import logging
import time

import tic_device
import tic_standard
import tic_hist

log = logging.getLogger(__name__)

TIC_STX     = b'\x02'
TIC_ETX     = b'\x03'
TIC_SGR     = b'\x0a'
TIC_EGR     = b'\x0d'

TIC_MODE_STD = "standard"
TIC_MODE_HIS = "historique"


type_str = {
    '61': "Compteur monophasé 60 A généralisation Linky G3 - arrivée puissance haute",
    '62': "Compteur monophasé 90 A généralisation Linky G1 - arrivée puissance basse",
    '63': "Compteur triphasé 60 A généralisation Linky G1 - arrivée puissance basse",
    '64': "Compteur monophasé 60 A généralisation Linky G3 - arrivée puissance basse",
    '70': "Compteur monophasé Linky 60 A mise au point G3",
    '71': "Compteur triphasé Linky 60 A mise au point G3",
    '75': "Compteur monophasé 90 A généralisation Linky G3 - arrivée puissance basse",
    '76': "Compteur triphasé 60 A généralisation Linky G3 - arrivée puissance basse",
}

manufacturer_str = {
    "01": "CROUZET / MONETEL",
    "02": "SAGEM / SAGEMCOM",
    "03": "SCHLUMBERGER / ACTARIS / ITRON",
    "04": "LANDIS ET GYR / SIEMENS METERING / LANDIS+GYR",
    "05": "SAUTER / STEPPER ENERGIE France / ZELLWEGER",
    "06": "ITRON",
    "07": "MAEC",
    "08": "MATRA-CHAUVIN ARNOUX / ENERDIS",
    "09": "FAURE-HERMAN",
    "10": "SEVME / SIS",
    "11": "MAGNOL / ELSTER / HONEYWELL",
    "12": "GAZ THERMIQUE",
    "14": "GHIELMETTI / DIALOG E.S. / MICRONIQUE",
    "15": "MECELEC",
    "16": "LEGRAND / BACO",
    "17": "SERD-SCHLUMBERGER",
    "18": "SCHNEIDER / MERLIN GERIN / GARDY",
    "19": "GENERAL ELECTRIC / POWER CONTROL",
    "20": "NUOVO PIGNONE / DRESSER",
    "21": "SCLE",
    "22": "EDF",
    "23": "GDF / GDF-SUEZ",
    "24": "HAGER – GENERAL ELECTRIC",
    "25": "DELTA-DORE",
    "26": "RIZ",
    "27": "ISKRAEMECO",
    "28": "GMT",
    "29": "ANALOG DEVICE",
    "30": "MICHAUD",
    "31": "HEXING ELECTRICAL CO. Ltd",
    "32": "SIAME",
    "33": "LARSEN & TOUBRO Limited",
    "34": "ELSTER / HONEYWELL",
    "35": "ELECTRONIC AFZAR AZMA",
    "36": "ADVANCED ELECTRONIC COMPAGNY Ldt",
    "37": "AEM",
    "38": "ZHEJIANG CHINT INSTRUMENT & METER CO. Ldt",
    "39": "ZIV",
    "70": "LANDIS et GYR (export ou régie)",
    "71": "STEPPER ENERGIE France (export ou régie)",
    "81": "SAGEM / SAGEMCOM",
    "82": "LANDIS ET GYR / SIEMENS METERING / LANDIS+GYR",
    "83": "ELSTER / HONEYWELL",
    "84": "SAGEM / SAGEMCOM",
    "85": "ITRON",
}


class Tic:
    def __init__(self, input):
        self.input = input
        self.device = tic_device.TicDevice(input)
        self.ads = None
        self.device_manufacturer = None
        self.device_year = None
        self.device_model = None
        self.device_serial = None
        self.mode = None
        self._tic = None
        self._cb_ads = None
        self._cb_msg = None

    def set_mode(self, mode):
        if mode == TIC_MODE_STD:
            self.mode = TIC_MODE_STD
            self._tic = tic_standard.TicStandard()
            self.device.set_baudrate(9600)
            log.info(f"set_mode: {self._tic.name()}")
        elif mode == TIC_MODE_HIS:
            self.mode = TIC_MODE_HIS
            self._tic = tic_hist.TicHist()
            self.device.set_baudrate(1200)
            log.info(f"set_mode: {self._tic.name()}")
        else:
            self.mode = None
            self._tic = None
            log.info(f"set_mode: unsupported")

    def detect_mode(self):
        for mode in ( TIC_MODE_STD, TIC_MODE_HIS ):
            self.set_mode(mode)
            f = self.get_frame()
            if not f:
                continue
            groups = self.split_frame(f)
            for group in groups:
                if not self.check_sum(group):
                    continue
                self.decode_group(group)
            if self.ads:
                log.info(f"detected {self._tic.name()}")
                return mode
        log.error("no valid frame detected")
        return None

    def get_frame(self):
        frame = b''
        while True:
            c = self.device.get_char()
            if not c:
                return None
            if c == TIC_STX:
                break
        while True:
            c = self.device.get_char()
            if not c:
                return None
            if c == TIC_ETX:
                break
            frame = frame + c
        return frame

    def split_frame(self, frame):
        groups = []
        start = 0
        while start <= len(frame):
            start = frame.find(TIC_SGR, start)
            if start < 0:
                return groups
            end = frame.find(TIC_EGR, start)
            if end < 0:
                return groups
            groups.append(frame[start+1:end])
            start = end + 1
        return groups

    def check_sum(self, group):
        return self._tic.check_sum(group)

    def decode_group(self, group):
        msg = self._tic.decode_group(group)
        log.debug(f"msg: {msg}")
        if msg and msg.get('label') in ( 'ADSC', 'ADCO' ):
            self.parse_ads(msg['value'])
        return msg

    def parse_ads(self, ads):
        if self.ads != ads:
            self.ads = ads
            self.device_manufacturer = ma = manufacturer_str.get(ads[0:2], "unknown")
            try:
                self.device_year = 2000 + int(ads[2:4])
            except ValueError:
                self.device_year = None
            self.device_model = type_str.get(ads[4:6], "unknown")
            self.device_serial = ads[6:]
            log.info(f"device: {self.ads}")
            log.info(f"manufacturer: {self.device_manufacturer}")
            log.info(f"year: {self.device_year}")
            log.info(f"model: {self.device_model}")
            log.info(f"serial number: {self.device_serial}")
            if self._cb_ads:
                self._cb_ads(self.ads, self.device_manufacturer, self.device_year, self.device_model, self.device_serial)

    def set_callback_ads(self, function):
        self._cb_ads = function
        if self.ads:
            ads = self.ads
            self.ads = None
            self.parse_ads(self.ads)

    def set_callback_msg(self, function):
        self._cb_msg = function

    def run(self):
        while True:
            frame = self.get_frame()
            if not frame:
                return
            groups = self.split_frame(frame)
            for group in groups:
                if not self.check_sum(group):
                    continue
                msg = self.decode_group(group)
                log.info(msg)
                if msg and self._cb_msg:
                    self._cb_msg(msg)
            #if not self.device.is_serial():
            #    time.sleep(1)