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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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import os

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import posixpath

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import sys

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import time

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from functools import wraps

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from importlib import import_module

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import click

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class CLISession(object):

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    def __init__(self, **kwargs):

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        self.__dict__.update(kwargs)

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        self.controller = None

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pass_session = click.make_pass_decorator(CLISession)

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@click.group(chain=True)

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@click.option(

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    "--project-home",

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    envvar="PROJECT_HOME",

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    default=".",

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    metavar="PATH",

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    help="Changes the project folder location.",

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)

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@click.option(

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    "--config",

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    nargs=2,

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    multiple=True,

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    metavar="KEY VALUE",

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    help="Overrides a config key/value pair.",

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)

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@click.option(

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    "--keep", "-k", is_flag=True,

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    help="Keep local runtime, do not kill it after executing commands.",

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)

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@click.option("--verbose", "-v", is_flag=True, help="Enables verbose mode.")

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@click.option(

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    "--buildpath", "-b", help="Where to store files created during build."

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)

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@click.option(

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    "--uri", "-u", help="URI to reach remote PLC."

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)

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@click.version_option("0.1")

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@click.pass_context

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def cli(ctx, **kwargs):

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    """Beremiz CLI manipulates beremiz projects and runtimes. """

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    ctx.obj = CLISession(**kwargs)

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def ensure_controller(func):

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    @wraps(func)

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    def func_wrapper(session, *args, **kwargs):

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        if session.controller is None:

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            session.controller = import_module("CLIController").CLIController(session)

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        ret = func(session, *args, **kwargs)

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        return ret

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    return func_wrapper

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@cli.command()

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@click.option(

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    "--target", "-t", help="Target system triplet."

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)

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@pass_session

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@ensure_controller

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def build(session, target):

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    """Builds project. """

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    def processor():

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        return session.controller.build_project(target)

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    return processor

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@cli.command()

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@pass_session

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@ensure_controller

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def transfer(session):

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    """Transfer program to PLC runtim."""

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    def processor():

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        return session.controller.transfer_project()

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    return processor

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@cli.command()

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@pass_session

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@ensure_controller

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def run(session):

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    """Run program already present in PLC. """

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    def processor():

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        return session.controller.run_project()

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    return processor

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@cli.command()

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@pass_session

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@ensure_controller

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def stop(session):

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    """Stop program running in PLC. """

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    def processor():

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        return session.controller.stop_project()

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    return processor

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@cli.result_callback()

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@pass_session

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def process_pipeline(session, processors, **kwargs):

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    ret = 0

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    for processor in processors:

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        ret = processor()

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        if ret != 0:

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            if len(processors) > 1 :

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                click.echo("Command sequence aborted")

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            break

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    if session.keep:

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        click.echo("Press Ctrl+C to quit")

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        try:

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            while True:

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                session.controller.UpdateMethodsFromPLCStatus()

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                time.sleep(0.5)

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        except KeyboardInterrupt:

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            pass

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    session.controller.finish()

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    return ret

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if __name__ == '__main__':

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    cli()

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