# -*- coding: utf-8 -*-

# Copyright (c) 2012 netzguerilla.net <iro@netzguerilla.net>
#
# This file is part of Iro.
#
# 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 twisted.web import resource, server, http
from twisted.python import log, failure
from twisted.internet import defer

from ..controller.viewinterface import Interface
from ..error import ValidateException

try:
    import json
except ImportError:
    import simplejson as json


class TwistedInterface(Interface):
    """Class that addes needed function for JSON"""
    def __init__(self):
        Interface.__init__(self)

    def listMethods(self):
        """Since we override lookupProcedure, its suggested to override
        listProcedures too.
        """
        return self.listProcedures()


    def listProcedures(self):
        """returns a list of all functions that are allowed to call via XML-RPC."""
        return ['listMethods','status','sms','fax','mail','routes','defaultRoute','bill','telnumber','email']

class MethodFactory(resource.Resource):
    def __init__(self,method,twistedInterface):
        self.method = method
        self.twistedInterface = twistedInterface

    def render(self,request):
        try:
            args = []
            if request.getHeader('Content-Type') == 'application/x-www-form-urlencoded':
                args = {}
                for a in request.args:
                    value = request.args[a]
                    if a != "recipients" and len(value) == 1:
                        value = value[0]
                    args[a] = value
            elif request.getHeader('Content-Type') == 'application/json':
                content = request.content.read()
                if content:
                    args = json.loads(content)
                if args is None:
                    args = []
            else:
                request.setResponseCode(http.NOT_ACCEPTABLE)
                return "Only application/x-www-form-urlencoded or application/json ist allowed for Content-Type"
            if isinstance(args,list):
                d =  defer.maybeDeferred(getattr(self.twistedInterface,self.method),*args)
            else:
                d =  defer.maybeDeferred(getattr(self.twistedInterface,self.method), **args)
            d.addCallback(self._cbRender, request)
            d.addErrback(self._ebRender, request)
            d.addBoth(lambda _: request.finish())
            return server.NOT_DONE_YET
        except Exception:
            log.err(failure.Failure())
            request.setResponseCode(http.INTERNAL_SERVER_ERROR)
            err= {
                    "code" : 999,
                    "msg"  : "Unknown error.",
                }
            request.setHeader('Content-Type', 'application/json')
            return json.dumps({"status":False, "error":err})


    def _cbRender(self,result,request):
        request.setHeader('Content-Type', 'application/json')
        request.write(json.dumps({"status":True, "result":result}))

    def _ebRender(self, failure, request):
        if isinstance(failure.value, ValidateException):
            request.setResponseCode(http.BAD_REQUEST)
        else:
            request.setResponseCode(http.INTERNAL_SERVER_ERROR)

        err= {
                "code" : 999,
                "msg"  : "Unknown error.",
            }

        try:
            err["code"]=failure.value.code
            err["msg"]=failure.value.msg
        except Exception:
            log.err(failure)
            pass
        request.setHeader('Content-Type', 'application/json')
        request.write(json.dumps({"status":False, "error":err}))

class JSONFactory(resource.Resource):
    """JSON factory"""
    def __init__(self):
        resource.Resource.__init__(self)
        self.twistedInterface = TwistedInterface()
        for method in self.twistedInterface.listProcedures():
            self.putChild(method, MethodFactory(method, self.twistedInterface))


def appendResource(root):
    """adding JSON to root."""
    root.putChild('json', JSONFactory())

if __name__ == '__main__':
    from twisted.web import resource
    from twisted.internet import reactor

    root = resource.Resource()
    root = appendResource(root)
    reactor.listenTCP(7080, server.Site(root))
    reactor.run()