#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os, re, sys, codecs, difflib
from optparse import OptionParser
from subprocess import Popen, PIPE, call
from textwrap import TextWrapper, _whitespace
from collections import defaultdict, OrderedDict, Counter
from platform import system
from unicodedata import east_asian_width
from tempfile import NamedTemporaryFile

usage = "usage: %prog [options] commands\n" \
        "Without any command, it starts in interactive mode.\n" \
        "Read docs/translations.txt for details."
parser = OptionParser(usage=usage)
parser.add_option("--commit_author", help="Commit author",
            default="Translators <crawl-ref-discuss@lists.sourceforge.net>")
parser.add_option("-d", "--diff", help="Diff format (unified, context, n)",
                  default='n')
parser.add_option("-f", "--force", action="store_true",
                  help="Overwrite files even if no change detected")
parser.add_option("-l", "--language", help="Specify which languages to work on")
parser.add_option("-r", "--resource", help="Specify which resources to work on")
parser.add_option("-s", "--source", help="Work on source files (same as -l en)",
                  action="store_true")
parser.add_option("-t", "--translations", help="Work on translations",
                  action="store_true")
parser.add_option("-a", "--auto_fix", action="store_true",
                  help="Apply some automatic fixes to punctuation")

(options, args) = parser.parse_args()
cmd = args[0] if args else ''

# Absolute path to the source directory
tx_abs_path = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))

# Absolute path to the git root
git_root = os.path.abspath(os.path.join(tx_abs_path, "..", ".."))

# Relative path from the git root to the transifex directory
tx_rel_path = os.path.join('crawl-ref', 'source')

# Absolute path to the transifex config file
tx_config = os.path.join(tx_abs_path, '.tx', 'config')

# Relative path from the source directory to the descript directory
descript_tx_path = os.path.join('dat', 'descript')

# Relative path from the git root to the descript directory
descript_git_path = os.path.join(tx_rel_path, descript_tx_path)

# Absolute path to the descript directory
descript_abs_path = os.path.join(tx_abs_path, descript_tx_path)

try:
    os.chdir(descript_abs_path)
except OSError, e:
    sys.exit(e)

sep_re = re.compile('[, ]+') # basic separator for user input
txt_sep_re = re.compile('%{4,}') # txt file entry separator
cmd_re = re.compile('<(\w)>') # used to find the key in menu command strings
# Those languages have special wrapping with fullwidth character support
east_asian_languages = {'ja_JP', 'ko_KR', 'zh_CN'}
no_space_languages = {'ja_JP', 'zh_CN'}
east_asian_punctuation = u'、。，！：；）'

# This object serves as an intermediate step between txt and ini files.
# Entries are in a raw format: no wrapping, every new line is significant.
# they are indexed by [(lang, res)][key] and are of type Entry
raw_entries = defaultdict(OrderedDict)

# Main commands
def wrap_txt():
    txt_files.load_files()
    txt_files.merge_files()
    txt_files.update()
    menu.res_files = txt_files

def create_ini():
    txt_files.load_files()
    txt_files.merge_files()
    ini_files.load_files()
    ini_files.update()
    menu.res_files = ini_files

def merge_ini():
    txt_files.load_files()
    res_index.en_src = False # For en, load the fake translations
    ini_files.load_files()
    ini_files.merge_files()
    res_index.en_src = True
    txt_files.update()
    menu.res_files = txt_files

def setup_transifex():
    """Initialize the transifex config file"""
    
    os.chdir(tx_abs_path)
    call_tx(['init'])
    tx_set = ['set', '--auto-local', '-s', 'en_AU', '-t', 'INI', '--execute']
    for res in res_index.default_resources:
        res_file = res + '.ini'
        source_file = os.path.join(descript_tx_path, res_file)
        expr = os.path.join(descript_tx_path, '<lang>', res_file)
        call_tx(tx_set + ['-r', 'dcss.' + res, expr, '-f', source_file])
    os.chdir(descript_abs_path)

def call_tx(args, silent = False):
    """wrapper to call the transifex client"""
    
    if silent:
        stderr = open(os.devnull, 'wb')
    else:
        stderr = None

    # On windows, we need shell=True to search the PATH for the tx command
    if sys.platform == 'win32':
        python_path = os.path.split(sys.executable)[0]
        tx_path = os.path.join(python_path, 'Scripts', 'tx')
        return call(['python', tx_path] + args, stderr=stderr)
    else:
        return call(['tx'] + args, stderr=stderr)

# Utility functions
def title(text):
    """Add a dash square around a string. Used when showing a diff."""
    text = "### " + text + " ###"
    dash_line = "#" * len(text)
    text = dash_line + "\n" + text + "\n" + dash_line + "\n"
    return text

def unwrap(text, no_space):
    """Mostly replicates libutil.cc:unwrap_desc"""
    if not text:
        return ""

    # Protect all consecutive empty lines
    text = re.sub("\n{2,}", lambda m: r'\n' * len(m.group(0)), text)
    text = text.replace("\n ", "\\n ")

    # Don't unwrap lua separator at the beginning of a line
    text = text.replace("\n}}", "\\n}}")
    text = text.replace("\n{{", "\\n{{")

    text = text.replace(u"—\n—", u"——")
    text = text.replace(">\n<", "><")
    text = text.replace("\n", " ")
    text = text.replace("\\n", "\n")

    # Remove superfluous spaces surrounded by wide characters
    if no_space:
        i = 0
        j = text.find(" ")
        while j != -1:
           i += j
           # text has been rstriped so no risk of finding a space at the end
           if i and wide_char(text[i-1]) and wide_char(text[i+1]):
                text = text[:i] + text[i+1:]
           else:
                i += 1
           j = text[i:].find(" ")

    return text

def wrap(text, eac, no_space):
    """Wrap long lines using a TextWrapper object"""
    lines = []
    for line in text.splitlines():
        if line:
            # This allows breaking lines between tags
            line = line.replace("><", ">\f<")
            if no_space:
                # Need to rstrip the lines because when the wrapper tries to
                # add a single character to the end of the line, it might fail
                # and add an empty string, preventing the removal of whitespace
                lines += map(unicode.rstrip, FW_NS_wrapper.wrap(line))
            elif eac:
                lines += map(unicode.rstrip, FWwrapper.wrap(line))
            else:
                lines += wrapper.wrap(line)
        elif not lines or lines[-1] != '': # remove consecutive empty lines
            lines += ['']

    lines[:] = [line.replace(">\f<", "><") for line in lines]

# Languages which have no spaces are split on punctuation which make them
# sometimes wrapped to the beginning of the next line. Since it's quite ugly,
# we manually move them back to the end of the previous line.
    if eac or no_space:
        fixed_lines = []
        for line in lines:
            while line and line[0] in east_asian_punctuation and fixed_lines \
                  and fixed_lines[-1][-1] != line[0]:
                fixed_lines[-1] += line[0]
                line = line[1:]
                if line:
                    line = line.lstrip()
                else:
                    line = None
                    break

            if line is not None:
                fixed_lines.append(line)
        lines = fixed_lines

    return "\n".join(lines)

def diff(val, new_val):
    """Returns a diff showing the differences between 2 strings"""
    try:
        diff_func = {'unified': difflib.unified_diff,
                     'context': difflib.context_diff,
                     'n': difflib.ndiff}[options.diff]
    except KeyError:
        sys.exit("Invalid diff option: %s" % options.diff)
    return "\n".join(diff_func(val, new_val))

def progress(name, i, n):
    """Generic function for showing the progression of a treatment in percent"""
    print "\r%s %d%%" % (name, i * 100 / n),
    if i == n:
        print

def emphasize(s):
    """Add terminal control characters to a string to make it bright and
    underlined. Under windows, control characters are not supported so we just
    surround the string in chevrons"""
    if system() != 'Windows':
        return u'\033[1m\033[4m%s\033[0m' % s
    else:
        return '<' + s + '>'

def change_counter(c):
    return " ".join(["%s:%-3d" % (k, c[k]) if c[k] else " " * (len(k) + 4) \
                     for k in sorted(res_index.changes)])

def wide_char(c):
    return c != u'—' and east_asian_width(c) in 'WFA'

def auto_fix(s, lang):
    """Use with care, it can break things"""
    s = auto_fix.re_hyphen.sub(u"\\1—\\2", s)
    s = auto_fix.re_ns.sub(u" \\1", s)
    if lang == 'fr': # Those ones can break languages which use »« for quotes
        s = auto_fix.re_ns_opening_quote.sub(u"« ", s)
        s = auto_fix.re_ns_closing_quote.sub(u" »", s)
        s = auto_fix.re_missing_space.sub(u" \\1", s)
        s = auto_fix.re_missing_space2.sub(u"« ", s)

    if s.find('{{') == -1: # Don't mess with lua strings
        s = auto_fix.re_ascii_single_quotes.sub(u"‘\\1’", s)
        s = auto_fix.re_ascii_double_quotes.sub(u"“\\1”", s)

    # replace english quotes by localized ones
    if lang == 'fr':
        s = auto_fix.re_english_double_quotes.sub(u"« \\1 »", s)
        s = auto_fix.re_english_single_quotes.sub(u"“\\1”", s)
    elif lang == 'de' or lang == 'cs':
        s = auto_fix.re_english_single_quotes.sub(u"‚\\1‘", s)
        s = auto_fix.re_english_double_quotes.sub(u"„\\1“", s)
    elif lang == 'da':
        s = auto_fix.re_english_single_quotes.sub(u"„\\1“", s)
        s = auto_fix.re_english_double_quotes.sub(u"»\\1«", s)
    elif lang == 'el' or lang == 'es' or lang == 'it' or lang == 'pt':
        s = auto_fix.re_english_double_quotes.sub(u"«\\1»", s)
        s = auto_fix.re_english_single_quotes.sub(u"“\\1”", s)
    elif lang == 'fi':
        s = auto_fix.re_english_single_quotes.sub(u"’\\1’", s)
        s = auto_fix.re_english_double_quotes.sub(u"”\\1”", s)
    elif lang == 'ja':
        s = auto_fix.re_english_single_quotes.sub(u"『\\1』", s)
        s = auto_fix.re_english_double_quotes.sub(u"「\\1」", s)
    elif lang == 'lt':
        s = auto_fix.re_english_single_quotes.sub(u"„\\1”", s)
        s = auto_fix.re_english_double_quotes.sub(u"„\\1”", s)
    elif lang == 'lv' or lang == 'ru':
        s = auto_fix.re_english_double_quotes.sub(u"«\\1»", s)
        s = auto_fix.re_english_single_quotes.sub(u"„\\1”", s)
    elif lang == 'pl' or lang == 'hu':
        s = auto_fix.re_english_single_quotes.sub(u"»\\1«", s)
        s = auto_fix.re_english_double_quotes.sub(u"„\\1”", s)
    return s

auto_fix.re_hyphen = re.compile("(\s)[-–](\s)") # Replace hyphens by em dashes
auto_fix.re_ns = re.compile("\s([!?:;])")
auto_fix.re_ns_opening_quote = re.compile(u"«\s")
auto_fix.re_ns_closing_quote = re.compile(u"\s»")
auto_fix.re_missing_space = re.compile(u"(?<=\w)([!?:;»](?!\d))", re.U)
auto_fix.re_missing_space2 = re.compile(u"«(?=\w)", re.U)

auto_fix.re_ascii_single_quotes = re.compile(u"(?<=\W)'(.*?)'(?=\W)", re.S)
auto_fix.re_ascii_double_quotes = re.compile(u'"(.*?)"', re.S)
auto_fix.re_english_single_quotes = re.compile(u'‘([^‚‘’]*?)’', re.S)
auto_fix.re_english_double_quotes = re.compile(u'“(.*?)”', re.S)

"""Subclasses to properly handle wrapping fullwidth unicode character which take
2 columns to be displayed on a terminal
See http://code.activestate.com/lists/python-list/631628/"""
class FullWidthUnicode(unicode):
    def __len__(self):
        return sum(2 if wide_char(c) else 1 for c in self)

    def __getslice__(self, i, j):
        k = 0
        while k < i:
            if wide_char(self[k]):
                i -= 1
            k += 1
        k = i
        while k < j and k < unicode.__len__(self):
            if wide_char(self[k]):
                j -= 1
            k += 1
        return FullWidthUnicode(unicode.__getslice__(self, i, j))

class FullWidthTextWrapper(TextWrapper):
    def __init__(self, **kwargs):
        if 'no_space' in kwargs:
            kwargs.pop('no_space')
            # Those languages don't use spaces. Break lines on punctuation.
            self.wordsep_simple_re = re.compile(u'([\s%s]+)|(—)(?=—)' % east_asian_punctuation)
        TextWrapper.__init__(self, **kwargs)

    def _split(self, text):
        return map(FullWidthUnicode, TextWrapper._split(self, text))

class ResourceIndex():
    """Class which holds current language / resource settings and serves as an
    iterator for ResourceCollection.
    self.changes holds a list of the types of change currently selected
    (changed, new or removed). This is used to select which value to
    display when iterating through entries for showing a diff or writing a
    resource file.
    Note that not selecting "removed" only affects diffs and temporary files
    created for editing. When writing the resource file, removed keys are never
    written no matter what is in the changes array."""
    
    def __init__(self):
        self.default_languages = [ 'en' ]
        self.default_resources = []
        self.languages = []
        self.resources = []
        self.en_src = True # When True, the english language maps to the source
                           # files. When False, it maps to the fake translations
        self.changes = []
        lang_re = re.compile("[a-z]{2}_[A-Z]{2}")

        # Initialize languages with directories in the descript dir
        # and resource with txt files
        for f in sorted(os.listdir('.')):
            (basename, ext) = os.path.splitext(f)
            if ext.lower() == '.txt':
                self.default_resources.append(basename)
            elif os.path.isdir(f) and lang_re.match(f):
                self.default_languages.append(f)
                if not os.path.exists(f[:2]):
                    os.makedirs(f[:2])

        if options.source:
            self.languages = ['en']
        elif options.language:
            self.set_languages(options.language)
        elif options.translations:
            self.languages = self.default_languages[1:]
        else:
            self.languages = self.default_languages[:]

        if options.resource:
            self.set_resources(options.resource)
        else:
            self.resources = self.default_resources[:]

    def __iter__(self):
        return iter([('',r) if self.en_src and l == 'en' else (l, r) \
                    for l in self.languages for r in self.resources])

    def __len__(self):
        return len(self.languages) * len(self.resources)

    def __str__(self):
        s = ''
        for index_t in "languages", "resources":
            index = getattr(self, index_t)
            s += index_t.title() + ": "
            if self.is_default(index_t):
                s += "All (%d)\n" % len(index)
            else:
                s += ", ".join(index) + "\n"
        return s

    def is_default(self, index_t):
        index = getattr(self, index_t)
        default_index = getattr(self, "default_" + index_t)
        return len(index) == len(default_index)

    def print_index(self, index_t, only_selected = False):
        index = getattr(self, index_t)
        default_index = getattr(self, "default_" + index_t)
        if only_selected:
            idx_l = index
        else:
            idx_l = [emphasize(i) if i in index else i for i in default_index]
        print "%s: %s" % (index_t.title(), ", ".join(idx_l))

    def set_index(self, index_t, opt):
        """When opt is True, the method is being called during program startup
        with the option value as argument. This reduce the verbosity compared to
        calling it in interactive mode."""

        if not opt:
            self.print_index(index_t)
        index = getattr(self, index_t)
        default_index = getattr(self, "default_" + index_t)

        if opt:
            a = opt
        else:
            a = raw_input("Select %s (Empty reset to defaults): " % index_t)

        del index[:]
        for i in sep_re.split(a):
            if i in default_index:
                index.append(i)
            elif i:
                matches = [m for m in default_index if m.startswith(i)]
                if len(matches) == 1:
                    index.append(matches[0])
                elif not matches:
                    print >> sys.stderr, "Invalid %s: %s" % (index_t[:-1], i)
                else:
                    print >> sys.stderr, "Multiple matches for %s: %s" \
                                         % (i, ", ".join(matches))

        if not index:
            setattr(self, index_t, default_index[:])
            print "Reset %s to default" % index_t
        elif not opt:
            print
            self.print_index(index_t, True)

    def set_languages(self, opt = ''):
        self.set_index('languages', opt)

    def set_resources(self, opt = ''):
        self.set_index('resources', opt)

    def set_changes(self, change_t_list):
        self.changes = change_t_list

    def get_index(self, index_t):
        return getattr(self, index_t)[0]

    def next_index(self, index_t):
        element = self.get_index(index_t)
        default_index = getattr(self, "default_" + index_t)
        if default_index[-1] == element:
            setattr(self, index_t, [default_index[0]])
        else:
            setattr(self, index_t, [default_index[default_index.index(element) + 1]])

class Entry():
    """Class for a raw entry. Elements of raw_entries are of this type."""
    def __init__(self):
        self.value = ''
        self.tags = OrderedDict()

    def __getitem__(self, key):
        if key in self.tags:
            return self.tags[key]
        else:
            return ''

    def __setitem__(self, key, value):
        self.tags[key] = value

class TxtEntry():
    """This class is only used when reading a txt file. Instances of this class
    are never stored, we directly store values in ResourceFile."""
    def __init__(self):
        self.key = ""
        self.value = ""
        self.key_comment = ""
        self.value_comment = ""

    def save(self, res_file):
        res_file.entries[self.key] = self.value
        if self.key_comment:
            res_file.key_comment[self.key] = self.key_comment
        if self.value_comment:
            res_file.value_comment[self.key] = self.value_comment
        self.__init__()

class ResourceFile():
    """Holds all the logic which is common between txt and ini files.
    self.entries hold the dictionary of key/value read from the file. It is
    initialized in the subclasses because source files use an OrderedDict.
    self.diff have a dictionary per change type with the new values."""
    def __init__(self, lang, res):
        self.diff = defaultdict(dict)
        self.language = lang
        self.resource = res
        self.path = res + "." + self.ext
        self.path = os.path.join(self.lang_dir, self.path)
        self.git_path = os.path.join(descript_git_path, self.path).replace("\\", "/")
        self.mtime = 0
        self.modified = False
        self.staged = False
        self.new = False

    def __setitem__(self, key, value):
        """Called by the subclass which has already done the conversion.
        Determine the change type and store the new value in the appropriate
        dict of self.diff"""
        if key not in self.entries:
            change_t = 'new'
        elif value != self.entries[key]:
            change_t = 'changed'
        else:
            return
        self.diff[change_t][key] = value

        # If the key was previously removed and edited back in
        # delete it from the 'removed' dict
        if key in self.diff['removed']:
            del self.diff['removed'][key]

    def items(self, diff_only):
        """Returns an iterator to a list of (key, value) tuples, depending on
        what is selected in res_index.changes and what is found in self.diff.
        When diff_only is true, only return changed or new values (for diff and
        edit). When it is false, return the original value for unchanged ones
        (for writing file)."""
        
        items = []
        for key in self.source_keys():
            found_diff = False
            for change_t in res_index.changes:
                if change_t == 'removed' or change_t not in self.diff: continue
                if key in self.diff[change_t]:
                    items.append((key, self.diff[change_t][key]))
                    found_diff = True
            if not found_diff and not diff_only and key in self.entries \
               and not key in self.diff['removed']:
                items.append((key, self.entries[key]))

        return iter(items)

    def diff_count(self):
        """Returns a Counter object representing what's in self.diff"""
        c = Counter()
        for change_t in self.diff:
            count = len(self.diff[change_t])
            if count:
                c[change_t] = count
        return c

    def lang(self):
        """Source files have self.language empty, but they are in english"""
        return self.language if self.language else 'en'

    def clear(self, keep_entries = False):
        if not keep_entries:
            self.entries.clear()
        self.diff.clear()

    def changed(self):
        """Returns true if there are pending change for the file depending on
        what is selected in res_index.changes"""
        for change_t in res_index.changes:
            if change_t in self.diff:
                return True
        return False

    def source_keys(self):
        """Returns an ordered list of the keys of the source corresponding to
        this resource file. This list is used as a reference when iterating
        through keys. It helps keep the order consistent and translations can't
        exist if there isn't a source associated to them anyway."""
        keys = self.source_res.entries.keys()

        # To allow submitting new quotes from another resource, they are sorted
        if self.resource == 'quotes' and 'new' in self.diff:
            for k in self.diff['new']:
                if k not in keys:
                    keys.append(k)
            keys.sort()
        return keys

    def diff_txt(self, diff_format):
        """When diff_format is True, returns a string with a diff for each new
        or changed entry. When it is False, returns the new value instead (for
        editing purpose)."""
        diff_txt = ''
        for (key, value) in self.items(True):
            if key in self.entries:
                orig = self.format_entry(key, self.entries[key])
            else:
                orig = ""
            value = self.format_entry(key, value)
            if diff_format:
                diff_txt += diff(orig.splitlines(), value.splitlines()) + "\n"
            else:
                diff_txt += value
            diff_txt += self.separator()

        if 'removed' in res_index.changes and 'removed' in self.diff:
            for k, v in self.diff['removed'].items():
                value = self.format_entry(k, v)
                if diff_format:
                    diff_txt += diff(value.splitlines(), []) + "\n"
                else:
                    diff_txt += value
                diff_txt += self.separator()

        return diff_txt

    def load(self):
        if not self.entries and not self.diff:
            self.read_file()

    def read_file(self):
        """Called by the subclasses to handle the basic checks. Returns the
        content of the file (list of lines) to the subclass which does the
        actual parsing."""
        if not os.path.exists(self.path):
            return []

        # If the corresponding source file isn't loaded we load it first
        if self.language and not len(self.source_keys()):
            self.source_res.read_file()

        # Don't reload the file if it hasn't changed since we loaded it before.
        file_mtime = os.stat(self.path).st_mtime
        if self.mtime == file_mtime:
            self.clear(True)
            return []
        else:
            self.clear()
            self.mtime = file_mtime

        return codecs.open(self.path, encoding='utf-8').readlines()

    def merge_file(self):
        """Iterate through the entries loaded from the file, convert them in a
        raw format and store them in raw_entries"""
        entries = raw_entries[(self.lang(), self.resource)]
        entries.clear()
        for (key, value) in self.entries.items():
            entries[key] = self.raw_entry(value)
            
    def update(self, update_removed_keys = True):
        """Update the resource file with the content of raw_entries. New values
        will be converted in the resource format and stored in the appropriate
        diff dictionary by the __setitem__ methods"""
        entries = raw_entries[(self.lang(), self.resource)]
        for key in self.source_keys():
            if key not in entries: continue
            self[key] = entries[key]
        if update_removed_keys and (self.lang() != 'en' or self.ext == 'ini'):
            self.update_removed_keys()

    def write_file(self):
        """Write the content of the resource to a file"""
        f = codecs.open(self.path, "w", encoding='utf-8')
        f.write(self.header())
        for key, e in self.items(False):
            f.write(self.format_entry(key, e))
            f.write(self.separator())
        self.modified = True
        self.mtime = 0

    def update_removed_keys(self):
        """If the resource has keys which are not present in the source, they
        will be removed. Store them in self.diff['removed'] to show them in diff
        and allow editing (useful to fix renamed keys)."""
        entries = raw_entries[(self.lang(), self.resource)]
        for k in self.entries.keys():
            if k not in self.source_keys() or k not in entries:
                self.diff['removed'][k] = self.entries[k]

    def edit_file(self):
        """Create a temporary file with the values of the changed keys, start
        a text editor, then load the file."""
        tmp = NamedTemporaryFile(prefix=self.language + "-" + self.resource,
                                 suffix="." + self.ext, delete=False)
        tmp.file.write(self.diff_txt(False).encode('utf-8'))
        tmp.file.close()
        EDITOR = os.environ.get('EDITOR','vim')
        try:
            call([EDITOR, tmp.name])
        except OSError:
            print >> sys.stderr, "Cannot start text editor." \
                                 "Set the EDITOR environement variable."
            return False
        tmp_res = self.__class__(self.language, self.resource)
        tmp_res.path = tmp.name
        tmp_res.read_file()
        tmp_res.merge_file()
        os.remove(tmp.name)
        self.update(False)
        return True

class TxtFile(ResourceFile):
    """Subclass of ResourceFile to handle files in crawl's native format of
    description files."""
    def __init__(self, lang, res):
        if lang:
            self.entries = dict()
            self.source_res = txt_files[('', res)]
            self.lang_dir = lang[:2]
        else:
            self.entries = OrderedDict()
            self.source_res = self
            self.lang_dir = ''
        self.key_comment = dict()
        self.value_comment = dict()
        self.ext = 'txt'
        self.eac = lang in east_asian_languages
        self.no_space = lang in no_space_languages
        ResourceFile.__init__(self, lang, res)

    def __setitem__(self, key, entry):
        """Converts a generic entry in txt format then calls the base class
        __setitem__ method to store it in the appropriate self.diff dict"""
        value = ""
        for tag, tag_value in entry.tags.items():
            # If it has a quote tag, we store the new quote in its own entry
            if tag == 'quote':
                e = Entry()
                e.value = tag_value
                quote_res = txt_files[(self.language, 'quotes')]
                quote_res.load()
                quote_res[key] = e

                # add the quote resource to the index
                if 'quotes' not in res_index.resources:
                    res_index.resources.append('quotes')

                # If we're adding a foreign quote and the source doesn't have
                # one, we also create it in the corresponding source
                if self.language and key not in quote_res.source_res.entries:
                    en_quote_res = txt_files[('', 'quotes')]
                    en_quote_res.load()
                    en_quote_res[key] = e

                    # Add english to the index
                    if 'en' not in res_index.languages:
                        res_index.languages.insert(0, 'en')

            elif tag_value is True:
                value += ":%s\n" % tag
            else:
                value += ":%s %s\n" % (tag, tag_value)

        if options.auto_fix:
            raw_value = auto_fix(entry.value, self.lang())
        else:
            raw_value = entry.value

        if entry['nowrap']:
            value += raw_value
        else:
            value += wrap(raw_value, self.eac, self.no_space)

        value += "\n"
        ResourceFile.__setitem__(self, key, value)

    def format_entry(self, key, value):
        """Convert the key/value pair in crawl's native desc format"""
        ret = self.key_comment.get(key, "")
        ret += key + "\n\n"
        ret += self.value_comment.get(key, "")
        ret += value
        return ret

    def header(self):
        """Added to the beginning of the file"""
        return self.separator()

    def separator(self):
        """Separate entries in the file"""
        return "%%%%\n"

    def raw_entry(self, value):
        """Convert a value in txt format to a raw entry."""
        e = Entry()
        for line in value.splitlines():
            if len(line) > 1 and line[0] == ':' and line[1] != ' ':
                l = line[1:].rstrip().split(' ', 1)
                e[l[0]] = l[1] if len(l) == 2 else True
            else:
                e.value += line + "\n"
        e.value = e.value.rstrip()
        if not e['nowrap']:
            e.value = unwrap(e.value, self.no_space)
        return e

    def read_file(self):
        """Parse the content of a txt file and stores it in self.entries"""
        te = TxtEntry()
        for line in ResourceFile.read_file(self):
            if line[0] == '#':
                if te.key:
                    te.value_comment += line
                else:
                    te.key_comment += line
            elif txt_sep_re.match(line):
                if te.key:
                    te.save(self)
            elif line[0] == '\n' and not te.value:
                continue
            elif not te.key:
                te.key = line.strip()
            else:
                te.value += line

        if te.key:
            te.save(self)

        return len(self.entries)

    def search_removed_keys(self):
        # No removed key in the source, it's the reference
        if self.language:
            ResourceFile.search_removed_keys(self)

class IniFile(ResourceFile):
    """Subclass of ResourceFile to handle files in ini format to be pushed to
    or pulled from transifex."""
    def __init__(self, lang, res):
        self.entries = dict()
        self.source_res = txt_files[('', res)]
        self.ext = 'ini'
        self.lang_dir = lang
        ResourceFile.__init__(self, lang, res)

    def __setitem__(self, key, e):
        """Converts a generic entry in ini format then calls the base class
        __setitem__ method to store it in the appropriate self.diff dict"""

        # Delete entries with only a link. There's no point in translating them.
        if len(e.value) > 1 and e.value[0] == '<' and e.value[-1] == '>'\
           and e.value.find("\n") == -1 and e.value[1:].find("<") == -1:
            if key in self.entries:
                self.diff['removed'][key] = self.entries[key]
                del self.entries[key]
            return

        value = ""
        for tag, tag_value in e.tags.items():
            if tag_value is True:
                value += r":%s\n" % tag
            else:
                value += r":%s %s\n" % (tag, tag_value)
        value += e.value.replace("\n", r'\n') + "\n"
        ResourceFile.__setitem__(self, key, value)

    def header(self):
        return ""

    def separator(self):
        return ""

    def format_entry(self, key, value):
        """Convert the key/value pair in ini format"""
        return "%s=%s" % (key, value)

    def read_file(self):
        """Parse the content of an ini file and stores it in self.entries"""
        for line in ResourceFile.read_file(self):
            if not line or line[0] == '#' or line.find('=') == -1: continue
            (key, value) = line.split('=', 1)
            self.entries[key] = value.replace('&quot;', '"').replace('\\\\', '\\')

        return len(self.entries)

    def raw_entry(self, value):
        """Convert a value in ini format to a raw entry."""
        e = Entry()
        tag_name = ''
        for line in value.rstrip().split(r'\n'):
            if len(line) > 1 and line[0] == ':' and line[1] != ' ':
                if not e.value:
                    l = line[1:].split(' ', 1)
                    e[l[0]] = l[1] if len(l) == 2 else True
                else:
                    tag_name = line[1:]
            elif tag_name:
                if e[tag_name]:
                    e[tag_name] += "\n"
                e[tag_name] += line
            else:
                e.value += line + "\n"
        e.value = e.value.rstrip()
        return e

class ResourceCollection(OrderedDict):
    """A container class holding a collection of resource files. It uses
    res_index to iterate through its resources"""
    def __init__(self):
        OrderedDict.__init__(self)
        self.diff_count = Counter()
        self.git_count = Counter()
        self.modified = False

    def __iter__(self):
        return iter([self[res_i] for res_i in res_index])

    def __len__(self):
        return len(res_index)

    def clear(self):
        self.diff_count.clear()
        self.modified = False

    def paths(self):
        return [res.path for res in self]

    def merge_files(self):
        for i, res in enumerate(self, start=1):
            progress("Merging %s files" % self.ext, i, len(self))
            res.merge_file()

    def load_files(self):
        self.clear()
        n_files = n_entries = 0
        for i, res in enumerate(self, start=1):
            progress("Loading %s files" % self.ext, i, len(self))
            n = res.read_file()
            if n:
                n_files += 1
                n_entries += n
        if n_files:
            print "Loaded %d entr%s from %d %s file%s" \
                  % (n_entries, ["y", "ies"][n_entries!=1],
                     n_files, self.ext, "s"[n_files==1:])

    def update(self):
        for i, res in enumerate(self, start=1):
            progress("Updating %s files" % self.ext, i, len(self))
            res.update()
        self.update_diff_count()

    def update_diff_count(self):
        self.diff_count.clear()
        for res in self:
            self.diff_count += res.diff_count()
        res_index.changes = self.diff_count.keys()

    def diff(self, diff_format):
        diff_text = ''
        for res in self:
            if res.changed():
                diff_text += title(res.path) + "\n"
                diff_text += res.diff_txt(diff_format) + "\n"
        return diff_text

    def show_diff(self):
        diff_text = self.diff(True)
        try:
            Popen("less", stdin=PIPE).communicate(diff_text.encode('utf-8'))
        except OSError:
            print diff_text

    def edit_files(self):
        for res in self:
            if res.changed():
                if not res.edit_file():
                    break
        self.update_diff_count()

    def write_files(self):
        for res in self:
            if res.changed() or options.force and list(res.items(False)):
                res.write_file()
                for change_t in res_index.changes:
                    if change_t in res.diff:
                        del res.diff[change_t]
        self.update_diff_count()

    def undo_changes(self):
        for res in self:
            res.clear(True)
        self.diff_count.clear()

class TxtCollection(ResourceCollection):
    """Collection of txt files. It holds a few git methods"""
    def __init__(self):
        self.ext = 'txt'
        ResourceCollection.__init__(self)

    def __missing__(self, key):
        self[key] = TxtFile(*key)
        return self[key]

    def refresh_state(self):
        """Run git status and check the result for each file in the collection"""
        if not git: return

        git_states = dict()
        self.git_count.clear()
        for line in Popen(["git", "status", "--porcelain"] + self.paths(),
                          stdout=PIPE).communicate()[0].splitlines():
            git_states[line[3:]] = line[0:2]
        for res in self:
            if res.git_path not in git_states:
                res.modified = res.staged = res.new = False
                continue

            st = git_states[res.git_path]
            if st[0] == 'M' or st[0] == 'A':
                res.staged = True
                self.git_count['staged'] += 1
            if st[1] == 'M':
                res.modified = True
                self.git_count['modified'] += 1
            elif st == '??':
                res.new = True
                self.git_count['new'] += 1

    def git_status(self):
        call(["git", "status"] + self.paths())
        
    def git_add_hunks(self):
        self.git_add(True)

    def git_add(self, hunks = False):
        files = []
        for res in self:
            if res.modified or res.new:
                files.append(res.path)

        cmd_list = ['git', 'add']
        if hunks:
            cmd_list.append('-p')
        cmd_list += files
        call(cmd_list)

    def git_reset(self):
        files = []
        for res in self:
            if res.modified:
                files.append(res.path)
            elif res.new:
                os.remove(res.path)

        cmd_list = ['git', 'checkout']
        cmd_list += files
        call(cmd_list)

class IniCollection(ResourceCollection):
    """Collection of ini files with methods to interface with the transifex
    client push and pull commands"""
    def __init__(self):
        self.ext = 'ini'
        ResourceCollection.__init__(self)

    def __missing__(self, key):
        self[key] = IniFile(*key)
        return self[key]

    def refresh_state(self):
        self.modified = False
        for res in self:
            if res.modified:
                self.modified = True

    def tx_pull(self):
        tx_cmd = ['pull']
        if options.force:
            tx_cmd.append('-f')
        all_lang = res_index.is_default('languages')
        all_res = res_index.is_default('resources')
        if all_lang and all_res:
            call_tx(tx_cmd + ['-a'])
        elif all_res:
            for lang in res_index.languages:
                call_tx(tx_cmd + ['-l', lang])
        elif all_lang:
            for res in res_index.resources:
                call_tx(tx_cmd + ['-r', 'dcss.' + res])
        else:
            for res in self:
                call_tx(tx_cmd + ['-l', res.lang(), '-r', 'dcss.' + res.resource])

    def tx_push(self):
        tx_push = ['push']
        if options.force:
            tx_push.append('-f')
        for res in self:
            if not res.modified: continue
            resource = ['-r', 'dcss.' + res.resource]
            language = ['-l', res.lang()]
            if not res.language:
                # We push the source then reset the fake translation resource
                ret = call_tx(tx_push + ['-s'] + resource)
                if self[('en', res.resource)].entries:
                    a = raw_input("Reset the %s fake translation (y/n)? " % res.resource).lower()
                    if a and a[0] == 'y':
                        call_tx(['delete', '-f'] + language + resource)
            else:
                ret = call_tx(tx_push + ['-t'] + language + resource)
            if ret == 0:
                res.modified = False

class Menu(OrderedDict):
    """Create a simple text based interactive menu.
    The inherited OrderedDict is used to store groups of commands
    cmds keys are the command hotkey letter, values are either a function or a
    list whose first member is the function and the next ones are arguments.
    cmd is the command string, it can be used to queue several commands.
    res_files points to the current resource file collection which is being
    worked on."""
    
    def __init__(self, cmd = ''):
        OrderedDict.__init__(self)
        self.cmds = dict()
        self.cmd = cmd
        self.menu_desc = ''
        self.res_files = txt_files
        self.show_res = len(res_index.languages) == 1

    def __missing__(self, key):
        self[key] = []
        return self[key]

    def change_summary(self):
        if not self.res_files.diff_count:
            print  "No changes\n"
            return

        print "Change summary:"
        lang_total = defaultdict(Counter)
        padding_size = 5

        for res in self.res_files:
            if not res.diff: continue
            if self.show_res:
                padding_size = max(padding_size, len(res.path))
            else:
                lang_total[res.lang()] += res.diff_count()

        cur_lang = ''
        for res in self.res_files:
            if not res.diff: continue
            lang = res.lang()
            if lang != cur_lang and lang_total[lang]:
                print "%-*s %s" % (padding_size, lang,
                                   change_counter(lang_total[lang]))
            cur_lang = lang
            if self.show_res:
                print "%-*s %s" % (padding_size, res.path,
                                   change_counter(res.diff_count()))

        print "%-*s %s" % (padding_size, 'Total',
                           change_counter(self.res_files.diff_count))
        print

    def git_summary(self):
        if not self.res_files.git_count:
            return

        padding_size = 5
        print "Git status:"
        for key, count in self.res_files.git_count.most_common():
            print "%-*s: %d" % (padding_size, key, count)
        print

    def git_commit(self):
        call(['git', 'commit', '-e', '-s', '-m', '[Transifex]',
              '--author=' + options.commit_author])

    def toggle_details(self):
        self.show_res = not self.show_res

    def set_languages(self):
        res_index.set_languages()
        self.res_files.update_diff_count()
        self.show_res = len(res_index.languages) == 1

    def set_resources(self):
        res_index.set_resources()
        self.res_files.update_diff_count()

    def set_changes(self):
        """Creates a submenu to select which kind of change to work on."""
        submenu = Menu()
        lbl = "Select entries"
        change_ts = self.res_files.diff_count.keys()
        for type in change_ts + ['all']:
            cmd_lbl = '<' + type[0] + '>' + type[1:]
            if type == 'all':
                submenu.add_cmd(lbl, cmd_lbl, [res_index.set_changes, change_ts])
            else:
                submenu.add_cmd(lbl, cmd_lbl, [res_index.set_changes, [type]])
        submenu.build_menu_desc()
        submenu.show_menu()

    def next_index(self, index_t):
        """When only one index is selected (language or resource), this commands
        allows to jump to the next one. It will search for one with pending
        changes. If none is found after having looped through all of them, we
        simply select the next one"""
        current = res_index.get_index(index_t)
        while 1:
            res_index.next_index(index_t)
            self.res_files.update_diff_count()
            if self.res_files.diff_count or current == res_index.get_index(index_t):
                break

        # If we haven't found something with a change, we looped. In this case,
        # we advance one more time.
        if not self.res_files.diff_count:
            res_index.next_index(index_t)

        res_index.print_index(index_t, True)

    def add_cmd(self, group, label, cmd):
        """Adds a command to the menu. The label must contain a letter between
        chevrons which will be the command hotkey"""
        m = cmd_re.search(label)
        if not m: sys.exit("Invalid command: %s" % label)
        key = m.group(1)
        if key in self: sys.exit("Duplicate command for key %s: %s and %s" \
                                 % (key, label, self[key]))
        if system() != 'Windows':
            label = label.replace("<" + key  + ">", emphasize(key))
        self[group].append(label)
        self.cmds[key] = cmd

    def build_main_menu(self):
        self.cmds.clear()
        self.clear()
        self.menu_desc = ''

        lbl_cmds = "Commands"
        self.add_cmd(lbl_cmds, 'wrap <t>xt files', wrap_txt)
        self.add_cmd(lbl_cmds, '<m>erge ini files', merge_ini)
        self.add_cmd(lbl_cmds, 'update <i>ni files', create_ini)
        self.add_cmd(lbl_cmds, '<q>uit', sys.exit)

        lbl_review = "Review changes"
        if self.res_files.diff_count or options.force:
            self.add_cmd(lbl_review, "<w>rite files", self.res_files.write_files)
        if self.res_files.diff_count:
            if self.show_res:
                self.add_cmd(lbl_review, "<v>iew languages", self.toggle_details)
            else:
                self.add_cmd(lbl_review, "<v>iew resources", self.toggle_details)
            self.add_cmd(lbl_review, "show <d>iff", self.res_files.show_diff)
            self.add_cmd(lbl_review, "<e>dit", self.res_files.edit_files)
            self.add_cmd(lbl_review, "e<x>punge changes", self.res_files.undo_changes)

        lbl_select = "Select"
        self.add_cmd(lbl_select, "<l>anguages", self.set_languages)
        self.add_cmd(lbl_select, "<r>esources", self.set_resources)
        if len(self.res_files.diff_count) > 1:
            self.add_cmd(lbl_select, "chan<g>es", self.set_changes)

        if len(res_index.resources) == 1:
            self.add_cmd(lbl_select, "<n>ext resource", [self.next_index, 'resources'])
        elif len(res_index.languages) == 1:
            self.add_cmd(lbl_select, "<n>ext language", [self.next_index, 'languages'])

        if git:
            lbl_git = "Git"
            if self.res_files.git_count:
                self.add_cmd(lbl_git, "<s>tatus", self.res_files.git_status)
            if self.res_files.git_count['modified'] or self.res_files.git_count['new']:
                self.add_cmd(lbl_git, "<a>dd", self.res_files.git_add)
                self.add_cmd(lbl_git, "select <h>unks", self.res_files.git_add_hunks)
                self.add_cmd(lbl_git, "chec<k>out", self.res_files.git_reset)
            if self.res_files.git_count['staged']:
                self.add_cmd(lbl_git, "<c>ommit", self.git_commit)

        if transifex:
            lbl_tx = "Transifex"
            self.add_cmd(lbl_tx, "<p>ull", ini_files.tx_pull)
            if self.res_files.modified:
                self.add_cmd(lbl_tx, "p<u>sh", self.res_files.tx_push)

        self.build_menu_desc()
        print
        print self.change_summary()
        self.git_summary()

    def build_menu_desc(self):
        for group, labels in self.items():
            self.menu_desc += "%s: %s" % (group, ", ".join(labels)) + "\n"

    def show_menu(self):
        """It reads the command line argument and treat each letter as a command
        When there is no more command, it switches to interactive mode."""
        if not self.cmd:
            self.cmd = raw_input(self.menu_desc).lower()
        choice = self.cmd[:1]
        self.cmd = self.cmd[1:]
        if choice in self.cmds:
            func = self.cmds[choice]
            if isinstance(func, list):
                # If it's a list, then the first item is the function,
                # the other ones are arguments
                func[0](*func[1:])
            else:
                func()
        else:
            print "Huh?"
            self.cmd = ""

    def main_menu(self):
        print res_index,
        while 1:
            self.res_files.refresh_state()
            self.build_main_menu()
            self.show_menu()

wrapper_args = {
    'width' : 79,
    'break_on_hyphens' : False,
    'break_long_words' : False,
    'replace_whitespace' : False}

wrapper = TextWrapper(**wrapper_args)
# Use hardcoded whitespaces instead of \s because the latter matches
# non-breaking spaces (see textwrap.py:30).
wrapper.wordsep_simple_re_uni = re.compile(r'([%s]+)' % _whitespace)
FWwrapper = FullWidthTextWrapper(**wrapper_args)
wrapper_args['no_space'] = True
FW_NS_wrapper = FullWidthTextWrapper(**wrapper_args)

# We initialize the resource index early because we might need it if we have to
# initialize the transifex configuration.
res_index = ResourceIndex()

# Can we use the transifex client?
try:
    call_tx([], True)
    transifex = True
except OSError:
    transifex = False

# Is transifex configured?
if transifex:
    if not os.path.exists(tx_config):
        setup_transifex()

# Can we use git?
try:
    call(['git'], stdout=open(os.devnull, 'wb'))
    git = True
except OSError:
    git = False

# Create the global variables for managing resources.
txt_files = TxtCollection()
ini_files = IniCollection()
menu = Menu(cmd)
menu.main_menu()