#!/usr/bin/env python

# Code in this file has been taken from Sugar (activity.bundlebuilder POT generation code) 
# and Damned Lies (POT diff code)

import os, os.path
import sys
import re
import subprocess
import shutil
from ConfigParser import ConfigParser
from os.path import join, exists, basename, lexists, islink, dirname

USE_DIFFLIB = 0

class _SvnFileList(list):
    def __init__(self):
        f = os.popen('svn list -R')
        for line in f.readlines():
            filename = line.strip()
            if os.path.isfile(filename):
                self.append(filename)
        f.close()

class _GitFileList(list):
    def __init__(self):
        f = os.popen('git ls-files')
        for line in f.readlines():
            filename = line.strip()
            if not filename.startswith('.'):
                self.append(filename)
        f.close()

class _DefaultFileList(list):
    def __init__(self):
        for name in os.listdir('activity'):
            if name.endswith('.svg'):
                self.append(os.path.join('activity', name))

        self.append('activity/activity.info')

        if os.path.isfile(_get_source_path('NEWS')):
            self.append('NEWS')

def _get_file_list(manifest):
    if os.path.isdir('.git'):
        return _GitFileList()
    elif os.path.isdir('.svn'):
        return _SvnFileList()
    else:
        return _DefaultFileList()

def _get_source_path(path=None):
    if path:
        return os.path.join(os.getcwd(), path)
    else:
        return os.getcwd()

def diff(pota, potb, only_additions = 0):
    """Returns a list of differing lines between two files."""
    f1 = open(pota, "r")
    data1 = f1.read()
    res1 = _parse_contents(data1)
    res1.sort()

    f2 = open(potb, "r")
    data2 = f2.read()
    res2 = _parse_contents(data2)
    res2.sort()

    if not USE_DIFFLIB:
        # since we are working with sorted data, we can speed up the process by doing compares ourselves
        # instead of using difflib stuff
        i, j = 0, 0
        result = []
        while i < len(res1) and j < len(res2):
            if res1[i] == res2[j]:
                i+=1; j+=1
            elif res1[i] < res2[j]:
                if not only_additions:
                    result.append("- " + res1[i])
                i+=1
            elif res1[i] > res2[j]:
                result.append("+ " + res2[j])
                j+=1
        #print "\n".join(result)
        return result
    else:
        import difflib
        d = difflib.Differ()
        result = list(d.compare(res1, res2))

        onlydiffs = []
        for line in result:
            if line[0]!=" ":
                onlydiffs.append(line)
                #print line
        return onlydiffs


def _parse_contents(contents):
    """Parse PO file data, returning a list of msgid's.

    It also supports msgctxt (GNU gettext 0.15) and plural forms,
    the returning format of each entry is:

         [msgctxt::]msgid[/msgid_plural]"""

    if contents[-1] != "\n": contents += "\n"

    # state machine for parsing PO files
    msgid = ""; msgstr = ""; msgctxt = ""; comment = ""; plural = "";
    in_msgid = in_msgstr = in_msgctxt = in_msgid_plural = in_plural = 0

    result = []
    enc = "UTF-8"

    lines = contents.split("\n")
    lines.append("\n")
    for line in lines:
        line = line.strip()

        if line == "":
            if in_msgstr and msgid != "":
                onemsg = ""

                if msgctxt: onemsg += ('"' + msgctxt + '"::')
                onemsg += ('"' + msgid + '"')
                if plural: onemsg += ('/"' + plural + '"')

                result.append(onemsg)

            elif in_msgstr and msgid == "":
                # Ignore PO header
                pass

            msgid = ""; msgstr = ""; msgctxt = ""
            in_msgid = 0; in_msgstr = 0; in_msgctxt = 0
            flags = []; sources = []; othercomments = {}
            plural = ""; plurals = []; in_msgid_plural = 0; in_plural = 0

        elif line[0] == "\"" and line[-1] == "\"":
            if in_msgid:
                if in_msgid_plural:
                    plural += line[1:-1]
                else:
                    msgid += line[1:-1]
            elif in_msgctxt:
                msgctxt += line[1:-1]
            elif in_msgstr:
                pass
            else:
                raise Exception()

        elif line[0] == "#":
            # Ignore any comments, flags, etc.
            continue

        elif line[:12] == "msgid_plural" and in_msgid:
            in_msgid_plural = 1
            plural = line[13:].strip()[1:-1]
        elif line[:5] == "msgid" and not in_msgid:
            in_msgctxt = 0
            in_msgid = 1
            msgid = line[6:].strip()[1:-1]
        elif line[:7] == "msgctxt" and not in_msgid:
            in_msgctxt = 1
            msgctxt = line[8:].strip()[1:-1]
        elif line[:7] == "msgstr[" and in_msgid_plural:
            in_msgstr = 1
            in_msgid = 0
            in_msgctxt = 0
        elif line[:6] == "msgstr" and in_msgid:
            in_msgstr = 1
            in_msgid = 0
            in_msgctxt = 0
        else:
            pass
    return result

class PotFile:
    def __init__(self, location, project, vcs, method, layout, ignore_files,
            translation_dir):
        self.location = location
        self.project = project
        self.vcs = vcs
        self.method = method
        self.layout = layout
        self.ignore_files = ignore_files
        self.translation_dir = translation_dir

    def update(self):
        print '\n\n\n ####### Checking POT for ' + self.project + ' ######\n\n\n'
        # Make sure that stdout won't be messy
        sys.stdout.flush()
        # First we get the latest code from versioncontrol
        podir = os.path.dirname(self.location)
        os.chdir(podir)
        if self.vcs == 'git':
            args = ['git', 'pull']
            ret = subprocess.call(args)
            #if ret > 0:
            #    # use the 'ours' merge driver -- in case of conflicts
            #    # the pootle version takes precedence
            #    #
            #    # XXX and otherwrite all non-po/ differences to make activity develoopers really happy..
            #    #
            #    args = ['git', 'pull', '-s', 'ours']
            #    subprocess.call(args)

        elif self.vcs.startswith('http'):
            args = ['wget', '--no-check-certificate', '-O', 'new.pot', self.vcs]
            subprocess.call(args)

        if self.method == 'bundlebuilder':
            podir = os.path.dirname(self.location)
            projdir = os.path.dirname(podir) # For GNU Style layouts only
            os.chdir(projdir)

            manifest = os.path.join(projdir, 'MANIFEST')

            python_files = []
            file_list = _get_file_list(manifest)
            for file_name in file_list:
                if os.path.exists(file_name) and file_name.endswith('.py') and file_name not in self.ignore_files:
                    python_files.append(file_name)

            activity_info = ConfigParser()
            activity_info.read(join(_get_source_path(), 'activity', 'activity.info'))

            # First write out a stub .pot file containing just the translated
            # activity name, then have xgettext merge the rest of the
            # translations into that. (We can't just append the activity name
            # to the end of the .pot file afterwards, because that might
            # create a duplicate msgid.)
            new_pot_file = os.path.join(projdir, 'po', 'new.pot')
            with file(new_pot_file, 'w') as f:
                option_value = self.project
                for option_name in ('name', 'summary', 'description'):
                    if activity_info.has_option('Activity', option_name):
                        option_value = activity_info.get('Activity', option_name)
                    escaped_value = re.sub('([\\\\"])', '\\\\\\1', option_value.replace('\n', ' '))
                    f.write('#. TRANS: "%s" option from activity.info file\n' % option_name)
                    f.write('msgid "%s"\n' % escaped_value)
                    f.write('msgstr ""\n')

            args = [ 'xgettext', '--join-existing', '--language=Python',
                     '--keyword=_', '--add-comments=TRANS:', '--output=%s' % new_pot_file ]

            args += python_files
            retcode = subprocess.call(args)
            if retcode:
                print 'ERROR - xgettext failed with return code %i.' % retcode

        elif self.method == 'intltool':
            podir = os.path.dirname(self.location)
            os.chdir(podir)

            args = ['intltool-update', '--pot', '--gettext-package=new']
            retcode = subprocess.call(args)
            if retcode:
                print 'ERROR - intltool failed with return code %i.' % retcode

        elif self.method == 'sweets':
            podir = os.path.dirname(self.location)
            args = ['sweets', 'genpot', podir]
            retcode = subprocess.call(args)
            if retcode:
                print 'ERROR - sweets failed with return code %i.' % retcode

        # Now we do a diff
        podir = os.path.dirname(self.location)
        new_pot_file = os.path.join(podir, 'new.pot')
        if exists(new_pot_file):
            if not exists(self.location):
                print ('\n\n ***** Create POT for ' + self.project +  '*****\n\n\n')
                shutil.move(new_pot_file, self.location)
            elif len(diff(self.location, new_pot_file)):
                print ('\n\n ***** Updating POT for ' + self.project +  '*****\n\n\n')
                shutil.move(new_pot_file, self.location)
            else:
                os.unlink(new_pot_file)

        filename = self.location.split(os.sep)[-3]
        project = self.location.split(os.sep)[-4]
        pot_path = join(self.translation_dir, project, 'templates',
                filename + '.pot')
        if not lexists(pot_path) or not islink(pot_path) or \
                os.readlink(pot_path) != self.location:
            if lexists(pot_path):
                print '-- Remove bad template symlink', pot_path
                os.unlink(pot_path)
            print '-- Create new template symlink', pot_path, self.location
            os.symlink(self.location, pot_path)

        for lang in os.listdir(join(self.translation_dir, project)):
            if lang == 'templates':
                continue
            po_path = join(self.translation_dir, project, lang,
                    filename + '.po')
            if not exists(po_path):
                src_po_path = join(dirname(self.location), lang + '.po')
                if exists(src_po_path):
                    print '-- Create missed .po link for', lang
                    os.symlink(src_po_path, po_path)

        # Make sure that stdout won't be messy
        sys.stdout.flush()

def parse_config(location, translation_dir):
    cfg = ConfigParser()
    cfg.read(location)
    for section in cfg.sections():
        ignore_files = []
        if cfg.has_option(section, 'ignore-files'):
            ignore_files = [i.strip() for i in cfg.get(section, 'ignore-files').split(';')]
        p = PotFile(section, cfg.get(section, 'project'), cfg.get(section, 'vcs'),
                cfg.get(section, 'method'), cfg.get(section, 'layout'),
                ignore_files, translation_dir)
        p.update()

if __name__ == '__main__':
    if len(sys.argv) != 3:
        print 'Usage: %s <.ini> <translation-dir>' % sys.argv[0]
        exit(1)
    parse_config (sys.argv[1], sys.argv[2])