#!/usr/bin/env python
# coding: utf8

"""
Dropbox Authentication for web2py
Developed by Massimo Di Pierro (2012)
Same License as Web2py License
"""

# mind here session is dropbox session, not current.session

import os
import re
import urllib
from dropbox import client, rest, session
from gluon import *
from gluon.tools import fetch
from gluon.storage import Storage
import gluon.contrib.simplejson as json


class DropboxAccount(object):

    """
    from gluon.contrib.login_methods.dropbox_account import DropboxAccount
    auth.settings.actions_disabled=['register','change_password',
        'request_reset_password']
    auth.settings.login_form = DropboxAccount(request,
              key="...",
              secret="...",
              access_type="...",
              login_url = "http://localhost:8000/%s/default/user/login" % request.application)
    when logged in
    client = auth.settings.login_form.client
    """

    def __init__(self,
                 request,
                 key="",
                 secret="",
                 access_type="app_folder",
                 login_url="",
                 on_login_failure=None,
                 ):

        self.request = request
        self.key = key
        self.secret = secret
        self.access_type = access_type
        self.login_url = login_url
        self.on_login_failure = on_login_failure
        self.sess = session.DropboxSession(
            self.key, self.secret, self.access_type)

    def get_token(self):
        if not current.session.dropbox_access_token:            
            request_token = current.session.dropbox_request_token
            self.sess.set_request_token(request_token[0], request_token[1])
            access_token = self.sess.obtain_access_token(self.sess.token)
            current.session.dropbox_access_token = \
                (access_token.key, access_token.secret)
        else:
            access_token = current.session.dropbox_access_token
            self.sess.set_token(access_token[0], access_token[1])

    def get_user(self):
        if not current.session.dropbox_request_token:
            return None
        self.get_token()
        user = Storage()
        self.client = client.DropboxClient(self.sess)
        data = self.client.account_info()
        display_name = data.get('display_name', '').split(' ', 1)
        user = dict(email=data.get('email', None),
                    first_name=display_name[0],
                    last_name=display_name[-1],
                    registration_id=data.get('uid', None))
        if not user['registration_id'] and self.on_login_failure:
            redirect(self.on_login_failure)
        return user

    def login_form(self):

        request_token = self.sess.obtain_request_token()
        current.session.dropbox_request_token =  \
            (request_token.key, request_token.secret)
        dropbox_url = self.sess.build_authorize_url(request_token,
                                                    self.login_url)
        redirect(dropbox_url)
        form = IFRAME(_src=dropbox_url,
                      _scrolling="no",
                      _frameborder="no",
                      _style="width:400px;height:240px;")
        return form

    def logout_url(self, next="/"):
        self.sess.unlink()
        current.session.auth = None
        return next

    def get_client(self):
        self.get_token()
        self.client = client.DropboxClient(self.sess)

    def put(self, filename, file):
        if not hasattr(self,'client'): self.get_client()
        return self.client.put_file(filename, file)['bytes']

    def get(self, filename):
        if not hasattr(self,'client'): self.get_client()
        return self.client.get_file(filename)

    def dir(self, path):
        if not hasattr(self,'client'): self.get_client()
        return self.client.metadata(path)


def use_dropbox(auth, filename='private/dropbox.key', **kwargs):
    path = os.path.join(current.request.folder, filename)
    if os.path.exists(path):
        request = current.request
        key, secret, access_type = open(path, 'r').read().strip().split(':')
        host = current.request.env.http_host
        login_url = "http://%s/%s/default/user/login" % \
            (host, request.application)
        auth.settings.actions_disabled = \
            ['register', 'change_password', 'request_reset_password']
        auth.settings.login_form = DropboxAccount(
            request, key=key, secret=secret, access_type=access_type,
            login_url=login_url, **kwargs)