#!/usr/bin/env python3
import logging
import sys
import time
import traceback

from tmtccmd.util import FileSeqCountProvider, PusFileSeqCountProvider
from tmtccmd.util.tmtc_printer import FsfwTmTcPrinter

try:
    import spacepackets
except ImportError as error:
    print(error)
    print("Python spacepackets module could not be imported")
    print(
        'Install with "cd spacepackets && python3 -m pip intall -e ." for interative installation'
    )
    sys.exit(1)

try:
    import tmtccmd
except ImportError as error:
    run_tmtc_commander = None
    initialize_tmtc_commander = None
    tb = traceback.format_exc()
    print(tb)
    print("Python tmtccmd submodule could not be imported")
    sys.exit(1)

from spacepackets.ecss import PusVerificator
from tmtccmd import get_console_logger, TcHandlerBase, BackendBase
from tmtccmd.com_if import ComInterface

from tmtccmd.logging.pus import (
    RawTmtcTimedLogWrapper,
    RegularTmtcLogWrapper,
    TimedLogWhen,
)
from tmtccmd.pus import VerificationWrapper
from tmtccmd.tm import SpecificApidHandlerBase, GenericApidHandlerBase, CcsdsTmHandler
from tmtccmd.core import BackendRequest
from tmtccmd.logging import get_current_time_string
from tmtccmd.tc import (
    ProcedureHelper,
    FeedWrapper,
    TcProcedureType,
    QueueEntryHelper,
    TcQueueEntryType,
)
from tmtccmd.config import default_json_path, SetupWrapper
from tmtccmd.config.args import (
    SetupParams,
    ArgParserWrapper,
)
from config import __version__
from config.definitions import PUS_APID
from config.hook import EiveHookObject
from pus_tm.factory_hook import pus_factory_hook
from pus_tc.procedure_packer import handle_default_procedure

LOGGER = get_console_logger()


class PusHandler(SpecificApidHandlerBase):
    def __init__(
        self,
        wrapper: VerificationWrapper,
        printer: FsfwTmTcPrinter,
        raw_logger: RawTmtcTimedLogWrapper,
    ):
        super().__init__(PUS_APID, None)
        self.printer = printer
        self.verif_wrapper = wrapper
        self.raw_logger = raw_logger

    def handle_tm(self, packet: bytes, _user_args: any):
        pus_factory_hook(packet, self.verif_wrapper, self.printer, self.raw_logger)


class UnknownApidHandler(GenericApidHandlerBase):
    def handle_tm(self, apid: int, _packet: bytes, _user_args: any):
        LOGGER.warning(f"Packet with unknwon APID {apid} detected")


class TcHandler(TcHandlerBase):
    def __init__(
        self,
        seq_count_provider: FileSeqCountProvider,
        pus_verificator: PusVerificator,
        file_logger: logging.Logger,
        raw_logger: RawTmtcTimedLogWrapper,
        gui: bool
    ):
        super().__init__()
        self.seq_count_provider = seq_count_provider
        self.pus_verificator = pus_verificator
        self.file_logger = file_logger
        self.raw_logger = raw_logger
        self.gui = gui

    def feed_cb(self, info: ProcedureHelper, wrapper: FeedWrapper):
        if info.proc_type == TcProcedureType.DEFAULT:
            handle_default_procedure(info.to_def_procedure(), wrapper, self.gui)

    def send_cb(self, entry_helper: QueueEntryHelper, com_if: ComInterface):
        if entry_helper.is_tc:
            if entry_helper.entry_type == TcQueueEntryType.PUS_TC:
                pus_tc_wrapper = entry_helper.to_pus_tc_entry()
                pus_tc_wrapper.pus_tc.seq_count = (
                    self.seq_count_provider.get_and_increment()
                )
                pus_tc_wrapper.pus_tc.apid = PUS_APID
                # Add TC after Sequence Count stamping
                self.pus_verificator.add_tc(pus_tc_wrapper.pus_tc)
                raw_tc = pus_tc_wrapper.pus_tc.pack()
                self.raw_logger.log_tc(pus_tc_wrapper.pus_tc)
                tc_info_string = f"Sent {pus_tc_wrapper.pus_tc}"
                LOGGER.info(tc_info_string)
                self.file_logger.info(
                    f"{get_current_time_string(True)}: {tc_info_string}"
                )
                com_if.send(raw_tc)
        elif entry_helper.entry_type == TcQueueEntryType.LOG:
            log_entry = entry_helper.to_log_entry()
            LOGGER.info(log_entry.log_str)
            self.file_logger.info(log_entry.log_str)

    def queue_finished_cb(self, info: ProcedureHelper):
        if info is not None and info.proc_type == TcQueueEntryType.PUS_TC:
            def_proc = info.to_def_procedure()
            LOGGER.info(
                f"Finished queue for service {def_proc.service} and op code {def_proc.op_code}"
            )


def setup_params() -> SetupWrapper:
    print(f"-- eive tmtc v{__version__} --")
    print(f"-- spacepackets v{spacepackets.__version__} --")
    hook_obj = EiveHookObject(default_json_path())
    params = SetupParams()
    parser_wrapper = ArgParserWrapper(hook_obj)
    parser_wrapper.parse()
    tmtccmd.init_printout(parser_wrapper.use_gui)
    parser_wrapper.set_params(params)
    params.apid = PUS_APID
    setup_wrapper = SetupWrapper(hook_obj=hook_obj, setup_params=params)
    return setup_wrapper


def setup_tmtc(
    verificator: PusVerificator,
    printer: FsfwTmTcPrinter,
    raw_logger: RawTmtcTimedLogWrapper,
    gui: bool
) -> (CcsdsTmHandler, TcHandler):
    verification_wrapper = VerificationWrapper(verificator, LOGGER, printer.file_logger)
    pus_handler = PusHandler(verification_wrapper, printer, raw_logger)
    ccsds_handler = CcsdsTmHandler(generic_handler=UnknownApidHandler(None))
    ccsds_handler.add_apid_handler(pus_handler)
    seq_count_provider = PusFileSeqCountProvider()
    tc_handler = TcHandler(
        seq_count_provider=seq_count_provider,
        pus_verificator=verificator,
        file_logger=printer.file_logger,
        raw_logger=raw_logger,
        gui=gui
    )
    return ccsds_handler, tc_handler


def setup_backend(
    setup_wrapper: SetupWrapper,
    tc_handler: TcHandler,
    ccsds_handler: CcsdsTmHandler,
) -> BackendBase:
    tmtc_backend = tmtccmd.create_default_tmtc_backend(
        setup_wrapper=setup_wrapper, tm_handler=ccsds_handler, tc_handler=tc_handler
    )
    tmtccmd.start(tmtc_backend=tmtc_backend, hook_obj=setup_wrapper.hook_obj)
    return tmtc_backend


def main():
    try:
        setup_wrapper = setup_params()
    except KeyboardInterrupt as e:
        LOGGER.info(f"{e}. Exiting")
        sys.exit(0)
    tmtc_logger = RegularTmtcLogWrapper()
    printer = FsfwTmTcPrinter(tmtc_logger.logger)
    raw_logger = RawTmtcTimedLogWrapper(when=TimedLogWhen.PER_HOUR, interval=2)
    pus_verificator = PusVerificator()
    ccsds_handler, tc_handler = setup_tmtc(
        pus_verificator, printer, raw_logger, setup_wrapper.params.use_gui
    )

    tmtccmd.setup(setup_wrapper)
    tmtc_backend = setup_backend(
        setup_wrapper=setup_wrapper, ccsds_handler=ccsds_handler, tc_handler=tc_handler
    )
    try:
        while True:
            state = tmtc_backend.periodic_op(None)
            if state.request == BackendRequest.TERMINATION_NO_ERROR:
                sys.exit(0)
            elif state.request == BackendRequest.DELAY_IDLE:
                LOGGER.info("TMTC Client in IDLE mode")
                time.sleep(3.0)
            elif state.request == BackendRequest.DELAY_LISTENER:
                time.sleep(0.8)
            elif state.request == BackendRequest.DELAY_CUSTOM:
                time.sleep(state.next_delay.total_seconds())
            elif state.request == BackendRequest.CALL_NEXT:
                pass
    except KeyboardInterrupt:
        sys.exit(0)


if __name__ == "__main__":
    main()