from xml.etree import ElementTree

class Network():
    """A simple network definition"""
    
    def __init__(self):
        self.name = ""
        self.domains = []
        self.admins = []
        self.ip_blocks = []
        self.data = {}

class Domain():
    """A simple domain definition"""

    def __init__(self):
        self.name = ""
        self.admins = []
        self.data = {}

    def add_admin(self, admin):
        """Add an administrator for this network"""

        self.admins.append(admin)

class Person():
    """A simple person definition"""

    def __init__(self):
        self.name = ""
        self.surname = ""
        self.email = ""
        self.data = {}

class Data():
    """Abstract class for storing and getting information"""
    
    def __init__(self, config):
        self.config = config
        self.networks = []
        self.domains = []
        self.persons = []

    def parse_config(self):
        """Parse neccesary config params depending on the method used

        Abstract method"""
        
        pass
    
    def load_data(self):
        """Load data from defined source.

        Abstract method"""
        
        pass

    def get_networks(self):
        """Return all networks. Common method for all kind of storages."""
        
        if self.networks == None:
            self.load_data()

        return self.networks

    def get_domains(self):
        """Return all domains. Common method for all kind of storages."""
        
        if self.networks == None:
            self.load_data()

        return self.domains

    def get_persons(self):
        """Return all persons. Common method for all kind of storages."""
        
        if self.persons == None:
            self.load_data()

        return self.persons

class DataXML(model.Data):
    """Reads network information from a XML file"""
    
    def parse_config(self):
        """Reads and sets up XML config file fields"""
        
        self.data_file = self.config['Storage']['xml_file']
        
    def load_data(self):
        """Parse XML for getting network information"""

        root = ElementTree(file=self.data_file).getroot()
        
        for elem in root:
            if elem.tag == 'person':
                self.add_person(elem)
            elif elem.tag == 'domain':
                self.add_domain(elem)
            elif elem.tag == 'network':
                self.add_network(elem)
            else:
                pass # raise TagNotFoundError

    def add_person(self, elem):
        """Adds a new person"""

        person = model.Person()
        for e in elem:
            if e.tag == 'name':
                person.name = e.text
            elif e.tag == 'surname':
                person.surname = e.text
            elif e.tag == 'email':
                person.email = e.text
            else:
                person.data[e.tag] = e.text

        self.persons[elem.attrib['id']] = person

    def add_domain(self, elem):
        """Adds a new domain"""

        domain = model.Domain()
        for e in elem:
            if e.tag == 'name':
                domain.name == e.text
            else:
                domain.data[e.tag] = e.text

        self.domains[elem.attrib['id']] = domain                

    def add_network(self, elem):
        """Adds a new network"""
        
        network = model.Network()
        for e in elem:
            if e.tag == 'name':
                network.name = e.text
            elif e.tag == 'domain':
                network.domains.append(e.text)            
            elif e.tag == 'ip_block':
                network.ip_blocks.append(e.text)
            elif e.tag == 'admin':
                network.admins.append(e.text)
            else:
                network.data[e.tag] = e.text
                
        self.networks[elem.attrib['id']] = network