# standard imports
import os
import json

# local imports
from .base import (
        Data,
        data_dir,
        )


class Network(Data):

    def __init__(self, path='.', targets=[]):
        super(Network, self).__init__()
        self.references = None
        self.path = path
        self.targets = targets
        self.network_path = os.path.join(self.path, 'network.json')


    def load(self):
        super(Network, self).load()

        f = open(self.network_path, 'r')
        o = json.load(f)
        f.close()

        self.resources = o['resources']

        self.inited = True


    def start(self):
        super(Network, self).load()

        network_template_file_path = os.path.join(data_dir, 'network_template_v{}.json'.format(self.version()))
        
        f = open(network_template_file_path)
        o_part = json.load(f)
        f.close() 
 
        f = open(self.network_path, 'w')
        o = {'resources': {}}
       
        for v in self.targets:
            o['resources'][v] = o_part
            json.dump(o, f)
        f.close()


    def reference(self, k):
        v = self.references.get(k)
        if v  == None:
            raise AttributeError('no defined reference for {}'.format(k))
        return v


    def __str__(self):
        s = ''
        for k in self.resources.keys():
            for kk in self.resources[k].keys():
                v = self.resources[k][kk]
                if v == None:
                    v = ''
                s += '{}.{} = {}\n'.format(k, kk, v)

        return s