# Copyright (c) 2017 crocoite contributors
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

"""
Command line interface
"""

import argparse, json, sys, signal
from enum import IntEnum

from . import behavior
from .controller import SinglePageController, defaultSettings, \
        ControllerSettings, StatsHandler, LogHandler
from .browser import NullService, ChromeService, BrowserCrashed
from .warc import WarcHandler
from .logger import Logger, JsonPrintConsumer, DatetimeConsumer, WarcHandlerConsumer

class SingleExitStatus(IntEnum):
    """ Exit status for single-shot command line """
    Ok = 0
    Fail = 1
    BrowserCrash = 2

def single ():
    parser = argparse.ArgumentParser(description='Save website to WARC using Google Chrome.')
    parser.add_argument('--browser', help='DevTools URL', metavar='URL')
    parser.add_argument('--timeout', default=1*60*60, type=int, help='Maximum time for archival', metavar='SEC')
    parser.add_argument('--idle-timeout', default=30, type=int, help='Maximum idle seconds (i.e. no requests)', dest='idleTimeout', metavar='SEC')
    parser.add_argument('--max-body-size', default=defaultSettings.maxBodySize, type=int, dest='maxBodySize', help='Max body size', metavar='BYTES')
    parser.add_argument('--behavior', help='Comma-separated list of enabled behavior scripts',
            dest='enabledBehaviorNames',
            default=list (behavior.availableMap.keys ()),
            choices=list (behavior.availableMap.keys ()))
    parser.add_argument('url', help='Website URL', metavar='URL')
    parser.add_argument('output', help='WARC filename', metavar='FILE')

    args = parser.parse_args ()

    logger = Logger (consumer=[DatetimeConsumer (), JsonPrintConsumer ()])

    ret = SingleExitStatus.Fail
    service = ChromeService ()
    if args.browser:
        service = NullService (args.browser)
    settings = ControllerSettings (maxBodySize=args.maxBodySize,
            idleTimeout=args.idleTimeout, timeout=args.timeout)
    with open (args.output, 'wb') as fd, WarcHandler (fd, logger) as warcHandler:
        logger.connect (WarcHandlerConsumer (warcHandler))
        handler = [StatsHandler (), LogHandler (logger), warcHandler]
        b = list (map (lambda x: behavior.availableMap[x], args.enabledBehaviorNames))
        controller = SinglePageController (args.url, fd, settings=settings,
                service=service, handler=handler, behavior=b, logger=logger)
        try:
            controller.run ()
            ret = SingleExitStatus.Ok
        except BrowserCrashed:
            ret = SingleExitStatus.BrowserCrash
        finally:
            r = handler[0].stats
            logger.info ('stats', context='cli', uuid='24d92d16-770e-4088-b769-4020e127a7ff', **r)

    return ret

import asyncio, os
from .controller import RecursiveController, DepthLimit, PrefixLimit

def parsePolicy (recursive, url):
    if recursive is None:
        return DepthLimit (0)
    elif recursive.isdigit ():
        return DepthLimit (int (recursive))
    elif recursive == 'prefix':
        return PrefixLimit (url)
    else:
        raise ValueError ('Unsupported')

def recursive ():
    logger = Logger (consumer=[DatetimeConsumer (), JsonPrintConsumer ()])

    parser = argparse.ArgumentParser(description='Recursively run crocoite-grab.')
    parser.add_argument('--policy', help='Recursion policy', metavar='POLICY')
    parser.add_argument('--tempdir', help='Directory for temporary files', metavar='DIR')
    parser.add_argument('--prefix', help='Output filename prefix, supports templates {host} and {date}', metavar='FILENAME', default='{host}-{date}-')
    parser.add_argument('--concurrency', '-j', help='Run at most N jobs', metavar='N', default=1, type=int)
    parser.add_argument('url', help='Seed URL', metavar='URL')
    parser.add_argument('output', help='Output directory', metavar='DIR')
    parser.add_argument('command', help='Fetch command, supports templates {url} and {dest}', metavar='CMD', nargs='*', default=['crocoite-grab', '{url}', '{dest}'])

    args = parser.parse_args ()
    try:
        policy = parsePolicy (args.policy, args.url)
    except ValueError:
        parser.error ('Invalid argument for --policy')

    os.makedirs (args.output, exist_ok=True)

    controller = RecursiveController (url=args.url, output=args.output,
            command=args.command, logger=logger, policy=policy,
            tempdir=args.tempdir, prefix=args.prefix,
            concurrency=args.concurrency)

    loop = asyncio.get_event_loop()
    stop = lambda signum: controller.cancel ()
    loop.add_signal_handler (signal.SIGINT, stop, signal.SIGINT)
    loop.add_signal_handler (signal.SIGTERM, stop, signal.SIGTERM)
    loop.run_until_complete(controller.run ())
    loop.close()

    return 0

def irc ():
    from configparser import ConfigParser
    from .irc import Chromebot

    logger = Logger (consumer=[DatetimeConsumer (), JsonPrintConsumer ()])

    parser = argparse.ArgumentParser(description='IRC bot.')
    parser.add_argument('--config', '-c', help='Config file location', metavar='PATH', default='chromebot.ini')

    args = parser.parse_args ()

    config = ConfigParser ()
    config.read (args.config)
    s = config['irc']

    loop = asyncio.get_event_loop()
    bot = Chromebot (
            host=s.get ('host'),
            port=s.getint ('port'),
            ssl=s.getboolean ('ssl'),
            nick=s.get ('nick'),
            channels=[s.get ('channel')],
            tempdir=s.get ('tempdir'),
            destdir=s.get ('destdir'),
            processLimit=s.getint ('process_limit'),
            logger=logger,
            loop=loop)
    stop = lambda signum: bot.cancel ()
    loop.add_signal_handler (signal.SIGINT, stop, signal.SIGINT)
    loop.add_signal_handler (signal.SIGTERM, stop, signal.SIGTERM)
    loop.run_until_complete(bot.run ())

def dashboard ():
    from .irc import Dashboard

    loop = asyncio.get_event_loop()
    d = Dashboard (sys.stdin, loop)
    loop.run_until_complete(d.run ())
    loop.run_forever()