#!/usr/bin/env python

"""

Copyright (C) 2019-2020 Vanessa Sochat.

This Source Code Form is subject to the terms of the
Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed
with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

"""

from watchme.logger import bot
from watchme.defaults import WATCHME_WATCHER, WATCHME_TASK_TYPES, WATCHME_DEFAULT_TYPE
import watchme
import argparse
import sys
import os


def get_parser():
    parser = argparse.ArgumentParser(description="WatchMe Command Line Tool")

    # Global Variables

    parser.add_argument(
        "--debug",
        dest="debug",
        help="use verbose logging to debug.",
        default=False,
        action="store_true",
    )

    parser.add_argument(
        "--version",
        dest="version",
        help="show version and exit.",
        default=False,
        action="store_true",
    )

    parser.add_argument(
        "--quiet",
        dest="quiet",
        help="suppress additional output.",
        default=False,
        action="store_true",
    )

    parser.add_argument(
        "--watcher",
        dest="watcher",
        help="the watcher to create (defaults to watcher)",
        default=None,
        type=str,
    )

    parser.add_argument(
        "--base",
        dest="base",
        help="the watcher base (defaults to $HOME/.watchme)",
        default=None,
        type=str,
    )

    description = "actions for WatchMe Command Line Tool"

    subparsers = parser.add_subparsers(
        help="watchme actions", title="actions", description=description, dest="command"
    )

    # init

    init = subparsers.add_parser("init", help="initialize watchme")

    init.add_argument(
        "--empty",
        dest="create_empty",
        help="don't create the default watcher folder",
        default=False,
        action="store_true",
    )

    # get

    get = subparsers.add_parser(
        "get", help="get a watcher repository or task using git"
    )

    get.add_argument("repo", nargs=1, help="the repository url to clone")

    get.add_argument(
        "--force",
        dest="force",
        help="force overwrite a watcher, if already exists.",
        default=False,
        action="store_true",
    )

    # export

    export = subparsers.add_parser(
        "export", help="export data for a task and result file"
    )

    export.add_argument("watcher", nargs=1, help="the watcher export data from")

    export.add_argument(
        "task", nargs=1, help="the name of the task to export data from"
    )

    export.add_argument(
        "filename", nargs=1, help="the filename in the task folder to export"
    )

    export.add_argument(
        "--force",
        dest="force",
        help="force overwrite output, if already exists.",
        default=False,
        action="store_true",
    )

    export.add_argument(
        "--json",
        dest="json",
        help="signal to load the file as json",
        default=False,
        action="store_true",
    )

    export.add_argument(
        "--out",
        dest="out",
        help="the output file (json) to export the data",
        default=None,
    )

    # create

    create = subparsers.add_parser("create", help="create a new watcher")

    create.add_argument(
        "watchers", nargs="*", help="watchers to create (default: single watcher)"
    )

    # add

    add = subparsers.add_parser("add-task", help="add a task to a watcher.")

    add.add_argument("watcher", nargs=1, help="the watcher to add to")

    add.add_argument(
        "task", nargs=1, help="the name of the task to add. Must start with task"
    )

    add.add_argument(
        "--type",
        dest="watcher_type",
        choices=WATCHME_TASK_TYPES,
        default=WATCHME_DEFAULT_TYPE,
    )

    add.add_argument(
        "--active", dest="active", choices=["true", "false"], default="true"
    )

    add.add_argument(
        "--force",
        dest="force",
        help="force overwrite a task, if already exists.",
        default=False,
        action="store_true",
    )

    # inspect

    inspect = subparsers.add_parser("inspect", help="inspect a task or watcher")

    inspect.add_argument("watcher", nargs=1, help="the watcher to inspect")

    inspect.add_argument(
        "--add-command",
        dest="create_command",
        help="print the command used to add a a task.",
        default=False,
        action="store_true",
    )

    # list

    ls = subparsers.add_parser("list", help="list all watchers at a base")

    ls.add_argument(
        "--watchers",
        dest="watchers",
        help="list watchers available",
        default=False,
        action="store_true",
    )

    # monitor

    monitor = subparsers.add_parser(
        "monitor", help="terminal process monitor (akin to time)"
    )

    monitor.add_argument(
        "watcher", nargs="?", help="the watcher to run (if save desired)"
    )

    monitor.add_argument(
        "--name",
        dest="name",
        help="a custom name for the output folder (decorator-<name>)",
        default=None,
        type=str,
    )

    monitor.add_argument(
        "--func",
        dest="func",
        choices=["monitor_pid_task", "gpu_task"],
        help="the function to run (defualts to psutils monitor_pid_task",
        default="monitor_pid_task",
        type=str,
    )

    monitor.add_argument(
        "--skip", dest="skip", help="keys in result to skip", default=None, type=str
    )

    monitor.add_argument(
        "--only", dest="only", help="only include these values", default=None, type=str
    )

    monitor.add_argument(
        "--include",
        dest="include",
        help="keys in result to add back in (environ)",
        default=None,
        type=str,
    )

    monitor.add_argument(
        "--seconds",
        "-s",
        dest="seconds",
        help="interval (seconds) to monitor at",
        default=3,
        type=int,
    )

    monitor.add_argument(
        "--test",
        dest="test",
        help="run monitor in test mode (for a decorator, no save)",
        default=False,
        action="store_true",
    )

    # protect and freeze

    protect = subparsers.add_parser("protect", help="protect or freeze a watcher.")

    protect.add_argument("watcher", nargs=1, help="the watcher to protect or freeze")

    protect.add_argument(
        "action", default="on", choices=["on", "off", "freeze", "unfreeze"]
    )

    # remove

    remove = subparsers.add_parser("remove", help="remove a task or entire watcher.")

    remove.add_argument("watcher", nargs=1, help="the watcher to remove tasks from")

    remove.add_argument(
        "--delete",
        dest="delete",
        help="delete the entire watch repository",
        default=False,
        action="store_true",
    )

    # run

    run = subparsers.add_parser("run", help="run a watcher.")

    run.add_argument("watcher", nargs=1, help="the watcher to run")

    run.add_argument(
        "--serial",
        dest="serial",
        help="run tasks in serial",
        default=False,
        action="store_true",
    )

    run.add_argument(
        "--test",
        dest="test",
        help="run tasks in test mode (no save)",
        default=False,
        action="store_true",
    )

    run.add_argument(
        "--no-progress",
        dest="no_progress",
        help="run tasks in serial",
        default=False,
        action="store_true",
    )

    # activate

    activate = subparsers.add_parser("activate", help="activate a new watcher")

    activate.add_argument(
        "watcher", nargs=1, help="watcher to activate (optionally add tasks)"
    )

    # deactivate

    deactivate = subparsers.add_parser("deactivate", help="deactivate a watcher")

    deactivate.add_argument(
        "watcher", nargs=1, help="watcher to deactivate (optionally add tasks)"
    )

    # schedule

    schedule = subparsers.add_parser("schedule", help="schedule your watcher.")

    schedule.add_argument("watcher", nargs=1, help="the watcher to schedule")

    schedule.add_argument(
        "--force",
        dest="force",
        help="force overwrite of a schedule, if exists.",
        default=False,
        action="store_true",
    )

    # edit

    edit = subparsers.add_parser("edit", help="edit a watcher task.")

    edit.add_argument("watcher", nargs=1, help="the watcher to edit")

    edit.add_argument(
        "action",
        nargs=1,
        help="the action to take",
        choices=["add", "update", "remove"],
    )

    edit.add_argument("task", nargs=1, help="the task to edit.")

    return parser


def main():
    """the main entry point for the WatchMe Command line application.
    """

    # Customize parser

    parser = get_parser()

    def help(return_code=0):
        """print help, including the software version and active client 
           and exit with return code.
        """

        version = watchme.__version__

        bot.custom(
            message="Command Line Tool v%s" % version,
            prefix="\n[WatchMe] ",
            color="CYAN",
        )

        parser.print_help()
        sys.exit(return_code)

    # If the user didn't provide any arguments, show the full help
    if len(sys.argv) == 1:
        help()
    try:
        args, unknown = parser.parse_known_args()
    except:
        sys.exit(0)

    extras = None
    if len(unknown) > 0:
        extras = unknown

    # if environment logging variable not set, make silent

    if args.debug is False:
        os.environ["MESSAGELEVEL"] = "INFO"

    # Show the version and exit
    if args.version is True:
        print(watchme.__version__)
        sys.exit(0)

    if args.command == "activate":
        from .activate import main
    elif args.command == "add-task":
        from .add import main
    elif args.command == "edit":
        from .edit import main
    elif args.command == "export":
        from .export import main
    elif args.command == "create":
        from .create import main
    elif args.command == "deactivate":
        from .deactivate import main
    elif args.command == "get":
        from .get import main
    elif args.command == "init":
        from .init import main
    elif args.command == "inspect":
        from .inspect import main
    elif args.command == "list":
        from .ls import main
    elif args.command == "monitor":
        from .monitor import main
    elif args.command == "protect":
        from .protect import main
    elif args.command == "remove":
        from .remove import main
    elif args.command == "run":
        from .run import main
    elif args.command == "schedule":
        from .schedule import main
    else:
        help()

    # Pass on to the correct parser
    return_code = 0
    try:
        main(args, extras)
        sys.exit(return_code)
    except UnboundLocalError:
        return_code = 1

    help(return_code)


if __name__ == "__main__":
    main()
