from rhodecode.config.routing import ADMIN_PREFIX

from rhodecode.lib.utils import repo_name_slug

from rhodecode.lib.auth import authenticate, get_crypt_password

from rhodecode.lib.exceptions import LdapImportError

from rhodecode.model.db import User, UsersGroup, RepoGroup, Repository

from rhodecode import BACKENDS

log = logging.getLogger(__name__)

#this is needed to translate the messages using _() in validators

class State_obj(object):

    _ = staticmethod(_)

#==============================================================================

# VALIDATORS

#==============================================================================

class ValidAuthToken(formencode.validators.FancyValidator):

    messages = {'invalid_token':_('Token mismatch')}

    def validate_python(self, value, state):

        if value != authentication_token():

            raise formencode.Invalid(self.message('invalid_token', state,

                                            search_number=value), value, state)

def ValidUsername(edit, old_data):

    class _ValidUsername(formencode.validators.FancyValidator):

        def validate_python(self, value, state):

            if value in ['default', 'new_user']:

                raise formencode.Invalid(_('Invalid username'), value, state)

            #check if user is unique

            old_un = None

            if edit:

                old_un = User.get(old_data.get('user_id')).username

            if old_un != value or not edit:

                if User.get_by_username(value, case_insensitive=True):

                    raise formencode.Invalid(_('This username already '

                                               'exists') , value, state)

            if re.match(r'^[a-zA-Z0-9]{1}[a-zA-Z0-9\-\_\.]+$', value) is None:

                raise formencode.Invalid(_('Username may only contain '

                                           'alphanumeric characters '

                                           'underscores, periods or dashes '

                                           'and must begin with alphanumeric '

                                           'character'), value, state)

    return _ValidUsername

def ValidUsersGroup(edit, old_data):

    class _ValidUsersGroup(formencode.validators.FancyValidator):

        def validate_python(self, value, state):

            if value in ['default']:

                raise formencode.Invalid(_('Invalid group name'), value, state)

            #check if group is unique

            old_ugname = None

            if edit:

                old_ugname = UsersGroup.get(

                            old_data.get('users_group_id')).users_group_name

            if old_ugname != value or not edit:

                if UsersGroup.get_by_group_name(value, cache=False,

                                               case_insensitive=True):

                    raise formencode.Invalid(_('This users group '

                                               'already exists') , value,

                                             state)

            if re.match(r'^[a-zA-Z0-9]{1}[a-zA-Z0-9\-\_\.]+$', value) is None:

                raise formencode.Invalid(_('RepoGroup name may only contain '

                                           'alphanumeric characters '

                                           'underscores, periods or dashes '

                                           'and must begin with alphanumeric '

                                           'character'), value, state)

    return _ValidUsersGroup

def ValidReposGroup(edit, old_data):

    class _ValidReposGroup(formencode.validators.FancyValidator):

        def validate_python(self, value, state):

            # TODO WRITE VALIDATIONS

            group_name = value.get('group_name')

            group_parent_id = value.get('group_parent_id')

            # slugify repo group just in case :)

            slug = repo_name_slug(group_name)

            # check for parent of self

            parent_of_self = lambda:(old_data['group_id'] == int(group_parent_id)

                                     if group_parent_id else False)

            if edit and parent_of_self():

                    e_dict = {'group_parent_id':_('Cannot assign this group '

                                                  'as parent')}

                    raise formencode.Invalid('', value, state,

                                             error_dict=e_dict)

            old_gname = None

            if edit:

                old_gname = RepoGroup.get(old_data.get('group_id')).group_name

            if old_gname != group_name or not edit:

                # check filesystem

                gr = RepoGroup.query().filter(RepoGroup.group_name == slug)\

                    .filter(RepoGroup.group_parent_id == group_parent_id).scalar()

                if gr:

                    e_dict = {'group_name':_('This group already exists')}

                    raise formencode.Invalid('', value, state,

                                             error_dict=e_dict)

    return _ValidReposGroup

class ValidPassword(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        if value:

            if value.get('password'):

                try:

                    value['password'] = get_crypt_password(value['password'])

                except UnicodeEncodeError:

                    e_dict = {'password':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            if value.get('password_confirmation'):

                try:

                    value['password_confirmation'] = \

                        get_crypt_password(value['password_confirmation'])

                except UnicodeEncodeError:

                    e_dict = {'password_confirmation':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            if value.get('new_password'):

                try:

                    value['new_password'] = \

                        get_crypt_password(value['new_password'])

                except UnicodeEncodeError:

                    e_dict = {'new_password':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            return value

class ValidPasswordsMatch(formencode.validators.FancyValidator):

    def validate_python(self, value, state):

        pass_val = value.get('password') or value.get('new_password')

        if pass_val != value['password_confirmation']:

            e_dict = {'password_confirmation':

                   _('Passwords do not match')}

            raise formencode.Invalid('', value, state, error_dict=e_dict)

class ValidAuth(formencode.validators.FancyValidator):

    messages = {

        'invalid_password':_('invalid password'),

        'invalid_login':_('invalid user name'),

        'disabled_account':_('Your account is disabled')

    }

    # error mapping

    e_dict = {'username':messages['invalid_login'],

              'password':messages['invalid_password']}

    e_dict_disable = {'username':messages['disabled_account']}

    def validate_python(self, value, state):

        password = value['password']

        username = value['username']

        user = User.get_by_username(username)

        if authenticate(username, password):

            return value

        else:

            if user and user.active is False:

                log.warning('user %s is disabled', username)

                raise formencode.Invalid(self.message('disabled_account',

                                         state=State_obj),

                                         value, state,

                                         error_dict=self.e_dict_disable)

            else:

                log.warning('user %s not authenticated', username)

                raise formencode.Invalid(self.message('invalid_password',

                                         state=State_obj), value, state,

                                         error_dict=self.e_dict)

class ValidRepoUser(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        try:

            User.query().filter(User.active == True)\

                .filter(User.username == value).one()

        except Exception:

            raise formencode.Invalid(_('This username is not valid'),

                                     value, state)

        return value

def ValidRepoName(edit, old_data):

    class _ValidRepoName(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            repo_name = value.get('repo_name')

            slug = repo_name_slug(repo_name)

            if slug in [ADMIN_PREFIX, '']:

                e_dict = {'repo_name': _('This repository name is disallowed')}

                raise formencode.Invalid('', value, state, error_dict=e_dict)

            if value.get('repo_group'):

                gr = RepoGroup.get(value.get('repo_group'))

                group_path = gr.full_path

                # value needs to be aware of group name in order to check

                # db key This is an actual just the name to store in the

                # database

                repo_name_full = group_path + RepoGroup.url_sep() + repo_name

            else:

                group_path = ''

                repo_name_full = repo_name

            value['repo_name_full'] = repo_name_full

            rename = old_data.get('repo_name') != repo_name_full

            create = not edit

            if  rename or create:

                if group_path != '':

                    if Repository.get_by_repo_name(repo_name_full):

                        e_dict = {'repo_name':_('This repository already '

                                                'exists in a group "%s"') %

                                  gr.group_name}

                        raise formencode.Invalid('', value, state,

                                                 error_dict=e_dict)

                elif RepoGroup.get_by_group_name(repo_name_full):

                        e_dict = {'repo_name':_('There is a group with this'

                                                ' name already "%s"') %

                                  repo_name_full}

                        raise formencode.Invalid('', value, state,

                                                 error_dict=e_dict)

                elif Repository.get_by_repo_name(repo_name_full):

                        e_dict = {'repo_name':_('This repository '

                                                'already exists')}

                        raise formencode.Invalid('', value, state,

                                                 error_dict=e_dict)

            return value

    return _ValidRepoName

def ValidForkName(*args, **kwargs):

    return ValidRepoName(*args, **kwargs)

def SlugifyName():

    class _SlugifyName(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            return repo_name_slug(value)

    return _SlugifyName

def ValidCloneUri():

    from mercurial.httprepo import httprepository, httpsrepository

    from rhodecode.lib.utils import make_ui

    class _ValidCloneUri(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            if not value:

                pass

            elif value.startswith('https'):

                try:

                    httpsrepository(make_ui('db'), value).capabilities

                except Exception, e:

                    log.error(traceback.format_exc())

                    raise formencode.Invalid(_('invalid clone url'), value,

                                             state)

            elif value.startswith('http'):

                try:

                    httprepository(make_ui('db'), value).capabilities

                except Exception, e:

                    log.error(traceback.format_exc())

                    raise formencode.Invalid(_('invalid clone url'), value,

                                             state)

            else:

                raise formencode.Invalid(_('Invalid clone url, provide a '

                                           'valid clone http\s url'), value,

                                         state)

            return value

    return _ValidCloneUri

def ValidForkType(old_data):

    class _ValidForkType(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            if old_data['repo_type'] != value:

                raise formencode.Invalid(_('Fork have to be the same '

                                           'type as original'), value, state)

            return value

    return _ValidForkType

class ValidPerms(formencode.validators.FancyValidator):

    messages = {'perm_new_member_name':_('This username or users group name'

                                         ' is not valid')}

    def to_python(self, value, state):

        perms_update = []

        perms_new = []

        #build a list of permission to update and new permission to create

        for k, v in value.items():

            #means new added member to permissions

            if k.startswith('perm_new_member'):

                new_perm = value.get('perm_new_member', False)

                new_member = value.get('perm_new_member_name', False)

                new_type = value.get('perm_new_member_type')

                if new_member and new_perm:

                    if (new_member, new_perm, new_type) not in perms_new:

                        perms_new.append((new_member, new_perm, new_type))

            elif k.startswith('u_perm_') or k.startswith('g_perm_'):

                member = k[7:]

                t = {'u':'user',

                     'g':'users_group'}[k[0]]

                if member == 'default':

                    if value['private']:

                        #set none for default when updating to private repo

                        v = 'repository.none'

                perms_update.append((member, v, t))

        value['perms_updates'] = perms_update

        value['perms_new'] = perms_new

        #update permissions

        for k, v, t in perms_new:

            try:

                if t is 'user':

                    self.user_db = User.query()\

                        .filter(User.active == True)\

                        .filter(User.username == k).one()

                if t is 'users_group':

                    self.user_db = UsersGroup.query()\

                        .filter(UsersGroup.users_group_active == True)\

                        .filter(UsersGroup.users_group_name == k).one()

            except Exception:

                msg = self.message('perm_new_member_name',

                                     state=State_obj)

                raise formencode.Invalid(msg, value, state,

                                         error_dict={'perm_new_member_name':msg})

        return value

class ValidSettings(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        # settings  form can't edit user

        if value.has_key('user'):

            del['value']['user']

        return value

class ValidPath(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        if not os.path.isdir(value):

            msg = _('This is not a valid path')

            raise formencode.Invalid(msg, value, state,

                                     error_dict={'paths_root_path':msg})

        return value

def UniqSystemEmail(old_data):

    class _UniqSystemEmail(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            value = value.lower()

                user = User.get_by_email(value, case_insensitive=True)

                if user:

                    raise formencode.Invalid(

                                    _("This e-mail address is already taken"),

                                    value, state)

            return value

    return _UniqSystemEmail

class ValidSystemEmail(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        value = value.lower()

        user = User.get_by_email(value, case_insensitive=True)

        if  user is None:

            raise formencode.Invalid(_("This e-mail address doesn't exist.") ,

                                     value, state)

        return value

class LdapLibValidator(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        try:

            import ldap

        except ImportError:

            raise LdapImportError

        return value

class AttrLoginValidator(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        if not value or not isinstance(value, (str, unicode)):

            raise formencode.Invalid(_("The LDAP Login attribute of the CN "

                                       "must be specified - this is the name "

                                       "of the attribute that is equivalent "

                                       "to 'username'"),

                                     value, state)

        return value

#===============================================================================

# FORMS

#===============================================================================

class LoginForm(formencode.Schema):

    allow_extra_fields = True

    filter_extra_fields = True

    username = UnicodeString(

                             strip=True,

                             min=1,

                             not_empty=True,

                             messages={

                                'empty':_('Please enter a login'),

                                'tooShort':_('Enter a value %(min)i characters long or more')}

                            )

    password = UnicodeString(

                            strip=True,

                            min=3,

                            not_empty=True,

                            messages={

                                'empty':_('Please enter a password'),

                                'tooShort':_('Enter %(min)i characters or more')}

                                )

    chained_validators = [ValidAuth]

def UserForm(edit=False, old_data={}):

    class _UserForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        username = All(UnicodeString(strip=True, min=1, not_empty=True),

                       ValidUsername(edit, old_data))

        if edit:

            new_password = All(UnicodeString(strip=True, min=6, not_empty=False))

            password_confirmation = All(UnicodeString(strip=True, min=6, not_empty=False))

            admin = StringBoolean(if_missing=False)

        else:

            password = All(UnicodeString(strip=True, min=6, not_empty=True))

            password_confirmation = All(UnicodeString(strip=True, min=6, not_empty=False))

        active = StringBoolean(if_missing=False)

        name = UnicodeString(strip=True, min=1, not_empty=True)

        lastname = UnicodeString(strip=True, min=1, not_empty=True)

        email = All(Email(not_empty=True), UniqSystemEmail(old_data))

        chained_validators = [ValidPasswordsMatch, ValidPassword]

    return _UserForm

def UsersGroupForm(edit=False, old_data={}, available_members=[]):

    class _UsersGroupForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        users_group_name = All(UnicodeString(strip=True, min=1, not_empty=True),

                       ValidUsersGroup(edit, old_data))

        users_group_active = StringBoolean(if_missing=False)

        if edit:

            users_group_members = OneOf(available_members, hideList=False,

                                        testValueList=True,

                                        if_missing=None, not_empty=False)

    return _UsersGroupForm

def ReposGroupForm(edit=False, old_data={}, available_groups=[]):

    class _ReposGroupForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        group_name = All(UnicodeString(strip=True, min=1, not_empty=True),

                               SlugifyName())

        group_description = UnicodeString(strip=True, min=1,

                                                not_empty=True)

        group_parent_id = OneOf(available_groups, hideList=False,

                                        testValueList=True,

                                        if_missing=None, not_empty=False)

        chained_validators = [ValidReposGroup(edit, old_data)]

    return _ReposGroupForm

def RegisterForm(edit=False, old_data={}):

    class _RegisterForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        username = All(ValidUsername(edit, old_data),

                       UnicodeString(strip=True, min=1, not_empty=True))

        password = All(UnicodeString(strip=True, min=6, not_empty=True))

        password_confirmation = All(UnicodeString(strip=True, min=6, not_empty=True))

        active = StringBoolean(if_missing=False)

        name = UnicodeString(strip=True, min=1, not_empty=True)

        lastname = UnicodeString(strip=True, min=1, not_empty=True)

        email = All(Email(not_empty=True), UniqSystemEmail(old_data))

        chained_validators = [ValidPasswordsMatch, ValidPassword]

    return _RegisterForm

def PasswordResetForm():

    class _PasswordResetForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        email = All(ValidSystemEmail(), Email(not_empty=True))

    return _PasswordResetForm

def RepoForm(edit=False, old_data={}, supported_backends=BACKENDS.keys(),

             repo_groups=[]):

    class _RepoForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = False

        repo_name = All(UnicodeString(strip=True, min=1, not_empty=True),

                        SlugifyName())

        clone_uri = All(UnicodeString(strip=True, min=1, not_empty=False),

                        ValidCloneUri()())

        repo_group = OneOf(repo_groups, hideList=True)

        repo_type = OneOf(supported_backends)

        description = UnicodeString(strip=True, min=1, not_empty=True)

        private = StringBoolean(if_missing=False)

        enable_statistics = StringBoolean(if_missing=False)

        enable_downloads = StringBoolean(if_missing=False)

        if edit:

            #this is repo owner

            user = All(UnicodeString(not_empty=True), ValidRepoUser)

        chained_validators = [ValidRepoName(edit, old_data), ValidPerms]

    return _RepoForm

def RepoForkForm(edit=False, old_data={}, supported_backends=BACKENDS.keys(),

                 repo_groups=[]):

    class _RepoForkForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = False

        repo_name = All(UnicodeString(strip=True, min=1, not_empty=True),

                        SlugifyName())

        repo_group = OneOf(repo_groups, hideList=True)

        repo_type = All(ValidForkType(old_data), OneOf(supported_backends))

        description = UnicodeString(strip=True, min=1, not_empty=True)

        private = StringBoolean(if_missing=False)

        copy_permissions = StringBoolean(if_missing=False)

        update_after_clone = StringBoolean(if_missing=False)

        fork_parent_id = UnicodeString()

        chained_validators = [ValidForkName(edit, old_data)]

    return _RepoForkForm

def RepoSettingsForm(edit=False, old_data={}, supported_backends=BACKENDS.keys(),

                     repo_groups=[]):

    class _RepoForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = False

        repo_name = All(UnicodeString(strip=True, min=1, not_empty=True),

                        SlugifyName())

        description = UnicodeString(strip=True, min=1, not_empty=True)

        repo_group = OneOf(repo_groups, hideList=True)

        private = StringBoolean(if_missing=False)

        chained_validators = [ValidRepoName(edit, old_data), ValidPerms,

                              ValidSettings]

    return _RepoForm

def ApplicationSettingsForm():

    class _ApplicationSettingsForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = False

        rhodecode_title = UnicodeString(strip=True, min=1, not_empty=True)

        rhodecode_realm = UnicodeString(strip=True, min=1, not_empty=True)

        rhodecode_ga_code = UnicodeString(strip=True, min=1, not_empty=False)

    return _ApplicationSettingsForm

def ApplicationUiSettingsForm():

    class _ApplicationUiSettingsForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = False

        web_push_ssl = OneOf(['true', 'false'], if_missing='false')

        paths_root_path = All(ValidPath(), UnicodeString(strip=True, min=1, not_empty=True))

        hooks_changegroup_update = OneOf(['True', 'False'], if_missing=False)

        hooks_changegroup_repo_size = OneOf(['True', 'False'], if_missing=False)

        hooks_pretxnchangegroup_push_logger = OneOf(['True', 'False'], if_missing=False)

        hooks_preoutgoing_pull_logger = OneOf(['True', 'False'], if_missing=False)

    return _ApplicationUiSettingsForm

def DefaultPermissionsForm(perms_choices, register_choices, create_choices):

    class _DefaultPermissionsForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        overwrite_default = StringBoolean(if_missing=False)

        anonymous = OneOf(['True', 'False'], if_missing=False)

        default_perm = OneOf(perms_choices)

        default_register = OneOf(register_choices)

        default_create = OneOf(create_choices)

    return _DefaultPermissionsForm

def LdapSettingsForm(tls_reqcert_choices, search_scope_choices, tls_kind_choices):

    class _LdapSettingsForm(formencode.Schema):

        allow_extra_fields = True

        filter_extra_fields = True

        pre_validators = [LdapLibValidator]

        ldap_active = StringBoolean(if_missing=False)

        ldap_host = UnicodeString(strip=True,)

        ldap_port = Number(strip=True,)

        ldap_tls_kind = OneOf(tls_kind_choices)

        ldap_tls_reqcert = OneOf(tls_reqcert_choices)

        ldap_dn_user = UnicodeString(strip=True,)

        ldap_dn_pass = UnicodeString(strip=True,)

        ldap_base_dn = UnicodeString(strip=True,)

        ldap_filter = UnicodeString(strip=True,)

        ldap_search_scope = OneOf(search_scope_choices)

        ldap_attr_login = All(AttrLoginValidator, UnicodeString(strip=True,))

        ldap_attr_firstname = UnicodeString(strip=True,)

        ldap_attr_lastname = UnicodeString(strip=True,)

        ldap_attr_email = UnicodeString(strip=True,)

    return _LdapSettingsForm