'''
Prefix: .goal

Synax:
    .goal COMMAND ARGS

Commands:
  help - show this help
  extra.help - show extended help
  add - add a goal
  clear - clear completed tasks under current goal
  task ID - add a task under the goal specified by ID
  close ID - mark goal done by ID
  done ID - mark task done by ID
  list - list incomplete goals
  print GOAL_ID - print a goal and all tasks
'''

ex_help = '''
More commands:
    add.vision - add a new vision (collection of goals)
    close.vision ID - mark vision as complete by ID
    dump - dump the full data set - BEWARE - so many messages
    later GOAL_ID - put off goal for 14 days
    list.later - list all 'later' goals
    print.vision ID - print a vision and all goals
    set.vision GOAL_ID VISION_ID- associate GOAL_ID with VISION_ID
    visions - list incomplete visions
    list.done - list completed goals
    remove ID - remove a task by ID
    start GOAL_ID - un-put-off a goal (reverse of later)
    visionless - list goals with no set vision
'''


from datetime import datetime as dt
import logging
import os

import simplematrixbotlib as botlib

from .db import Data, pretty_print

DATE_FORMAT = '%Y-%m-%d'

def today():
    return dt.now().strftime(DATE_FORMAT)

logger = logging.getLogger(__name__)

snark = [
    'Ye cannot get ye flask.',
    'Ye flask must be load bearing, or something...',
    '''You have:
        no tea
    ''',
    'How are you gentlemen?',
    'All your base are belong to us.',
    'You have been eaten by a groo.'
]

class GoalBot():
    def __init__(self, matrix_server,
                 bot_name,
                 bot_pwd,
                 db_file=None,
                 bot_prefix='.goal'):

        creds = botlib.Creds(matrix_server, bot_name, bot_pwd)
        self.bot = botlib.Bot(creds)
        self.prefix = bot_prefix
        self.data = Data(db_file)

    def run(self):
        logger.debug('Running goal bot...')
        self.bot.run()

    async def handle_message(self, room, message):
        match = botlib.MessageMatch(room, message, self.bot, self.prefix)

        if not match.is_not_from_this_bot():
            # Let's not talk to our-self
            return

        logger.debug(f'Message: {message}')
        if not match.prefix():
            logger.debug(f'{message} - did not match {self.prefix}')

        if match.prefix():
            try:
                result_lines = await self._handle_match(match)
                for line in result_lines:
                    await self.bot.api.send_text_message(
                        room.room_id, str(line))
            except Exception as ex:
                logger.warn(f'Caught exception: {str(ex)}')
                dumb_msg_idx = len(str(ex)) % len(snark)
                dumb_msg = snark[dumb_msg_idx]
                await self.bot.api.send_text_message(
                    room.room_id, dumb_msg)

                await self.bot.api.send_text_message(
                    room.room_id, str(ex))


    async def _handle_match(self, match):
        logger.debug(f'Try to match {str(match)}')

        if match.command('setup'):
            result = self.data.setup()
            return [result]

        if match.command('add'):
            new = ' '.join(match.args()[1:])
            goal_id = self.data.add_goal(new)
            results = [f'Goal added with id {goal_id}']

            goals = self.data.get_all_goals()
            results.append('# Goals list...')
            for goal in goals:
                results.append(str(goal))

            return results

        if match.command('list'):
            logger.debug('Asked to list current goals...')
            goals = self.data.get_current_goals()
            results = ['# Goals list...']
            for goal in goals:
                results.append(str(goal))
            return results


        if match.command('list.done'):
            goals = self.data.get_done_goals()
            results = ['# Completed Goals...']
            for goal in goals:
                results.append(str(goal))
            return results

        if match.command('task'):
            new = ' '.join(match.args()[1:])
            goal_id  = self.data.quick_add_task(new)
            goal,tasks = self.data.get_goal(goal_id)
            results = pretty_print(goal, tasks)
            return results

        if match.command('add.vision'):
            new = ' '.join(match.args()[1:])
            result = self.data.add_vision(new)
            return [f'Vision added with id {result}']

        if match.command('print'):
            if len(match.args()) > 1:
                goal_id = int(match.args()[1])
            else:
                goal_id = self.data._get_pref_goal_id()

            logger.debug(f'Searching for goal {goal_id}...')
            goal,tasks = self.data.get_goal(goal_id)
            results = pretty_print(goal, tasks)

            return results


        if match.command('print.vision'):
            get_id = int(match.args()[1])
            vision,goals = self.data.get_vision(get_id)
            results = pretty_print(vision, goals)
            return results

        if match.command('close'):
            goal_id = int(match.args()[1])
            vision_id = self.data.complete_goal(goal_id)
            vision,goals = self.data.get_vision(vision_id)
            results = pretty_print(vision, goals)
            return results


        if match.command('clear'):
            if len(match.args()) > 1:
                goal_id = int(match.args()[1])
            else:
                goal_id = self.data._get_pref_goal_id()
            _ = self.data.clear(goal_id)

            goal,tasks = self.data.get_goal(goal_id)
            results = pretty_print(goal, tasks)
            return results


        if match.command('start'):
            goal_id = int(match.args()[1])
            vision,goals  = self.data.start_goal(goal_id)
            results = pretty_print(vision, goals)
            return results

        if match.command('later'):
            goal_id = int(match.args()[1])
            vision_id = self.data.put_off_goal(goal_id)
            vision,goals = self.data.get_vision(vision_id)
            results = pretty_print(vision, goals)
            return results


        if match.command('close.vision'):
            vision_id = int(match.args()[1])
            self.data.complete_vision(vision_id)
            vision,goals = self.data.get_vision(vision_id)
            results = pretty_print(vision, goals)
            return results

        if match.command('done'):
            ids = match.args()[1:]
            for task_id in ids:
                goal_id = self.data.complete_task(int(task_id))
            # Print the goal of the last closed task
            goal,tasks = self.data.get_goal(goal_id)
            results = pretty_print(goal, tasks)
            return results

        if match.command('dump'):
            goals = self.data.get_all_goals()
            results = ['# Everything ... ']
            for goal in goals:
                _,tasks = self.data.get_goal(goal.id)
                details = pretty_print(goal, tasks)
                results += details
            return results


        if match.command('list.later'):
            goals = self.data.get_all_goals()
            results = ['# All Goals ... ']
            return results

        if match.command('visions'):
            items = self.data.get_all_visions()
            results = ['# Visions']
            if not items:
                results.append('-- No current visions --')

            for item in items:
                results.append(item)
            return results

        if match.command('visionless'):
            items = self.data.visionless()
            results = ['# Goals with no vision']
            if not items:
                results.append('-- No visionless goals --')

            for item in items:
                results.append(item)
            return results

        if match.command('set.vision'):
            goal_id = int(match.args()[1])
            vision_id = int(match.args()[2])
            self.data.assign_vision(goal_id=goal_id, vision_id=vision_id)
            vision,goals = self.data.get_vision(vision_id)
            results = pretty_print(vision, goals)
            return results


        if match.command('rename'):
            goal_id = int(match.args()[1])
            name = ' '.join(match.args()[2:])
            self.data.rename_goal(goal_id=goal_id, name=name)
            goal,tasks = self.data.get_goal(goal_id)
            results = pretty_print(goal, tasks)
            return results

        if match.command('remove'):
            task_id  = int(match.args()[1])
            result = self.data.remove_task(task_id)
            return [result]

        if match.command('extra.help'):
            return [ex_help]

        # Help text
        return [__doc__]