import configparser
import socket
import json

from pydoc import locate

IMAGES_FOLDER = '../../src/images'
CONFIG_FILE = "../config/socket_config.ini"
GRAMMAR_FILE = "../config/grammar.json"

class Device():

    """
        Generic class for simulators.
        Initializes the sockets and the grammar, reading the CONFIG_FILE.

        Classes inheriting from it must call the __init__ function with their name (Telescope, CameraVIS, ...)
    """

    def __init__(self, simul_name):

        config = configparser.ConfigParser()
        config.read(CONFIG_FILE)

        ip = config.get(simul_name, "ip")
        port = int(config.get(simul_name, "port"))

        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.sock.bind((ip, port))
        self.sock.listen(122)

        self.set_msgs = []
        self.get_msgs = []
        self.do_msgs = []

        self.enums = {}

        with open(GRAMMAR_FILE) as grammar_file:

            grammar = json.load(grammar_file)

        enums = grammar["Enums"]

        for enum in enums :
            self.enums[enum] = enums[enum]

        if simul_name[:6] == "Camera":
            device = grammar["Camera"]

            for item in device["set"]:

                param_type = item["param_type"]
                if len(param_type) < 4 or param_type[:4] != "Enum":
                    ''' This transforms 'int' string to <int> type '''
                    param_type = locate(param_type)
                self.set_msgs.append((item["name"], item["nb_param"], param_type))

            for item in device["get"]:
                self.get_msgs.append(item)
            for item in device["do"]:

                param_type = item["param_type"]
                if len(param_type) < 4 or param_type[:4] != "Enum":
                    param_type = locate(param_type)
                self.do_msgs.append((item["name"], item["nb_param"], param_type))

        device = grammar[simul_name]

        for item in device["set"]:

            param_type = item["param_type"]
            if len(param_type) < 4 or param_type[:4] != "Enum":
                param_type = locate(param_type)
            self.set_msgs.append((item["name"], item["nb_param"], param_type))

        for item in device["get"]:
            self.get_msgs.append(item)
        for item in device["do"]:

            param_type = item["param_type"]
            if len(param_type) < 4 or param_type[:4] != "Enum":
                param_type = locate(param_type)
            self.do_msgs.append((item["name"], item["nb_param"], param_type))