# -*- coding: utf-8 -*-

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

Helper functions

Consists of functions to typically be used within templates, but also

available to Controllers. This module is available to both as 'h'.

"""

import hashlib

import StringIO

import logging

import re

import urlparse

import textwrap

from beaker.cache import cache_region

from pygments.formatters.html import HtmlFormatter

from pygments import highlight as code_highlight

from pylons.i18n.translation import _

from webhelpers.html import literal, HTML, escape

from webhelpers.html.tags import checkbox, end_form, hidden, link_to, \

    select, submit, text, password, textarea, radio, form as insecure_form

from webhelpers.number import format_byte_size

from webhelpers.pylonslib import Flash as _Flash

from webhelpers.pylonslib.secure_form import secure_form, authentication_token

from webhelpers.text import chop_at, truncate, wrap_paragraphs

from webhelpers.html.tags import _set_input_attrs, _set_id_attr, \

    convert_boolean_attrs, NotGiven, _make_safe_id_component

from kallithea.config.routing import url

from kallithea.lib.annotate import annotate_highlight

from kallithea.lib.pygmentsutils import get_custom_lexer

from kallithea.lib.utils2 import str2bool, safe_unicode, safe_str, \

    time_to_datetime, AttributeDict, safe_int, MENTIONS_REGEX

from kallithea.lib.markup_renderer import url_re

from kallithea.lib.vcs.exceptions import ChangesetDoesNotExistError

from kallithea.lib.vcs.backends.base import BaseChangeset, EmptyChangeset

log = logging.getLogger(__name__)

def canonical_url(*args, **kargs):

    '''Like url(x, qualified=True), but returns url that not only is qualified

    but also canonical, as configured in canonical_url'''

    from kallithea import CONFIG

    try:

        parts = CONFIG.get('canonical_url', '').split('://', 1)

        kargs['host'] = parts[1].split('/', 1)[0]

        kargs['protocol'] = parts[0]

    except IndexError:

        kargs['qualified'] = True

    return url(*args, **kargs)

def canonical_hostname():

    '''Return canonical hostname of system'''

    from kallithea import CONFIG

    try:

        parts = CONFIG.get('canonical_url', '').split('://', 1)

        return parts[1].split('/', 1)[0]

    except IndexError:

        parts = url('home', qualified=True).split('://', 1)

        return parts[1].split('/', 1)[0]

def html_escape(s):

    """Return string with all html escaped.

    This is also safe for javascript in html but not necessarily correct.

    """

    return (s

        .replace('&', '&')

        .replace(">", ">")

        .replace("<", "&lt;")

        .replace('"', """)

        .replace("'", "'")

        )

def shorter(s, size=20, firstline=False, postfix='...'):

    """Truncate s to size, including the postfix string if truncating.

    If firstline, truncate at newline.

    """

    if firstline:

        s = s.split('\n', 1)[0].rstrip()

    if len(s) > size:

        return s[:size - len(postfix)] + postfix

    return s

def _reset(name, value=None, id=NotGiven, type="reset", **attrs):

    """

    Reset button

    """

    _set_input_attrs(attrs, type, name, value)

    _set_id_attr(attrs, id, name)

    convert_boolean_attrs(attrs, ["disabled"])

    return HTML.input(**attrs)

reset = _reset

safeid = _make_safe_id_component

def FID(raw_id, path):

    """

    Creates a unique ID for filenode based on it's hash of path and revision

    it's safe to use in urls

    :param raw_id:

    :param path:

    """

    return 'C-%s-%s' % (short_id(raw_id), hashlib.md5(safe_str(path)).hexdigest()[:12])

class _FilesBreadCrumbs(object):

    def __call__(self, repo_name, rev, paths):

        if isinstance(paths, str):

            paths = safe_unicode(paths)

        url_l = [link_to(repo_name, url('files_home',

                                        repo_name=repo_name,

                                        revision=rev, f_path=''),

                         class_='ypjax-link')]

        paths_l = paths.split('/')

        for cnt, p in enumerate(paths_l):

            if p != '':

                url_l.append(link_to(p,

                                     url('files_home',

                                         repo_name=repo_name,

                                         revision=rev,

                                         f_path='/'.join(paths_l[:cnt + 1])

                                         ),

                                     class_='ypjax-link'

                                     )

                             )

        return literal('/'.join(url_l))

files_breadcrumbs = _FilesBreadCrumbs()

class CodeHtmlFormatter(HtmlFormatter):

    """

    My code Html Formatter for source codes

    """

    def wrap(self, source, outfile):

        return self._wrap_div(self._wrap_pre(self._wrap_code(source)))

    def _wrap_code(self, source):

        for cnt, it in enumerate(source):

            i, t = it

            yield i, t

    def _wrap_tablelinenos(self, inner):

        dummyoutfile = StringIO.StringIO()

        lncount = 0

        for t, line in inner:

            if t:

                lncount += 1

            dummyoutfile.write(line)

        fl = self.linenostart

        mw = len(str(lncount + fl - 1))

        sp = self.linenospecial

        st = self.linenostep

        la = self.lineanchors

        aln = self.anchorlinenos

        nocls = self.noclasses

        if sp:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if i % sp == 0:

                        if aln:

                            lines.append('<a href="#%s%d" class="special">%*d</a>' %

                                         (la, i, mw, i))

                        else:

                            lines.append('<span class="special">%*d</span>' % (mw, i))

                    else:

                        if aln:

                            lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                        else:

                            lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        else:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if aln:

                        lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                    else:

                        lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        # in case you wonder about the seemingly redundant <div> here: since the

        # content in the other cell also is wrapped in a div, some browsers in

        # some configurations seem to mess up the formatting...

        if nocls:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td><div class="linenodiv" '

                      'style="background-color: #f0f0f0; padding-right: 10px">'

                      '<pre style="line-height: 125%">' +

                      ls + '</pre></div></td><td id="hlcode" class="code">')

        else:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td class="linenos"><div class="linenodiv"><pre>' +

                      ls + '</pre></div></td><td id="hlcode" class="code">')

        yield 0, dummyoutfile.getvalue()

        yield 0, '</td></tr></table>'

_whitespace_re = re.compile(r'(\t)|( )(?=\n|</div>)')

def _markup_whitespace(m):

    groups = m.groups()

    if groups[0]:

        return '<u>\t</u>'

    if groups[1]:

        return ' <i></i>'

def markup_whitespace(s):

    return _whitespace_re.sub(_markup_whitespace, s)

def pygmentize(filenode, **kwargs):

    """

    pygmentize function using pygments

    :param filenode:

    """

    lexer = get_custom_lexer(filenode.extension) or filenode.lexer

    return literal(markup_whitespace(

        code_highlight(filenode.content, lexer, CodeHtmlFormatter(**kwargs))))

def pygmentize_annotation(repo_name, filenode, **kwargs):

    """

    pygmentize function for annotation

    :param filenode:

    """

    color_dict = {}

    def gen_color(n=10000):

        """generator for getting n of evenly distributed colors using

        hsv color and golden ratio. It always return same order of colors

        :returns: RGB tuple

        """

        def hsv_to_rgb(h, s, v):

            if s == 0.0:

                return v, v, v

            i = int(h * 6.0)  # XXX assume int() truncates!

            f = (h * 6.0) - i

            p = v * (1.0 - s)

            q = v * (1.0 - s * f)

            t = v * (1.0 - s * (1.0 - f))

            i = i % 6

            if i == 0:

                return v, t, p

            if i == 1:

                return q, v, p

            if i == 2:

                return p, v, t

            if i == 3:

                return p, q, v

            if i == 4:

                return t, p, v

            if i == 5:

                return v, p, q

        golden_ratio = 0.618033988749895

        h = 0.22717784590367374

        for _unused in xrange(n):

            h += golden_ratio

            h %= 1

            HSV_tuple = [h, 0.95, 0.95]

            RGB_tuple = hsv_to_rgb(*HSV_tuple)

            yield map(lambda x: str(int(x * 256)), RGB_tuple)

    cgenerator = gen_color()

    def get_color_string(cs):

        if cs in color_dict:

            col = color_dict[cs]

        else:

            col = color_dict[cs] = cgenerator.next()

        return "color: rgb(%s)! important;" % (', '.join(col))

    def url_func(repo_name):

        def _url_func(changeset):

            author = escape(changeset.author)

            date = changeset.date

            message = escape(changeset.message)

            tooltip_html = ("<div style='font-size:0.8em'><b>Author:</b>"

                            " %s<br/><b>Date:</b> %s</b><br/><b>Message:"

                            "</b> %s<br/></div>") % (author, date, message)

            lnk_format = show_id(changeset)

            uri = link_to(

                    lnk_format,

                    url('changeset_home', repo_name=repo_name,

                        revision=changeset.raw_id),

                    style=get_color_string(changeset.raw_id),

                    class_='safe-html-title',

                    title=tooltip_html,

                    **{'data-toggle': 'tooltip'}

                  )

            uri += '\n'

            return uri

        return _url_func

    return literal(markup_whitespace(annotate_highlight(filenode, url_func(repo_name), **kwargs)))

class _Message(object):

    """A message returned by ``Flash.pop_messages()``.

    Converting the message to a string returns the message text. Instances

    also have the following attributes:

    * ``message``: the message text.

    * ``category``: the category specified when the message was created.

    """

    def __init__(self, category, message):

        self.category = category

        self.message = message

    def __str__(self):

        return self.message

    __unicode__ = __str__