import os
import sys
import json

DEBUG_FILE = False
PACKAGE_PARENT = '..'
SCRIPT_DIR = os.path.dirname(os.path.realpath(os.path.join(os.getcwd(), os.path.expanduser(__file__))))
sys.path.append(os.path.normpath(os.path.join(SCRIPT_DIR, PACKAGE_PARENT)))

from utils.Device import Device
from utils.StatusManager import StatusManager


class PLCSimulator(Device, StatusManager):
    status = {
        "name": "STATUS", "from": "Beckhoff", "version_firmware": "20170809", "site": "OSM-Mexico",
        "date": "2017-03-03T13:45:00",
        "device": [{"name": "WXT520", "type": "meteo", "serial_number": "14656423", "valid": "yes",
                    "values": [
                        {"name": "OutsideTemp", "value": 12.12, "unit": "Celcius", "comment": ""},
                        {"name": "OutsideHumidity", "value": 64.1, "unit": "percent", "comment": ""},
                        {"name": "Pressure", "value": 769.2, "unit": "mbar", "comment": "At site elevation"},
                        {"name": "RainRate", "value": 0.0, "unit": "mm/h", "comment": ""},
                        {"name": "WindSpeed", "value": 3.1, "unit": "m/s", "comment": ""},
                        {"name": "WindDir", "value": 202.3, "unit": "deg", "comment": "(N=0, E=90)"},
                        {"name": "DewPoint", "value": 8.3, "unit": "deg", "comment": ""}
                    ]
                    },
                   {"name": "DRD11", "type": "meteo", "serial_number": "RET6789", "valid": "yes",
                    "values": [
                        {"name": "analog", "value": 2.345, "unit": "V", "comment": "3V=Dry <2.5V=Rain"},
                        {"name": "digital", "value": 1, "unit": "bool", "comment": "1=Dry 0=Rain"}
                    ]
                    },
                   {"name": "VantagePro", "type": "meteo", "serial_number": "ERTRY2344324", "valid": "no",
                    "values": [
                        {"name": "OutsideTemp", "value": 12.45, "unit": "Celcius", "comment": ""},
                        {"name": "InsideTemp", "value": 20.28, "unit": "Celcius", "comment": ""},
                        {"name": "OutsideHumidity", "value": 65.3, "unit": "percent", "comment": ""},
                        {"name": "InsideHumidity", "value": 45.6, "unit": "percent", "comment": ""},
                        {"name": "Pressure", "value": 768.7, "unit": "mbar", "comment": "At site elevation"},
                        {"name": "RainRate", "value": 0.0, "unit": "mm/h", "comment": ""},
                        {"name": "WindSpeed", "value": 2.8, "unit": "m/s", "comment": ""},
                        {"name": "WindDir", "value": 207.0, "unit": "deg", "comment": "(N=0, E=90)"},
                        {"name": "WindDirCardinal", "value": "SW", "unit": "string", "comment": ""},
                        {"name": "DewPoint", "value": 8.5, "unit": "deg", "comment": ""}
                    ]
                    },
                   {"name": "MLX90614-1", "type": "meteo", "serial_number": "Unknown", "valid": "yes",
                    "values": [
                        {"name": "SensorTemperature", "value": 23.56, "unit": "Celcius", "comment": ""},
                        {"name": "SkyTemperature", "value": -15.67, "unit": "Celcius",
                         "comment": "Clear<-10 VeryCloudy>4"}
                    ]
                    },
                   {"name": "LAMP_FLAT_CAGIRE", "type": "calib", "serial_number": "REF_3434", "valid": "yes",
                    "values": [
                        {"name": "status", "value": "on", "unit": "string", "comment": "on or off"},
                        {"name": "current", "value": 0.234, "unit": "Ampere", "comment": ""}
                    ]
                    },
                   {"name": "LAMP FLAT CAGIRE", "type": "calib", "serial_number": "REF_3434", "valid": "yes",
                    "values": [
                        {"name": "status", "value": "on", "unit": "string", "comment": "on or off"},
                        {"name": "current", "value": 0.234, "unit": "Ampere", "comment": ""}
                    ]
                    }
                   ]
    }

    list = {"name": "LIST", "from": "Beckhoff", "version_firmware": "20170809", "site": "OSM-Mexico",
            "date": "2017-03-03T13:42:46",
            "command": [
                {"name": "LIST", "type": "",
                 "parameters": ""
                 },
                {"name": "SATUS", "type": "",
                 "parameters": ""
                 },
                {"name": "LAMP_FLAT_CAGIRE", "type": "calib",
                 "parameters": [
                     {"name": "value", "unit": "string", "comment": "on or off", "default": ""},
                     {"name": "current", "unit": "Ampere", "comment": "", "default": "0.345"}
                 ]
                 }
            ]
            }

    def __init__(self, argv):
        super().__init__(argv)
        self.setDevice("PLC")
        self.setStatusManager("plcSimulator", argv)

    def plcPrint(self, string: str):
        if DEBUG_FILE:
            print("PLCSimulator : " + string)

    def updateStatus(self, i: int):
        for dic in self.sims:
            if (int(dic["time"]) == i):
                change = dic[self.status_name]
                device_name = change["device_name"]
                devices = self.status["device"]
                for device in devices:
                    if device["name"] == device_name:
                        values = device["values"]
                        for value in values:
                            if value["name"] == change["value_name"]:
                                value["value"] = change["value"]
        return 0


    def handleConnections(self):
        for co in self.connections:
            data = self.readBytes(1024, co)
            answer = "["
            count = False
            json_array = json.loads(data)
            command_list = json_array["command"]
            for command in command_list:
                if command["name"] == "STATUS":
                    if count:
                        answer += ','
                    answer += json.dumps(self.status)
                    count = True
                elif command["name"] == "LIST":
                    if count:
                        answer += ','
                    answer += json.dumps(self.status)
                    count = True
                else:
                    print("command received by PLC simulator : [>>> "+ str(command["name"]) + " <<<] unknown")
            answer += ']'
            if len(answer) > 0 and answer != "[]":
                self.sendMessage(answer, co)
        return (0)

    def loop(self):
        i = 0

        if (self.ended == 0):
            self.plcPrint("Not entry for telescope found in config file : " + self.config_file)
            return (0)
        while (True):
            self.updateStatus(i)
            if (self.isConnected()):
                self.handleConnections()
            i += 1
            if (i > self.ended):
                return (0)
        return (1)

    def run(self):
        if DEBUG_FILE:
            print("PLC simulator running")
        self.parse()
        self.configSocket()
        self.loop()
        return (0)


if __name__ == "__main__":
    sim = PLCSimulator(sys.argv)
    sim.run()