import re

from urllib import quote

from twill import commands as twc

# convenience / consistency renaming

has_text = twc.find

hasnt_text = twc.notfind

# specific commands

_LINK = re.compile('<a.*?href="(.*?)".*?>(.*?)</a>', re.I | re.S)

def has_link(text, url=''):

    browser = twc.get_browser()

    html = browser.get_html()

    if html:

        for match in _LINK.finditer(html):

            linkurl = match.group(1)

            linktext = match.group(2)

            if linktext == text:

                # if url is specified linkurl must match

                if url and linkurl != url:

                    continue

    raise AssertionError('link %s (%s) not found' % (text, url))

def view(rql, vid=''):

    """

    >> view 'Project P'

    apply <vid> to <rql>'s rset

    """

    if vid:

        twc.go('view?rql=%s&vid=%s' % (quote(rql), vid))

    else:

        twc.go('view?rql=%s' % quote(rql))

def create(etype):

    """

    >> create Project

    go to <etype>'s creation page

    """

    twc.go('view?etype=%s&vid=creation' % etype)

def edit(rql):

    """

    >> edit "Project P WHERE P eid 123"

    calls edition view for <rql>

    """

    twc.go('view?rql=%s&vid=edition' % quote(rql))

def setvalue(formname, fieldname, value):

    """

    >> setvalue entityForm name pylint

    sets the field's value in the form

    <forname> should either be the form's index, the form's name

    or the form's id

    """

    browser = twc.get_browser()

    form = browser.get_form(formname)

    if form is None:

        # try to find if one of the forms has <formname> as id

        for index, form in enumerate(browser._browser.forms()):

            # forms in cubicweb don't always have a name

            if form.attrs.get('id') == formname:

                # browser.get_form_field knows how to deal with form index

                formname = str(index+1)

                break

        else:

            raise ValueError('could not find form named <%s>' % formname)

    eid = browser.get_form_field(form, 'eid').value

    twc.formvalue(formname, '%s:%s' % (fieldname, eid), value)

def submitform(formname, submit_button=None):

    """

    >> submitform entityForm

    Submit the form named entityForm. This is useful when the form is pre-filed

    and we only want to click on submit.

    (The original submit command chooses the form to submit according to the last

    formvalue instruction)

    """

    browser = twc.get_browser()

    form = browser.get_form(formname)

    if form is None:

        # try to find if one of the forms has <formname> as id

        for form in browser._browser.forms():

            # forms in cubicweb don't always have a name

            if form.attrs.get('id') == formname:

                break

        else:

            raise ValueError('could not find form named <%s>' % formname)

    browser._browser.form = form

    browser.submit(submit_button)

# missing actions: delete, copy, changeview