SGJP / Kuznia

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

from django.db.models import *
from django.contrib.auth.models import User, Permission
from common.util import no_history
from accounts.util import users_with_perm

class NotDeletedManager(Manager):
  use_for_related_field = True

  def get_query_set(self):
    return super(NotDeletedManager, self).get_query_set().filter(deleted=False)

class LexemeNotDeletedManager(Manager):
  use_for_related_field = True

  def get_query_set(self):
    return super(
      LexemeNotDeletedManager, self).get_query_set().filter(
        lexeme__deleted=False)


class LexicalClass(Model):
  symbol = CharField(primary_key=True, max_length=16, db_column='czm')

  def __unicode__(self):
    return self.symbol

  class Meta:
    db_table = 'czescimowy'


class PartOfSpeech(Model):
  symbol = CharField(primary_key=True, max_length=16, db_column='pos')
  lexical_class = ForeignKey(LexicalClass, db_column='czm')
  full_name = CharField(max_length=128, db_column='nazwa')
  index = IntegerField()
  color_scheme = IntegerField()

  def __unicode__(self):
    return self.symbol

  class Meta:
    db_table = 'klasygramatyczne'
    ordering = ['index']


class QualifierExclusionClass(Model):
  name = CharField(
    unique=True, max_length=64, db_column='nazwa', verbose_name=u'nazwa')
  vocabulary = ForeignKey(
    'Vocabulary', db_column='slownik', verbose_name=u'słownik')

  def __unicode__(self):
    return self.name

  class Meta:
    db_table = 'klasy_wykluczania'

def get_exclusion_classes():
  exclusion_classes = {}
  for ec in QualifierExclusionClass.objects.all():
    qualifiers = ec.qualifier_set.all()
    if qualifiers:
      q_list = [q.pk for q in qualifiers]
      exclusion_classes[ec.pk] = q_list
  return exclusion_classes


# kwalifikatory dla leksemów, odmian,
# zakonczen i form wyjatkowych
class Qualifier(Model):
  label = CharField(max_length=64, db_column='kwal', verbose_name=u'nazwa')
  vocabulary = ForeignKey(
    'Vocabulary', db_column='slownik', verbose_name=u'słownik',
    related_name='qualifiers')
  exclusion_class = ForeignKey(
    QualifierExclusionClass, db_column='klasa', null=True, blank=True,
    verbose_name=u'klasa wykluczania')
  deleted = BooleanField(db_column='usuniety', default=False)

  objects = NotDeletedManager()
  all_objects = Manager()

  def is_empty(self):
    return not (
      self.lexeme_set.exists() or
      self.ending_set.exists() or
      self.lexemeinflectionpattern_set.exists())

  def set_for(self, something, add):
    if add:
      if self.exclusion_class:
        qualifiers = (something.qualifiers.all() &
                      self.exclusion_class.qualifier_set.all())
        if qualifiers.count() > 0 and list(qualifiers) != [self]:
          return
      something.qualifiers.add(self) #add
    else:
      something.qualifiers.remove(self) #add

  def __unicode__(self):
    #return u'%s (%s)' % (self.label, self.vocabulary.id)
    return self.label

  class Meta:
    unique_together = ('label', 'vocabulary')
    db_table = 'kwalifikatory'
    ordering = ['label']

def visible_qualifiers(user):
  return Qualifier.objects.filter(vocabulary__in=visible_vocabularies(user))

def editable_qualifiers(user):
  return Qualifier.objects.filter(vocabulary__in=editable_vocabularies(user))


class Classification(Model):
  name = CharField(
    unique=True, max_length=64, db_column='nazwa',
    verbose_name=u'nazwa klasyfikacji')
  parts_of_speech = ManyToManyField(PartOfSpeech)

  def value_tree(self):
    parts = []
    for v in self.values.filter(parent_node__isnull=True):
      parts.append(v.subtree())
    return parts

  def make_choices(self):
    return make_choices(self.value_tree())

  def __unicode__(self):
    return self.name

  class Meta:
    db_table = 'klasyfikacje'

def make_choices(tree):
  choices = []
  for value, subtree in tree:
    choices.append((value.pk, value.label))
    subchoices = make_choices(subtree)
    choices += [(pk, u'    ' + label) for (pk, label) in subchoices] #  
  return choices


class ClassificationValue(Model):
  label = CharField(
    unique=True, max_length=64, db_column='nazwa',
    verbose_name=u'nazwa wartości')
  classification = ForeignKey(Classification, db_column='klas_id',
                              related_name='values')
  parent_node = ForeignKey(
    'self', db_column='rodzic', null=True, blank=True,
    verbose_name=u'rodzic wartości', related_name='child_nodes')
  lexemes = ManyToManyField('Lexeme', blank=True, through='LexemeCV')
  deleted = BooleanField(db_column='usunieta', default=False)

  objects = NotDeletedManager()
  all_objects = Manager()

  def subtree(self):
    subtrees = []
    for child in self.child_nodes.all():
      subtrees.append(child.subtree())
    return self, subtrees

  def is_empty(self):
    return not self.lexemes.exists()

  def add_lexeme(self, lexeme):
    LexemeCV.objects.get_or_create(lexeme=lexeme, classification_value=self)

  def remove_lexeme(self, lexeme):
    LexemeCV.objects.filter(lexeme=lexeme, classification_value=self).delete()

  def __unicode__(self):
    return self.label

  class Meta:
    db_table = 'wartosci_klasyfikacji'

class LexemeCV(Model):
  lexeme = ForeignKey('Lexeme')
  classification_value = ForeignKey('ClassificationValue')

  class Meta:
    unique_together = ['lexeme', 'classification_value']


class BaseFormLabel(Model):
  symbol = CharField(max_length=32, blank=True, db_column='efobaz')

  def __unicode__(self):
    return self.symbol

  class Meta:
    db_table = 'efobazy'


class InflectionCharacteristic(Model):
  symbol = CharField(max_length=16, blank=True, db_column='charfl')
  part_of_speech = ForeignKey(PartOfSpeech, db_column='pos')
  basic_form_label = ForeignKey(BaseFormLabel, db_column='efobaz')

  def __unicode__(self):
    return '%s:%s' % (self.symbol, self.part_of_speech.symbol)

  class Meta:
    db_table = 'charfle'
    unique_together = ('symbol', 'part_of_speech')


class PatternType(Model):
  lexical_class = ForeignKey(
    LexicalClass, db_column='czm', verbose_name=u'cz. mowy')
  # typ wzoru (np. dla rzeczowników:
  # odmiana męska, żeńska lub nijaka)
  symbol = CharField(
    max_length=32, blank=True, db_column='wtyp', verbose_name=u'typ wzoru')

  def base_form_labels(self):
    bfl_pks = set(self.tabletemplate_set.distinct()
                      .values_list('cell__base_form_label', flat=True))
    # prowizorka ze względu na wzór 0000
    bfl_pks |= set(self.pattern_set.distinct()
                       .values_list('endings__base_form_label', flat=True))
    return BaseFormLabel.objects.filter(pk__in=bfl_pks)

  def __unicode__(self):
    return '%s (%s)' % (self.symbol, self.lexical_class.symbol)

  class Meta:
    db_table = 'typywzorow'


class Pattern(Model):
  PATTERN_STATUS_CHOICES = (
    # (<symbol>, u'<opis>'),
  )

  # kiedyś trzeba zrobić porządek w nazwach.
  name = CharField(
    max_length=32, unique=True, db_column='w_id', verbose_name=u'nazwa')
  type = ForeignKey(PatternType, db_column='typ')
  # rdzeń przykładowej formy hasłowej
  example = CharField(max_length=64, db_column='przyklad',
                      verbose_name=u'przyklad')
  # zakończenie formy podstawowej (uwaga: w zasadzie tylko dla prezentacji
  # wzoru, rdzenie w Odmieniasie trzeba tworzyć uważniej, wiedząc, która forma
  # jest hasłowa dla danego charfla)
  basic_form_ending = CharField(
    max_length=32, db_column='zakp', blank=True,
    verbose_name=u'zakończenie formy podstawowej')
  # np. "chwilowo nieużywany, ale trzymamy, bo wymyśliliśmy"
  status = CharField(
    max_length=8, choices=PATTERN_STATUS_CHOICES, verbose_name=u'status')
  comment = TextField(blank=True, db_column='komentarz',
                      verbose_name=u'komentarz')

  def ending_set(self, subroot='', tag_prefix=None):
    endings = self.endings
    if tag_prefix:
      endings = endings.filter(base_form_label__symbol__startswith=tag_prefix)
    return set(subroot + e for e in
               endings.values_list('string', flat=True))

  def get_basic_form_ending(self, inflection_characteristic):
    return self.endings.filter(
      base_form_label=inflection_characteristic.basic_form_label)[0].string

  def __unicode__(self):
    return self.name

  class Meta:
    db_table = 'wzory'
    ordering = ['name']
    permissions = (
      ('view_pattern', u'Może oglądać wzory'),
    )


def prepare_table(table):
  for row in table:
    for cell in row:
      if type(cell) == dict and 'forms' in cell:
        cell['forms'].sort()
        seen_forms = []
        unique_forms = []
        for form in cell['forms']:
          if form[1] not in seen_forms:
            seen_forms.append(form[1])
            unique_forms.append(form)
        cell['forms'] = [{'form': form, 'qualifiers': qualifiers}
                         for (key, form, qualifiers) in unique_forms]
      elif type(cell) == dict and 'label' in cell:
        seen_labels = []
        def new(label):
          new = label not in seen_labels
          seen_labels.append(label)
          return new
        cell['label'] = filter(new, cell['label'])


# zakonczenie formy bazowej
class Ending(Model):
  pattern = ForeignKey(Pattern, related_name='endings', db_column='w_id')
  # etykieta (tag) formy bazowej
  base_form_label = ForeignKey(BaseFormLabel, db_column='efobaz')
  # kolejnosc dla zakonczen o tym samym base_form_label
  index = IntegerField(db_column='zind')
  string = CharField(max_length=16, db_column='zak', blank=True)
  qualifiers = ManyToManyField(
    Qualifier, blank=True, db_table='kwalifikatory_zakonczen')

  def editable_vocabularies(self, user):
    return editable_vocabularies(user)

  def __unicode__(self):
    return '%s : %s : %s' % (
      self.pattern.name, self.string, self.base_form_label)

  class Meta:
    db_table = 'zakonczenia'
    unique_together = ('pattern', 'base_form_label', 'index')
    ordering = ['index']


class Lexeme(Model):
  STATUS_CHOICES = (
    ('cand', u'kandydat'),
    ('desc', u'wprowadzony'),
    ('conf', u'zatwierdzony'),
  )

  entry = CharField(max_length=64, db_column='haslo', db_index=True,
                    verbose_name=u'hasło', blank=True) # dla nowo utworzonych
  # pozostałość historyczna:
  entry_suffix = CharField(blank=True, max_length=16, db_column='haslosuf',
                           verbose_name=u'sufiks hasła')
  gloss = TextField(blank=True, db_column='glosa', verbose_name=u'glosa')
  note = TextField(blank=True, db_column='nota', verbose_name=u'nota')
  pronunciation = TextField(
    blank=True, db_column='wymowa', verbose_name=u'wymowa')
  valence = TextField(blank=True, verbose_name=u'łączliwość')
  homonym_number = IntegerField(db_column='hom', default=1)
  part_of_speech = ForeignKey(
    PartOfSpeech, db_column='pos', verbose_name=u'cz. mowy')
  owner_vocabulary = ForeignKey(
    'Vocabulary', db_column='slownik', related_name='owned_lexemes')
  source = CharField(max_length=32, blank=True, db_column='zrodlo')
  status = CharField(max_length=8, db_column='status', choices=STATUS_CHOICES)
  qualifiers = ManyToManyField(
    Qualifier, blank=True, db_table='kwalifikatory_leksemow')
  comment = TextField(blank=True, db_column='komentarz',
                      verbose_name=u'komentarz')
  last_modified = DateTimeField(auto_now=True, db_column='data_modyfikacji')
  # osoba, ktora ostatnia zmieniala opis leksemu
  responsible = ForeignKey(
    User, blank=True, null=True, db_column='odpowiedzialny')
  patterns = ManyToManyField(Pattern, through='LexemeInflectionPattern')
  deleted = BooleanField(db_column='usuniety', default=False)

  objects = NotDeletedManager()
  all_objects = Manager()

  def inflection_tables(self, variant, qualifiers=None):
    lips = self.lexemeinflectionpattern_set.order_by('index')
    ics = []
    for lip in lips:
      ic = lip.inflection_characteristic
      if ic not in ics:
        ics.append(ic)
    return [(ic, self.inflection_table(variant, ic, qualifiers=qualifiers))
            for ic in ics]

  def inflection_table(self, variant, inflection_characteristic,
                       qualifiers=None):
    lips = self.lexemeinflectionpattern_set.filter(
      inflection_characteristic=inflection_characteristic)
    tables = [lip.inflection_table(variant, qualifiers=qualifiers)
              for lip in lips]
    table1 = tables[0]
    for table2 in tables[1:]:
      for row1, row2 in zip(table1, table2):
        for cell1, cell2 in zip(row1, row2):
          if cell1['type'] == 'forms':
            assert cell2['type'] in ('forms', 'empty')
            if cell2['type'] == 'forms':
              cell1['forms'].extend(cell2['forms'])
          elif cell1['type'] == 'label':
            assert cell2['type'] in ('label', 'empty')
            if cell2['type'] == 'label':
              cell1['label'].extend(cell2['label'])
          elif cell1['type'] == 'empty':
            cell1.update(cell2)
    prepare_table(table1)
    return table1

  def refresh_forms(self):
    self.lexemeform_set.all().delete()
    for form in self.all_forms():
      self.lexemeform_set.add(LexemeForm(form=form))

  def all_forms(self, affixes=True, label_filter=None, variant='1'):
    forms = set()
    for lip in self.lexemeinflectionpattern_set.all():
      forms |= set(
        form for (indexes, form, qualifiers)
        in lip.all_forms(
          affixes=affixes, label_filter=label_filter, variant=variant))
    return forms

  def get_root(self, pattern, inflection_characteristic):
    basic_form = self.entry
    pos = self.part_of_speech.symbol
    return get_root(basic_form, pos, pattern, inflection_characteristic)

  def visible_vocabularies(self, user):
    return visible_vocabularies(user) & self.vocabularies.all()

  def editable_vocabularies(self, user):
    return editable_vocabularies(user) & self.vocabularies.all()

  def change_owner(self, new_owner):
    old_owner = self.owner_vocabulary
    new_owner.add_lexeme(self)
    self.owner_vocabulary = new_owner
    old_owner.remove_lexeme(self)

  def classification_values(self, classification):
    return self.classificationvalue_set.filter(classification=classification)

  def lip_data(self):
    lips = self.lexemeinflectionpattern_set.all()
    patterns = []
    ics = []
    for lip in lips:
      if patterns == [] or lip.pattern.name != patterns[-1]:
        patterns.append(lip.pattern.name)
      if ics == [] or lip.inflection_characteristic.symbol != ics[-1]:
        ics.append(lip.inflection_characteristic.symbol)
    patterns = '/'.join(patterns)
    ics = '/'.join(ics)
    return {'patterns': patterns, 'inflection_characteristics': ics}

  def fix_homonym_number(self):
    homonym_numbers = (Lexeme.objects.filter(
      entry=self.entry, part_of_speech=self.part_of_speech)
      .exclude(pk=self.pk)).values_list('homonym_number', flat=True)
    for i in range(1, len(homonym_numbers) + 2):
      if i not in homonym_numbers:
        self.homonym_number = i
        break

  def attributes(self, part_of_speech=None, ics=None):
    if ics is None:
      lips = self.lexemeinflectionpattern_set.all()
      ics = tuple(lip.inflection_characteristic for lip in lips)
    pos = part_of_speech or self.part_of_speech
    attrs = LexemeAttribute.objects.all()
    attrs = attrs.filter(parts_of_speech=pos)
    attrs = (attrs.filter(inflection_characteristics__in=ics)
             | attrs.filter(takes_ic=False))
    return attrs

  def attributes_values(self, part_of_speech=None, ics=None):
    for attr in self.attributes(part_of_speech, ics):
      if attr.multiple:
        v = attr.values.filter(lexemes=self)
      else:
        try:
          v = attr.values.get(lexemes=self)
        except LexemeAttributeValue.DoesNotExist:
          v = None
      yield (attr, v)

  def perm(self, user, action):
    if action == 'view':
      vocabs = self.vocabularies.all()
      return bool(vocabs & visible_vocabularies(user))
    elif action == 'change':
      priority = (not (self.responsible and
                       self.responsible.has_perm('dictionary.lexeme_priority'))
                  or user.has_perm('dictionary.lexeme_priority'))
      edit_vocab = self.owner_vocabulary in editable_vocabularies(user)
      return edit_vocab and priority

  def undelete(self):
    no_history()
    self.deleted = False
    self.save()
    self.history_set.get(column_name='usuniety').delete()

  def __unicode__(self):
    return '%s (%s)' % (self.entry, self.part_of_speech.symbol)

  class Meta:
    db_table = 'leksemy'
    permissions = (
      ('view_lexeme', u'Może oglądać leksemy'),
      ('view_all_lexemes', u'Może oglądać wszystkie leksemy'),
      ('lexeme_priority', u'Ważniejszy głos przy modyfikowaniu leksemów'),
      ('export_lexemes', u'Może eksportować leksemy'),
    )

def filter_visible(lexemes, user):
  vocab_ids = [v.id for v in visible_vocabularies(user)]
  # uniknięcie podzapytania *bardzo* zwiększa wydajność!
  return lexemes.filter(vocabularies__id__in=vocab_ids).distinct()

def get_root(basic_form, pos, pattern, ic, use_pattern_ending=False):
  bfl = ic.basic_form_label
  basic_endings = pattern.endings.filter(base_form_label=bfl)
  ends = []
  if use_pattern_ending:
    ends.append(pattern.basic_form_ending)
  if basic_endings:
    ends += [e.string for e in pattern.endings.filter(base_form_label=bfl)]
  if pos == 'ger':
    ends = [end + 'ie' for end in ends]
  if pos == 'pact':
    ends = [end + 'cy' for end in ends]
  if pos in ('ppas', 'appas'):
    ends = [end + 'y' for end in ends]
  good_ends = [end for end in ends if basic_form.endswith(end)]
  assert len(set(good_ends)) <= 1 # inaczej rdzeń nie jest jednoznaczny
  if good_ends:
    return basic_form[:len(basic_form) - len(good_ends[0])]
  else:
    if not use_pattern_ending:
      return get_root(basic_form, pos, pattern, ic, use_pattern_ending=True)
    else:
      return None


class LexemeAttribute(Model):
  name = CharField(max_length=32)
  closed = BooleanField() # czy jest zamknięta lista wartości
  multiple = BooleanField()
  required = BooleanField()
  parts_of_speech = ManyToManyField(PartOfSpeech)
  takes_ic = BooleanField()
  inflection_characteristics = ManyToManyField(
    InflectionCharacteristic, blank=True)

  def __unicode__(self):
    return self.name


class LexemeAttributeValue(Model):
  value = CharField(max_length=32)
  attribute = ForeignKey(LexemeAttribute, related_name='values')
  lexemes = ManyToManyField(Lexeme, blank=True, through='LexemeAV')

  def add_lexeme(self, lexeme):
    LexemeAV.objects.get_or_create(lexeme=lexeme, attribute_value=self)

  def remove_lexeme(self, lexeme):
    LexemeAV.objects.filter(lexeme=lexeme, attribute_value=self).delete()

  def __unicode__(self):
    return self.value

  class Meta:
    ordering = ['value']

class LexemeAV(Model):
  lexeme = ForeignKey('Lexeme')
  attribute_value = ForeignKey('LexemeAttributeValue')

  class Meta:
    unique_together = ['lexeme', 'attribute_value']


class LexemeInflectionPattern(Model):
  lexeme = ForeignKey(Lexeme, db_column='l_id')
  index = IntegerField(db_column='oind')
  pattern = ForeignKey(Pattern, db_column='w_id', verbose_name=u'wzór')
  # charakterystyka fleksyjna (rodzaj, aspekt)
  inflection_characteristic = ForeignKey(
    InflectionCharacteristic, db_column='charfl', verbose_name=u'char. fleks.')
  # rdzen odmiany przy zastosowaniu danego wzoru
  root = CharField(max_length=64, db_column='rdzen')
  # tu mozna sygnalizowac, ze dany sposob
  # odmiany leksemu jest gorszy, przestarzaly, etc
  qualifiers = ManyToManyField(
    Qualifier, blank=True, db_table='kwalifikatory_odmieniasiow')

  objects = LexemeNotDeletedManager()
  all_objects = Manager()

  def table_template(self, variant):
    return TableTemplate.objects.get(
      variant=variant, pattern_type=self.pattern.type,
      inflection_characteristic=self.inflection_characteristic)

  def cells(self, variant='1'):
    tt = self.table_template(variant)
    return tt.cell_set.all()

  def inflection_table(self, variant, separated=False, qualifiers=None,
                       edit_view=False):
    tt = self.table_template(variant)
    cells = tt.cell_set.all()
    headers = tt.tableheader_set.all()
    rows = set()
    last_col = 0
    cells = [cell for cell in cells if self.forms(cell)]
    for cell in cells:
      rows.add(cell.tablecell.row)
      col = cell.tablecell.col + cell.tablecell.colspan - 1
      if col > last_col:
        last_col = col
    for header in headers:
      rows.add(header.row)
      col = header.col + header.colspan - 1
      if col > last_col:
        last_col = col
    table = [[{'type': 'empty'}
              for i in range(last_col)] for j in range(len(rows))]
    rows = sorted(rows)
    # słownik: nr rzędu w bazie -> rzeczywisty numer rzędu
    row_translate = dict(zip(rows, range(len(rows))))
    for cell in cells:
      x = cell.tablecell.col - 1
      y = row_translate[cell.tablecell.row]
      assert table[y][x]['type'] != 'span'
      separator = u'·' if separated else u''
      forms = self.forms(cell, separator=separator, qualifiers=qualifiers,
                         edit_view=edit_view)
      if table[y][x]['type'] == 'empty':
        table[y][x] = {
          'type': 'forms',
          'forms': forms,
          'rowspan': cell.tablecell.rowspan,
          'colspan': cell.tablecell.colspan,
        }
        for i in range(cell.tablecell.colspan):
          for j in range(cell.tablecell.rowspan):
            if (i, j) != (0, 0):
              assert table[y+j][x+i]['type'] == 'empty'
              table[y+j][x+i]['type'] = 'span'
      else:
        assert cell.tablecell.rowspan == table[y][x]['rowspan']
        assert cell.tablecell.colspan == table[y][x]['colspan']
        table[y][x]['forms'] += forms
    for header in headers:
      x = header.col - 1
      y = row_translate[header.row]
      assert table[y][x]['type'] == 'empty'
      table[y][x] = {
        'type': 'label',
        'label': [header.label],
        'css_class': header.css_class,
        'rowspan': header.rowspan,
        'colspan': header.colspan,
      }
      for i in range(header.colspan):
        for j in range(header.rowspan):
          if (i, j) != (0, 0):
            assert table[y+j][x+i]['type'] == 'empty'
            table[y+j][x+i]['type'] = 'span'
    return table

  def all_forms(self, separator='', affixes=True, label_filter=None,
                variant='1', qualifiers=None):
    forms = []
    for cell in self.cells(variant=variant):
      forms += self.forms(
        cell, separator, affixes, label_filter=label_filter,
        qualifiers=qualifiers)
    return forms

  def forms(self, cell, separator='', affixes=True, label_filter=None,
            qualifiers=None, edit_view=False):
    if not qualifiers:
      qualifiers = Qualifier.objects.all()
    endings = Ending.objects.filter(
      base_form_label=cell.base_form_label, pattern=self.pattern)
    if label_filter:
      endings = endings.filter(base_form_label__symbol__regex=label_filter)
    if not edit_view:
      l_qual = set(self.lexeme.qualifiers.all() & qualifiers)
      # podgląd może być na niezapisanym lipie
      lip_qual = set(self.qualifiers.all() & qualifiers if self.pk else ())
    forms = [
      (
        (cell.index, self.index, ending.index),
        (cell.prefix + self.root + separator + ending.string + cell.suffix
        if affixes else self.root + separator + ending.string),
        #+ '#' + cell.base_form_label.symbol,
        combine_qualifiers(l_qual, lip_qual,
                           set(ending.qualifiers.all() & qualifiers))
        if not edit_view else set(ending.qualifiers.all() & qualifiers),
      )
      for ending in endings
    ]
    return forms

  def editable_vocabularies(self, user):
    return self.lexeme.editable_vocabularies(user)

  def __unicode__(self):
    return '%s : %s/%s : %s' % (
      self.lexeme.entry,
      self.pattern.name,
      self.pattern.type.symbol,
      self.inflection_characteristic.symbol,
    )

  class Meta:
    db_table = 'odmieniasie'
    unique_together = ('lexeme', 'index')
    ordering = ['index']

def all_forms(pattern, ic, pos, base, variant='1', affixes=True):
  root = get_root(base, pos, pattern, ic)
  tt = TableTemplate.objects.get(
    variant=variant, pattern_type=pattern.type, inflection_characteristic=ic)
  forms = set()
  for cell in tt.cell_set.all():
    endings = Ending.objects.filter(
      base_form_label=cell.base_form_label, pattern=pattern)
    forms |= set(
      cell.prefix + root + ending.string + cell.suffix
      if affixes else root + ending.string
      for ending in endings)
  return forms

def combine_qualifiers(l_qualifiers, lip_qualifiers, e_qualifiers):
  qualifiers = set(l_qualifiers)
  for q in list(lip_qualifiers) + list(e_qualifiers):
    if q.exclusion_class:
      excluded = set(q.exclusion_class.qualifier_set.all())
      qualifiers -= excluded
    qualifiers.add(q)
  return qualifiers

def filter_visible_lips(lips, user):
  vocabs = visible_vocabularies(user)
  return lips.filter(lexeme__vocabularies__in=vocabs).distinct()


# Sluzy do doczepienia flag do poszczegolnych form
# poszczegolnych leksemow
#class UncommonForm(Model):
#  lexeme_inflection_pattern = ForeignKey(
#    LexemeInflectionPattern, db_column='o_id')
#  #raczej tag, ale z jakiego tagsetu ?
#  #base_form_label/tag =
#  qualifiers = ManyToManyField(
#    Qualifier, blank=True, db_table='kwalifikatory_form')
#
#  class Meta:
#    db_table = 'formy_wyjatkowe'
#    unique_together = (
#      'lexeme_inflection_pattern',
#      'tag',
#    )


class Vocabulary(Model):
  id = CharField(max_length=64, primary_key=True, db_column='slownik')
  lexemes = ManyToManyField(Lexeme, blank=True, through='LexemeAssociation',
                            related_name='vocabularies')
  managers = ManyToManyField(User, blank=True,
                             related_name='managed_vocabularies')
  viewers = ManyToManyField(User, blank=True,
                            related_name='visible_vocabularies')
  editors = ManyToManyField(User, blank=True,
                            related_name='editable_vocabularies')
  # bardziej by pasowało w Classification, ale już trudno
  classifications = ManyToManyField(Classification, blank=True,
                                    related_name='vocabularies')

  def owned_lexemes_pk(self):
    return self.owned_lexemes.values_list('pk', flat=True)

  def all_viewers(self):
    perm = Permission.objects.get(codename='view_all_lexemes')
    return self.viewers.all().distinct() | users_with_perm(perm)

  def all_editors(self):
    return self.editors.all()

  def all_managers(self):
    perm = Permission.objects.get(codename='manage_all_vocabularies')
    return self.managers.all().distinct() | users_with_perm(perm)

  def add_lexeme(self, lexeme):
    la, created = LexemeAssociation.objects.get_or_create(
      lexeme=lexeme, vocabulary=self)
    return created

  def remove_lexeme(self, lexeme):
    assert self != lexeme.owner_vocabulary
    LexemeAssociation.objects.filter(lexeme=lexeme, vocabulary=self).delete()

  def set_lexeme(self, lexeme, add):
    if add:
      self.add_lexeme(lexeme)
    else:
      self.remove_lexeme(lexeme)

  def __unicode__(self):
    return self.id

  class Meta:
    db_table = 'slowniki'
    permissions = (
      ('manage_vocabulary', u'Może zarządzać słownikami'),
      ('manage_all_vocabularies', u'Zarządza wszystkimi słownikami'),
    )

def visible_vocabularies(user):
  if user.has_perm('dictionary.view_all_lexemes'):
    return Vocabulary.objects.all()
  else:
    return user.visible_vocabularies.all()

def editable_vocabularies(user):
  return user.editable_vocabularies.all()

def managed_vocabularies(user):
  if user.has_perm('dictionary.manage_all_vocabularies'):
    return Vocabulary.objects.all()
  else:
    return user.managed_vocabularies.all()

class LexemeAssociation(Model):
  lexeme = ForeignKey(Lexeme, db_column='l_id')
  vocabulary = ForeignKey(Vocabulary, db_column='slownik')

  objects = LexemeNotDeletedManager()
  all_objects = Manager()

  def __unicode__(self):
    return '%s/%s' % (self.lexeme.entry, self.vocabulary.id)

  class Meta:
    db_table = 'leksemy_w_slownikach'
    unique_together = ['lexeme', 'vocabulary']


class CrossReferenceType(Model):
  symbol = CharField(max_length=10, db_column='typods')
  desc = CharField(max_length=40, db_column='naglowek')
  index = IntegerField(db_column='kolejnosc')
  from_pos = ForeignKey(
    PartOfSpeech, db_column='pos1', related_name='crtype_to')
  to_pos = ForeignKey(
    PartOfSpeech, db_column='pos2', related_name='crtype_from')
  #reverse = ForeignKey('self', db_column='odwrotny')

  def __unicode__(self):
    return self.symbol

  class Meta:
    db_table = 'typyodsylaczy'


class CRManager(Manager):
  use_for_related_field = True

  def get_query_set(self):
    return super(CRManager, self).get_query_set().filter(
      from_lexeme__deleted=False, to_lexeme__deleted=False)

class CrossReference(Model):
  from_lexeme = ForeignKey(Lexeme, db_column='l_id_od', related_name='refs_to')
  to_lexeme = ForeignKey(
    Lexeme, db_column='l_id_do', related_name='refs_from',
    verbose_name=u'nr docelowy')
  type = ForeignKey(
    CrossReferenceType, db_column='typods_id', verbose_name=u'typ')

  objects = CRManager()
  all_objects = Manager()

  def __unicode__(self):
    return '%s: %s -> %s' % (
      self.type.symbol, self.from_lexeme.entry, self.to_lexeme.entry)

  class Meta:
    db_table = 'odsylacze'


class Variant(Model):
  id = CharField(max_length=32, primary_key=True, db_column='wariant')

  def __unicode__(self):
    return self.id

  class Meta:
    db_table = 'warianty'

class TableTemplate(Model):
  variant = ForeignKey(Variant, db_column='wariant')
  pattern_type = ForeignKey(PatternType, db_column='wtyp')
  inflection_characteristic = ForeignKey(
    InflectionCharacteristic, db_column='charfl')

  def __unicode__(self):
    return '%s : %s : %s : %s' % (
      self.variant, self.inflection_characteristic.part_of_speech,
      self.pattern_type.symbol, self.inflection_characteristic)

  class Meta:
    db_table = 'szablony_tabel'

#klatka paradygmatu
#(element szablonu tabelki odmiany)
class Cell(Model):
  table_template = ForeignKey(TableTemplate, db_column='st_id')
  #etykieta formy bazowej
  base_form_label = ForeignKey(BaseFormLabel, db_column='efobaz')
  #znacznik docelowego tagsetu
  tag = TextField(blank=True, db_column='tag')
  prefix = CharField(max_length=20, blank=True, db_column='prefiks')
  suffix = CharField(max_length=20, blank=True, db_column='sufiks')
  #kolejnosc klatki w paradygmacie
  index = IntegerField(db_column='kind')

  def __unicode__(self):
    return '%s [%s] %s- -%s {%s}' % (
      self.table_template, self.base_form_label, self.prefix, self.suffix,
      self.tag)

  class Meta:
    db_table = 'klatki'
    ordering = ['index']

class TableCell(Model):
  cell = OneToOneField(Cell, db_column='k_id')
  row = IntegerField()
  col = IntegerField()
  rowspan = IntegerField()
  colspan = IntegerField()

  def __unicode__(self):
    return '%s [%s->%s,%s->%s]' % (
      self.cell, self.row, self.rowspan, self.col, self.colspan)

  class Meta:
    db_table = 'komorki_tabel'

class TableHeader(Model):
  table_template = ForeignKey(TableTemplate, db_column='st_id')
  row = IntegerField()
  col = IntegerField()
  rowspan = IntegerField()
  colspan = IntegerField()
  label = CharField(max_length=64, blank=True, db_column='nagl')
  css_class = CharField(max_length=8, db_column='styl')

  def __unicode__(self):
    return '%s (%s,%s) [%s]' % (
      self.label, self.row, self.col, self.css_class)

  class Meta:
    db_table = 'naglowki_tabel'

# na szybko i brudno
class ParadygmatyWSJP(Model):
  wariant = CharField(max_length=4)
  typr = ForeignKey(PatternType, db_column='typr')
  charfl = ForeignKey(InflectionCharacteristic, db_column='charfl')
  podparad = CharField(max_length=4, blank=True)
  row = IntegerField()
  col = IntegerField()
  rowspan = IntegerField()
  colspan = IntegerField()
  efobaz = ForeignKey(BaseFormLabel, db_column='efobaz')
  morf = TextField()
  pref = CharField(max_length=20, blank=True)
  suf = CharField(max_length=20, blank=True)
  kskl = IntegerField()

  class Meta:
    db_table = 'paradygmatywsjp'

class LexemeForm(Model):
  lexeme = ForeignKey(Lexeme)
  form = CharField(max_length=128, db_index=True)

  objects = LexemeNotDeletedManager()
  all_objects = Manager()

class SavedFilter(Model):
  serialized_filter = TextField()
  name = CharField(max_length=64)
  user = ForeignKey(User)

  class Meta:
    unique_together = ('name', 'user')

class SavedExportData(Model):
  serialized_data = TextField()
  name = CharField(max_length=64, unique=True)

# model przeznaczony tylko do odczytu!
class History(Model):
  table_name = CharField(max_length=120, db_column='table_name_')
  column_name = CharField(max_length=120, db_column='column_name_', blank=True)
  timestamp = DateTimeField(db_column='timestamp_')
  user = ForeignKey(User, db_column='user_id_', db_index=True)
  old_value = TextField(db_column='old_value_', blank=True)
  new_value = TextField(db_column='new_value_', blank=True)
  lexeme = ForeignKey(
    Lexeme, db_column='lexeme_id_', null=True, blank=True, db_index=True)
  pattern = ForeignKey(
    Pattern, db_column='pattern_id_', null=True, blank=True, db_index=True)
  row_id = IntegerField(db_column='id_')
  operation = CharField(max_length=120, db_column='operation_')
  table_oid = IntegerField(db_column='table_oid_')
  column_ord = IntegerField(db_column='ordinal_position_of_column_')
  transaction_began = DateTimeField(db_column='transaction_began_')

  def __unicode__(self):
    return '%s %s.%s %s -> %s' % (
      self.operation, self.table_name, self.column_name, repr(self.old_value),
      repr(self.new_value))

  class Meta:
    db_table = 'history'

class InputLexeme(Model):
  entry = CharField(max_length=64, db_index=True)

class InputForm(Model):
  input_lexeme = ForeignKey(InputLexeme)
  form = CharField(max_length=64, db_index=True)
  #tag = TextField()