import json
import os
import sys
from urlparse import urlparse

from realms.lib.util import in_vagrant


class Config(object):

    urlparse = urlparse

    APP_PATH = os.path.abspath(os.path.dirname(__file__) + "/../..")
    USER_HOME = os.path.abspath(os.path.expanduser("~"))

    # Best to change to /var/run
    PIDFILE = "/tmp/realms-wiki.pid"

    ENV = 'DEV'

    HOST = "0.0.0.0"
    PORT = 5000
    BASE_URL = 'http://localhost'
    SITE_TITLE = "Realms"

    # https://pythonhosted.org/Flask-SQLAlchemy/config.html#connection-uri-format
    DB_URI = 'sqlite:////tmp/wiki.db'
    # DB_URI = 'mysql://scott:tiger@localhost/mydatabase'
    # DB_URI = 'postgresql://scott:tiger@localhost/mydatabase'
    # DB_URI = 'oracle://scott:tiger@127.0.0.1:1521/sidname'
    # DB_URI = 'crate://'

    # LDAP = {
    #     'URI': '',
    #
    #     # This BIND_DN/BIND_PASSWORD default to '', this is shown here for demonstrative purposes
    #     # The values '' perform an anonymous bind so we may use search/bind method
    #     'BIND_DN': '',
    #     'BIND_AUTH': '',
    #
    #     # Adding the USER_SEARCH field tells the flask-ldap-login that we are using
    #     # the search/bind method
    #     'USER_SEARCH': {'base': 'dc=example,dc=com', 'filter': 'uid=%(username)s'},
    #
    #     # Map ldap keys into application specific keys
    #     'KEY_MAP': {
    #         'name': 'cn',
    #         'company': 'o',
    #         'location': 'l',
    #         'email': 'mail',
    #     }
    # }

    # OAUTH = {
    #     'twitter': {
    #         'key': '',
    #         'secret': ''
    #    },
    #    'github': {
    #        'key': '',
    #        'secret': ''
    #    }
    # }

    # Valid options: simple, redis, memcached
    CACHE_TYPE = 'simple'

    CACHE_REDIS_HOST = '127.0.0.1'
    CACHE_REDIS_PORT = 6379
    CACHE_REDIS_DB = '0'

    CACHE_MEMCACHED_SERVERS = ['127.0.0.1:11211']

    # Valid options: simple, elasticsearch, woosh
    SEARCH_TYPE = 'simple'

    ELASTICSEARCH_URL = 'http://127.0.0.1:9200'
    ELASTICSEARCH_FIELDS = ["name"]

    WHOOSH_INDEX = '/tmp/whoosh'
    WHOOSH_LANGUAGE = 'en'

    # Get ReCaptcha Keys for your domain here:
    # https://www.google.com/recaptcha/admin#whyrecaptcha
    RECAPTCHA_ENABLE = False
    RECAPTCHA_USE_SSL = False
    RECAPTCHA_PUBLIC_KEY = "6LfYbPkSAAAAAB4a2lG2Y_Yjik7MG9l4TDzyKUao"
    RECAPTCHA_PRIVATE_KEY = "6LfYbPkSAAAAAG-KlkwjZ8JLWgwc9T0ytkN7lWRE"
    RECAPTCHA_OPTIONS = {}

    SECRET_KEY = 'CHANGE_ME'

    # Path on file system where wiki data will reside
    WIKI_PATH = '/tmp/wiki'

    # Name of page that will act as home
    WIKI_HOME = 'home'

    AUTH_LOCAL_ENABLE = True
    ALLOW_ANON = True
    REGISTRATION_ENABLED = True
    PRIVATE_WIKI = False

    # None, firepad, and/or togetherjs
    COLLABORATION = 'togetherjs'

    # Required for firepad
    FIREBASE_HOSTNAME = None

    # Page names that can't be modified
    WIKI_LOCKED_PAGES = []

    ROOT_ENDPOINT = 'wiki.page'

    # Used by Flask-Login
    @property
    def LOGIN_DISABLED(self):
        return self.ALLOW_ANON

    # Depreciated variable name
    @property
    def LOCKED(self):
        return self.WIKI_LOCKED_PAGES[:]

    @property
    def SQLALCHEMY_DATABASE_URI(self):
        return self.DB_URI

    @property
    def _url(self):
        return urlparse(self.BASE_URL)

    @property
    def RELATIVE_PATH(self): 
        return self._url.path

    USE_X_SENDFILE = False

    DEBUG = False
    ASSETS_DEBUG = False
    SQLALCHEMY_ECHO = False

    MODULES = ['wiki', 'search', 'auth']

    def __init__(self):
        for k, v in self.read().iteritems():
            setattr(self, k, v)
        if getattr(self, 'AUTH_LOCAL_ENABLE', True):
            self.MODULES.append('auth.local')
        if hasattr(self, 'OAUTH'):
            self.MODULES.append('auth.oauth')
        if hasattr(self, 'LDAP'):
            self.MODULES.append('auth.ldap')
        if in_vagrant():
            self.USE_X_SENDFILE = False
        if self.ENV == "DEV":
            self.DEBUG = True
            self.ASSETS_DEBUG = True
            self.SQLALCHEMY_ECHO = True
            self.USE_X_SENDFILE = False

    def update(self, data):
            conf = self.read()
            conf.update(data)
            return self.save(data)

    def read(self):
        conf = dict()

        for k, v in os.environ.items():
            if k.startswith('REALMS_'):
                conf[k[7:]] = v

        loc = self.get_path()

        if loc:
            with open(loc) as f:
                conf.update(json.load(f))

        if 'BASE_URL' in conf and conf['BASE_URL'].endswith('/'):
            conf['BASE_URL'] = conf['BASE_URL'][:-1]

        for k in ['APP_PATH', 'USER_HOME']:
            if k in conf:
                del conf[k]

        return conf

    def save(self, conf):
        loc = self.get_path(check_write=True)
        with open(loc, 'w') as f:
            f.write(json.dumps(conf, sort_keys=True, indent=4, separators=(',', ': ')).strip() + '\n')
        return loc

    def get_path(self, check_write=False):
        """Find config path
        """
        for loc in os.curdir, os.path.expanduser("~"), "/etc/realms-wiki":
            if not loc:
                continue
            path = os.path.join(loc, "realms-wiki.json")
            if os.path.isfile(path):
                # file exists
                if not check_write:
                    # Don't care if I can write
                    return path

                if os.access(path, os.W_OK):
                    # Has write access, ok!
                    return path
            elif os.path.isdir(loc) and check_write:
                # dir exists file doesn't
                if os.access(loc, os.W_OK):
                    # can write file
                    return path
        return None

conf = Config()