#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2009 Zuza Software Foundation
#
# This file is part of translate.
#
# translate is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# translate is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with translate; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import os

from django.utils.translation import ugettext_lazy as _
from django.db                import models
from django.core.exceptions import ObjectDoesNotExist

from translate.filters import checks
from translate.lang.data import langcode_re

from pootle_store.util import absolute_real_path, statssum
from pootle_misc.aggregate import max_column
from pootle_store.models import Unit
from pootle_store.filetypes import filetype_choices, factory_classes, is_monolingual
from pootle_misc.util import getfromcache
from pootle_misc.baseurl import l
from pootle_app.lib.util import RelatedManager

class ProjectManager(RelatedManager):
    def get_by_natural_key(self, code):
        return self.get(code=code)

class Project(models.Model):
    objects = ProjectManager()
    class Meta:
        ordering = ['code']
        db_table = 'pootle_app_project'

    code_help_text = _('A short code for the project. This should only contain ASCII characters, numbers, and the underscore (_) character.')
    description_help_text = _('A description of this project. This is useful to give more information or instructions. This field should be valid HTML.')

    checker_choices = [('standard', 'standard')]
    checkers = list(checks.projectcheckers.keys())
    checkers.sort()
    checker_choices.extend([(checker, checker) for checker in checkers])
    local_choices = filetype_choices
    treestyle_choices = (
            # TODO: check that the None is stored and handled correctly
            ('auto', _('Automatic detection (slower)')),
            ('gnu', _('GNU style: files named by language code')),
            ('nongnu', _('Non-GNU: Each language in its own directory')),
    )

    code           = models.CharField(max_length=255, null=False, unique=True, db_index=True, verbose_name=_('Code'), help_text=code_help_text)
    fullname       = models.CharField(max_length=255, null=False, verbose_name=_("Full Name"))
    description    = models.TextField(blank=True, help_text=description_help_text)
    checkstyle     = models.CharField(max_length=50, default='standard', null=False, choices=checker_choices, verbose_name=_('Quality Checks'))
    localfiletype  = models.CharField(max_length=50, default="po", choices=local_choices, verbose_name=_('File Type'))
    treestyle      = models.CharField(max_length=20, default='auto', choices=treestyle_choices, verbose_name=_('Project Tree Style'))
    source_language  = models.ForeignKey('pootle_language.Language', db_index=True, verbose_name=_('Source Language'))
    ignoredfiles   = models.CharField(max_length=255, blank=True, null=False, default="", verbose_name=_('Ignore Files'))
    directory = models.OneToOneField('pootle_app.Directory', db_index=True, editable=False)

    def natural_key(self):
        return (self.code,)
    natural_key.dependencies = ['pootle_app.Directory']

    def __unicode__(self):
        return self.fullname

    def save(self, *args, **kwargs):
        # create file system directory if needed
        project_path = self.get_real_path()
        if not os.path.exists(project_path):
            os.makedirs(project_path)
        from pootle_app.models.directory import Directory
        self.directory = Directory.objects.projects.get_or_make_subdir(self.code)

        super(Project, self).save(*args, **kwargs)

    def delete(self, *args, **kwargs):
        directory = self.directory
        super(Project, self).delete(*args, **kwargs)
        directory.delete()

    @getfromcache
    def get_mtime(self):
        return max_column(Unit.objects.filter(store__translation_project__project=self), 'mtime', None)

    @getfromcache
    def getquickstats(self):
        return statssum(self.translationproject_set.iterator())

    def translated_percentage(self):
        return int(100.0 * self.getquickstats()['translatedsourcewords'] / max(self.getquickstats()['totalsourcewords'], 1))

    def _get_pootle_path(self):
        return "/projects/" + self.code + "/"
    pootle_path = property(_get_pootle_path)

    def get_real_path(self):
        return absolute_real_path(self.code)

    def get_absolute_url(self):
        return l(self.pootle_path)

    def get_template_filtetype(self):
        if self.localfiletype == 'po':
            return 'pot'
        else:
            return self.localfiletype

    def get_file_class(self):
        """returns the TranslationStore subclass required for parsing Project files"""
        return factory_classes[self.localfiletype]

    def is_monolingual(self):
        """is this a monolingual project"""
        return is_monolingual(self.get_file_class())

    def file_belongs_to_project(self, filename, match_templates=True):
        """tests if filename matches project filetype (ie. extension),
        if match_templates is true will also check if file matches
        template filetype"""

        return filename.endswith(os.path.extsep + self.localfiletype) or \
               match_templates and filename.endswith(os.path.extsep + self.get_template_filtetype())

    def _detect_treestyle(self):
        try:
            dirlisting = os.walk(self.get_real_path())
            dirpath, dirnames, filenames = dirlisting.next()

            if not dirnames:
                # no subdirectories
                if filter(self.file_belongs_to_project, filenames):
                    # translation files found, assume gnu
                    return "gnu"
            else:
                # there are subdirectories
                if filter(lambda dirname: dirname == 'templates' or langcode_re.match(dirname), dirnames):
                    # found language dirs assume nongnu
                    return "nongnu"
                else:
                    # no language subdirs found, look for any translation file
                    for dirpath, dirnames, filenames in os.walk(self.get_real_path()):
                        if filter(self.file_belongs_to_project, filenames):
                            return "gnu"
        except:
            pass
        # unsure
        return None

    def get_treestyle(self):
        """returns the real treestyle, if treestyle is set to auto it
        checks the project directory and tries to guess if it is gnu
        style or nongnu style.

        we are biased towards nongnu because it makes managing project
        from the web easier"""
        if self.treestyle != "auto":
            return self.treestyle
        else:
            detected = self._detect_treestyle()
            if detected is not None:
                return detected

        # when unsure return nongnu
        return "nongnu"

    def get_template_translationproject(self):
        try:
            return self.translationproject_set.get(language__code='templates')
        except ObjectDoesNotExist:
            try:
                return self.translationproject_set.get(language=self.source_language_id)
            except ObjectDoesNotExist:
                pass