from mod_utils import chkDirTree
from mod_db_manager import find_DBs
from mod_elm import ELM
from mod_scan_ecus import ScanEcus
from mod_optfile import optfile
from mod_ecu import ECU
from mod_ecu_state import get_state

from pickle import dump, load

from typing import List

import mod_globals
mod_globals.opt_demo = True

class RenDash:
    def __init__(self, 
                 elm_port, 
                 elm_speed=38400,
                 model_number=58,
                 rescan=False) -> None:
        chkDirTree()
        find_DBs()

        self.elm = ELM(elm_port, elm_speed, "")
        self.lang = optfile("Location/DiagOnCAN_GB.bqm", False)
        self.ecus: List[ECU] = []
        self.current_ecu = None

        if rescan is False:
            try:
                self.ecus = load(open("frozen_ecus.p", "rb"))
            except Exception as e:
                pass
        if not self.ecus:
            ecu_scanner = ScanEcus(self.elm)
            ecu_scanner.chooseModel(model_number)
            ecu_scanner.scanAllEcus()
            for ecu in ecu_scanner.detectedEcus:
                self.ecus.append(ECU(ecu, self.lang.dict))
            dump(self.ecus, open("frozen_ecus.p", "wb+"))

    def get_ecu_names(self):
        return [ecu.ecudata["doc"] for ecu in self.ecus]
    
    def get_ecu_by_doc(self, doc):
        for ecu in self.ecus:
            if ecu.ecudata["doc"] == doc:
                return ecu
    
    def get_ecu_states(self, doc):
        ecu = self.get_ecu_by_doc(doc)
        return ecu.States
    
    def get_ecu_state(self, doc, state):
        ecu = self.get_ecu_by_doc(doc)
        if self.current_ecu is not ecu:
            ecu.initELM(self.elm)
            self.current_ecu = ecu
        datastr, help, csvd = get_state( ecu.States[state], ecu.Mnemonics, ecu.Services, self.elm, ecu.calc)
        return datastr

if __name__ == "__main__":
    rd = RenDash("/dev/tty0")
    print(rd.get_ecu_names())
    while True:
        print(rd.get_ecu_state("UCH_J84_SE_0450_4C_A", "E031"))