import logging
from typing import cast

from eive_tmtc.config.definitions import (
    CFDP_REMOTE_ENTITY_ID,
    PUS_APID,
    CFDP_LOCAL_ENTITY_ID,
)
from eive_tmtc.pus_tc.cmd_demux import handle_pus_procedure
from eive_tmtc.cfdp.handler import CfdpInCcsdsHandler
from tmtccmd import TcHandlerBase, ProcedureWrapper
from cfdppy.defs import CfdpRequestType
from tmtccmd.logging import get_current_time_string
from tmtccmd.logging.pus import RawTmtcTimedLogWrapper
from tmtccmd.tmtc import (
    DefaultPusQueueHelper,
    QueueWrapper,
    FeedWrapper,
    TcProcedureType,
    SendCbParams,
    TcQueueEntryType,
)
from tmtccmd.config.cfdp import generic_cfdp_params_to_put_request
from spacepackets.ecss import PusVerificator
from spacepackets.seqcount import FileSeqCountProvider
from spacepackets.cfdp import PduHolder, DirectiveType


_LOGGER = logging.getLogger(__name__)


class TcHandler(TcHandlerBase):
    def __init__(
        self,
        seq_count_provider: FileSeqCountProvider,
        cfdp_in_ccsds_handler: CfdpInCcsdsHandler,
        pus_verificator: PusVerificator,
        high_level_file_logger: logging.Logger,
        raw_pus_logger: RawTmtcTimedLogWrapper,
        gui: bool,
    ):
        super().__init__()
        self.cfdp_handler_started = False
        self.seq_count_provider = seq_count_provider
        self.pus_verificator = pus_verificator
        self.high_level_file_logger = high_level_file_logger
        self.pus_raw_logger = raw_pus_logger
        self.gui = gui
        self.proxy_op = True
        self.queue_helper = DefaultPusQueueHelper(
            queue_wrapper=QueueWrapper.empty(),
            default_pus_apid=PUS_APID,
            seq_cnt_provider=seq_count_provider,
            pus_verificator=pus_verificator,
            tc_sched_timestamp_len=4,
        )
        self.cfdp_in_ccsds_handler = cfdp_in_ccsds_handler

    def cfdp_done(self) -> bool:
        if self.cfdp_handler_started:
            if (
                not self.cfdp_in_ccsds_handler.put_request_pending()
                and not self.proxy_op
            ):
                self.cfdp_handler_started = False
                return True
        return False

    def feed_cb(self, info: ProcedureWrapper, wrapper: FeedWrapper):
        self.queue_helper.queue_wrapper = wrapper.queue_wrapper
        if info.proc_type == TcProcedureType.DEFAULT:
            handle_pus_procedure(info.to_def_procedure(), self.queue_helper)
        elif info.proc_type == TcProcedureType.CFDP:
            self.handle_cfdp_procedure(info)

    def send_cb(self, send_params: SendCbParams):
        entry_helper = send_params.entry
        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.apid = PUS_APID
                raw_tc = pus_tc_wrapper.pus_tc.pack()
                self.pus_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.high_level_file_logger.info(
                    f"{get_current_time_string(True)}: {tc_info_string}"
                )
                # with open("tc.bin", "wb") as of:
                #    of.write(raw_tc)
                send_params.com_if.send(raw_tc)
            elif entry_helper.entry_type == TcQueueEntryType.CCSDS_TC:
                cfdp_packet_in_ccsds = entry_helper.to_space_packet_entry()
                send_params.com_if.send(cfdp_packet_in_ccsds.space_packet.pack())
                # TODO: Log raw CFDP packets similarly to how PUS packets are logged.
                #        - Log full raw format including space packet wrapper
                #        - Log context information: Transaction ID, and PDU type and directive
                # Could re-use file logger. Should probably do that
                # print(f"sending packet: [{cfdp_packet_in_ccsds.space_packet.pack()}]")
                # with open(f"cfdp_packet_{self.cfdp_counter}", "wb") as of:
                # of.write(cfdp_packet_in_ccsds.space_packet.pack())
                # self.cfdp_counter += 1
        elif entry_helper.entry_type == TcQueueEntryType.LOG:
            log_entry = entry_helper.to_log_entry()
            _LOGGER.info(log_entry.log_str)
            self.high_level_file_logger.info(log_entry.log_str)

    def handle_cfdp_procedure(self, info: ProcedureWrapper):
        cfdp_procedure = info.to_cfdp_procedure()
        if cfdp_procedure.cfdp_request_type == CfdpRequestType.PUT:
            if (
                not self.cfdp_in_ccsds_handler.put_request_pending()
                and not self.cfdp_handler_started
            ):
                put_req_cfg_wrapper = cfdp_procedure.request_wrapper.to_put_request()
                if put_req_cfg_wrapper.cfg.proxy_op:
                    self.proxy_op = True
                put_req = generic_cfdp_params_to_put_request(
                    params=put_req_cfg_wrapper.cfg,
                    local_id=CFDP_LOCAL_ENTITY_ID,
                    remote_id=CFDP_REMOTE_ENTITY_ID,
                    dest_id_proxy_put_req=CFDP_LOCAL_ENTITY_ID,
                )
                _LOGGER.info(
                    f"CFDP: Starting file put request with parameters:\n{put_req}"
                )
                assert put_req is not None
                self.cfdp_in_ccsds_handler.cfdp_handler.put_request(put_req)
                self.cfdp_handler_started = True

                for source_pair, _ in self.cfdp_in_ccsds_handler:
                    if source_pair is not None:
                        pdu, sp = source_pair
                        pdu = cast(PduHolder, pdu)
                        if pdu.is_file_directive:
                            if pdu.pdu_directive_type == DirectiveType.METADATA_PDU:
                                metadata = pdu.to_metadata_pdu()
                                self.queue_helper.add_log_cmd(
                                    "CFDP Source: Sending Metadata PDU for file with size "
                                    f"{metadata.file_size}"
                                )
                            elif pdu.pdu_directive_type == DirectiveType.EOF_PDU:
                                self.queue_helper.add_log_cmd(
                                    "CFDP Source: Sending EOF PDU"
                                )
                        else:
                            fd_pdu = pdu.to_file_data_pdu()
                            self.queue_helper.add_log_cmd(
                                "CFDP Source: Sending File Data PDU for segment at offset "
                                f"{fd_pdu.offset} with length {len(fd_pdu.file_data)}"
                            )
                        self.queue_helper.add_ccsds_tc(sp)
                self.cfdp_in_ccsds_handler.source_handler.state_machine()

    def queue_finished_cb(self, info: ProcedureWrapper):
        if info is not None:
            if info.proc_type == TcQueueEntryType.PUS_TC:
                def_proc = info.to_def_procedure()
                _LOGGER.info(f"Finished queue for command {def_proc.cmd_path}")
            elif info.proc_type == TcProcedureType.CFDP:
                _LOGGER.info("Finished CFDP queue")