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

import logging

import time

class Timer:

    def __init__(self):

        self.timeouts = []

        self.timelast = None

    def add_timeout(self, delay, callback):

        """Register callback to be called after delay seconds.

        delay -- in seconds, float

        callback -- function to be called with no parameters

        """

        if not len(self.timeouts):

            self.timelast = time.time()

        self.timeouts += [[delay, callback]]

    def remove_timeout(self, callback):

        """Unregister callback previously registered with add_timeout."""

        for timeout in self.timeouts[:]:

            if timeout[1] == callback:

                self.timeouts.remove(timeout)

    def has_timeout(self):

        return len(self.timeouts) > 0

    def nearest_timeout(self):

        if not self.has_timeout():

            return None

        return min(self.timeouts)[0]

    def process_timeouts(self):

        if not self.has_timeout():

            return

        now = time.time()

        lasted = now - self.timelast

        self.timelast = now

        for timeout in self.timeouts[:]:

            adjusted_delay = timeout[0] - lasted

            if adjusted_delay <= 0.0:

                timeout[1]()

                self.timeouts.remove(timeout)

            else:

                timeout[0] = adjusted_delay

class Application:

    '''Application class. Defines main loop.'''

        '''Create application.'''

        self.quit = False

        self.driver = self.get_driver_instance(driver)

        self.log = logging.getLogger('tuikit')

        self.log.setLevel(logging.DEBUG)

        handler = logging.FileHandler('./tuikit.log')

        formatter = logging.Formatter('%(asctime)s %(levelname)-5s %(message)s', '%y-%m-%d %H:%M:%S')

        handler.setFormatter(formatter)

        self.log.addHandler(handler)

    def start(self):

        '''Start application. Runs main loop.'''

    def terminate(self):

        '''Terminate application.'''

        self.quit = True

        '''The main loop.'''

        while True:

            self.driver.commit()

            timeout = timer.nearest_timeout()

            events = self.driver.getevents(timeout)

            timer.process_timeouts()

            for event in events:

                if event[0] == 'quit':

                    self.quit = True

                else:

            if self.quit:

                break

        #TODO: allow custom colors:

        #    e.g. "blue (#2020FF) on black (#101010), underline"

        #    color in brackets is used when driver supports custom colors

        driver = self.driver

        driver.setcolor('normal',                  'white on black')

        driver.setcolor('strong',                  'white on black, bold')

        driver.setcolor('active',                  'black on cyan')

        driver.setcolor('window:normal',           'white on blue')

        driver.setcolor('window:controls',         'white on blue, bold')

        driver.setcolor('window:controls-active',  'cyan on blue, bold')

        driver.setcolor('button',                  'black on white')

        driver.setcolor('button-active',           'black on cyan')

        driver.setcolor('menu',                    'black on cyan')

        driver.setcolor('menu-active',             'white on cyan, bold')

        driver.setcolor('combo:normal',            'black on green')

    def get_driver_instance(self, name):

        module = __import__('tuikit.driver_' + name, fromlist=['driverclass'])

        return module.driverclass()