# Copyright (c) 2013-2015 Sergei Snegirev <tz4678@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from vkapi import *
from vkapi.auth import CLIENT_ID, CLIENT_SECRET, SCOPE, DirectAuth, AuthError
from PyQt5.QtWidgets import QDialog, QLineEdit, QMessageBox
from PyQt5.QtGui import QPixmap
from .ui_CaptchaDialog import Ui_CaptchaDialog
from .ui_AuthDialog import Ui_AuthDialog

__author__ = "Sergei Snegirev <tz4678@gmail.com>"
__license__ = "MIT"


class CaptchaDialog(QDialog):
    def __init__(self, client, image_url, parent=None):
        super().__init__(parent)
        self.client = client
        self.image_url = image_url
        self.ui = Ui_CaptchaDialog()
        self.ui.setupUi(self)
        self.ui.refreshButton.clicked.connect(self.refresh)
        self.loadImage()

    def loadImage(self):
        data = self.client.get(self.image_url).content
        pixmap = QPixmap()
        pixmap.loadFromData(data)
        self.ui.captchaLabel.setPixmap(pixmap)

    def refresh(self):
        self.loadImage()
        self.ui.captchaEdit.setText("")
        self.ui.captchaEdit.setFocus()


# Данные от официального приложения для iPhone
CLIENT_ID = 3140623
CLIENT_SECRET = 'VeWdmVclDCtn6ihuP1nt'
SCOPE = 'notify,friends,photos,audio,video,docs,notes,pages,status,offers,' + \
'questions,wall,groups,messages,email,notifications,stats,ads,offline,nohttps'


class DirectAuthDialog(QDialog):
    def __init__(self,
                 client,
                 client_id=CLIENT_ID,
                 client_secret=CLIENT_SECRET,
                 scope=SCOPE,
                 parent=None):
        super().__init__(parent)
        self.client = client
        self.client_id = client_id
        self.client_secret = client_secret
        self.scope = scope
        self.ui = Ui_AuthDialog()
        self.ui.setupUi(self)
        self.ui.loginButton.clicked.connect(self.login)
        self.ui.showPasswordCheck.stateChanged.connect(self.showPassword)

    def showPassword(self, state):
        mode = QLineEdit.Normal if state else QLineEdit.Password
        self.ui.passwordEdit.setEchoMode(mode)

    def login(self):
        username = self.ui.usernameEdit.text()
        password = self.ui.passwordEdit.text()
        error = ""

        if not username:
            error = "Username field is required"
        elif not password:
            error = "Password field is required"
        else:
            self.ui.loginButton.setDisabled(True)

            params = dict(username=username,
                          password=password,
                          client_id=self.client_id,
                          client_secret=self.client_secret,
                          scope=self.scope,
                          grant_type="password")

            try:
                self._login(params)
            except AuthError as exc:
                error = str(exc)

            self.ui.loginButton.setEnabled(True)

        if error:
            QMessageBox.warning(self, "Authorization Error", error)
        else:
            QDialog.accept(self)

    def _login(self, params):
        url = 'https://oauth.vk.com/token'
        r = self.client.post(url, params)
        data = r.json()

        if 'error' in data:
            error = AuthError(data)

            if error.reason == 'need_captcha':
                d = CaptchaDialog(self.client, error.captcha_img, self)

                if d.exec_():
                    params['captcha_key'] = d.ui.captchaEdit.text()
                    params['captcha_sid'] = error.captcha_sid
                    return self._login(params)

            raise error

        self.client.access_token = data['access_token']
        self.client.token_expires = data['expires_in']

        if self.client.token_expires > 0:
            self.client.token_expires += time.time()

        self.client.user_id = data.get('user_id')
        self.client.secret_token = data.get('secret')

# vkapi/auth.py
################################################################################
# Copyright (c) 2013-2015 Sergei Snegirev <tz4678@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import time

__author__ = "Sergei Snegirev <tz4678@gmail.com>"
__license__ = "MIT"

# Данные от официального приложения для iPhone
CLIENT_ID = 3140623
CLIENT_SECRET = 'VeWdmVclDCtn6ihuP1nt'
SCOPE = 'notify,friends,photos,audio,video,docs,notes,pages,status,offers,' + \
'questions,wall,groups,messages,email,notifications,stats,ads,offline,nohttps'


class DirectAuth:
    AUTH_URL = 'https://oauth.vk.com/token'

    def __init__(self,
                 client,
                 client_id=CLIENT_ID,
                 client_secret=CLIENT_SECRET,
                 scope=SCOPE):
        self.client = client
        self.client_id = client_id
        self.client_secret = client_secret
        self.scope = scope

    def auth(self, username, password):
        params = dict(username=username,
                      password=password,
                      client_id=self.client_id,
                      client_secret=self.client_secret,
                      scope=self.scope,
                      grant_type="password")

        def try_auth():
            data = self.client.post(self.AUTH_URL, params).json()

            if 'error' in data:
                error = AuthError(data)

                if error.reason == 'need_captcha':
                    params['captcha_key'] = self.solveCaptcha(error.captcha_img)
                    params['captcha_sid'] = error.captcha_sid
                    return try_auth()

                raise error

            self.client.access_token = data['access_token']
            self.client.token_expires = data['expires_in']

            if self.client.token_expires > 0:
                self.client.token_expires += time.time()

            self.client.user_id = data.get('user_id')
            self.client.secret_token = data.get('secret')

        try_auth()

    def solveCaptcha(self, image_url):
        raise NotImplementedError("This method is not implemented yet")


class AuthError(Exception):
    def __init__(self, details):
        super().__init__("{error}: {error_description}".format(**details) \
            if 'error_description' in details else details['error'])
        self.reason = details['error']
        self.description = details.get('error_description')
        self.captcha_img = details.get('captcha_img')
        self.captcha_sid = details.get('captcha_sid')
        self.redirect_uri = details.get('redirect_uri')

################################################################################


class UiClient(Client):
    def __init__(self, widget=None, **kw):
        super().__init__(**kw)
        self.widget = widget

    def solveCaptcha(self, image_url):
        d = CaptchaDialog(self, image_url, self.widget)

        if d.exec_():
            return d.ui.captchaEdit.text()

        raise ClientError("Request canceled")


def