#!/usr/bin/env python
# coding: utf-8
"""html2text: Turn HTML into equivalent Markdown-structured text."""
from __future__ import division
from html2text import config


__version__ = "2014.9.25"


# TODO:
#   Support decoded entities with UNIFIABLE.

try:
    import htmlentitydefs
    import urlparse
    import HTMLParser
except ImportError:  # Python3
    import html.entities as htmlentitydefs
    import urllib.parse as urlparse
    import html.parser as HTMLParser
try:  # Python3
    import urllib.request as urllib
except ImportError:
    import urllib
import optparse
import re
import sys

try:
    from textwrap import wrap
except ImportError:
    pass


def name2cp(k):
    if k == 'apos':
        return ord("'")
    return htmlentitydefs.name2codepoint[k]

unifiable_n = {}

for k in config.UNIFIABLE.keys():
    unifiable_n[name2cp(k)] = config.UNIFIABLE[k]


def hn(tag):
    if tag[0] == 'h' and len(tag) == 2:
        try:
            n = int(tag[1])
            if n in range(1, 10):
                return n
        except ValueError:
            return 0


def dumb_property_dict(style):
    """
    :returns: A hash of css attributes
    """
    out = dict([(x.strip(), y.strip()) for x, y in
               [z.split(':', 1) for z in
               style.split(';') if ':' in z]])
    return out


def dumb_css_parser(data):
    """
    :type data: str

    :returns: A hash of css selectors, each of which contains a hash of
    css attributes.
    :rtype: dict
    """
    # remove @import sentences
    data += ';'
    importIndex = data.find('@import')
    while importIndex != -1:
        data = data[0:importIndex] + data[data.find(';', importIndex) + 1:]
        importIndex = data.find('@import')

    # parse the css. reverted from dictionary comprehension in order to
    # support older pythons
    elements = [x.split('{') for x in data.split('}') if '{' in x.strip()]
    try:
        elements = dict([(a.strip(), dumb_property_dict(b))
                        for a, b in elements])
    except ValueError:
        elements = {}  # not that important

    return elements


def element_style(attrs, style_def, parent_style):
    """
    :type attrs: dict
    :type style_def: dict
    :type style_def: dict

    :returns: A hash of the 'final' style attributes of the element
    :rtype: dict
    """
    style = parent_style.copy()
    if 'class' in attrs:
        for css_class in attrs['class'].split():
            css_style = style_def['.' + css_class]
            style.update(css_style)
    if 'style' in attrs:
        immediate_style = dumb_property_dict(attrs['style'])
        style.update(immediate_style)
    return style


def google_list_style(style):
    """
    Finds out whether this is an ordered or unordered list

    :type style: dict

    :rtype: str
    """
    if 'list-style-type' in style:
        list_style = style['list-style-type']
        if list_style in ['disc', 'circle', 'square', 'none']:
            return 'ul'
    return 'ol'


def google_has_height(style):
    """
    Check if the style of the element has the 'height' attribute
    explicitly defined

    :type style: dict

    :rtype: bool
    """
    if 'height' in style:
        return True
    return False


def google_text_emphasis(style):
    """
    :type style: dict

    :returns: A list of all emphasis modifiers of the element
    :rtype: list
    """
    emphasis = []
    if 'text-decoration' in style:
        emphasis.append(style['text-decoration'])
    if 'font-style' in style:
        emphasis.append(style['font-style'])
    if 'font-weight' in style:
        emphasis.append(style['font-weight'])
    return emphasis


def google_fixed_width_font(style):
    """
    Check if the css of the current element defines a fixed width font

    :type style: dict

    :rtype: bool
    """
    font_family = ''
    if 'font-family' in style:
        font_family = style['font-family']
    if 'Courier New' == font_family or 'Consolas' == font_family:
        return True
    return False


def list_numbering_start(attrs):
    """
    Extract numbering from list element attributes

    :type attrs: dict

    :rtype: int or None
    """
    if 'start' in attrs:
        try:
            return int(attrs['start']) - 1
        except ValueError:
            pass

    return 0


class HTML2Text(HTMLParser.HTMLParser):
    def __init__(self, out=None, baseurl='', bodywidth=config.BODY_WIDTH):
        """
        Input parameters:
            out: possible custom replacement for self.outtextf (which
                 appends lines of text).
            baseurl: base URL of the document we process
        """
        HTMLParser.HTMLParser.__init__(self)

        # Config options
        self.split_next_td = False
        self.td_count = 0
        self.table_start = False
        self.unicode_snob = config.UNICODE_SNOB
        self.escape_snob = config.ESCAPE_SNOB
        self.links_each_paragraph = config.LINKS_EACH_PARAGRAPH
        self.body_width = bodywidth
        self.skip_internal_links = config.SKIP_INTERNAL_LINKS
        self.inline_links = config.INLINE_LINKS
        self.google_list_indent = config.GOOGLE_LIST_INDENT
        self.ignore_links = config.IGNORE_ANCHORS
        self.ignore_images = config.IGNORE_IMAGES
        self.ignore_emphasis = config.IGNORE_EMPHASIS
        self.bypass_tables = config.BYPASS_TABLES
        self.google_doc = False
        self.ul_item_mark = '*'
        self.emphasis_mark = '_'
        self.strong_mark = '**'

        if out is None:
            self.out = self.outtextf
        else:
            self.out = out

        # empty list to store output characters before they are "joined"
        self.outtextlist = []

        self.quiet = 0
        self.p_p = 0  # number of newline character to print before next output
        self.outcount = 0
        self.start = 1
        self.space = 0
        self.a = []
        self.astack = []
        self.maybe_automatic_link = None
        self.absolute_url_matcher = re.compile(r'^[a-zA-Z+]+://')
        self.acount = 0
        self.list = []
        self.blockquote = 0
        self.pre = 0
        self.startpre = 0
        self.code = False
        self.br_toggle = ''
        self.lastWasNL = 0
        self.lastWasList = False
        self.style = 0
        self.style_def = {}
        self.tag_stack = []
        self.emphasis = 0
        self.drop_white_space = 0
        self.inheader = False
        self.abbr_title = None  # current abbreviation definition
        self.abbr_data = None  # last inner HTML (for abbr being defined)
        self.abbr_list = {}  # stack of abbreviations to write later
        self.baseurl = baseurl

        try:
            del unifiable_n[name2cp('nbsp')]
        except KeyError:
            pass
        config.UNIFIABLE['nbsp'] = '&nbsp_place_holder;'

    def feed(self, data):
        data = data.replace("</' + 'script>", "</ignore>")
        HTMLParser.HTMLParser.feed(self, data)

    def handle(self, data):
        self.feed(data)
        self.feed("")
        return self.optwrap(self.close())

    def outtextf(self, s):
        self.outtextlist.append(s)
        if s:
            self.lastWasNL = s[-1] == '\n'

    def close(self):
        HTMLParser.HTMLParser.close(self)

        try:
            nochr = unicode('')
        except NameError:
            nochr = str('')

        self.pbr()
        self.o('', 0, 'end')

        outtext = nochr.join(self.outtextlist)
        if self.unicode_snob:
            try:
                nbsp = unichr(name2cp('nbsp'))
            except NameError:
                nbsp = chr(name2cp('nbsp'))
        else:
            try:
                nbsp = unichr(32)
            except NameError:
                nbsp = chr(32)
        try:
            outtext = outtext.replace(unicode('&nbsp_place_holder;'), nbsp)
        except NameError:
            outtext = outtext.replace('&nbsp_place_holder;', nbsp)

        # Clear self.outtextlist to avoid memory leak of its content to
        # the next handling.
        self.outtextlist = []

        return outtext

    def handle_charref(self, c):
        self.o(self.charref(c), 1)

    def handle_entityref(self, c):
        self.o(self.entityref(c), 1)

    def handle_starttag(self, tag, attrs):
        self.handle_tag(tag, attrs, 1)

    def handle_endtag(self, tag):
        self.handle_tag(tag, None, 0)

    def previousIndex(self, attrs):
        """
        :type attrs: dict

        :returns: The index of certain set of attributes (of a link) in the
        self.a list. If the set of attributes is not found, returns None
        :rtype: int
        """
        if 'href' not in attrs:
            return None

        i = -1
        for a in self.a:
            i += 1
            match = 0

            if ('href' in a) and a['href'] == attrs['href']:
                if ('title' in a) or ('title' in attrs):
                        if (('title' in a) and ('title' in attrs) and
                                a['title'] == attrs['title']):
                            match = True
                else:
                    match = True

            if match:
                return i

    def handle_emphasis(self, start, tag_style, parent_style):
        """
        Handles various text emphases
        """
        tag_emphasis = google_text_emphasis(tag_style)
        parent_emphasis = google_text_emphasis(parent_style)

        # handle Google's text emphasis
        strikethrough = 'line-through' in \
            tag_emphasis and self.hide_strikethrough
        bold = 'bold' in tag_emphasis and not 'bold' in parent_emphasis
        italic = 'italic' in tag_emphasis and not 'italic' in parent_emphasis
        fixed = google_fixed_width_font(tag_style) and not \
            google_fixed_width_font(parent_style) and not self.pre

        if start:
            # crossed-out text must be handled before other attributes
            # in order not to output qualifiers unnecessarily
            if bold or italic or fixed:
                self.emphasis += 1
            if strikethrough:
                self.quiet += 1
            if italic:
                self.o(self.emphasis_mark)
                self.drop_white_space += 1
            if bold:
                self.o(self.strong_mark)
                self.drop_white_space += 1
            if fixed:
                self.o('`')
                self.drop_white_space += 1
                self.code = True
        else:
            if bold or italic or fixed:
                # there must not be whitespace before closing emphasis mark
                self.emphasis -= 1
                self.space = 0
            if fixed:
                if self.drop_white_space:
                    # empty emphasis, drop it
                    self.drop_white_space -= 1
                else:
                    self.o('`')
                self.code = False
            if bold:
                if self.drop_white_space:
                    # empty emphasis, drop it
                    self.drop_white_space -= 1
                else:
                    self.o(self.strong_mark)
            if italic:
                if self.drop_white_space:
                    # empty emphasis, drop it
                    self.drop_white_space -= 1
                else:
                    self.o(self.emphasis_mark)
            # space is only allowed after *all* emphasis marks
            if (bold or italic) and not self.emphasis:
                    self.o(" ")
            if strikethrough:
                self.quiet -= 1

    def handle_tag(self, tag, attrs, start):
        # attrs is None for endtags
        if attrs is None:
            attrs = {}
        else:
            attrs = dict(attrs)

        if self.google_doc:
            # the attrs parameter is empty for a closing tag. in addition, we
            # need the attributes of the parent nodes in order to get a
            # complete style description for the current element. we assume
            # that google docs export well formed html.
            parent_style = {}
            if start:
                if self.tag_stack:
                    parent_style = self.tag_stack[-1][2]
                tag_style = element_style(attrs, self.style_def, parent_style)
                self.tag_stack.append((tag, attrs, tag_style))
            else:
                dummy, attrs, tag_style = self.tag_stack.pop()
                if self.tag_stack:
                    parent_style = self.tag_stack[-1][2]

        if hn(tag):
            self.p()
            if start:
                self.inheader = True
                self.o(hn(tag) * "#" + ' ')
            else:
                self.inheader = False
                return  # prevent redundant emphasis marks on headers

        if tag in ['p', 'div']:
            if self.google_doc:
                if start and google_has_height(tag_style):
                    self.p()
                else:
                    self.soft_br()
            else:
                self.p()

        if tag == "br" and start:
            self.o("  \n")

        if tag == "hr" and start:
            self.p()
            self.o("* * *")
            self.p()

        if tag in ["head", "style", 'script']:
            if start:
                self.quiet += 1
            else:
                self.quiet -= 1

        if tag == "style":
            if start:
                self.style += 1
            else:
                self.style -= 1

        if tag in ["body"]:
            self.quiet = 0  # sites like 9rules.com never close <head>

        if tag == "blockquote":
            if start:
                self.p()
                self.o('> ', 0, 1)
                self.start = 1
                self.blockquote += 1
            else:
                self.blockquote -= 1
                self.p()

        if tag in ['em', 'i', 'u'] and not self.ignore_emphasis:
            self.o(self.emphasis_mark)
        if tag in ['strong', 'b'] and not self.ignore_emphasis:
            self.o(self.strong_mark)
        if tag in ['del', 'strike', 's']:
            if start:
                self.o("<" + tag + ">")
            else:
                self.o("</" + tag + ">")

        if self.google_doc:
            if not self.inheader:
                # handle some font attributes, but leave headers clean
                self.handle_emphasis(start, tag_style, parent_style)

        if tag in ["code", "tt"] and not self.pre:
            self.o('`')  # TODO: `` `this` ``
        if tag == "abbr":
            if start:
                self.abbr_title = None
                self.abbr_data = ''
                if ('title' in attrs):
                    self.abbr_title = attrs['title']
            else:
                if self.abbr_title is not None:
                    self.abbr_list[self.abbr_data] = self.abbr_title
                    self.abbr_title = None
                self.abbr_data = ''

        if tag == "a" and not self.ignore_links:
            if start:
                if ('href' in attrs) and \
                        (attrs['href'] is not None) and \
                        not (self.skip_internal_links and
                             attrs['href'].startswith('#')):
                    self.astack.append(attrs)
                    self.maybe_automatic_link = attrs['href']
                else:
                    self.astack.append(None)
            else:
                if self.astack:
                    a = self.astack.pop()
                    if self.maybe_automatic_link:
                        self.maybe_automatic_link = None
                    elif a:
                        if self.inline_links:
                            self.o("](" + escape_md(a['href']) + ")")
                        else:
                            i = self.previousIndex(a)
                            if i is not None:
                                a = self.a[i]
                            else:
                                self.acount += 1
                                a['count'] = self.acount
                                a['outcount'] = self.outcount
                                self.a.append(a)
                            self.o("][" + str(a['count']) + "]")

        if tag == "img" and start and not self.ignore_images:
            if 'src' in attrs:
                attrs['href'] = attrs['src']
                alt = attrs.get('alt') or ''
                self.o("![" + escape_md(alt) + "]")

                if self.inline_links:
                    href = attrs.get('href') or ''
                    self.o("(" + escape_md(href) + ")")
                else:
                    i = self.previousIndex(attrs)
                    if i is not None:
                        attrs = self.a[i]
                    else:
                        self.acount += 1
                        attrs['count'] = self.acount
                        attrs['outcount'] = self.outcount
                        self.a.append(attrs)
                    self.o("[" + str(attrs['count']) + "]")

        if tag == 'dl' and start:
            self.p()
        if tag == 'dt' and not start:
            self.pbr()
        if tag == 'dd' and start:
            self.o('    ')
        if tag == 'dd' and not start:
            self.pbr()

        if tag in ["ol", "ul"]:
            # Google Docs create sub lists as top level lists
            if (not self.list) and (not self.lastWasList):
                self.p()
            if start:
                if self.google_doc:
                    list_style = google_list_style(tag_style)
                else:
                    list_style = tag
                numbering_start = list_numbering_start(attrs)
                self.list.append({
                    'name': list_style,
                    'num': numbering_start
                })
            else:
                if self.list:
                    self.list.pop()
            self.lastWasList = True
        else:
            self.lastWasList = False

        if tag == 'li':
            self.pbr()
            if start:
                if self.list:
                    li = self.list[-1]
                else:
                    li = {'name': 'ul', 'num': 0}
                if self.google_doc:
                    nest_count = self.google_nest_count(tag_style)
                else:
                    nest_count = len(self.list)
                # TODO: line up <ol><li>s > 9 correctly.
                self.o("  " * nest_count)
                if li['name'] == "ul":
                    self.o(self.ul_item_mark + " ")
                elif li['name'] == "ol":
                    li['num'] += 1
                    self.o(str(li['num']) + ". ")
                self.start = 1

        if tag in ["table", "tr", "td", "th"]:
            if self.bypass_tables:
                if start:
                    self.soft_br()
                if tag in ["td", "th"]:
                    if start:
                        self.o('<{0}>\n\n'.format(tag))
                    else:
                        self.o('\n</{0}>'.format(tag))
                else:
                    if start:
                        self.o('<{0}>'.format(tag))
                    else:
                        self.o('</{0}>'.format(tag))

            else:
                if tag == "table" and start:
                    self.table_start = True
                if tag in ["td", "th"] and start:
                    if self.split_next_td:
                        self.o("| ")
                    self.split_next_td = True

                if tag == "tr" and start:
                    self.td_count = 0
                if tag == "tr" and not start:
                    self.split_next_td = False
                    self.soft_br()
                if tag == "tr" and not start and self.table_start:
                    # Underline table header
                    self.o("|".join(["---"] * self.td_count))
                    self.soft_br()
                    self.table_start = False
                if tag in ["td", "th"] and start:
                    self.td_count += 1

        if tag == "pre":
            if start:
                self.startpre = 1
                self.pre = 1
            else:
                self.pre = 0
            self.p()

    def pbr(self):
        if self.p_p == 0:
            self.p_p = 1

    def p(self):
        self.p_p = 2

    def soft_br(self):
        self.pbr()
        self.br_toggle = '  '

    def o(self, data, puredata=0, force=0):
        """
        Deal with indentation and whitespace
        """
        if self.abbr_data is not None:
            self.abbr_data += data

        if not self.quiet:
            if self.google_doc:
                # prevent white space immediately after 'begin emphasis'
                # marks ('**' and '_')
                lstripped_data = data.lstrip()
                if self.drop_white_space and not (self.pre or self.code):
                    data = lstripped_data
                if lstripped_data != '':
                    self.drop_white_space = 0

            if puredata and not self.pre:
                # This is a very dangerous call ... it could mess up
                # all handling of &nbsp; when not handled properly
                # (see entityref)
                data = re.sub(r'\s+', r' ', data)
                if data and data[0] == ' ':
                    self.space = 1
                    data = data[1:]
            if not data and not force:
                return

            if self.startpre:
                #self.out(" :") #TODO: not output when already one there
                if not data.startswith("\n"):  # <pre>stuff...
                    data = "\n" + data

            bq = (">" * self.blockquote)
            if not (force and data and data[0] == ">") and self.blockquote:
                bq += " "

            if self.pre:
                if not self.list:
                    bq += "    "
                #else: list content is already partially indented
                for i in range(len(self.list)):
                    bq += "    "
                data = data.replace("\n", "\n" + bq)

            if self.startpre:
                self.startpre = 0
                if self.list:
                    # use existing initial indentation
                    data = data.lstrip("\n")

            if self.start:
                self.space = 0
                self.p_p = 0
                self.start = 0

            if force == 'end':
                # It's the end.
                self.p_p = 0
                self.out("\n")
                self.space = 0

            if self.p_p:
                self.out((self.br_toggle + '\n' + bq) * self.p_p)
                self.space = 0
                self.br_toggle = ''

            if self.space:
                if not self.lastWasNL:
                    self.out(' ')
                self.space = 0

            if self.a and ((self.p_p == 2 and self.links_each_paragraph)
                           or force == "end"):
                if force == "end":
                    self.out("\n")

                newa = []
                for link in self.a:
                    if self.outcount > link['outcount']:
                        self.out("   [" + str(link['count']) + "]: " +
                                 urlparse.urljoin(self.baseurl, link['href']))
                        if 'title' in link:
                            self.out(" (" + link['title'] + ")")
                        self.out("\n")
                    else:
                        newa.append(link)

                # Don't need an extra line when nothing was done.
                if self.a != newa:
                    self.out("\n")

                self.a = newa

            if self.abbr_list and force == "end":
                for abbr, definition in self.abbr_list.items():
                    self.out("  *[" + abbr + "]: " + definition + "\n")

            self.p_p = 0
            self.out(data)
            self.outcount += 1

    def handle_data(self, data):
        if r'\/script>' in data:
            self.quiet -= 1

        if self.style:
            self.style_def.update(dumb_css_parser(data))

        if not self.maybe_automatic_link is None:
            href = self.maybe_automatic_link
            if href == data and self.absolute_url_matcher.match(href):
                self.o("<" + data + ">")
                return
            else:
                self.o("[")
                self.maybe_automatic_link = None

        if not self.code and not self.pre:
            data = escape_md_section(data, snob=self.escape_snob)
        self.o(data, 1)

    def unknown_decl(self, data):
        pass

    def charref(self, name):
        if name[0] in ['x', 'X']:
            c = int(name[1:], 16)
        else:
            c = int(name)

        if not self.unicode_snob and c in unifiable_n.keys():
            return unifiable_n[c]
        else:
            try:
                return unichr(c)
            except NameError:  # Python3
                return chr(c)

    def entityref(self, c):
        if not self.unicode_snob and c in config.UNIFIABLE.keys():
            return config.UNIFIABLE[c]
        else:
            try:
                name2cp(c)
            except KeyError:
                return "&" + c + ';'
            else:
                if c == 'nbsp':
                    return config.UNIFIABLE[c]
                else:
                    try:
                        return unichr(name2cp(c))
                    except NameError:  # Python3
                        return chr(name2cp(c))

    def replaceEntities(self, s):
        s = s.group(1)
        if s[0] == "#":
            return self.charref(s[1:])
        else:
            return self.entityref(s)

    def unescape(self, s):
        return config.RE_UNESCAPE.sub(self.replaceEntities, s)

    def google_nest_count(self, style):
        """
        Calculate the nesting count of google doc lists

        :type style: dict

        :rtype: int
        """
        nest_count = 0
        if 'margin-left' in style:
            nest_count = int(style['margin-left'][:-2]) \
                // self.google_list_indent

        return nest_count

    def optwrap(self, text):
        """
        Wrap all paragraphs in the provided text.

        :type text: str

        :rtype: str
        """
        if not self.body_width:
            return text

        assert wrap, "Requires Python 2.3."
        result = ''
        newlines = 0
        for para in text.split("\n"):
            if len(para) > 0:
                if not skipwrap(para):
                    result += "\n".join(wrap(para, self.body_width))
                    if para.endswith('  '):
                        result += "  \n"
                        newlines = 1
                    else:
                        result += "\n\n"
                        newlines = 2
                else:
                    # Warning for the tempted!!!
                    # Be aware that obvious replacement of this with
                    # line.isspace()
                    # DOES NOT work! Explanations are welcome.
                    if not config.RE_SPACE.match(para):
                        result += para + "\n"
                        newlines = 1
            else:
                if newlines < 2:
                    result += "\n"
                    newlines += 1
        return result


def skipwrap(para):
    # If the text begins with four spaces or one tab, it's a code block;
    # don't wrap
    if para[0:4] == '    ' or para[0] == '\t':
        return True

    # If the text begins with only two "--", possibly preceded by
    # whitespace, that's an emdash; so wrap.
    stripped = para.lstrip()
    if stripped[0:2] == "--" and len(stripped) > 2 and stripped[2] != "-":
        return False

    # I'm not sure what this is for; I thought it was to detect lists,
    # but there's a <br>-inside-<span> case in one of the tests that
    # also depends upon it.
    if stripped[0:1] == '-' or stripped[0:1] == '*':
        return True

    # If the text begins with a single -, *, or +, followed by a space,
    # or an integer, followed by a ., followed by a space (in either
    # case optionally proceeded by whitespace), it's a list; don't wrap.
    if config.RE_ORDERED_LIST_MATCHER.match(stripped) or \
            config.RE_UNORDERED_LIST_MATCHER.match(stripped):
        return True

    return False


def wrapwrite(text):
    text = text.encode('utf-8')
    try:  # Python3
        sys.stdout.buffer.write(text)
    except AttributeError:
        sys.stdout.write(text)


def html2text(html, baseurl='', bodywidth=config.BODY_WIDTH):
    h = HTML2Text(baseurl=baseurl, bodywidth=bodywidth)

    return h.handle(html)


def unescape(s, unicode_snob=False):
    h = HTML2Text()
    h.unicode_snob = unicode_snob

    return h.unescape(s)


def escape_md(text):
    """
    Escapes markdown-sensitive characters within other markdown
    constructs.
    """
    return config.RE_MD_CHARS_MATCHER.sub(r"\\\1", text)


def escape_md_section(text, snob=False):
    """
    Escapes markdown-sensitive characters across whole document sections.
    """
    text = config.RE_MD_BACKSLASH_MATCHER.sub(r"\\\1", text)

    if snob:
        text = config.RE_MD_CHARS_MATCHER_ALL.sub(r"\\\1", text)

    text = config.RE_MD_DOT_MATCHER.sub(r"\1\\\2", text)
    text = config.RE_MD_PLUS_MATCHER.sub(r"\1\\\2", text)
    text = config.RE_MD_DASH_MATCHER.sub(r"\1\\\2", text)

    return text


def main():
    baseurl = ''

    p = optparse.OptionParser('%prog [(filename|url) [encoding]]',
                              version='%prog ' + __version__)
    p.add_option(
        "--ignore-emphasis",
        dest="ignore_emphasis",
        action="store_true",
        default=config.IGNORE_EMPHASIS,
        help="don't include any formatting for emphasis"
    )
    p.add_option(
        "--ignore-links",
        dest="ignore_links",
        action="store_true",
        default=config.IGNORE_ANCHORS,
        help="don't include any formatting for links")
    p.add_option(
        "--ignore-images",
        dest="ignore_images",
        action="store_true",
        default=config.IGNORE_IMAGES,
        help="don't include any formatting for images"
    )
    p.add_option(
        "-g", "--google-doc",
        action="store_true",
        dest="google_doc",
        default=False,
        help="convert an html-exported Google Document"
    )
    p.add_option(
        "-d", "--dash-unordered-list",
        action="store_true",
        dest="ul_style_dash",
        default=False,
        help="use a dash rather than a star for unordered list items"
    )
    p.add_option(
        "-e", "--asterisk-emphasis",
        action="store_true",
        dest="em_style_asterisk",
        default=False,
        help="use an asterisk rather than an underscore for emphasized text"
    )
    p.add_option(
        "-b", "--body-width",
        dest="body_width",
        action="store",
        type="int",
        default=config.BODY_WIDTH,
        help="number of characters per output line, 0 for no wrap"
    )
    p.add_option(
        "-i", "--google-list-indent",
        dest="list_indent",
        action="store",
        type="int",
        default=config.GOOGLE_LIST_INDENT,
        help="number of pixels Google indents nested lists"
    )
    p.add_option(
        "-s", "--hide-strikethrough",
        action="store_true",
        dest="hide_strikethrough",
        default=False,
        help="hide strike-through text. only relevant when -g is "
             "specified as well"
    )
    p.add_option(
        "--escape-all",
        action="store_true",
        dest="escape_snob",
        default=False,
        help="Escape all special characters.  Output is less readable, but "
             "avoids corner case formatting issues."
    )
    p.add_option(
        "--bypass-tables",
        action="store_true",
        dest="bypass_tables",
        default=config.BYPASS_TABLES,
        help="Format tables in HTML rather than Markdown syntax."
    )
    (options, args) = p.parse_args()

    # process input
    encoding = "utf-8"
    if len(args) > 0:
        file_ = args[0]
        if len(args) == 2:
            encoding = args[1]
        if len(args) > 2:
            p.error('Too many arguments')

        if file_.startswith('http://') or file_.startswith('https://'):
            baseurl = file_
            j = urllib.urlopen(baseurl)
            data = j.read()
            if encoding is None:
                try:
                    from feedparser import _getCharacterEncoding as enc
                except ImportError:
                    enc = lambda x, y: ('utf-8', 1)
                encoding = enc(j.headers, data)[0]
                if encoding == 'us-ascii':
                    encoding = 'utf-8'
        else:
            data = open(file_, 'rb').read()
            if encoding is None:
                try:
                    from chardet import detect
                except ImportError:
                    detect = lambda x: {'encoding': 'utf-8'}
                encoding = detect(data)['encoding']
    else:
        data = sys.stdin.read()

    data = data.decode(encoding)
    h = HTML2Text(baseurl=baseurl)
    # handle options
    if options.ul_style_dash:
        h.ul_item_mark = '-'
    if options.em_style_asterisk:
        h.emphasis_mark = '*'
        h.strong_mark = '__'

    h.body_width = options.body_width
    h.list_indent = options.list_indent
    h.ignore_emphasis = options.ignore_emphasis
    h.ignore_links = options.ignore_links
    h.ignore_images = options.ignore_images
    h.google_doc = options.google_doc
    h.hide_strikethrough = options.hide_strikethrough
    h.escape_snob = options.escape_snob
    h.bypass_tables = options.bypass_tables

    wrapwrite(h.handle(data))


if __name__ == "__main__":
    main()