import logging
from sys import stderr
from functools import partial

from tornado.ioloop import IOLoop

from tfw.fsm import YamlFSM
from tfw.event_handlers import FSMAwareEventHandler
from tfw.builtins import IdeEventHandler, TerminalEventHandler, FrontendEventHandler
from tfw.builtins import LogMonitoringEventHandler, ProcessManagingEventHandler
from tfw.builtins import DirectorySnapshottingEventHandler, FSMManagingEventHandler
from tfw.main import EventHandlerFactory, setup_signal_handlers
from tfw.logging import Log, Logger, LogFormatter, VerboseLogFormatter
from tfw.config import TFWENV
from tao.config import TAOENV

from custom_event_handlers import MessageFSMStepsEventHandler
from custom_event_handlers import CenatorEventHandler, TestCommandsEventHandler


LOG = logging.getLogger(__name__)


def main():
    # pylint: disable=unused-variable
    Logger([
        Log(stderr, LogFormatter(20)),
        Log(TFWENV.LOGFILE, VerboseLogFormatter())
    ]).start()

    eh_factory = EventHandlerFactory()
    # TFW builtin EventHandlers (required for their respective functionalities)
    # TFW FSM
    fsm_eh = eh_factory.build(FSMManagingEventHandler(
        fsm_type=partial(
            YamlFSM,
            'test_fsm.yml',
            {}  # jinja2 variables, empty dict enables jinja2 without any variables
        )
    ))
    # Web IDE backend
    ide_eh = eh_factory.build(IdeEventHandler(
        allowed_directories=[TFWENV.IDE_WD, TFWENV.WEBSERVICE_DIR],
        directory=TFWENV.IDE_WD,
        exclude=['*.pyc']
    ))
    # Web shell backend
    terminal_eh = eh_factory.build(TerminalEventHandler())
    # Handles 'deploy' button clicks
    processmanager_eh = eh_factory.build(ProcessManagingEventHandler(
        log_tail=2000
    ))
    # Sends live logs of webservice process to frontend
    logmonitor_eh = eh_factory.build(LogMonitoringEventHandler(
        process_name='webservice',
        log_tail=2000
    ))
    # Manages filesystem snapshots of directories
    snapshot_eh = eh_factory.build(DirectorySnapshottingEventHandler(
        directories=[
            TFWENV.IDE_WD,
            TFWENV.WEBSERVICE_DIR
        ]
    ))
    # Proxies frontend API calls to frontend
    frontend_eh = eh_factory.build(FrontendEventHandler())

    # Replace these with your custom event handlers
    # Echoes executed commands to messages
    cenator_eh = eh_factory.build(CenatorEventHandler())
    # Echoes FSM steps
    message_fsm_steps_eh = eh_factory.build(
        MessageFSMStepsEventHandler(),
        event_handler_type=FSMAwareEventHandler
    )
    # Catches special commands
    commands_eh = eh_factory.build(TestCommandsEventHandler(
        bashrc=f'/home/{TAOENV.USER}/.bashrc'
    ))

    setup_signal_handlers()
    IOLoop.instance().start()


if __name__ == '__main__':
    main()