"""base class for all params"""
import pprint
import simplejson as json
import sys
import os
from ricky.config import PROBABILITIES_DIR, OFFLINE
import ricky.utils as utils


class Params(object):
    def __init__(self, *args):
        self._url = None
        self._params = tuple(args)

    def __getitem__(self, name):
        """getter for the param by name"""
        for param in self._params:
            if param.name == name:
                return param
        raise ValueError("No param with name %s\n" % name)

    def __str__(self):
        """string representation"""
        return pprint.pformat(self.as_dict())

    def __len__(self):
        return len(self._params)

    def _load_probabilities_json(self, probabilities_file=None):
        filepath = probabilities_file or \
            os.path.join(
                PROBABILITIES_DIR,
                "%s.json" % (self.__class__.__name__)
            )
        return json.load(open(filepath))

    def randomize(
            self,
            probabilities=None,
            probabilities_local=False
            ):
        """assign random values to all params
        if using a probabilities.json file, weight is taken
        into account"""
        if probabilities:
            probabilities_dict = self._load_probabilities_json(probabilities)
        elif probabilities_local:
            probabilities_dict = self._load_probabilities_json()
        else:
            probabilities_dict = {}
        for param in self._params:
            param.randomize(probabilities=probabilities_dict.get(param.name))


    def execute(self):
        """calls the associated api"""
        if OFFLINE:
            sys.path.append("./photoblaster")
            from photoblaster.modules import Pb as _Pb
            from photoblaster.config import LOCAL as PBLOCAL
            for pbcls in _Pb.__subclasses__():
                if pbcls.__name__ == self.__class__.__name__:
                    params_dict = self.as_dict()
                    instance = pbcls(**params_dict)
                    instance.create()
                    if not PBLOCAL:
                        instance.file_s3move()
                    instance.db_send()
                    return instance.file_dict()
        return json.loads(
            utils.http_request(self._url, params=self.as_dict())
        )

    def as_dict(self):
        """displays the params names and values in dictionary form
           used by the api call
        """
        result = {}
        for param in self._params:
            result[param.name] = param.value
        return result

    def as_serialized(self):
        """
        returns params in serialized form to use in a dataset
        """
        return tuple([param.as_normalized() for param in self._params])

    def from_serialized(self, params_tuple):
        """
        sets params from serialized form as acquired from a dataset
        """
        for i in range(len(self._params)):
            self._params[i].from_normalized(params_tuple[i])

    def from_dict(self, params_dict):
        """set param values manually from a dictionary"""
        for param in self._params:
            if param.name in params_dict.keys():
                param.value = params_dict[param.name]

    @classmethod
    def new_class_from_classname(cls, classname):
        """
        #FIXME make this class a plugin parent class
        anything else look weird here?
        """
        for subclass in cls.__subclasses__():
            if subclass.__name__ == classname:
                return subclass()
        return None

from ricky.params.pbgradient import PbGradient
from ricky.params.pbbreaker import PbBreaker
from ricky.params.pbpattern import PbPattern
from ricky.params.pbgrid import PbGrid