# Copyright 2015 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

""" Re-usable input widgets
"""

import logging
import re
from functools import partial

from urwid import Edit, IntEdit

from subiquitycore.ui.container import WidgetWrap
from subiquitycore.ui.selector import Selector

log = logging.getLogger("subiquitycore.ui.interactive")


class StringEditor(Edit):
    """Edit input class

    Attaches its result to the `value` accessor.
    """

    @property
    def value(self):
        return self.get_edit_text()

    @value.setter  # NOQA
    def value(self, value):
        self.set_edit_text(value)


class PasswordEditor(StringEditor):
    """Password input prompt with masking"""

    def __init__(self, mask="*"):
        super().__init__(mask=mask)


class RestrictedEditor(StringEditor):
    """Editor that only allows certain characters."""

    def __init__(self, allowed=None):
        super().__init__()
        self.matcher = re.compile(allowed)

    def valid_char(self, ch):
        return len(ch) == 1 and self.matcher.match(ch) is not None


RealnameEditor = partial(RestrictedEditor, r"[^:,=]")
EmailEditor = partial(RestrictedEditor, r"[-a-zA-Z0-9_.@+=]")


class UsernameEditor(StringEditor):
    """Username input prompt with input rules"""

    def keypress(self, size, key):
        """restrict what chars we allow for username"""
        if self._command_map[key] is not None:
            return super().keypress(size, key)
        new_text = self.insert_text_result(key)[0]
        username = r"[a-z_][a-z0-9_-]*"
        # don't allow non username chars
        if new_text != "" and re.match(username, new_text) is None:
            return False
        return super().keypress(size, key)


class IntegerEditor(WidgetWrap):
    """IntEdit input class"""

    def __init__(self, default=0):
        self._edit = IntEdit(default=default)
        super().__init__(self._edit)

    @property
    def value(self):
        return self._edit.value()

    @value.setter
    def value(self, val):
        return self._edit.set_edit_text(str(val))


class YesNo(Selector):
    """Yes/No selector"""

    def __init__(self):
        opts = [_("Yes"), _("No")]
        super().__init__(opts)