#!/usr/bin/env python3
import pykwalify.core
import yaml,sys,logging,os, pickle, time
from pykwalify.errors import PyKwalifyException,SchemaError

class ConfigPyros:
    # (AKo) : Config file path is checked on the settings file, if the file isn't valid (i.e not found) the error will be launched by the settings file when starting the application 
    devices_links = {}
    current_file = None
    COMPONENT_PATH = os.path.join(os.environ["DJANGO_PATH"],"../../../config/components/")
    GENERIC_DEVICES_PATH = os.path.join(os.environ["DJANGO_PATH"],"../../../config/devices/")
    pickle_file = "obsconfig.p"
    obs_config = None
    devices = None
    computers = None
    agents = None 
    def verify_if_pickle_needs_to_be_updated(self,observatory_config_file)->bool:
        """[summary]

        Args:
            observatory_config_file ([type]): [description]

        Returns:
            bool: [description]
        """
        self.CONFIG_PATH = os.path.dirname(observatory_config_file)+"/"
        if os.path.isfile(self.CONFIG_PATH+self.pickle_file) == False:
            return True
        else:
            pickle_file_mtime = os.path.getmtime(self.CONFIG_PATH+self.pickle_file)
            obs_config_mtime = os.path.getmtime(observatory_config_file)
            if obs_config_mtime > pickle_file_mtime:
                return True
            
            obs_config = self.read_and_check_config_file(observatory_config_file)
            if obs_config == None:
                print(f"Error when trying to read config file (path of config file : {observatory_config_file}")
                return -1
            self.obs_config = obs_config
            # check last date of modification for devices files
            for device in self.obs_config["OBSERVATORY"]["DEVICES"]:
                device_file = self.CONFIG_PATH+device["DEVICE"]["file"]
                device_file_mtime = os.path.getmtime(device_file)
                if device_file_mtime > pickle_file_mtime:
                    return True
                
            for computer in self.obs_config["OBSERVATORY"]["COMPUTERS"]:
                computer_file = self.CONFIG_PATH+computer["COMPUTER"]["file"]
                computer_file_mtime = os.path.getmtime(computer_file)
                if computer_file_mtime > pickle_file_mtime:
                    return True
        return False

    def load(self,observatory_config_file):
        does_pickle_needs_to_be_updated = self.verify_if_pickle_needs_to_be_updated(observatory_config_file)
        if os.path.isfile(self.CONFIG_PATH+self.pickle_file) and does_pickle_needs_to_be_updated == False:
            print("Reading pickle file")
            try:
                can_pickle_file_be_read = False
                while can_pickle_file_be_read != True:
                    if os.access(self.CONFIG_PATH+self.pickle_file, os.R_OK):
                        pickle_dict = pickle.load(open(self.CONFIG_PATH+self.pickle_file,"rb"))
                        can_pickle_file_be_read = True
                    else:
                        time.sleep(0.5)
            except IOError:
                print("Error when reading the pickle file")
                
            self.obs_config = pickle_dict["obs_config"]
            self.computers = pickle_dict["computers"]
            self.devices = pickle_dict["devices"]
            self.devices_links = pickle_dict["devices_links"]
        else:
            print("Pickle file needs to be created or updated")
            pickle_dict = {}
            
            self.obs_config = self.read_and_check_config_file(observatory_config_file) 
            pickle_dict["obs_config"] = self.obs_config
            pickle_dict["devices"] = self.get_devices()
            pickle_dict["computers"] = self.get_computers()
            pickle_dict["devices_links"] = self.devices_links
            print("Writing pickle file")
            pickle.dump(pickle_dict,open(self.CONFIG_PATH+self.pickle_file,"wb"))

    def check_and_return_config(self,yaml_file:str,schema_file:str)->dict:
        """
        Check if yaml_file is valid for the schema_file and return an dictionary of the config file

        Args:
            yaml_file (str): Path to the config_file to be validated
            schema_file (str): Path to the schema file 

        Returns:
            dict: dictionary of the config file (with values)
        """
        # disable pykwalify error to clean the output
        logging.disable(logging.ERROR)
        try:
            can_yaml_file_be_read = False
            while can_yaml_file_be_read != True:
                if os.access(yaml_file, os.R_OK):
                    can_yaml_file_be_read = True
                else:
                    print(f"{yaml_file} can't be accessed, waiting for availability")
                    time.sleep(0.5)
        
            c = pykwalify.core.Core(source_file=yaml_file, schema_files=[schema_file])
            return c.validate(raise_exception=True)
        except SchemaError:
            for error in c.errors:
                print("Error :",str(error).split(". Path")[0])
                print("Path to error :",error.path)
            return None
        except IOError:
            print("Error when reading the observatory config file")

    def read_and_check_config_file(self,yaml_file:str)->dict:
        """
        Read the schema key of the config file to retrieve schema name and proceed to the checking of that config file
        Call check_and_return_config function and print its return.

        Args:
            yaml_file (str): path to the config file
        Returns:
            dict: Dictionary of the config file (with values)
        """
        self.current_file = yaml_file
        try:
            can_config_file_be_read = False
            while can_config_file_be_read != True:
                
                if os.access(yaml_file, os.R_OK):
                    can_config_file_be_read = True
                else:
                    print(f"{yaml_file} can't be accessed, waiting for availability")
                    time.sleep(0.5)
            with open(yaml_file, 'r') as stream:
                print(f"Reading {yaml_file}")
                config_file = yaml.safe_load(stream)

            self.SCHEMA_PATH = os.path.join(os.environ["DJANGO_PATH"],"../../../config/schemas/")
            self.CONFIG_PATH = os.path.dirname(yaml_file)+"/"
            #self.COMPONENT_PATH = os.path.join(os.path.abspath(os.path.dirname(yaml_file)),"../../../config/components/")
            #self.GENERIC_DEVICES_PATH = os.path.join(os.path.abspath(os.path.dirname(yaml_file)),"../../../config/devices/")
            result = self.check_and_return_config(yaml_file,self.SCHEMA_PATH+config_file["schema"])
            if result == None:
                print("Error when reading and validating config file, please check the errors right above")
                exit(1)
            return result

        except yaml.YAMLError as exc:
            print(exc)
        except Exception as e:
            print(e)
            return None
    
    def read_generic_component_and_return_attributes(self,component_name:str)->dict:
        file_path = self.COMPONENT_PATH + component_name + ".yml"
        try:
            with open(file_path, 'r') as stream:
                config_file = yaml.safe_load(stream)  
                
                attributes = {}
                for attribute in config_file:
                
                    attribute = attribute["attribute"]
                    attributes[attribute.pop("key")] = attribute
                return attributes
        except yaml.YAMLError as exc:
            print(exc)
        except Exception as e:
            print(e)
            return None
    
    def read_capability_of_device(self,capability:dict)->dict:
        """
        Read capability of device and inherit attributes from generic component then overwrite attributes defined in device config

        Args:
            capability (dict): dictionary containing a capabilitiy (keys : component and attributes)

        Returns:
            dict: dictionary of capability inherited by generic component and overwritten his attributes by current attributes of capability
        """
        
        component_attributes = self.read_generic_component_and_return_attributes(capability["component"])
        
        attributes = {}
        # get all attributes of device's capability
        for attribute in capability["attributes"]:
            attribute = attribute["attribute"]
        
            attributes[attribute.pop("key")] = attribute
        
        # for each attributes of generic component attributes
        for attribute_name in attributes.keys():
            # merge attributes of general component with specified component in device config file
            new_attributes = {**component_attributes[attribute_name],**attributes[attribute_name]}
            if "is_enum" in component_attributes[attribute_name].keys():
                # make an intersection of both list of values
                new_attributes["value"] = list(set(attributes[attribute_name]["value"]) & set(component_attributes[attribute_name]["value"]))
                if len(new_attributes["value"]) == 0:
                    print(f"Value of lastly read device's attribute '{attribute_name}' isn't one of the values of component configuration for this device (component configuration value(s): {component_attributes[attribute_name]['value']}) (actual value : {attributes[attribute_name]['value']})")
                    exit(1)
            component_attributes[attribute_name] = new_attributes
        
        # return inherited and overwritten attributes of capability
        capability["attributes"] = component_attributes
        return capability



    def get_devices_names_and_file(self)->dict:
        """
        
        Return a dictionary giving the device file name by the device name 
        Returns:
            dict: key is device name, value is file name
        """
        devices_names_and_files = {}
        for device in self.obs_config["OBSERVATORY"]["DEVICES"]:
            device = device["DEVICE"]
            
            devices_names_and_files[device["name"]] = device["file"]
        return devices_names_and_files

    def read_device_config_file(self,config_file_name:str,is_generic=False)->dict:
        """
        Read the device config file, inherit generic device config if "generic" key is present in "DEVICE".
        Associate capabilities of attached_devices if this device has attached_devices.
        Inherit capabilities from generic component and overwritte attributes defined in the device config
        Args:
            config_file_name (str): file name to be read
            is_generic (bool, optional): tells if we're reading a generic configuration (is_generic =True) or not (is_generic = False). Defaults to False.

        Returns:
            dict: formatted device configuration (attributes, capabilities...)
        """
        self.current_file = config_file_name
        devices_name_and_file = self.get_devices_names_and_file()
        if not is_generic:
            # check if device config file is listed in observatory configuration
            current_device_name = [device for device,file_name in devices_name_and_file.items() if file_name in config_file_name[len(self.CONFIG_PATH):] ]
            if len(current_device_name) <= 0:
                print(f"Current file '{config_file_name[len(self.CONFIG_PATH):]}' isn't listed in observatory configuration")
                print("The devices names and files are: ")
                for device_name,file_name in devices_name_and_file.items():
                    print(f"device name: '{device_name}', device filename: '{file_name}'")
                exit(1)
        print(f"Reading {config_file_name}")
        try:
            with open(config_file_name, 'r') as stream:
                config_file = yaml.safe_load(stream)
                # if we're reading a generic device configuration, the path to get the schema is different than usual
                if is_generic:
                    self.SCHEMA_PATH =os.path.join(os.environ["DJANGO_PATH"],"../../../config/schemas/")
                else:
                    self.SCHEMA_PATH = os.path.join(os.environ["DJANGO_PATH"],"../../../config/schemas/")
                
                # read and verify that the device configuration match the schema
                result = self.check_and_return_config(config_file_name,self.SCHEMA_PATH+config_file["schema"])
                # if the configuration didn't match the schema or had an error when reading the file
                if result == None:
                    print("Error when reading and validating config file, please check the errors right above")
                    exit(-1)
                else:
                    # the configuration is valid
                    # storing DEVICE key in device (DEVICE can contains : attributes of device, capabilities, attached devices)
                    device = result["DEVICE"]
                    generic_device_config = None
                    # if the device is associated to an generic configuration, we'll read that generic configuration to inherit his attributes
                    if "generic" in device:
                        # storing the whole current config
                        current_config = result
                        # read and get the generic device config
                        generic_device_config = self.read_device_config_file(self.GENERIC_DEVICES_PATH+device["generic"],is_generic=True)
                        # merge whole device config but we need to merge capabilities differently after
                        new_config = {**generic_device_config["DEVICE"],**current_config["DEVICE"]}
                        result["DEVICE"] = new_config

                    # device has capabilities
                    if "CAPABILITIES" in device:
                        capabilities = []
                        # if the device is associated to a generic device we need to associate his capabilities with the generic capabilities and overwrite them
                        if generic_device_config != None:
                            # we're making a copy of generic device config so we can remove items during loop
                            copy_generic_device_config = generic_device_config.copy()
                            # We have to extend capabilities of generic device configuration
                            for capability in current_config["DEVICE"]["CAPABILITIES"]:
                                is_capability_in_generic_config = False
                                current_config_capability = capability["CAPABILITY"]
                                current_config_component = current_config_capability["component"]
                                # find if this component was defined in generic_device_config
                                for index,generic_config_capability in enumerate(generic_device_config["DEVICE"]["CAPABILITIES"]):
                                    # if the current capability is the capability of the component we're looking for
                                    if current_config_component == generic_config_capability["component"]:
                                        is_capability_in_generic_config = True
                                        # we're merging their attributes
                                        new_attributes = generic_config_capability["attributes"].copy()
                                        attributes = {}
                                        current_config_attributes = current_config_capability["attributes"]                                        
                                        generic_config_attributes = generic_config_capability["attributes"]
                                        for attribute in current_config_attributes:
                                            attribute = attribute["attribute"]
                                            attributes[attribute.pop("key")] = attribute
                                        # for each attributes of device component attributes
                                        for attribute_name in attributes.keys():
                                            # merge attributes of general component with specified component in device config file
                                            new_attributes[attribute_name] = {**generic_config_attributes[attribute_name],**attributes[attribute_name]}
                                            if "is_enum" in generic_config_attributes[attribute_name].keys():
                                                # make an intersection of both list of values
                                                new_attributes[attribute_name]["value"] = list(set(attributes[attribute_name]["value"]) & set(generic_config_attributes[attribute_name]["value"]))
                                                if len(new_attributes[attribute_name]["value"]) == 0:
                                                    print(f"Value of device '{config_file_name}' for attribute '{attribute_name}' isn't one of the values of generic configuration for this device (generic value(s): {generic_config_attributes[attribute_name]['value']}) (actual value : {attributes[attribute_name]['value']})")
                                                    exit(1)
                                        # removing this capability from generic device configuration
                                        generic_device_config["DEVICE"]["CAPABILITIES"].pop(index)
                                        capabilities.append({"component": current_config_component,"attributes":new_attributes}) 
                                        break
                                if is_capability_in_generic_config == False:
                                    current_config_capability = self.read_capability_of_device(current_config_capability)
                                    # the component defined in the current_config isn't defined in generic config (should not happen but we'll deal with that case anyway) : we're simply adding this capability
                                    capabilities.append(current_config_capability)
                            # looping through generic device config's capabilities in order to add them to current device configuration
                            for generic_config_capability in generic_device_config["DEVICE"]["CAPABILITIES"]:
                                capabilities.append(generic_config_capability)
                        else:
                            # device not associated to a generic device configuration
                            for capability in device["CAPABILITIES"]:
                                capability = capability["CAPABILITY"]
                                capabilities.append(self.read_capability_of_device(capability))
                        device["CAPABILITIES"] = capabilities
                        # associate capabilities to final device configuration (stored in result variable)
                        result["DEVICE"]["CAPABILITIES"] = device["CAPABILITIES"]
                    if "ATTACHED_DEVICES" in device.keys():
                        # device has attached devices, we need to read their configuration in order to get their capabilities and add them to the current device
                        devices_name_and_file = self.get_devices_names_and_file()
                        active_devices = self.get_active_devices()
                        for attached_device in device["ATTACHED_DEVICES"]:
                            is_attached_device_link_to_agent = False
                            # we're looking for if the attached device is associated to an agent (i.e. the device is considered as 'active'). However an attached_device shoudn't be active
                            for active_device in active_devices:
                                if devices_name_and_file[active_device] == attached_device["file"]:
                                    # the attached device is an active device (so it's linked to an agent)
                                    is_attached_device_link_to_agent = True
                                    break
                            if self.CONFIG_PATH+attached_device["file"] != config_file_name and not is_attached_device_link_to_agent:
                            # if the attached device isn't the device itself and not active
                                
                                # get configuration of attached device
                                config_of_attached_device = self.read_device_config_file(self.CONFIG_PATH+attached_device["file"])
                                capabilities_of_attached_device = None
                                if "CAPABILITIES" in config_of_attached_device["DEVICE"].keys():
                                    capabilities_of_attached_device = config_of_attached_device["DEVICE"]["CAPABILITIES"]
                                if capabilities_of_attached_device != None:
                                    # get name of device corresponding to the config file name
                                    parent_device_name = [device for device,file_name in devices_name_and_file.items() if file_name == config_file_name[len(self.CONFIG_PATH):]]
                                    attached_device_name = [device for device,file_name in devices_name_and_file.items() if file_name == attached_device["file"]]
                                    if len(parent_device_name) > 0 :
                                        parent_device_name = parent_device_name[0]
                                    else:
                                        print(f"Attached device filename '{config_file_name[len(self.CONFIG_PATH):]}' is not listed in observatory devices files names")
                                        print("The devices names and files are: ")
                                        for device_name,file_name in devices_name_and_file.items():
                                            print(f"device name: '{device_name}', device filename: '{file_name}'")
                                        exit(1)
                                    if len(attached_device_name) > 0 :
                                        attached_device_name = attached_device_name[0]
                                    else:
                                        
                                        print(f"Attached device filename '{attached_device['file']}' is not listed in observatory devices files names")
                                        print("The devices names and files are: ")
                                        for device_name,file_name in devices_name_and_file.items():
                                            print(f"device name: '{device_name}', device filename: '{file_name}'")
                                        exit(1)
                                    # associate attached device to his 'parent' device (parent device is the currently read device)
                                    print(self.devices_links)
                                    self.devices_links[attached_device_name] = parent_device_name
                                    for capability in capabilities_of_attached_device:
                                        # add capabilities of attached device to current device
                                        result["DEVICE"]["CAPABILITIES"].append(capability)
                return result
        except yaml.YAMLError as exc:
            print(exc)
        except Exception as e:
            print(e)
            exit(1)
            #return None

    def __init__(self,observatory_config_file:str) -> None:
        """
        Initiate class with the config file
        set content attribute to a dictionary containing all values from the config file

        Args:
            config_file_name (str): path to the config file
        """
        self.load(observatory_config_file)

   
    def get_obs_name(self)->str:
        """
        Return name of the observatory

        Returns:
            str: Name of the observatory
        """
        return self.obs_config["OBSERVATORY"]["name"]

    def get_channels(self,unit)->dict:
        """
        return dictionary of channels

        Returns:
            dict: [description]
        """
        channels = {}
        
        for channel_id in range(len(unit["TOPOLOGY"]["CHANNELS"])):
            channel = unit["TOPOLOGY"]["CHANNELS"][channel_id]["CHANNEL"]
            channels[channel["name"]] = channel
        return channels
    
    def get_computers(self)->dict:
        """
        return dictionary of computers

        Returns:
            dict: [description]
        """
        if self.computers != None:
            return self.computers
        else:
            computers = {}
            for computer_id in range(len(self.obs_config["OBSERVATORY"]["COMPUTERS"])):
                computer = self.obs_config["OBSERVATORY"]["COMPUTERS"][computer_id]["COMPUTER"]
                if( "file" in computer.keys() ):
                    computer["computer_config"]= self.read_and_check_config_file(self.CONFIG_PATH+computer["file"])["COMPUTER"]
                computers[computer["name"]] = computer
            return computers
    
    def get_devices(self)->dict:
        """
        return dictionary of devices
        
        Returns:
            dict: [description]
        """
        if self.devices != None:
            return self.devices

        else:
            devices = {}
            for device_id in range(len(self.obs_config["OBSERVATORY"]["DEVICES"])):
                device = self.obs_config["OBSERVATORY"]["DEVICES"][device_id]["DEVICE"]
                if( "file" in device.keys() ):
                    device["device_config"] = self.read_device_config_file(self.CONFIG_PATH+device["file"])["DEVICE"]
                devices[device["name"]] = device
            return devices

    def get_devices_names(self)->list:
        """Return the list of devices names of an observatory

        Returns:
            list: list of names of devices
        """
        devices_names = []
        for device in self.obs_config["OBSERVATORY"]["DEVICES"]:
            devices_names.append(device["DEVICE"]["name"])
        return devices_names

    def get_agents(self,unit)->dict:
        """
        return dictionary of agents 

        Returns:
            dict: dictionary of agents. For each agents tell the name, computer, device, protocole, etc...
        """
        if self.agents != None:
            return self.agents
        else:
            agents = {}
            
            
            for agent_id in range(len(unit["AGENTS"])):
                # Agents is a list containing dictionary that have only one key
                key = list(unit["AGENTS"][agent_id].keys())[0]
                agent = unit["AGENTS"][agent_id][key]
                agents[agent["name"]] = agent
            return agents

    def get_channel_groups(self,unit:dict)->dict:
        """
        Return dictionary of channel groups, tell the logic between groups of channels and within a group of channels

        Args:
            unit (dict): dictonary contaning all values of a unit
        Returns:
            dict: dictionary of channel groups (tell the logic and groups of channels)
        """
        info = {}
        info["global_groups_logic"] = unit["TOPOLOGY"]["CHANNEL_GROUPS"]["logic"]
        info["groups"] = {}
        for group_id in range(len(unit["TOPOLOGY"]["CHANNEL_GROUPS"]["GROUPS"])):
            group = unit["TOPOLOGY"]["CHANNEL_GROUPS"]["GROUPS"][group_id]["GROUP"]
            info["groups"][group_id] = group
        return info

    def get_channel_information(self,unit:dict,channel_name:str)->dict:
        """
        Return information of the given channel name of a unit

        Args:
            unit (dict): dictionary representing the unit 
            channel_name (str): name of the channel

        Returns:
            dict: dictionary containing all values that define this channel
        """
        channels = self.get_channels(unit)
        return channels[channel_name]

    def get_topology(self,unit:dict)->dict:
        """
        Return dictionary of the topology of the observatory

        Args:
            unit (dict): dictionary representing the unit
        Returns:
            dict: dictionary representing the topology of an unit (security, mount, channels, channel_groups)
        """
        topology = {}
        for key in unit["TOPOLOGY"].keys():
            branch = unit["TOPOLOGY"][key]
            if key == "CHANNELS":
                topology[key] = self.get_channels(unit)
            elif key == "CHANNEL_GROUPS":
                topology[key] = self.get_channel_groups(unit)
            else:
                topology[key] = branch
        return topology

    def get_active_agents(self,unit:dict)->list:
        """
        Return the list of active agents (i.e. agents that have an association with a device)

        Args:
            unit (dict): dictionary representing the unit

        Returns:
            list: kist of the name of active agents
        """
        return list(self.get_agents(unit).keys())

    def get_units(self)->dict:
        """
        Return all units sort by name defined in the config file

        Returns:
            dict: dictionary giving for a unit_name, his content (name,database,topology,agents,...)
        """
        result = {}
        units = self.obs_config["OBSERVATORY"]["UNITS"]
        for unit in units:
            unit = unit["UNIT"]
            result[unit["name"]] = unit
        return result

    def get_components_agents(self,unit:dict)->dict:
        """
        Return dictionary of component_agents of the given unit

        Args:
            unit (dict): dictionary representing the unit

        Returns:
            dict: dictionary sort by component name giving the associated agent (agent name)
        """
        components_agents = {}
        topology = self.get_topology(unit)
        for element in topology:
            if element in ("SECURITY","MOUNT","CHANNELS"):
                if(element != "CHANNELS"):
                    for component_agent in topology[element]["COMPONENT_AGENTS"]:
                        component_name = list(component_agent.keys())[0]
                        components_agents[component_name] = component_agent[component_name]
                else:
                    for channel in topology[element]:
                        for component_agent in topology[element][channel]["COMPONENT_AGENTS"]:
                            component_name = list(component_agent.keys())[0]
                            components_agents[component_name] = component_agent[component_name]
        return components_agents

    def get_units_name(self)->list:
        """
        Return list of units names 

        Returns:
            [list]: names of units
        """
        return list(self.get_units().keys())

    def get_unit_by_name(self,name:str)->dict:
        """
        Return dictionary containing definition of the unit that match the given name

        Args:
            name (str): name of the unit

        Returns:
            dict: dictonary representing the unit
        """
        return self.get_units()[name]
    
    def get_agents_per_computer(self,unit:dict)->dict:
        """
        Return dictionary that give for each computer, what are the associated agents to it as a list

        Args:
            unit (dict): dictonary representing the unit

        Returns:
            dict:  dictionary that give for each computer, what are the associated agents to it as a list

        """
        agents_per_computer = {}
        agents = self.get_agents(unit)
        for agent in agents:
            computer_name = agents[agent]["computer"]
            if(agents[agent]["computer"] not in agents_per_computer.keys()):
                agents_per_computer[computer_name] = [agent]
            else:
                agents_per_computer[computer_name].append(agent)
        return agents_per_computer


    def get_agents_per_device(self,unit:dict)->dict:
        """
        Return dictionary that give for each device, what are the associated agents to it as a list

        Args:
            unit (dict): dictonary representing the unit

        Returns:
            dict:  dictionary that give for each device, what are the associated agents to it as a list

        """
        agents_per_device = {}
        agents = self.get_agents(unit)
        for agent in agents:
            if("device" in agents[agent].keys()):
                device_name = agents[agent]["device"]
                if device_name in self.get_devices_names():
                    if(agents[agent]["device"] not in agents_per_device.keys()):
                        agents_per_device[device_name] = [agent]
                    else:
                        agents_per_device[device_name].append(agent)
                else:
                    print(f"Error: device name '{device_name}' for agent '{agent}' is not known in the configuration file. The device name must match one of the names defined in the DEVICES section")
                    exit(1)
        return agents_per_device

    def get_active_devices(self)->list:
        """
        Return a list of active device names

        Returns:
            list: list of active device names
        """
        active_devices = []
        for unit_name in self.get_units():
            unit = self.get_unit_by_name(unit_name)
            for device in self.get_agents_per_device(unit):
                active_devices.append(device)
        return active_devices

    def get_active_computers(self)->list:
        """
        Return a list of active computer names

        Returns:
            list: list of active computer names
        """
        active_computers = []
        for unit_name in self.get_units():
            unit = self.get_unit_by_name(unit_name)
            for computer in self.get_agents_per_computer(unit):
                active_computers.append(computer)
        return active_computers

    def get_agent_information(self,unit:dict,agent_name:str)->dict:
        """
        Give the dictionary of attributes of the agent for an unit.

        Args:
            unit (dict): dictonary representing the unit
            agent_name (str): agent name

        Returns:
            dict: dictionary containing attributes of the agent
        """
        return self.get_agents(unit)[agent_name]

    def get_device_information(self,device_name:str)->dict:
        """
        Give the dictionary of the attributes of the device 

        Args:
            device_name (str): device name

        Returns:
            dict: dictionary containing attributes of the device
        """
        return self.get_devices()[device_name]

    def get_database_for_unit(self,unit_name:str)->dict:
        """
        Return dictionary of attributes of the database for an unit

        Args:
            unit_name (str): unit name

        Returns:
            dict: dictionary of attributes of the database for an unit
        """
        return self.get_unit_by_name(unit_name)["DATABASE"]

    def get_device_for_agent(self,unit:dict,agent_name:str)->str:
        """
        Return device name associated to the agent

        Args:
            unit (dict): dictonary representing the unit
            agent_name (str): agent name

        Returns:
            str: device name associated to this agent
        """
        agents_per_device = self.get_agents_per_device(unit)
        for device in agents_per_device:
            if agent_name in agents_per_device[device]:
                return self.get_device_information(device)
    def get_unit_of_computer(self,computer_name:str)->str:
        """
        Return the name of the unit where the computer is used

        Args:
            computer_name (str): computer name

        Returns:
            str: unit name
        """
        for unit_name in self.get_units():
            unit = self.get_unit_by_name(unit_name)
            if(computer_name in self.get_agents_per_computer(unit)):
                return unit_name

    def get_unit_of_device(self,device_name:str)->str:
        """
        Return the name of the unit where the device is used

        Args:
            device_name (str): device name

        Returns:
            str: unit name
        """
        for unit_name in self.get_units():
            unit = self.get_unit_by_name(unit_name)
            if(device_name in self.get_agents_per_device(unit)):
                return unit_name

    def get_device_power(self,device_name:str)->dict:
        """
        Return dictionary that contains informations about power if this information is present in the device config file

        Return None if this information isn't stored in device's config file
        Args:
            device_name (str): name of the device

        Returns:
            dict: informations about power of device
        """
        return self.get_devices()[device_name]["device_config"].get("power")


    def get_device_capabilities(self,device_name:str)->list:
        """
        Return dictionary that contains informations about capabilities if this information is present in the device config file

        Return empty list if this information isn't stored in device's config file
        Args:
            device_name (str): name of the device

        Returns:
            list: list of capabilities of device
        """
        list_of_capabilities = []
        capabilities = self.get_devices()[device_name]["device_config"].get("CAPABILITIES")
        return capabilities

    def get_device_connector(self,device_name:str)->dict:
        """
        Return dictionary that contains informations about connector if this information is present in the device config file

        Return None if this information isn't stored in device's config file
        Args:
            device_name (str): name of the device

        Returns:
            dict: informations about connector of device
        """
        return self.get_devices()[device_name]["device_config"].get("connector")

    def get_computer_power(self,computer_name:str)->dict:
        """
        Return dictionary that contains informations about power if this information is present in the device config file

        Return None if this information isn't stored in device's config file
        Args:
            device_name (str): name of the device

        Returns:
            dict: informations about connector of device
        """
        return self.get_computers()[computer_name]["computer_config"].get("power")


def main():
    config = ConfigPyros("../../../../privatedev/config/tnc/observatory_tnc.yml")
    #print(config.get_devices()["FLI-Kepler4040"]["device_config"])
    #print(config.get_devices()["FLI-Kepler4040"]["device_config"]["CAPABILITIES"][1]["attributes"]["manufacturer"])
    #print(config.get_devices()["FLI-Kepler4040"]["device_config"]["CAPABILITIES"])
    #print(config.get_devices()["AstroMecCA-TM350"]["device_config"]["CAPABILITIES"])
if __name__ == "__main__": 

    main()