blog
    if args:
        msg = ' '.join(args)
    else:
        msg = tmpbuffer()

    # open the url
    url = options.host
    url += '?auth=digest' # specify authentication method
    if options.private:
        url += '&privacy=private'
    if options.secret:
        url += '&privacy=secret'
    authhandler = urllib2.HTTPDigestAuthHandler()
    authhandler.add_password('bitsyblog', url, user, password)
    opener = urllib2.build_opener(authhandler)
    urllib2.install_opener(opener)
    try:
        url = urllib2.urlopen(url, data=msg)
        print url.url # print the blog post's url
    except urllib2.HTTPError, e:
        print e

if __name__ == '__main__':
    main()